US 3525830 A
Description (OCR text may contain errors)
Aug. 25, 1970 P. M. HAwKlNs 3,525,830
LOCK SWITCH DEVICES Filed March 14, 1967 8 Sheets-Sheet 3 1 y 'IIIV/ All@ 25, 1970v P. M. HAwKnNs 3,525,830
LOCK SWITCH DEVICES Filed March 14, 1967 8 Sheets-Sheet 4 T :1l-E. 204 y www.Hmwwanuf I N VEN TOR.
Aug- 255- 1970 P. M. HAWKINS 3,525,830
LOCK SWITCH DEVICES Filed March 14, 1967 8 Sheets-Sheet 5 AUS- 25, 1970 P. M. HAWKINS 3,525,830
Loox SWITCH DEVICES Filed March 14, 1967 8 Sheets-Sheet 6 F. M. HAWKINS LOCK SWITCH DEVICES Aug. 25, 1970 8 Sheets-Sheet '7 Filed March 14, 1967 C BY Aug. 25, 1970 P. M. HAW'KINS 3,525,830
i LOCK SWITCH DEvCEs Filed March 14, 1967 v 8 Sheets-Sheet 8 United States Patent O U.S. Cl. 200-44 17 Claims ABSTRACT F THE DISCLOSURE Integrated locks and switches, the locks having sliding bolts which latch into projected position; the switches being arranged to operate :when either the lock casing is forced or when a special strike-switch assemb-ly is forced.
This is a continuation-impart of a copending application Ser. No. 568,546, filed July 28, 1966.
This invention relates to lock-switch arrangements of the type which respond to jimmying or prying forces to signal an attempted unauthorized intrusion.
The general idea of a combination lock and switch to produce a signal in response to jimmying forces has long been known. In the past however, the actual use of such devices has been quite limited. This in part was due to the considerable expense and complexity of these devices. Perhaps even more important however, was the fact that special rather Lmajor structural changes had to be made to the room or other area being protected. Special mortices had to be formed in doors, windows and their frames to accommodate the locking arrangements.
The present invention eliminates the diflculties associated with the construction and installation of lockswitches. Moreover, it permits simple and convenient surface mounted installations and yet maintains a full degree of protection to the closure.
According to one aspect of the present invention, there is provided a lock switch arrangement comprising a bolt `housing mounted for limited movement with respect to an anchor plate. The anchor plate is secured, as by screws, to the surface of a door, window or to the surrounding frame. When the bolt housing is in place on the anchor plate, it covers the mounting screws. A switch is arranged in conjunction with the anchor plate and bolt housing to be actuated Whenever any forcible attempt is made to lift the housing and expose the anchor screws. 'Ihis switch of course also becomes actuated by any attempt to forcibly open the door or window on which the lock-switch arrangement is mounted. As will ybe described more fully hereinafter, one embodiment of the present invention comprises a self contained unit which utilizes novel switching means to initiate a locally generated acoustical alarm.
According to another aspect of the invention, there is provided a novel strike-switch arrangement which responds to prying or jimmying forces applied thereto through the lock bolt. This novel strike switch is rugged and reliable and yet it is of compact and economical construction, and is suitable for mounting in a window or door frame without major structural modification thereof. This novel strike-switch comprises a guide-block, slideblock arrangement with the slide-block arranged to slide in a groove or channel along the guide-block. A special housing arrangement is provided for the guide block as is special spring means to bias the slide-block to one end of the channel. A switch is mounted on the back of the guide block, and this switch is connected as through a slot in the guide block to be operated by movements of the slide block.
There has thus been outlined rather broadly the more important features of the invention in order that the detailed description thereof that follows may be better understood, and in order that the present contribution to the art may be better appreciated. There are, of course, additional features of the invention that will be described hereinafter and which will form the subject of the claims appended hereto. Those skilled in the art will appreciate that the conception upon which this disclosure is based may readily be utilized as a basis for the designing of other structures for carrying out the several purposes of the invention. It is important, therefore, that the claims be regarded as including such equivalent constructions as do not depart from the spirit and scope of the invention.
Specic embodiments of the invention have been chosen for purposes of illustration and description, and are shown in the accompanying drawings forming a part of the specification, wherein:
FIG. 1 is a front elevational view illustrating a window arrangement incorporating one embodiment of the present invention;
FIG. 2 is an enlarged fragmentary perspective View illustrating the mounting of the embodiment of FIG. 1;
FIG. 3 is a perspective View, partially broken away, of the block and switch portions of the arrangement of FIG. l;
FIG. 4 is an enlarged fragmentary perspective view, partially broken away, showing the internal configuration of the lock-switch arrangement of FIG. 1;
FIG. 5 is an enlarged section view taken along line 5-5 of FIG. 1;
FIG. 6 is an exploded view of the lock and switch portions of the arrangement of FIG. 1;
FIG. 7 is a section view taken along line 77 of FIG. 2;
FIG. 8 is section view similar to FIG. 7 but showing the lock and switch arrangement in protracted or locking condition;
FIG. 9 is a perspective view illustrating a lock and alarm arrangement forming a second embodiment of the present invention:
FIG. 10 is a view taken along line 10-10 of FIG. 9;
FIG. 11 is a view taken along line 11-11 of FIG. 9;
FIG. 12 is a View similar to FIG. 11 but showing the device in forced or alarm actuating condition;
FIG. 13 is a section view taken along line 13-13 of FIG. 9;
FIG. 14 is a View similar to FIG. 13 showing the device in its triggered condition;
FIG. 15 is a view taken along line 15--15 of FIG. 13;
FIG. 16 is a view taken along line 16-16 of FIG. 14;
FIG. 17 is a partially exploded View of the embodiment of FIG. 9;
FIG. 18 is a fully exploded view of the embodiment of FIG. 9;
FIG. 19 is a perspective view of a window arrangement sho-wing a further embodiment of the present invention;
FIG. 20 is a partially exploded view of the embodiment shown in FIG. 19;
FIG. 21 is a section view taken along line 21-21 of FIG. 19,
FIG. 22 is an exploded view of a portion of the embodiment of FIG. 19;
FIG. 23 is a section View taken along line 23-23 of FIG. 2l;
FIG. 24 is a perspective view showing a still further embodiment of the present invention; and
FIG. 25 is an exploded view showing the internal configuration of the embodiment of FIG. 24.
FIG. 1 illustrates a window installation arrangement incorporating one embodiment of the present invention. As shown in FIG. 1, a lock-switch structure, depicted generally at 30, is arranged to lock a lower sash 32 of a window arrangement 34. The lock-switch 30 is secured to a window frame 36 in which the lower sash 32 slides. In the particular arrangement shown, the lock-switch 30 is also positioned at a location where the lower sash 32 and an upper sash 38 overlap when the two sashes are in their fully closed positions as illustrated in FIG. 1.
FIG. 2 shows in greater detail the general construction of the lock-switch arrangement 30. As shown in FIG. 2, the device is made up of an anchor member 40 which is secured to the window frame 36, and a bolt housing 42, which is nested in a corner recess in the anchor member 40. The housing 42 and the anchor member 40 as shown, are dimensioned so that when they are nested together, their outer surfaces are contiguous so as to provide the appearance of `a single compact block.
The housing 42 has a plug bore 44 extending therethrough in a direction transverse to the direction of movement of the lower sash 32. Thus, while the lower sash 32 moves up and down in a vertical direction, the bore extending through the housing 42 extends in a horizontal direction toward and away from the lower sash 32. A cylindrical plug 46 is closely fitted into the plug bore 44 of the housing 42. Additionally, there is provided a key operated lock cylinder 48 which extends into the plug 46 and which has a key slot 50 exposed at the front surface of the plug 46.
Turning now to FIG. 3, it will be seen that the anchor member 40 is made up of a relatively thin ange portion 50 and a thicker switch housing portion 52 which extends out from the ange portion. The flange portion 50 iS provided with several mounting holes 54 through which screws or bolts may pass to secure the anchor member 40 against the windo-w frame 36. It will be noted that the holes 54 are completely covered by the bolt housing 42 when the device is fully assembled.
The switch housing portion 52 of the anchor member 40 is provided with a recess 56 which opens out onto the surface coinciding with the outer face of the flange portion 50. An electrical switch 58 is set inside the recess 56. The switch 58 includes an actuation button 60 and a flexible leaf-spring switch arm 62 which extends over the button 60. This switch arm 62 is normally in an upward position up off from the button 60; but it is held down against the button 60 by the action of the bolt housing 42 when the bolt housing is in its normal or unactuated position as shown in FIGS. 2 and 3. Also as shown in FIG. 3, a smaller diameter opening 64 is provided in the end of the bolt housing 42 which faces the window sash 32, in order to permit projection of a locking bolt as will be explained more fully hereinafter.
As shown in the cutaway view of FIG. 4, the anchor member 40 is mounted so that its anged portion 50 lies flat against the window frame 36 in a position adjacent to the front surface of the window sash 32. In this mounting arrangement, the switch recess 56 is covered by the window frame 36. At the same time, the mounting bolt openings 54 are covered by the bolt housing 42. Thus neither the switch nor the mounting bolts are accessible to tampering.
As further shown in FIG. 4, the plug bore 44 in the bolt housing 42 opens out onto the front end of the housing 42. The bore 44 extends through the housing to a location close to, but not all the way to the opposite end of the housing, thereby leaving an end wall 66 at the opposite end of the housing. The bolt opening 64 passes through the end wall 66 thereby communicating with the plug bore 44.
It will be noted that the plug 46 which ts closely within the plug bore 44 is considerably shorter in length than the bore 44 and therefore can move reciprocally back and forth within the bore. A cylindrical locking bolt 68 is integrally attached to the inner end of the plug 46 and extends from the plug 46 in alignment with the bolt opening 64. Thus when the plug 46 moves back and forth 4 along the plug bore 46 the locking bolt 68 projects from and retracts into the bore 64. As will be described more fully hereinafter, means are provided for securing the plug 46 in its inward position as shown. This hold the bolt 68 in protracted position extending out from the housing 42 and into the lower sash 32.
The lower sash 32 is provided with a bolt receiving arrangement comprising a tubular bolt receiving housing 70. This bolt receiving housing is of tubular conguration and has an internal diameter dimensioned to accommodate the bolt 68 in close sliding relationship when the bolt is projected as illustrated in FIG. 4. It will thus be seen that when the bolt 68 is projected, the lower sash 32 cannot be moved upwardly because it is held through the action of the bolt 68, the plug 46, the bolt housing 42 and the anchor member 40 to the window frame 36.
The present arrangement, as illustrated in FIG. 4, is further adapted to provide automatic locking for the upper window sash 38 at the same time that the lower window sash 32 is locked in place. To this end, the lower window sash 32 is provided with the bore 72 which extends completely therethrough. The tubular bolt receiving housing 70 extends completely through the bore 72 and opens out onto the opposite face of the window sash 32. Within the housing 70 there is provided an additional spring biased bolt member 74 which is normally maintained completely within its housing 70. However, whenever the bolt 68 is projected into the housing 70, it displaces the bolt 74 causing it to project out toward the upper window sash 38. The upper window sash 38 is likewise provided with its own bolt receiving housing 76 in alignment with the bolt 74 when the upper and lower sashes are in their fully closed positions. Thus, when the key operated locking bolt 58 is projected into the housing 70 to lock the lower sash 32 into closed position, this action also causes projection of the bolt 74 from the lower shaft 32 into the bolt receiving housing 76 in the upper sash 38, thereby also locking that sash in closed position.
The construction of the bolt receiving housing 72 in the lower sash 32 is best illustrated in FIG. 5. As there shown, the bolt 74 is provided with a larger diameter portion 78 in the region thereof closest to the lock-switch device 30. It is this larger diameter portion 78 which is contacted by the locking bolt 68 of the lock-switch device 30.
The housing 70 itself is provided with the longitudinal slot in the region of the enlarged portion 78; and a small guide screw 82 is threaded through the slot 80 and into the larger diameter portion 78 of the bolt 74 so that its head projects into the slot 80. The screw 82 allows the bolt 74 to move back and forth over a distance corresponding to the length of the slot 80. A bias spring 84 surrounds the bolt 74 between its larger diameter portion 78 and a wall 85 at the inner end of the housing 70. The spring 84 normally holds the bolt 74 in a retracted position as shown in FIG. 5. Thereafter, when the bolt 68 from the lock-switch assembly 30 is projected into the housing 70, it engages the larger diameter portion 78 of the bolt 74 and moves it to the left as shown in FIG, 5. This causes the bolt 74 to project into the housing 76 of the lower sash 38 thereby locking the upper and lower sashes 38 and 32 together, while the lower sash 32 is locked via the lock-switch assembly 30 the window frame 36.
As illustrated in FIG. 5, the bolt housing 42 itself is provided with the longitudinal slot which extends from the plug bore 44 out onto the surface which rests against the ange portion 50 of the anchor member 40. A small guide screw 92 passes through the slot 90 and is threaded into the plug 46. The head of the guide screw 92 thus moves back and forth along the slot 90 as the plug 46 moves back and forth within its bore 44. It will be appreciated that the guide screw 92 thus limits the amount of longitudinal movement which the plug 46 may undergo within the housing 42. The position and length of the slot 90 are set so that the plug 46 may more from a first position with its outer surface flush with the outer surface with the housing 42 and the bolt 68 fully retracted, as shown in FIG. 2, and a second position, with the plug 46 lying well within the housing 42 and its locking bolt 68 fully projected into the housing 70 of the lower sash 32 as illustrated in FIG. 4.
As shown in the exploded View of FIG. 6, the bolt housing 42 is provided with a lug 94 which fits into a recess 96 in the switch housing portion S2 of the anchor member 40. A threaded force adjustment bolt 98 passes up through the center of the recess 96 and is threadedly engaged into the lug 94 of the bolt housing 42 to hold it in place on the anchor member 40. Also, as shown in FIG. 6 the resilient leaf spring switch arm 62 passes up through the upper surface of the portion 52 and engages the housing 42 in a guide recess 100 provided therefor. When the housing 42 is flat against the upper surface of the switch housing portion 52, the surface of the recess 100 presses downwardly against the switch arm 62. However, if the housing 42 is lifted upwardly off from the surface of the switch housing portion 52, such movement will allow the switch arm 62 to move upwardly, thus actuating the switch 58.
Turning now to FIG. 7. It will be seen that the switch housing portion 52 of the anchor member 40- is provided with a counterbore 102 in alignment with and extending to a location close to the lower end of the recess 96. The counterbore 102 and the recess 96 communicate with each other via a bolt accommodating opening 104 through which the bolt force adjustment 98 passes. A force responsive spring 106 surrounds the force adjustment bolt 98 between the head thereof and the opening 104 in the switch housing portion 52 of the anchor member 40. The spring 106 serves to pull the head of the force adjustment bolt 98 downwardly, as shown in FIG. 7, thereby pulling the bolt housing 42 down against the surface of the switch housing portion 52. When however, the bolt 68 is projected and force is applied to try to lift open the window sash 32, this upward force will tend to move the housing 42 up oft from the switch housing portion 52 against the action of the force responsive spring 106. When this occurs, as stated above, the switch arm 62 will move upwardly thus actuating the switch 58. It will be appreciated that by turning the force adjustment bolt 98 the distance between its head and the opening 104 can be adjusted thereby controlling the tension of the spring 106 and adjusting the amount of force necessary to actuate the switch 58.
As illustrated in FIG. 7, the plug 44 is biased toward its outer position (with the bolt 68' fully retracted) by means of one or more plug bias springs 110 which extend between the housing end wall 66 and the plug 46 itself. The springs 110 are guided by means of support rods 112 which extend inwardly from the wall 66 of the housing 42 toward the plug 46. When the plug 46 is pushed in- 'wardly to project the bolt 68, the rods 112 project into inner bores 114 provided within the plug 46 itself.
The housing 42 is additionally provided with a latch bore 116 which extends into the interior wall surface of the plug bore 44. The latch bore 116 is positioned to accommodate a latch lug 118 within the plug 46. This latch lug 118 is biased outwardly by spring means (not shown), and is retracted by turning a proper key within the key cylinder 48. When the plug 44 is retracted as shown in FIG. 7 the latching lug 118 is held in its upper or retracted position by the inner surfaces of the plug bore 44. When however, the lug 46 is pushed forwardly to project its bolt 68 as illustrated in FIG. 8, the latching lug 118 comes into alignment with the latching bore 116 and projects into the bore to hold the plug 46 in its inner position against the action of the plug bias springs 110. 'Ihus the device will remain in its locked condition and cannot be taken out of its locked condition except by turning a key to retract the latching lug 118 out of the latching bore 116.
During operation of the above described arrangement no effect whatever is produced upon either the upper or lower sashes 38 and 32 when the lock switch device 30 is in its non-locking position. Thus either or both sashes may be opened or closed at will. Locking of the sashes is effected simply by exerting thumb or finger pressure on the plug 46 to project the bolt 68 into the housing 70 in the lower sash 32. When this occurs, the additional locking bolt 74 projects into the housing 716 of the upper sash 38 thus locking the two sashes together and locking the lower sash 32 via the lock switch device 30 to the window frame 36.
At the same time, the device is automatically secured in its locked condition by virtue of the latching lug 118 which comes into alignment with the latching bore 116 of the bolt housing 42.
Should any attempt be made force open the lower sash 32, such force would be communicated via the bolt 68 against the housing 42, tending to move it upwardly olf the anchor member I40 which is secured to the window frame 36. This upward force is resisted, to a certain degree, by the force responsive spring 106. However, when the restraint offered by the spring 106 is overcome, the housing 42 'will move upward slightly olf from the switch housing portion of the anchor member 40 thus allowing the switch arm 62 to move up from the switch bottom 60 thereby actuating the electrical switch 58. The electrical switch 58 is connected to external means (not shown) for actuating a remote alarm.
It will be appreciated the above described arrangement is easily mounted on window and window frame surfaces with the minimum of structural changes required for either. Moreover, in spite of the fact that this arrangement is surface mounted, it will be appreciated that it is impossible to remove or otherwise disable the lock or switch without causing an alarm to be sounded. Thus, any attempt to dismantle the lock arrangement, as for example, by removing the bolt 98 which holds the bolt housing 42 to the anchor member 40, would result in actuation of the electrical switch 58 and sounding of an alarm.
FIGS. 9 through 18 illustrate a self contained window lock-alarm unit according to the present invention for mounting on windows and the like and for producing a locally generated acoustical alarm Without need for external electrical power. As shown -in FIG. 9, there is provided a lock-alarm unit depicted generally at 200 and mounted the top surface of a lower 'window sash 202 in close positional relationship to a slide or edging member 204 of an upper window sash 206. The lock alarm unit 200 includes an anchor plate 208, which is fastened to the lower sash 202, and an outer casing 210, which fits over the anchor plate 208. Toward one end of the Outer casing 210 there is provided a horizontally extending plug bore 212 which houses a locking plug 214 similar to the plug 46 of the preceding embodiment. A11 acoustic alarm speaker 216 is mounted on top of the outer casing 210 for transmitting the locally generated alarm sounds. There are also provided a pair of tension adjusting bolts 218 which may be turned down to adjust the amount of prying force necessary to actuate the alarm.
As shown in FIG. 10, the plug 214 is provided with a locking bolt 220y which extends from one end thereof, and which projects, when the plug 214 is pressed inwardly, into a bolt receiving recess 222 in the slide member 204 of the upper window sash 206 thereby effectively locking the upper and lower sashes 206 and 202 together.
As shown in FIG. 1l, the tension bolts 218 extend down through the outer casing 210, and are threaded into the anchor plate 208. Force sensing springs 224 surround the bolts 218 between their heads and lower surfaces 226 of the outer casing 210. Thus, in order to lift the outer casing 210 olf from the anchor plate 208 it is necessary to compress the force responsive springs 224. It will be appreciated that the amount of force necessary to achieve this lifting action will depend upon the degree to which the tension bolts 218 are turned down, for this establishes the amount of stress with which the springs 224 resists the upward movement of the outer casing 210.
As shown in FIGS. 11 and 12, the action of forcing either the upper window sash 206 downwardly or of forcing the lower window sash 202 upwardly, will produce a reaction between the locking bolt 220 and the recess 222 into which it is engaged so as to effect a tipping action of the outer casing 210 of the lock-alarm assembly 200 with respect to the anchor plate 208. It will also be appreciated that when this tipping action takes place, a latching surface 230, associated with the outer casing 210, becomes lifted up oil:` from a lug 232 associated with the anchor plate 208. When this occurs there will be provided a switching action for actuating the alarm. The mannery in -which this switching action is effected will be described more fully hereinafter.
As shown in FIG. 13 the outer casing 210 is basically of hollow construction and has mounted therein, just under the speaker 216, an electrically powered alarm generator 234. This alarm generator may be an electrical siren such as that described in co-pending application entitled Acoustical Alarm, Ser. No. 530,883 led Mar. l, 1966; or it may comprise a conventional electrically operated buzzer. The alarm generator 234 receives positive potential via a wire 236 which is connected to a grommet 238 in a battery clip 240. The battery clip 240 is made of ber, plastic or other insulative material, and is constructed to contain therein one or more batteries 242, or corresponding electrical power sources. The positive terminal of the battery 242 is maintained in contact with a spring like contact element 244, and this in turn is connected to the grommet 238 to complete the positive connection to the electrical alarm generator 234. The negative or ground connection from the electrical alarm generator 234 is effected through the outer casing 210 which itself is of metal or other conductive material. As shown in FIG. 13, however, the negative end of the battery 242 is held, by means of an insulative button 246 at the rear of the battery clip 240, away from the outer casing 210. The entire battery clip 240 is held in a forward position by the action of the lug 232, associated with the anchor member 208, upon the rear latching surface 230 of the battery clip 240. At the same time spring bias means (described more fully hereinafter) act to urge the battery clip 240 in a rearward direction.
When the outer casing 210 is forced upwardly by a prying or jimmying action on the window sashes 204 or 206, the outer casing 210 is lifted upwardly to a slight degree from the anchor plate 208 against the action of the force responsive springs 224. This causes the rear surface 230 of the battery clip `240 to be raised up oliC from the lug 232 on the anchor plate 208. As a result, the biasing arrangement (to be described) causes the entire battery clip 240 to move rearwardly as illustrated in FIG. 14 thereby bringing the negative end of the battery into contact with an internal shoulder 248 near the rear of the outer casing 210. This completes an electrical circuit between the battery 242 and the alarm generator 234 so as to cause the production of an acoustical alarm via the speaker 216.
It will be noted that the lug 232 is mounted on a leaf spring 250 so that when the forcing or jimmying action which causes the alarm to be sounded is removed, the battery clip 240 will simply press down upon the lug 232 but will not be moved by the lug out of contact with the shoulder 248. Thus the alarm will continue to function until the battery clip `240 is moved forwardly again so as to break the connection at the shoulder 248 and permit the lug 232 to move upwardly behind the rear surface 230 of the battery clip 240.
The spring biasing arrangement which tends to move the battery clip 240 in a rearward direction is illustrated in FIGS. 15 and 16. As shown therein the battery clip 242 is provided with laterally extending lugs 250 which project outwardly from each side thereof. These lugs move back and forth with the battery clip 240 within longitudinal extending recesses 252 within the outer casing 210. A pair of guide rods 254 extend along the recesses 252 and are secured to the outer casing 210 at the forward end of these recesses and pass through openings (not shown) in the lugs 250 to assist in guiding these lugs in their longitudinal movement. Coil bias springs 256 surround the guide rods 254 between the front end of the recesses 252 and the lugs 250, and these springs urge the lugs and the battery clip 240 in a rearward direction.
As pointed out above, the action of the plug 214 and the locking bolt 220 to achieve locking is the same as in the embodiment of FIGS. 1-8. In the present embodiment, however, the plug 214 additionally provides a reset function. This is achieved by the provision of a recess 260 along one side of the plug 214 (FIGS. 13-16). This recess has a tapered cam surface 262 toward the bolt end thereof. Additionally, the rear end wall 230 of the battery clip 240 tits into the recess 260 when the battery clip 240 is moved by the bias springs 256 to a rearward position as shown in FIGS. 14 and 16. When the locking plug 214 is retracted, however, to an unlocked position as shown in FIG. l5 the cam surface 262 of the recess 260 acts upon the rear wall 230 of the battery clip 240 urging the battery clip 240 to a forwardmost position. When the battery clip reaches its forwardmost position, then the lug 232 under the inuence of its leaf spring 249 will move upwardly to latch the battery clip 240 into its forwardmost position. Thereafter the window sashes 202 and 206 are locked together by pushing inwardly on the plug 214 to cause the bolt 220 to project into the bolt recess 222. When this occurs, the plug 214 moves to a position such that its recess 260 becomes aligned with the latch wall 230 of the battery clip 240. Thus, when the outer casing 210 is raised, the battery clip 240 upon release from the lug 232 will be enabled to move rearwardly under the influence of the bias springs 256 so that the rear of the battery 242 may contact the shoulder 248 of the outer casing 21-0 to complete the circuit between the battery 242 and the alarm generator 234 to sound an alarm.
The exploded view of FIG. 17 illustrates in 'greater detail the actual constructional details of the outer casing 210 and the anchor plate 208. As illustrated in FIG. 17 there is provided an elongated leaf type spring member 264 which is secured at one end to the top of the anchor plate 208 and which normally extends upwardly toward the bottom of the battery clip 240 so as to hold the battery clip 240 up into the outer casing 210.
Thus, when the outer casing 210 is moved upwardly the spring 264 will cause the battery clip 240 to move upwardly with the casing so that it will be enabled to clear the lug 232.
Also as shown in FIG. 17, there are provided a pair of upwardly protruding bosses 266 on the anchor plate 208; and these bosses are threaded to receive the tension bolts 218 which proceed through the casing 210. The tension bolts 218 thus permit up and down movement of the outer casing 210 and at the same time provide a certain amount of -guidance to prevent lateral movement thereof. At the opposite end of the anchor plate 208 there are provided a pair of upstanding lugs 268 which protrude up into guide openings 270 in the outer casing 210 to assist in this guiding action.
As shown in FIG. 17 the anchor plate 208 is secured by means of screws 272 into the upper surface of the window sash 202. It will be noted that when the outer casing 210 is in place on top of the anchor plate 208 the mounting screws 272 are completely hidden from view and access may not be had to these screws unless and until the outer casing 210 is removed. However, the outer casing 210 cannot be lifted up off the anchor plate 208 without the battery case clip 240 clearing the retaining lug 232 and being urged rearwardly to make contact with the casing shoulder 248 to set 01T the alarm. Thus the device is intrinsically tamperproof.
As shown in FIG. 17, the outer casing 210 is provided with a slot 274 which extends along across its lower surface at the bolt end thereof. A guide screw 276 extends into the slot 274 and is threadedly engaged with the plug 214. The guide screw 276 thus prevents the plug 214 from rotating within the bore 212, and at the same time it limits the longitudinal movements of the plug between its protracted or locked, and retracted or unlocked positions. There is additionally provided a latch bore 278 in the lower surface of the outer casing 210 and into which a spring biased latch element (not shown) from the plug 214 extends when the plug is in its protracted or locked position. This latch is retracted from the latch bore 278 by the operation of a key in a key cylinder 280 which extends longitudinally within the plug 214 as in the preceding embodiment.
Turning now to FIG. 18 the various elements making up the self-contained acoustical alarm embodiment of the present invention can be seen in relation to each other. It will be appreciated that the entire assembly utilizes a relatively small number of parts and yet is compact and rugged and is essentially tamperproof. Moreover, the arrangement is inherently rugged and at the same time provides a pleasing appearance.
FIGS. 19-23 show an arrangement of the present in- Vention suitable for use on casement or swing out type windows. As shown in FIG. 19, a casement type window 300 is arranged to swing out in the direction of an arrow A, away from a window frame 302. The window frame 302 includes a lower sill 304 which runs along the bottom of the window 300. A lock-switch arrangement shown generally at 306 is mounted in conjunction with the window 300 and the frame and sill 302 and 304. The lock-switch arrangement 306 comprises a bolt casing 308 which is secured to the edging of the window 300, and a strike plate arrangement 310 which is recessed into the sill 304. As shown in FIG. 19, when the Window 300 is closed, the bolt casing 308 is positioned directly above strike plate arrangement 310.
As shown in FIG. 20, the 4bolt casing 308 is formed with a vertically extending bore 310 into which a lock plug 312 closely fits. The lock plug 312 may be depressed downwardly into the bore 310 to project a bolt (not shown) into a bolt opening 314 in the strike plate assembly 310. The strike plate assembly 310 itself is provided with a cylindrical lower housing 316 which sets into an opening provided therefor in the window sill 304. As shown in FIG. 20, there is provided a flat flange portion 318 on the top of the cylindrical housing 316, which rests flush with the upper surface of the sill 304. The flange portion 318 is provided with a plurality of mounting holes 320 through which screws or other fastening devices may be provided to secure the assembly 310 to the window sill 304.
Turning now to FIG. 2l, it will be noted that the bolt casing 308 is provided with a pair of counter-bored mounting holes 322 through which mounting screws or bolts 324 pass for securing the housing 308 to the edging of the window 300. A pair of access holes 326 are arranged in alignment with the mounting holes 322 directly across the bore 310. The access holes 322 permit the application of a screwdriver or other tool to secure the bolts 324 or other fastening devices in place. It will be noted in this connection that when the plug 312 is positioned within the bore 310, it covers the region between at least one of the access holes 326 and its associated mounting hole 322. Thus, one may not remove the bolt housing 308 from the window 300 when the plug 312 is in place.
The plug 312 is provided with a bolt 328 which extendsfrom the lower end thereof out through a bolt opening 330 in the bottom of the bolt housing 308 when the plu-g 312 is in its depressed position as shown in FIG. 2l. When the plug 312 is in its retracted position however, as shown in FIG. 20, the bolt 328 is retracted entirely within the housing 308. There is provided a lock cylinder 332 'which extends through the plug 312 and which is provided with the usual key slot opening 334 (shown in FIG. 20) for turning same within the plu-g 312. Rotation of the lock cylinder 332 causes a latch lug 336 to be retracted into the side of the plug 312. The latch lug 336 is resiliently biased to a projecting condition as shown in FIG. 12. When the plug 312 is in its lowermost position as shown in FIG. 21, the latching lug 336 projects down into a recess 338 provided in the bore 310. 'Ihis serves to hold the plug 312 in its lowermost or locking condition as shown in FIG. 21.
When the plug 312 is in its lowermost or locking position as shown in FIG. 21, the bolt 328 projects down into the opening 314 in the strike plate assembly 310. This serves to secure the bolt housing 308 and, correspondingly the window 300, to the strike plate assembly 310, thereby locking the window 300 to the still 304.
The strike plate assembly 310, in addition to providing an anchorage for the bolt 328, also serves to monitor any forces produced upon the window 300 which tend to move the bolt in a direction toward opening of the window. To this end, there is provided a slide block 340 within the cylindrical housing 316 of the strike plate assembly 310. As shown in FIG. 22, the slide block 340 is movable in a horizontal direction back and forth within a channel 342 cut diametrically through a guide block 344 which fits closely within the cylindrical housing 316. The slide block 340 is provided with a bore 346 which is dimensioned to provide close tting access to the bolt 328 when it is projected from the housing 308.
The slide block 340 is guided for back and forth movement within the channel 342 in the guide block 344. It will thus be seen that the slide block bore 345 moves back and forth immediately vunder the opening 314 in the strike plate assembly '310. The opening 314 itself is elongated to permit the bolt 328 to move back and `forth a slight amount as the window 300 is forced in the direction of the arrow A (FIG. 19). This movement will urge the slide block 340y over a distance sufficient to traverse the clearance B (FIG. 20) between the edge of the bore 346 and the slide block 340 and one end of the elongated slot 314 in the strike plate assembly 310. This lmovement of the slide block 340 is resisted by means of a compression spring 350 positioned between the slide block and the inner surface of the cylindrical housing 316.
It will be appreciated that the above described arrangement the window 300 is capable of being forced toward an open position only by forces sufficient to overcome the resistance of the spring 350 when the lock assembly 306 is put in locking condition; and even when the force of the spring 350 is overcome, the window may be moved only through the distance B whereupon the bolt 328 will come in contact with the end of the elongated slot 314 and will be thereby prevented from further movement.
As shown in FIG. 22, the slide block 340 is provided with an upstanding lug 351. This lug engages an arm 352 on an electrical switch 354 which is mounted on the lower surface of the guide block 344. The lug 351 moves back and forth within a slot 356 formed in the bottom of the guide block 344.
Turning now to FIG. 23 it will be seen that the spring 350 urges the slide block 340 in a direction such that the lug 351 thereon urges the switch arm 352 in a direction such that the switch arm presses against a switch button 358 on the switch 354 itself. The switch arm 352 is of resilient material such as spring steel and normally assumes a position out and away from the button 358. The force of the spring 350 far exceeds the resilient biasing force on the switch arm 352 and therefore holds it against the switch button 358. When, however, prying or jimmying forces are imposed upon the window 300 to a degree suicient to evercome the resistance of the spring 350, then the slide block 340 will move outwardly against the action of the spring 350 and retract the lug 351 from the switch arm 352. This movement permits the switch arm '352 to move away from the button 358 thus actuating the switch 354.
As shown in FIG. 21, there are provided wires 360 leading from the electrical switch 354 and these wires out through an opening 362 in the bottom of the cylindrical housing 316 to a remote alarm means for providing actuation thereof in accordance with the actuation of the switch 354.
It will be appreciated that the arrangement shown in FIGS. 19-23 is quite compact and simple in construction and yet provides substantial protection and automatic signalling of any attempts to disable or remove the locking arrangement.
While the arrangements shown in FIGS. 19-23 are designed especially for convenient and rapid mounting on window arrangements which have already been built, the principles of the present invention are also suitable for use in conjunction with arrangements designed for use on custom installation whereby window locks are specially built into the edging of the window themselves. Such an arrangement is shown in FIGS. 24 and 25.
In the arrangement of FIGS. 24 and 25 there is provided a easement or swinging type window 370 made up of glass pane portions 372 and edging portions 374. The edging portions 374 are of hollow construction; and they are provided with a latching handle 376 and key lock arrangement '378. The window 370 swings outwardly in the direction of an arrow C to open out from a window frame 380. In order to latch the window 370 in its closed position, there are provided latching elements382 at the bottom and the top of the window in the region of the edging 374. These latching elements are retracted and projected by operation of the latch handle 376; and when they are projected, the latching elements 382 project into strike assemblies 384 and 386 at the bottom and top of the window frame 380 respectively to latch the window 370 in its closed position as shown in FIG. 24. When the lock 378 is operated, the latch elements 382 become secured in their projected position so that the window is effectively locked.
Turning now to FIG. 25, it will be seen that the window edging 374 includes front and rear channel members 388 and 390 which, when assembled form a hollow passageway extending from the bottom to the top of the window. Guide blocks 392 are provided at the top and bottom of the edging 374. These guide blocks have bores formed therethrough to permit the latching elements 382 to project and retract from the window 370. The latching elements 382 are secured to plates 394 near the center of the edging 374 within the channel members 386 and 390. Each of these plates are provided with a gear rack 396 which meshes with an operating gear 398. The gear 398 is connected by means of a coupler -400 to the latch knob 376 so as to be turned in place thereby. Turning of the latch knob 376 thus rotates the gear 398 causing one of the racks 396 to move upwardly and the other to move downwardly thus retracting or projecting the latch elements 382 together. When the latch elements are in their projected condition, an opening 402 in one of the plates 394 comes into alignment with locking bolt element 404 operated by the lock 37 8. When the lock is operated while latching elements 3-82 are in their projected condition, the bolt element 440 passes into the opening 402 thus t secure the latching elements 3-82 in their projected or locking condition.
As can be seen in FIG. 25, the lower strike plate assembly is of the same construction as the strike plate assembly 310 of the embodiment shown in FIGS. l9-23. Thus there is achieved a combination locking and alarm actuating arrangement which provides a maximum degree of security in a custom built installation. It will of course be realized that the upper strike plate assembly 384 may likewise be constructed in the manner of the lower strike plate assembly 38'6 so as to insure that any prying action either at the top or the bottom of the window 370 will result in actuation of the switching arrangement to sound an alarm.
Having thus described my invention with particular reference to the preferred forms thereof, it will be obvious to those skilled in the art to which the invention pertains, after understanding my invention, that various changes and modifications may be made therein without departing from the spirit and scope of my invention, as delined by the claims appended thereto.
What is claimed as new and desired to be secured by Letters Patent is:
1. A lock-switch assembly comprising a bolt housing having a bolt moveable therein between a iirst position lying wholly within said housing and a second position projecting out from said housing, an anchor member, means for securing said anchor member to the surface of a closure member, said means being exposed on a given surface of said anchor member, means mounting said bolt housing to said anchor member to cover its said given surface and said securing means, said mounting means including spring means arranged to permit limited relative movement between said bolt housing and said anchor member in response to prying forces in excess of a given amount and a switch mounted and connected between said anchor member and said housing to be operated by movements of said bolt housing with respect to said anchor member.
2. A lock-switch assembly as in claim v1 wherein said switch is positioned within a recess in said anchor member.
3. A lock-switch assembly as in claim 2 wherein said recess opens onto an anchor member surface which becomes covered by the assembly of said closure member surface, said anchor member and said bolt housing.
4. A lock-switch assembly as in claim 1 wherein said switch includes a switcharm which is resiliently biased up against said bolt housing in assembly.
5. A lock-switch assembly as in claim 1 wherein said bolt housing is a solid block of metal of generally rectangular configuration and wherein said anchor member is also a solid block of metal formed with a corner recess for accommodating said bolt housing in ilush mounted relationship.
6. A lock-switch assembly as in claim 1 wherein said anchor member and said bolt housing are loosely bolted together with a bolt extending loosely through the one and threaded into the other and a coil spring surrounding said bolt and extending between its head and said one.
7. A lock-alarm device comprising an anchor plate constructed to be secured to a closure member, securing means exposed on a given surface of said anchor plate for securing same to said closure member, an outer casing, means mounting said outer casing to said anchor plate to cover said given surface and said securing means in a manner allowing limited movement of said casing up from said plate, said mounting means including spring means arranged to resist such movement of said casing, a lock bolt mounted in said casing to move between retracted and projected positions, electrical switching means positioned inside said casing and spring biased to an operation condition, and latching means within said casing for holding said switching means in inoperative condition against said spring bias, said latching means being releasable upon upward movement of said casing with respect to said anchor plate.
8. A lock-alarm device comprising an anchor plate constructed to be secured to a closure member, securing means exposed on a given surface of said anchor plate for securing same to said closure member, and outer casing, means mounting said outer casing to said anchor plate to cover said given surface and said securing means in a manner allowing limited movement of said casing with respect to said plate, said mounting means including spring means arranged to resist movement of said casing away from said plate, a locking bolt mounted in said casing to move between retracted and projected positions, electrical switching means carried lby said casing, resilient biasing means carried by said casing `and urging said switch means to an operative condition and latching means operating between said switch means and said anchor plate to hold said switch means against the action of said resilient biasing means while said outer casing is down against said anchor plate and to release said switch means when said casing undergoes said limited movement.
9. A lock-alarm device comprising an anchor plate constructed to be secured to a closure member, an outer ca'sing, means mounting said outer casing to said anchor plate in a manner allowing limited movement of said casing with respect to said plate, said mounting means including spring means arranged to resist movement of said casing away from said plate, a locking bolt mounted in said casing to move between retracted and projected positions, electrical switching means carried by said casing, resilient biasing means carried by said casing and urging said switch means to an operative condition and latching means operating between said switch means and said anchor plate to hold said switch means against the action of said resilient biasing means while said outer casing is down against said anchor plate and to release said switch means when said casing undergoes said limited movement, said Ibolt being provided with cam means en\ gageable with said switch means to retract said switch means against said resilient biasing means to an inoperative condition and to effect reengagernent ot' said latching means up retraction of said bolt.
10. A lock-alarm device comprising an anchor plate constructed to be secured to a closure member, an outer casing, means mounting said outer casing to said anchor plate in a manner allowing limited movement of said casing with respect to said plate, said mounting means including spring means arranged to resist movement of said casing away from said plate, a locking bolt mounted in said casing to move between retracted and projected positions, electrical switching means carried by said casing, resilient biasing means carried by said casing and urging said switch means to an operative condition and latching means operating between said switch means and said anchor plate to hold said switch means against the action of said resilient biasing means while said outer casing is down against said anchor plate and to release said switch means when said casing undergoes said limited movement, said switching means comprising a switch member mounted for limited reciprocal movement within said outer casing, said switching means further including a iirst switch contact carried by said member and a second switch contact carrier by said casing, said switch contacts being arranged to touch upon movement of said member `by its resilient bias.
11. A lock-alarm device as in claim 10 wherein said switch member is a battery clip.
12. A lock-alarm device as in claim 11 wherein said outer casing includes an electrical alarm connected in circuit with said battery clip and said switching means.
13. A lock-alarm device as in claim 1 wherein said latching means comprises a lug extending up from said anchor plate to engage said battery clip.
14. A lock-alarm device as in claim 13 wherein said lug is spring biased to an upward position and is movable downwardly under pressure from said battery clip after it has passed over said lug.
15. A lock-alarm device as in claim 9 wherein said bolt is mounted on a plug which ts closely in a bore through said outer casing and wherein said plug is formed with a cam surface which engages said battery clip to urge it against and resilient bias upon retractive movement of said bolt.
16. A lock-alarm device as in claim 1S wherein said bolt and plug are spring biased to a retracted position.
17. A lock-alarm device as in claim 16 and further including key releasable latching means to hold said bolt projected against the action of its spring bias.
References Cited UNITED STATES PATENTS 2,756,300 7/ 1956 Thiberville 20G-61.67
ROBERT K. SCHAEF'ER, Primary Examiner H. I. HOHAUSER, Assistant Examiner U.S. C1. XJR.
ZOO-61.81; 340-274; --90