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Publication numberUS1899466 A
Publication typeGrant
Publication dateFeb 28, 1933
Filing dateMar 17, 1932
Priority dateMar 17, 1932
Publication numberUS 1899466 A, US 1899466A, US-A-1899466, US1899466 A, US1899466A
InventorsHerman H Kistner
Original AssigneeHerman H Kistner
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Closure fastening and locking means
US 1899466 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

1933- H. H. KISTNER CLOSURE FASTENING AND LOCKING MEANS 2 Sheets-Sheet 1 Filed March 17, 1952 illlllgj Elma/rm Feb; 28, .1933.

H. H. KISTNER I CLOSURE FASTENING AND LOCKING MEANS 2 Sheets-Sheet 2 Filed March 17, 1952 lrman l /l fllsf'ner,

IIIIIIII V l I 2 I [Il 11%| 1-21 Patented Feb. 28, 1933 UNITED STATES HERMAN H. xIs'rNER. or BALTIMORE, MARYLAND ono'suim FASTENING Ann LOCKING MEANS Application filed. March 17, 1932. Serial No. 599,547.

This invention relates to window sash locks and similar devices and aims generally to provide improved locking means comprising means for bolting members such as window sashes against relative opening movement together with means for drawing such members toward each other in a direction transverse to the direction of relative opening movement thereof to prevent rattling of the same or close the space between such members or achieve both these results, among others appearing hereinafter.

Subsidiary to this general object, my invention further aims to provide improved bolting means, certain features of which may be employed in other relations than those herein particularly described. In addition my invention aims, severally and. interdependently, to improve the details of construction of such subsidiary bolting means, to provide im= proved operating means'therefor, to provide a novel locking means and appurtenances thereto, and to provide anovel association with suitable member drawing means of such subsidiary bolting means and appurtenances.

Other objects and particular advantages of various features and combinations of my invention will be made clearly apparent to those skilled in the art by the following detailed description of preferred embodiments of my invention shown in the accompanying drawings, in which Fig. 1 is a transversesection through the meeting rails of a pair of window sashessecured by a device illustrating my invention, parts of which are shown in section;

Figs. 2 and 3 are sectional views taken upon planes at right angles to the section of Fig.1, respectively at the lines 22 and 33 of Fig. 1, looking in the directions indicated by the arrows thereon;

Fig. 4 is a view similar to Fig. 1 but illustratingthe cooperation of a key with the 45 structure of Fig. 1;

i Fig. 5 is a phantom perspective view of the installation of Figs. 1-4:; i i c Fig. 6 is a disassembly. view of the subsidiary bolting means and operating means therefor which are incorporated in the device so of Figs. 1-5; while 1 i Fig. 7 is a view similar to Fig. 3 showing a sinplified form of subsidiary bolting means; an 1 Fig. 8 is a disassembly view of the barrel '55 and bolt elements of such simplified form of subsidiary bolting means. The embodimentof my invention, an illustrative formof which is shown in Figs. 1 through 6 of the drawings herewith, com- B0 prises a rotary boltsimilar to anysuch bolt commonly used with catch-means for engagement thereby to secure the meeting rails -of closures of any ordinary type, such as sliding sash windows, casement windows or the like, and the form shown to illustrate such device and the association thereof with a conventional closure, comprises a rotary cam bolt 10 provided with a baseor'attaching plate 11 mounted upon the meeting rail =12 of '10 a sliding sash window and a hook-catch, 13 mounted upon the meeting rail 14 of the companion sash of the window.

- This much of my device may be of any desired or conventional form, as my invention resides in other devices of the embodiment shown, the association of such other devices with the rotary bolt means, and such particulars of construction as are employed to effect such association, the respective constructions and associations of which are hereinafter more fully described.

As shown in Figs. 1 through 6, these other devices comprise a projectablebolt which is adapted to be secured in one of the closure members (in the form shown by being driven into a hole formed therein) in position to-be projected to engage with the cooperating closure member; means to interconnect a rotary boltvand a projectable bolt to render one of them capable of controlling the operation of the other; means to lock at least one of the bolts, and preferably the projectable bolt, in engaged position so that unlocking means, shown as a key (see Fig. 4), must be employed to release the bolt when provided with such locking means; means applicable when locking means is provided for the projectable bolt to prevent forcing of the same from locked position if it has exposed means normally utilized to move the same; and means such as a lost motion device to provide, when locking means is associated with a rotarycam-bolt, for drawing movement of said.

cam-bolt within the locked range thereof.

The constructionand operation of these several devices, whichmay be designed in various forms and associated in various com through an opening 18, 18 inthe side of the tubular body 15, 15 In the form shown, the rack 17 extends into the opening 18, 18

. and is secured in a recess 19 in the bolt member 16 (see Figs. 3 and 6) by means of a machine screw 20 extending through the bolt member 16 and having its head countersunk therein, and the tubular body is provided with an opening 21 (Fig. 3) so that the bolt 16 may be slid into the body member and have the rack 17 thereafter attached thereto. With this simple construction the rack 17 not only provides an engageable portion for moving the bolt 16, but by cooperating with the opening 18, 18 provides means for limiting thethrow of the bolt member 16 or preventing'rotation thereof in the body 15 and may serve both these functions, as in the form shown, aswell as other functions hereinafter described. The tubular body, as pointed out hereinafter, in connection with Figs. 7 and 8, need not necessarily be made in two separable parts, but this construction is embodied in the device of Figs. 1 through 6 because it is particularly advantageous in connection with the particular locking means disclosed therein and hereinafter described. *In the illustrative embodiment of my device the side wall at one side of the opening 18 is cut away as indicated at 22, so that the means for operating the bolt 16, hereinafter described, may engage with the rack 17 without its-being necessary to extend the rack beyond the confines of the tubular body 15, so that the rack will not interfere with the driving of the projecting bolt into the closure member 12 in mounting it as shown. In the forms shown the other side of the opening 18 is not cut away, but is left intact to form a seat 23 against which the member for engaging the rack 17 or the like may rest, if desired, and against which premature abutment of such member will indicate failure to properly align the projectable bolt assembly in inserting the same, when the elements of the deviceare provided and inserted separately, as shown.

The interconnecting meansof this embodiment for enabling the rotary bolt 10 and the projectable bolt 15-16 to mutually control each others operation is best shown in Figs. 3 and 6 of the drawings and comprises means such as the axiallyextending shaft 25 secured at its end portion 26 to rotate with the rotary bolt member 10 in any suitable manner as by riveting it in place in a sleeve 27 secured to therotary member 10 and rotatably attaching the same to the base or mounting plate 11,-as shown in Figs. 1 through 5. In Fig. 61 have shown the end portion 26 screw threaded, a construction which may be employed if it is desired to secure the interconnecting means to an existing peculiar rotary bolt by drilling the latter and employing a nut and lock washer to effect the connection. This screw threaded construction is also advantageous for the attachment of a simple operating handle if it is desired to use the projectable bolt and its operating means without correlating it with a rotary bolt. At its extended end, which projects beyond the attachingface of the mounting plate 11, the axial shaft 25, in the form shown. carries suitable engaging means, such as the pinion 28. to cooperatewith the rack 17 or other cooperating engageable means on the bolt 16, to d rive the latter as the shaft 25 is rotated. Inthe form shown, in which the projectable bolt assembly is separate from the rotary bolt and axial shaft assembly. the parts are assembled in proper ,rela.

tion bv drilling accurately positioned holes in the closure'member 12, as shown, and inserting the parts therein, and to prevent loosening of the shaft 25 after use, or springing of the pinion 28 out of engagement with the rack 17 a bearing sleeve 29 is loosely mounted on the shaft 25 to tightly fit and line the hole into which the shaft and sleeve are inserted. When applying the rotary bolt 10 and interconnecting means 11 as a complete assembly, as indicated in Figs.

1-5, if friction of the sleeve 29 in the hole causes it to bear against a rotary'portion of the rotary bolt assembly, as the lower end of the flanged sleeve 27 ,and cause stiffness of operation, this may be remedied by lightly tapping with a hammer such partof the device as will apply force to the bearing sleeve 29 to drive the same slightly into the hole. In the form shown the end 26, sleeve 27 or an adjacent portion of the base 11 may be tapped to loosen the engagement of the sleeve 29 with the lower flange of the sleeve 27.

As aforementioned, the. device of'Figs. 1 through 5 and the subsidiary shown in Fig. 6, comprises means to lock at least one of the bolts, and preferably the projectable' bolt, in engaged position so that unlocking means must be employed to effect release offthe same. In the form shown, this locking means (illustrated in Figs. 1, 4 and 6) is provided by forming a transverse bore 30 inthe bolt member 16 and mounting therein a detent 31 urged outwardly by means such as a coil spring 32, to engage with an inwardly opening detent socket '33'formed in the tubular body 15. In the form shown, this locking means 3033 directly locks the projectable bolt 16 in engaged position, and indirectly, by virtue of the interconnecting means 2529 locks the rotary bolt '10 in engaged position.

Within the broad purview ofmy'invention, any suitable means may be provided for displacing the locking means or detent 31.;but for the sake of simplicity I prefer to provide for direct operation thereof by a detent depressing member, and accordingly provide an opening for the insertion of such a member leading into the detent socket 33. In the illustrative embodiment of my invention this opening is shown as a longitudinal groove 34 (see Figs. 1, 4 and 6) formed in the tubular body 1515 and extending into the detent socket 33. In the construction shown, to insure a clear key channel andavoid the projection of wood fibres from the member 12 into the detent socket. 33 and groove 34, the outer sides thereof are closed, the closure being effected, for simplicity of manufacture, by the separate'sleeve or shell 15. By the use of these separate parts the socket 33 and groove 34 may be formed to extend entirely through the member 15, as best shown in Fig. 6. and in addition, the shell 15 may be readily formed with a flanged end face 35 to lie flush with the clossure member 11 and give a finished appearance to the installation as indicated in Fig. 5. This flanged face 35, as shown, may be provided with slots 36 aligned with the key channel34 and as many cooperating guide chan nels 34- as desired to cooperate with the key, and these slots will be maintainedin alignment by any suitable means, which, in the form shown comprises the edges of the opening 18 engaging with the sides of the rackmember 17.

If the projectable bolt assembly of Figs. 1 through 6 should turn about its axis during insertion thereof in the closure member 12,

the grooves 34, 34, slots 36, 36 and relatively large central opening in the end face of the member 15 enable a turning tool with lateral projections to be inserted through the face plate to engage the grooves 3434 to turn themember until the rack 17 or other for engagement.

engageable-element is properly positioned i In case such grooves are notIprovided-(as in the simplified form of my invention shown in 'Figs. 7 and 8, in which the locking means-is omitted and in which parts similar to. those of the comprehensive embodiment'of my invention are indicated by similar, but primed, reference numerals) the pro'visionof an orifice 34 (Fig. 8) located to be covered by the member 12 upon full 7 insertion of the p'ro'jectable: bolt assembly, may be used to .enable the assemblyto be inserted to. a considerable extent and thenbe aligned by theapplication of a turningtool to the orifice 349 v before theassembly is completely driven home. I If desired the end of the "slot 18 at'34,('see Fig. 8) maybe used for this purpose."

Whenlocking means'is associated with a operating the same,- such as ahandle or the handle of the rotary'bo'lt 10 in the form shown, my invention contemplates the provision of' means to insure against forcing of the bolt from locked position, a-nd'oneor more suchmeans may be provided, in the forms shown in Figs. 1 through 6, preferably 'by rendering. one or more portions of the-operating means for the bolt 16 less resistant to forcing than the detent 31; Such less 'rer projectable bolt having exposed means for L335 28 will provide for stripping of these teeth before shearing of the: pin 31, ortheIprovision of a frictional connection of the, pinion 28 to the shaft 25 as shown, if not of excessive tightness, will enable slippage at such connection beforeshearing of the pin 31. My

invention contemplates the use of frangible or slippable connections, or both, in this regard, and when employing both, I prefer to make the slippable connection of a character intended to yield before the frangible connection, so that the parts can be forced back-to original position after an attempt to force the lock, the'frangible connection being a safety assuring feature in the event. of failure of the slippable connection to yield as intended.

As an additional safetyfeature, when the lock is applied to a closure such as a window sash I provide a socket liner 40, hardened at least at its closed end, to prevent access being obtained to thebolt member 16 by drilling through from the exterior of the member 14. This liner 40 is preferably deep enough to provide aclearance space 41 beyond the end of the bolt-member 16, when the latter is projected, at least suiiicient to provide for abutment of the liner 40 against the body 15 before the liner will contact theibolt-member '16, so that the liner 40 cannot be driven against the bolt-member 16 to drive the latter a further precaution the liner 40 may be provided with a laterally extending continuous flange or lugs indicated at 42', Fig. 7, to abut the closure member 11 and entirely prevent driving out of the assembly.

In the illustrative embodiment of my invention in which the locking means is associated with a rotary cam bolt used to draw the closure members into mutually'engaging or non-rattlingposition, a lost motion device or arrangement to enable drawing movement of the cam-bolt within the locked range thereof is provided, and for simplicity such device is preferably embodied by arranging for continued movement of the'parts after the detent 31 enters the detent socket 33. In the form shown, in which the detent ismaintained in alignment with the key opening because of the guidance of the rack 17 in the opening 18, 18, this is very simply accomplished, merely by drilling the detent socket 33' sufliciently larger in diameter than the detent 31, as shown, to enable such additional rotation of the rotarycam-bolt as is desired. As shown in the drawings my invention provides a secure projectable fastener entirely invisible from the exterior of a window to which it may be applied, and the inner end face 35 of which, when exposed as shown, lies flush with the surface of the member to which it is applied. In addition, my invention provides for entry of the projectable bolt-member 16 into the body proper of the cooperating closure member 1 1, as distinguished from entry into a member merely screwed thereon, which might easily be pulled off the closure member by jimmying the closure. Thus my invention in the forms disclosed prevents jimmying of theclosure or so called slicing thereof (i. e. disengagement of the fastening by a blade slipped between the closures), and in forms such as that of Figs. 1 through 6,prevents unlocking of the closures even if a hand-hole be cut through the closure. 7

lVith the double-fastening device of my invention applied to cooperating closure members as shown, mere closure of the members and turning of the rotary bolt in the usual way effects the usual fastening of the members and in addition effects entry of the projectable bolt into the body proper of the member with which it engages, while at the same time, in thevform shown in Figs. 1 through 6, the locking means provided automatically comes into play to prevent unfastening of the closures. To unlock the device of Figs. 1 through 6 it is only necessary, as indicated in' Fig. 4, to insert the wedgeshaped key 45 to depress the detent and enable unfastening of the bolts by theusual manipulation of the rotary bolt while the key is in place. 1

It is ofcourse clear that the several features. and combinations ofmy invention may be embodied 'in other forms than those dis- 7 closed to illustrate thev same, and that the specific embodiments particularly described herein are to be considered merely illustrative and notrestrictive of my invention.

' I claim as my invention 1. A sash-lock comprising a tubular body havingan internally open detent socket and an opening leading thereto, a bolt member and means for sliding the same in said tubular body to retracted and projected positions, a transverse bore in said bolt member, a detent pin slidable in said bore, a spring arranged to urge said pin to a position extending into said socket, said sash lock being adapted to bereleased by unlocking means shaped to enter said opening in said tubular bodyand to depress said pin to a position to disengage the same from said socket.

' 2. A sash-lock comprising a tubular body having an internally open detent socket and a longitudinal key groove extending into said socket, a bolt member and means for sliding the same in said tubular body to retracted and projected positions, a transverse bore in said bolt, a detent pin slidable in said bore, a spring arranged to urge said pin to a position extending into said socket, said sash lock being adapted to be released by unlocking 'means shaped to slide in said longitudinal groove in said tubular body and to depress said pin to a position to disengage the-same from said socket.

3. Asashdock comprising a tubular body having an internally open detent socket and an opening leading thereto, a bolt member and means for sliding the same in said tubular body to retracted and projected positions, a transverse bore in said bolt, a detent pin slidable in said bore, a spring arranged to urge said pin to a position extending into said socket, said sash lock being adapted to be released by unlocking means shaped to enter said opening in said tubular body and to depress said pin to a position to dis-engage the same from said socket, said bolt sliding means including a connection less resistant toforcing-than sald detent pin to prevent forcing of said bolt when said detent pin is engaged in said socket.

4. Asash-lock comprising a body member,

a bolting member slidable therein to retracted vand projected positions, means for sliding said bolting member, means for locking said bolting member in projected position, said sash lock being adapted to be releasedby means for unlocking said bolt lockingmeans, said bolt sliding means including a connection less resistant to forcing than said bolt-locking means to prevent forcing of said bolt when locked.

5. In combination, a rotary cam bolt of the window-fastening type and means for locking the same in engaged position, said locking means being arranged to provide lost motion to enable member drawing movement of the cam bolt within the locked range thereof.

r 6. In combination, closure fastening means comprising a rotary-bolt of the windowfastening type and catch-means for engage ment thereby, a projectable-bolt adapted to be mounted in the closure member upon which said rotary-bolt is to be mounted and to be projectable to'a position engaging the closure member-with which said catch-means is to be associated and means to connect said rotary bolt and projectable-bolt for simultaneous operation. 1 r

-7. In combination, closure locking means comprising arotary-bolt of the window-fastening type and catch means for engagement thereby, a projectable bolt adapted to be mounted in the closure member upon which said rotary-bolt is to' be mounted and to be projectable to a position engaging the closure member with which said catch-means is to be associated, means to connect said rotary-bolt and projectable bolt for simultaneous operation, and means to lock one of said bolts in engaged position.

8. In combination, closure locking means comprising a rotary-bolt of the window-fastening type and catch-means for engagement thereby, a projectable bolt: adaptedto be mounted in the closure member upon which said rotary-bolt is to be mounted and to be projectable to a position engaging the closure member with which said catch means is tobe associated, means to connect said rotary-bolt and projectable boltfor simultaneous opera tion, and means to lock said projectable-bol in engaged position.

9. In combination, closure locking means comprising a rotary-bolt of the window-fastening type and catch-means for engagement thereby, a projectable bolt adapted to be mounted in the closure member upon which said rotary-bolt is to be mounted and to be projectable to a position engaging the closure member with which said catch-means is to be associated, means to connect said rotarybolt and projectable bolt for simultaneous operation, and means to lock said projectable bolt in engaged position more resistant to forcing than the means connecting said bolt for simultaneous operation to prevent forcingof said projectable bolt by stress applied to said rotary-bolt.

10. In combination, closure fastening means comprising a rotary-bolt of the win dow-fastening type and catch-means for en-' gagement thereby, atubular body provided with a side-opening and adapted to be mounted in a hole formed in the closure member upon which said rotary-bolt is to be mounted, a projectable bolt-member movably mounted in said tubular body and'projectable to engage the closure member with which said I catch-means is to be associated and provided with an engageable portion exposed through said side opening, an axial shaft rotatable with said rotary-bolt and extending beyond the attaching face thereof to extend into a 1101s formed in the closure member upon which said rotary-bolt is to be mounted, and engagement means at the extended end of said shaft to engage the engageable portion of said projectablebolt-member so that rotation of said rotary-bolt int'o'engaging position will simultaneously move said proj 'ectable boltmember into engaging position. 7

r 11. In combination, closure fastening means comprising a rotary-bolt ofthe win-v dow-fastening type and catch-means for engagement thereby, a tubular body provided with a side-opening and adapted to be mount+ ed in a hole formed in the closure member upon which said rotary-bolt isto be mounted, a projectable bolt-memberlmovably mounted in} said tubular body and projectable to engage the closure member with which said 'catch-means is to be associated and provided said shaft to engage the engageable portion of 7 said projectable bolt-Inemberso that rotation of said rotary-bolt into engaging position will simultaneously move said projectable boltmember into engaging position.

12. In combination, closure locking means comprisinga rotary-bolt of the window-fastening type and catch-means forengagement thereby, a tubular body provided with a sideopening and an internally open detent socket and adapted to be mounted in a hole formed inthe closure memberupon which said rotary-boltis to be mounted, a projectable boltmember movably mounted in said tubular body and projectable to engage the closure member with which said catch-means isto be associated andprovided with an engageable portion exposed through said side opening, a spring'pressed detent mounted in said boltmember. to engage .in said detent socket when said bolt-member is projected, an axial shaft rotatable with saidrotary-bolt and extending beyond the attaching face thereof to extend into a hole formed in the. closure. member upon which Said rotary-bolt is to bemounted,

engagement means'at the extended end of said shaft to'engage the engageable portion of said projectable bolt-member sothatrotation of said rotary-bolt into engaging position will simultaneously move said projectable bolt-member into engaging position, and meansby which said detent may be depressed to enable retraction of said boltmember. Y I

13. Incombination, closure locking means comprising a rotary-bolt of the window-fastening type and catch-means for engagement thereby, a tubular body provided with a sideopening and an internally open detent socket and adapted to be mounted in a hole formed in the closure member upon which said rotary-bolt is to be mounted, a projectable bolt: member movably mounted in said tubular body and projectable to engage the closure member with which said catch-means is to be associated and provided with an engageableportion exposed through-said side opening, a spring pressed detent mounted in said bolt-member to engage in said detent socket when said bolt-member is projected, an axial shaft rotatablewith said rotary-bolt andextending beyond the attaching face thereof to extend into a hole formed in the closuremember upon which said rotary-bolt is 'to be mounted, engagement means at the extended end of said shaft to engage said engageable portion of said projectable bolt-member so that rotation of said rotary-bolt into engaging position will simultaneously -move said projectable bolt-member into engaging position, and means by which said detent may be depressed to enable retraction of said bolt= member, said detent being more resistant to forcing than a part of'the structure through which movement of the bolt-member is effected. g

14. In combination, closure locking means comprising a rotary cam-bolt of the windowfastening type and catch-means for engagement thereby, a tubular body provided with a side-opening and an internally open detent socket, and adapted to be mounted in a hole formed in the closure member upon which said cam-bolt is to be mounted, a projectable bolt-member movably mounted in said tubular body and projectable to engage the closure member with which said catch-means is to be associated and provided with engagement means exposed through said side opening, a spring pressed detent mounted in said bolt-member to engage in said detent socket when said bolt member is projected, an axial shaft rotatable with said cam-bolt and extending beyond the attaching face thereof to extend into a hole formed in the closure member upon which said cam-bolt is to be mounted, engagement means at-the extended end of said-shaft to engage the engagement means of said projectable bolt-member so that rotation of saidcam-boltinto engaging position will simultaneously move said: projectable bolt-member into engaging position, and means by which said detent may be depressed to enable retractionof said boltmember, said structure embodying a lost-motion connection to enable member drawing movement. of

in said detent socket.

15. The combination with relatively trans; versely; movable abutting closure members, of a surface bolt mounted on one ofsaidversely movable abutting closure members ofa surface boltmounted on one of said members and catch-means for engagement thereby cooperatively mounted on the other of said members, a projectable bolt in the member ongwhich said surface-bolt is mounted and connected to operate, simultaneously with said surface bolt, a recess in the abutting face of the body proper of said other member for engagement-by said projectable bolt when the latter is projected, and meansyfor preventing forcing of said projectable bolt from engaged position by manipulation of said sudface-bolt so that the closure cannot be opened by jimm ing, slicing or manipulation of said sur ace bolt.

17. The combination with relatively transversely movable abutting closure members of a surface bolt mounted on one of said members and catch-means for engagement there-,

by cooperatively mounted on the other ofsaid members, a projectable bolt in the member on which said surface-bolt is mounted, a recess in the abutting faceof the body proper of said other member for engagement by said projectable bolt when the latter is projected, means for efi'ectingprojection, of said pro,- jectable bolt upon movement of said surface bolt to engagingposition, and means for preventing forcing of said projectable bolt from engaged position by manipulation of said surface-bolt so that the closure cannot be opened by-jimmying, slicing or manipulation of said surface bolt.

18. The combination with the meeting rails of asliding sash, of a projectable bolt mounted within the body proper of the inner of said rails, a recess in the body proper of the outer of said rails to receive the end of saidbolt when the latter is projected, and a thimble lining said recess having at least'its 'bottom end hardened to prevent access being 'obthe cam-bolta-fter engagement of said detent tained to the end of said bolt by drilling from the exterior of said outer rail, said thimble being of greater depth than the extent of proj ection of said bolt so that said thimble cannot be driven against said bolt member, substantially as and for the purposes described.

19. The combination defined in claim 18, 7

said thimble being provided with flange means at its open end extending beyond the limits of the projectable bolt structure in juxtaposition to the adjacent face of the inner meeting rail, substantially as and for the purposes described.

In testimony whereof, I have signed my name to this specification.

HERMAN H. KISTNER.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3277677 *Jul 16, 1964Oct 11, 1966Hurvitz ArnoldLocking means
US4181333 *Mar 31, 1978Jan 1, 1980Keeler CorporationSash lock
US4790577 *Feb 29, 1988Dec 13, 1988Helding Curtis LDoor push-bar lock-out retainer
US6116665 *Jul 26, 1999Sep 12, 2000Allen-Stevens CorporationPick resistant sash lock and keeper and method of locking sashes
US6142541 *Nov 24, 1998Nov 7, 2000Truth Hardware CorporationPick resistant sash lock
US6347820 *Aug 10, 2000Feb 19, 2002Allen Stevens CorpPick resistant sash lock and keeper and method of locking sashes
Classifications
U.S. Classification70/90, 292/5, 70/422, 70/89, 292/DIG.200
International ClassificationE05C3/04, E05B35/00
Cooperative ClassificationE05C3/046, E05B35/00, Y10S292/20
European ClassificationE05B35/00, E05C3/04B6