|Publication number||US2124936 A|
|Publication date||Jul 26, 1938|
|Filing date||Mar 28, 1938|
|Priority date||Mar 28, 1938|
|Publication number||US 2124936 A, US 2124936A, US-A-2124936, US2124936 A, US2124936A|
|Inventors||Wehrs Harry A W|
|Original Assignee||Wehrs Harry A W|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (9), Classifications (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Jul 26, 1938. H. A. w. war-ms 2,124,936
' ELECTRICALLY CONTROLLED LOCK Filed March 2a, 1958 p s Sheets-Sheet .1
' 65- .69169) 4.1% A f/ P5 ATTORNEY Jul 26, 1938.
Filed Harch 28, 1958 H. A. W. WEHRS ELECTRIGALLY CONTROLLED LOCK 5 Sheets-Sheet 2 av wag iguvzmoa ATTORNEY July'26,1938. H. A. w. wEHR's I -2,124,936
ELECTRICALLY CONTROLLED'LOCK Filed March 28, 19s s Sheets-Sheet s #4PW4W/1/F/f PS INVENTOR ATTORNEY Patented July 26, 1938 e i UNITED STATES rATENT OFFICE ELECTRICALLY CONTROLLED LOCK Harry A. W. Wehrs, Bangor, Wis.
Application March 28, 1938, Serial No. 198,559
8 Claims. (01. 70-441) The object of the invention is to provide a lock the manual retractionof the latch when the bolt for use on doors and similar closures by means is in such a position to permit this. The bolt M of which the releasing operation is accomplished has a slide mounting in guides I! carried in the by the actuation in a predetermined sequence of case l8 and the fingerpiece extends through a a plurality of switches controlling locking or clearance slot 119 in the wall of the case. The 5 latching members; to provide a lock of the kind bolt may occupy either of two positions in its indicated in which a latch member is included guides, in one of which the closed end of the as an element so that upon the releasing operabore abuts the stem of the fingerpiece and pretion the latch may be thereafter actuated to reeludes movement of the latch and in the other 10 lease the closure; and generally to provide an of which the latch is free to move the length 10 electrically controlled lock of such construction of the slot l9 against the pressure of the spring that the elements may be readily reduced in l5. Thestem of the fingerpiece is angular as number or increased in number to simplify or shown, and the spring l5 surrounds a part of the complicate the releasing operation. stem and is compressed between the end of the With this object in view, the invention consists latch and an abutment collarZll fixed in the bore 15 in a construction and combination of parts of of the bolt. If desired, manual operation of the which a preferred embodiment is illustrated in latch from either side may be provided by exthe accompanying drawings but to which the intending a fingerpiece similar to the fingerpiece I6 vention is not to be restricted. Practical applithrough an opposite side of the casing, so that cation may dictate certain changes or alterations there may be one on either side of the jamb or 20 and the right is claimed to make any which fall frame in which the lock is mounted.
within the spirit of the invention. The belt I4 is yieldingly impelled into release In the drawings: position for the latch, being provided at the Figure 1 is a horizontal sectional view on an end remote from the latch with a stem 2| which enlarged scale of the improved lock, the wiring passes through a guide bracket 22 and through 25 in certain of the parts being diagrammatically the wall of the case l8, terminating in a head indicated. 23. Between a collar 24 and-the bracket plate Figure 2 is an enlarged sectional view of that 22, the stem is surrounded by a compression portion of the construction including the latch spring 25 and when the bolt is in a position to 20 member. prevent latch retraction, the spring is com- Figure 3 is a sectional view on the plane inpressed. The head 23 of the stem serves as a (h y the line 33 of Figure 2. fingerpiece bymeans of which the bolt is moved Figure 4 is an enlarged sectional view of the into latch holding position in which it is retained cooperating ends of the bolt and 'bolt control by a series of'pawls 26, 21, 28, 29 and 30, the pawls bar. p p 26 to 29 inclusive being spring impelled toward 35 Fi ur 5 is a sectional vi w n the p n nthe bolt but the pawl 30 being without a spring, Cheat d by the line 0f Figure so that it will maintain either of the twopositions Figure 6 is a Sectional View 011 the plane in which it is set. Engagement of the pawls with (heated by the e Figure the bolt is by means of seats formed in the latter Figure s a Sectional View Of One Of the double resulting from notching the same but the spacing 40 p Switches Comprised in the complement of of successive seats is progressively increased Sw tc esi while the spacing of the pawls is uniform. Thus,
While the invention, in the proportioning of its when t pawl 25 is engaged, th remaining parts y h eohstrueted meuntihg either pawls, except pawl 30, while in their respective .5 the door in t l b, t is illustrated in the notches, are spaced from the abutment ends. present embodiment as being carried in t lamb, This, so that when the pawl 26 is released, the So that the latch Ni may enter the socket I I in the bolt will be withdrawn until the pawl 2'! engages door I2 when the latter is in closed position, the th but t end f its notch and when it is latc av g the custemely ev l n e 13 released the pawl 28 engages the abutment end depress it into its socket as the door moves to of its slot and so on. 50
closed position. The latch it] has a sliding 1 The pawls are all pivotally mounted in the case mounting in the bolt M in a socket formed in the and the retraction of the pawl 26 is accomplished latter and which houses a spring i5 yieldingly by energizing the magnet 3|. The magnet 32 impelling the latch to expose the nose end thereperforms a similar function for the pawl 27, the of, a fingerpiece It being exteriorly exposedfor magnet 33 for the pawl 28 and the magnet 34 '55 for the pawl 29. The pawl 30 is normally disengaged from its seat in the bolt l4 and is moved into engagement with its seat by energizing the magnet 35. Release of the pawl 30 from its seat is effected by movement of the bolt control bar 36 which is spring impelled in one direction through the instrumentality of a spring 31 surrounding a stem 38 on the bar and compressed between a collar 39 on the bar and a bracket plate 40 through which the stem slidably passes. The bolt control bar 36 is mounted in guides 4| carried in the casing and is provided with a fingerpiece 42 which extends through a slot 43 in the wall of the casing. The purpose of the fingerpiece is to move the control bar in a direction opposite to that in which it is moved with the spring.
The bolt control bar is retained in a position intermediately between its two extreme positions through the instrumentality of pawls 44, 45, 46 and 4'! which are pivotally mounted and spring impelled toward'the 'control bar toengagein seats in the latter similar to seats formed in the bolt. These seats are provided by not'ching the barand progressively spacing the distance betweensuccessive notches, so that with uniformly spaced pawls, the bolt control bar may be released by successively retracting the pawls, al.- lowing it to recede in short steps until it "is' finally entirely retractedwhen the pawl 41 is released.
The pawls 44 to 41 inclusive'are successively retracted by successively energizing the "magnets 48,49, 50and'5l.
The bolt control bar is provided with a stem '52 terminating in a yoke 53 which extends around the ends of a finger 54 projecting laterally from a pull-rod 55 connected with the pawl 30 at the tail of the latter. The pull-Tod 55' extends through the'wall of the case and terminates in a head 56 and interior to the case is provided with a collar :51 for cooperation with a fork later described.
With the bolt control bar in its intermediate position or that in which it is retained by the pawl 44 when the latter is engaged with its seat, the stem side of the yoke '53 abuts the finger 54, so that if the control bar is moved further than this position, as it may bewhen the magnet 58 is energized, the pawl 30 will be moved into seat engaging position, when the finger 54 will abut the opposite vside' of the yoke 7 when the bar returns .to its intermediate position, or that in which it is retained by the pawl 44. When the pawl 30 is in bolt engaging position, the release of the control bar willthen result in a pull against the finger 54min an opposite direction than previously with the result that the pawl 30 will be retracted from itsbolt engaging position. 3
Each of the pawls, except the pawl 41., is operatively connected with a circuit closer of which each is in the form of a longitudinally movable 7 bar with alternate insulating and conducting zones. Movement of the bars as a result of pawl movement thus effects a switching operation and the bars in effect are switches and. hereinafter are so referred to. There are thus provided the single-pole double-throw switches 59., 6D, 6!, '62, '63 and 64, the single-pole single-throw switch 65 and the double-throw switch 65, which is single .pole in one position and double pole in the other.
The fork '61 which is. the fork cooperating with the collar 51 is mounted within the caseand slides in a guide '38, being shifted into and out of obstructing position with respect to the collar through the medium of a hand knob 59.
The circuits of the several magnets above referred to are controlled by the switches Ill, H, 12, 13, l4, l and 16 of which all but switches 13 and 15 are single-pole, these two' latter switches being double-pole. Blind switches 11 and 18 are provided to complicate the system to make it more difficult for one not acquainted with the sequence of operation of the switches to release the lock. The operation of either the switches H or 78 will effect bolt engaging operation of the pawl 30 at the wrong instance so that bolt release cannot thereafter be effected Exteriorly, all of the switches, to 13 inclusive, appear the same but they are prorniscuously arranged so that their sequence of position will be at variance with their sequence of operation.
In operation, when the door [2 is closed and engaged by the latch [0, the latch is secured against retraction when the bolt [4 is in the forward position where the pawls 26.; 21,, 28 and 29 engage in their seats, as shown in Figure l of the drawings. The pawl 30, however, is in retracted or disengaged position. The latches 44 to 41., however, engage in their seats in the control "bar in which position the upper side of the yoke 53 engages the finger 54 of the pull-rod 55- 'To release the bolt, the switches ll] to 16 inclusive must be operated in a certain sequence but in order that they may operate, the main control switch 19 must first be closed, this being a' switch in one side of the main line conductor 80. With the switch 19 closed, if the switch 12 be first depressed, it will close the circuit on the magnet 31, current flowing over the conrductor '80 to the switch 65 which is in closed position when the pawl 30 is retracted, then over the'conductor Bl to the switch 12, then over the conductor 82 to the magnet 3|, then over the conductor 83 through onepole of the switch 66 which is in closed position on the double-pole side, then over the conductor 84 to the return line 85. The pawl 26 will then be retracted and the bolt will move-back a small distance until the pawl 21 engages the abutment face of its notch. Then the magnet 32 must be energized to effect release of the pawl 21 and this .is-accomplished by actuation of the switch 10, depressing which results inthe flow of current over the conductor 80, switch 65 and conductor 8.! as before, then through the switch 10, then over the conductor 86, then through the switch 66 which, by previous movement of the pawl .26, releases the switch from the double-pole side and closes it on the single-pole 'side. From the switch -55, current fiows over the .conductor 81 to the magnet 32 and thence cover the conductor 8.8 to the return side of the line 85. The pawl 21 is then retracted and the bolt 14 drops back until further .movement is arrested by the pawl 28 to release which the magnet 33 must be energized. This is accomplished by actuation of the switch 14, current passing as before to the conductortl and thence through the switch 14 to the conductor 89, thence through the switch 64 which, by the movement of the pawl 21, .has been shifted to closed circuit position for this conductor. From the switch 64 current passes over the conductor 90 through the magnet 33 and over the. conductor 91 to the return line 85. The ,pawl 28 is then retracted and the bolt drops back a further increment until it is arrested by the pawl 29. But the release of this pawl is not the next step in the series of operation. The pawl this is done by energizing the magnet 35 which without the return of all parts to normal position.
is accomplished by the actuation of the switch II. Current which reaches the conductor BI as previously described, passes-through the switch II, over the conductor 92, through the switch 63 which, by movement of the pawl 28, has been moved into circuit closing position for this conductor. Thence current passes over the conductor 93 to the magnet 35 and thence to the return conductor 85. The pawl 30 is then moved into bolt engaging position and its associated switch 65 is shifted to open position, so that when the pawl 29 is released thebolt I4 will be arrested by the pawl 30 but it recedes a small amount to engage the pawl 30 after the release of the pawl 29 to prevent reengagement of the latter pawl with its seat after the magnet 34 is deenergized. To energize the magnet 34 to release the pawl 29 the switch I3 is operated. This is a double-pole switch but in this instance its circuit closing function is performed only on one side, current passing'over theconductor through the conductor 94, thence through the switch 62 which with the pawl 29 engaged is in circuit closing position for this conductor, thence over the conductor 95 to one pole of the switch I3, thence, over the conductor 96, the conductor 91, the magnet 34 and the conductor 98 to the return conductor 85. The pawl 29 is thus retracted but, as before explained, the movement of the bolt beyond a small increment is arrested by the pawl 30.
The next series of operations calls for the successive release of the pawls 44 to 41 inclusive of the control bar 36. To release the pawl 44, the magnet 48 must be energized and this is done by the operation of the switch I5 which is also a double-pole switch, current flowing, when this switch is depressed, over the conductor 80 to the conductor 99, thence overthe switch 62 which, by reason of the shift-over effected by movement of the pawl 29, is in circuit closing position for this conductor. From the switch 62 current flows over the conductor I00, the conductor IOI, one side of the switch I5, the conductor I02, the magnet 48 and thence to the return conductor 85. The pawl 44 is thus released and the control bar 36 recedes until it is arrested by the pawl 45, to release which the magnet 49 is energized. This is accomplished by actuation of the switch 13. In this operation, the opposite pole than that previously active carries out the circuit closing function, current which reaches the conductor IOI in the same manner as previously described passing over the conductor I03 and through the switch 6I to the magnet 49, this switch being moved into circuit closing position for the magnet by the retraction of the pawl 44. Leaving the magnet 49 current passes over the conductor I04, at one pole of the switch I3, the conductor I05 and the conductor I09 to the return conductor'85.
The next step-is toenergize the magnet 50 to efiect retraction of the pawl 46 which at this instance is restraining the control bar 36. Depression of the switch I6 results in closing the circuit on the magnet 50, the switch 60 having been moved into circuit closing position for this purpose by the retraction of the pawl 45. Current reaching the conductor I00 as previously described, passes over the conductor I0I to the switch I6, thence over the conductor I08 tothe magnet 50, thence through the switch 60 over the conductor I09 to the conductor I06 and thence to the return conductor 85. The pawl 46 is thus withdrawn from its seat in the control bar and the latter moves a small distance until it is arrested by the pawl 41 to retract which the magnet 5| must be energized. The switch I5 is closed for this purpose, the switch 59 having been moved into circuit closing position for the magnet 5! upon retraction of the pawl 46. When the switch I5 is depressed under these conditions, current flows over the conductor I00 to the opposite pole than that which was active in the previous operation, thence over the conductor IIO, the switch 59, the magnet 5I and the conductor I06 back to the return conductor 85. 3! left free to retract the control bar 36 its full distance, when the yoke engages the finger 54 and effects retraction of the pawl 30 from the bolt I4, leaving the spring 24 of the bolt free to retract the latter when the latch is free to be released by finger movement applied through the knob I6.
It will be noted that theseries of operations is carried out through the instrumentality of serially connected switches, a pawl actuated switch cooperating with a finger or hand actuated switch, so that both must be in their proper positions in order for the hand actuated switch to operate.
Assume that the switches were not actuated in proper sequence, then a pawl controlled switch would be in open circuit position and the magnet associated with the particular hand controlled switch could not be operated. For example, suppose that the switch I2 were first operated which, in the particular arrangement shown, is the first in the sequence of operations. This would result in withdrawing the pawl 26 from the bolt. But suppose the switch II were next operated. This could not energize its associated magnet 35 because the circuit on that magnet would be open by reason of the position of the switch 63. But the magnet 35 could be energized by depression either of the switch IT or the switch I8. If the former, current would flow over the conductor M to the switch 11, thence over the conductor I I I from which it would pass to the conductor II2 through either the switches 53, 64 or 66, depending on whether any or all of the pawls 26, 2! and 28 are in bolt engaging position. Any of these three pawls in bolt engaging position would have its operatively connected switch in position to close the circuit between the conductors III and H2 through the conductors H3, H4 or H5. Any current flowing in the conductor The pawl 47 is then retracted and the spring I I2 would pass through the magnet 58 and thence to the return conductor through the conductor I I6. Energizing the magnet 58, however, results in movement being imparted to the control bar in a direction to apply a pressure upon the finger 54 to move the pawl 39 into bolt engaging position. When this is done, the switch 65 is moved into open circuit position and if either of the pawls 26, 2I or 28 is engaged with the bolt at that time, magnetic release of such pawl will be precluded, since the switch 65 controls circuit continuity between the conductors and BI. With any or all of the pawls 44, 45 and 46 engaged in their seats in the control bar 39, the switches 6|, 60 and 59 are in circuit closing position through the conductors I I1, I I8 and H9 to place the conductor I20 in circuit with the conductor I2I, so that if the switch I8 be closed, the magnet 56 will be energized either by current flowing from the conductor I01 through the switch I8 to the conductor I20 and thence over the conductor I2I to the magnet 58 or from the conductor 8| to the conductor I20, depending on the positions of pawls 29 and 30, since the bolt releasing position of the pawl 29 will deter mine'whether current can reach the switch over the conductor I00 and the similar position of the pawl'30 will determine whether it can reach the switch over the conductor 8|. the control bar are notreleased in proper sequence the control bar will not be released and if the switch 18 be actuated, any pawls that have been previously released will be returned to control bar engaging position because the energization of the magnet 58 will impart movement to the control bar to effect this as well as to shift the pawl 32 into bolt retaining position.
To provide for quick operation of the bolt by someone from the inside of the protected enclosure, a multi-pole switch I22 is provided, all of the poles of this switch being connected together to the line 80 but the other poles being connected to the conductors I23, I24, I25 and I26 which lead respectively to the magnets 3!, 32, 33 and 34. Closing the switch will result.
in current flowing simultaneously to these sev eral magnets thus effecting retraction of all of the pawls so that the bolt may be retracted by its spring.
The fork 61' is of a form to adapt it to engage on'either side of the collar 51. 'In one position, it is free of the collar and the pull-rod 55 may be moved in either direction to engage the pawl 30 with the bolt or disengage it therefrom. When the pawl is engaged with the bolt, the fork may be shifted intoa position to overlap the collar 51 on one side, so that'the pawl cannot then be retracted. When the pawl is disengaged, the fork may be shifted to engage the collar 51 on the other side to prevent engagement of the pawl with the bolt. By this arrangement the pawl 3E! .may beren'dered operative to limit the operation of the mechanism to release pawls 26 to 29 inclusive. Or the fork may be employed to lock the pawl in'the bolt so that the whole apparatus is rendered inoperative so far as release by the switches 10 to 16 is concerned.
The invention having been described,.what is claimed as new and useful is:
1. A lock having a bolt, a spring yieldingly impelling the bolt from bolting position, a plurality of pawls yieldingly impelled toward the bolt and engaging seats in the latter to retain the bolt in bolting position, electrically actuated retracting means for each of said pawls, and a plurality of switches individually controlling the electrically actuated retracting means and having their sequence of operation at variance with their sequence of position.
2. A look having a bolt, a spring yieldingly impelling the bolt from bolting position, a plurality of pawls yieldingly impelled toward the bolt and engaging seats in the latter to retain the bolt in bolting position, electrically actuated retracting means for each of said'pawls, a'plurality of manual switches for controlling the actuation of said retracting means, and a plurality of pawl actuated switches also. controlling said retracting means and coordinated with the manual switches. V
3. A lock having a bolt, a spring yieldingly impelling the bolt from bolting position, .a plurality of pawls yieldingly impelled toward the bolt and engaging seats in the latter to retain the bolt in bolting position, electrically actuated retracting means for each of said pawls, a plurality of manual switches for controlling the actuation of said retracting means, and a plurality ofpawl actuated switches also controlling said retracting If the pawls of means and coordinated withthe manual switches, the manualswitcheshaving their sequence of operation at variance with their sequence of position. r
4. A look having a bolt, a spring yieldingly impelling the bolt frombolting position, a plurality of pawls yieldinglyimpelled toward the bolt and engagingseats in the latter to retain the bolt in bolting position, the pawls and seats being arranged in series'of which the spacing of the units of one is uniform and the spacing of the other progressively increased, so that bolt retention at any instant is due solely to one pawl, electrically actuated retracting means for each of said pawls, and a plurality of switches individually controlling. the electrically actuated retracting means and having their sequence of operation at variance with their sequence of position.
5. A look having a bolt, a spring yieldingly impelling the bolt from bolting position, a plurality'of pawls yieldingly impelled toward the bolt and engaging seats in the latter to retain the bolt in bolting position, the pawls and seats being arranged in series of which the spacing of the units of one is uniform and the spacing of the other progressively increased, so that bolt retention at any instant is due solely to one pawl, electrically actuated retracting means for each of said pawls, a'plurality of manually actuated switches individually controlling the electrically actuated retracting means and having their sequence of operation" at variance with their sequence of. position, and a pluralityof pawl actuated switches coordinated with the manual switches to control the retracting 'means jointly with the switches. V H
- 6. A look having a bolt, a spring yieldingly impelling the bolt from boltingposition aplurality of pawls yieldingly impelled toward the bolt and engaging seats in the latter to retain the bolt in bolting position, an additional pawl normally disengaged from the bolt but engageable with a seat in the latter, electrically actuated retracting means for the yieldingly impelled pawls, electrical actuating means for said additional pawl, and a plurality of switches individually controlling all of said electrically actuated means and having their sequence of operation at variance with their sequence of position.
7.'A lock having 'a bolt, a spring yieldingly impelling the bolt from bolting position, aplurality of pawls yieldingly impelled toward the bolt and engaging seats in the latter to retain the bolt in bolting position, an additional pawl normally disengaged from the bolt but engageable with a seat in the latter, electrically actuated retracting means for the yieldingly impelled pawls, electrical actuating means for said additional pawl, and a plurality of switches individually controlling allof said electrically actuated means and having their sequence of operation at'variance with their sequence of position, and a pawl retained spring, impelled. control bar provided with electrical releasing means for the pawls,
.and a plurality of manually actuated switches controlling. the last said release means and likewise having their sequence of operation'at variance with their sequence of position, the control bar when'released effecting the release of the said additional pawl when the latter. is in bolt engaging position.
8. A look having a bolt, a spring yieldingly impelling. the bolt from bolting position, a plurality of pawls yieldingly impelled toward the bolt and engaging seats in the latter to retain pawls, and a plurality of manually actuated switches controlling the last said release means and likewise having their sequence of operation at variance with their sequence of position, the
control bar'when released efiecting the release 5 of the said additional pawl when the latter is in bolt engaging position, the said additional pawl being provided with a manual latching means to positively retain it in either bolt engaging position or in a position disengaged from said bolt. 10
HARRY AUG. WM. WEHRS.
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|U.S. Classification||70/141, 70/278.1|