US2379050A - Multiple bolt rim night latch - Google Patents

Description

June 26, 1945. f v|| G. volGHT 2,379,050

` MULTIPLE BOLT R`I MANIGH`T LATCH Filed Deo. 4, 1943 iid,

Patented June 26, 1945 MULTIPLE BOLT RIM NIGHT LATCH Henry G. Voight, Hamden, Conn., assigner to Sargent & Company, New Haven, Conn., a corporation of Connecticut Application December 4, 1943, Serial No. 512,848

1-0 Claims.

This invention relates to locks, and While ap-v plicable to other kinds of locks, it is illustrated as applied to a night latch which is adapted to be operated from one side by a thumb turn and from theother side by a key. Also as illustrated, the improvements are applied to what is termed a rim lock in that, as shown, the lock case is mounted upon the exterior surface of the door instead of being mortised in the door, as is frequently the custom.

In locks or latches of this character the mechanism is usually provided with a bolt which may be either a dead bolt or latch bolt adapted to be protracted from the case into engagement with a strike. Some difficulty has been encountered with such constructions in the past in that they have been subject to being jimmied orbeing forced open by a tool inserted between the bolt and strike, and thus forcing the bolt rearwardly into the case.

It is contemplated by the present invention to provide a lock which shall be jimmy proof, in that the bolt operates in such a manner that it cannot be retracted or disengaged from the strike by a tool inserted between the bolt and strike at the outside of the door. In accomplishing this function the lock is so constructed that the bolt member, which is protracted into engagement with the strike, is not only moved longitudinally but also swung about a pivot on-a bolt carrier so that it cannot be retracted by a longitudinal movement alone, but there must also be imparted to it a reverse swinging movement to free it from the strike. Moreover, in the present instance a plurality of such swinging bolt members are provided, thus rendering it increasingly difficult to jimmy the lock and thus effect entrance to the door.

One object of the present invention is to provide a door lock which shall be substantially jimmy proof.

A further object of the invention is to provide a lock of the so-called night latch type, in which the bolt when projected from the lock case will be given a swinging movement to embrace, or partially embrace, a.l strike member whereby it must, upon retraction, undergo a swinging movement in a reverse direction.

g A still further object of the invention is to provide a rim lock of the character described which shall be simple in construction and operation, and at the same time be proof against being opened by a tool inserted between the lock case and the strike.

To these and other ends the invention consists in the novel features and combinations of `parts to be hereinafter described andclaimed. l

In the accompanying drawing:

Fig. l is a sectional view of a lock embodying my improvements, showing the lock as applied to the surface of a door; -I 1 Fig. 2 is a sectional view of the lock on lline-2-"2- of Fig. l, showing the parts as they appear with the cover of the lock case removed and the `bolts in protracted position;

Fig. 3 is a sectional View on line 3-3 of and A Fig. 4 is a fragmentary horizontal sectional view similar to Fig; l but showing ther fron-t p0rI tion of the lock only, and showing the bolts in' retracted position. l

In illustrating a preferred embodiment vof my invention kI have shown a door I0 having mounted on the inner surface thereof a -lock'case'I-I provided with a cover I 2, the cover being secured in place by means of a post I3 secured to the-case II and receiving a suitable fastening member such as a screw entering through an opening the cover I2. The case is provided in its forward end with a plurality of spaced bolt openings I la.'

Cooperating with the lock case is a strike I4' adapted to be mounted on the door frame. Asv shown, a strikemember I5 is carried by the strike, this member being in the form of a verticallyv dis-J posed bar or rod of circular crosssection secured to the member I4 adjacent the front wall thereof. The strike I4, as is usual, is open on thesidej Fie. f2;

toward the lock case II, so as -to receive the boltv or bolts of the lock upon protraction thereof.

Mounted in the lock case is a bolt carrier'l having at its lower corner a rearwardly extending tail portion I'I which is rigid with the carrier and maybe formed integrally therewith, Upon the tail portion I1 is pivoted at I8 a tumbler I9, the tumbler being urged in a counterclockwise direction about its pivot by means of a spring 20, one end of which is engaged with the tumbler and'the other end lodged against a lug 2| on the portion I1 of the carrier.

The end 22 of this tumbler projects upwardly between talons 23 formed at the rear end of the tail portion I1 of the bolt carrier, which tail por tion is also provided with a longitudinally extending slot 24 in which is slidably received'a post 25 secured to the lock case I I. The tumbler I9v is provided with a detent 26 normally engaged with" The bolt carrier I6 is provided with a plurality of recesses or slots 28, three in number, as shown. In each of these slots is mounted a bolt 29, each of these bolts being pivoted to a pin 30 secured to the carrier, and the slots 28 are, as shown in Fig. 1, of sufficient extent laterally so as to permit swinging movements of the vbolts about the pivot pin.

As shown more particularly in Figs. 1 and 4, the forward end of each of the bolts is hookshaped in form, as at 3l, the inner surface of the end being rounded as shown at 32, so that the bolt when protracted may partiallyembrace the strike member I5. The cooperating surfaces of the strike member I5 and theY portion 32. of each of the bolts are such that when each of the' bolts is retracted it will, if permitted a swinging movement, be cammed by these cooperating' surfaces to swing about its pivot so that it` will passVv out of engagement with the strike member.

It` will also benoted that each of the. bolts is provided with atail portion 33 -on the opposite side of its pivot from its forward end 3i, with operated lock structure, as they may be of the usual form well known in the art.

It will be seen that when the bolts 29 are protracted as shown in Figs. 1 and 2, they cannot be forced rearwardly by a tool inserted between the lock case and the strike as they must .be swung about their pivots before this movement can be eifectedand any such swinging, movement is prevented by they engagement of the tails 33 of the bolts with the rib 34, so that the lock may not be jimmied in this manner. When it is desired to open the door, however, the rollback 36 {gjage the tumbler I9 from the detent 25, and

thereafter to engage one of the talons 23 and move the bolt carrier and bolts rearwardly, the

' bolts being disengaged at this time from the strike which tail portion is adapted to cooperate a rib 3,4 formed on the case and of a suicient length in a vertical direction to engage the tail pieces of all of the bolts.` Thus it will be apparent. that, aszthe bolt carrier is moved forwardly from the position shown in Fig. 4` tothat. shown in Fig` 1, the bolts 29 will be protracted from the. case, and that as they approachv theirA extreme protracted positions the tail portions 33 will strike therib 34,-and, the bolts will be swung about their pivots 30,*to hook over or embrace'the strike rod I5, thus securely locking the door in` closed position. When the bolt carrier is moved1 rearwardly from the position shown in Fig. 1, thetail' portions 33 of thebolts will be movedaway fromthe rib 3G and thusl will permit the. bolts` to-be cammed by the strike member I5 in a reverse direction, thus disengaging: this.. strike member and: permitting thebolts to be retracted into the lockY case, as shownin- Fig. 41.'

. `The bolt carrier maybe operated by'any desired means. As shown, however, a rollback 363 is securedfto-a hub 3-1, rotatably mounted in thel case, to. which hub; is secured. a thumb44 turn 38 at the outsidey ofthecasebut on the insideof the door, so that the rollback 36 may be freely rotated by the thurnbturn.` The-rollback is'provided. with a pair of posts 39, oneupon eachend, designed: to enter between thetalons 2,3-, and by engaging the endl22 ofthe tumbler I9 free the detent 26. from engagementwith the post 25. Afterthisr has beendone continued rotation of thevrollback will cause one of the posts 39 to, engage. one ofthe talons 23'and move the4 bolt carrier Ilia inv the desired" direction, the carrier, of course, bringing the bolts with it. e To maintain the rollback 3,6 in a'neutralposi.- tion; as shown 1n Fig. 2, a bar 401is pivoted to the case at 4I, and maintained by a spring 42 in a position in which its-lower surface bears against the rpostsy 39. When the rollback is actuated the bar 40 will, of course, be moved upwardly` about its; pivot; against the tension. *ofA its 'springy `but will be returned by the spring to the` position shown'in Fig. 2 to, normally hold; the rollbackin its neutral position. i lAt the outside of theadoor` there, -mayi'beproa vided a key-operated lockMfhaving apstenr 4.51m; non-rotative engagement withthefhub 3T. sothat this hub and the rollback` ,36.*v `martha actuatedi from. the outside ,otthefdoor by akey` "Itisinot: deemed'necessary. to. show thefdetailslofi tbisekeyf.

member I5.

While I have shown and described a preferred embodiment of my invention, it will. be understood that it; isA not to be; limited to.. all of the' details shown,Y but is. capable of modification and variation within the spirit of the inventionA and within the scope of the claims.

What'I claim is:

1. In a. door lock, a4 case having a bolt opening, a, bolt carrier slidably mounted in the case, a bolt pivotally carried by saidI carrier to swing about a vertical axis, means, to. reciprocate said carrier to. retract said bolt into the case and protract it. therefrom` through said opening, and means; in xed position on thecase to.` engage.l said bolt. during; the protraction thereof and effect a swinging movement. of the bolt about its axis, said@ bolt being pivotedy adjacent its rear end. to the carrier and. extending forwardly from the front edge thereof to. project from the case, while the carrier is retained therein.

2. In a door lock, a case having a bolt opening, a bolt` carrier slidably mountedr irr 'the case, a bolt; pivotally carried, by said` carrier to swing about, a vertical airis,y meansV to reciprocateA said carrier to retract, said bolt into. the case andprotractl it therefrom through said opening, means in iixed position on the case to engage said bolt during the protraction thereofI and effect a swing ing movement of thev bolt about its axis, and a. strike member comprising a vertically disposed bar which saidY bolt embracesA when protracted and.Y swung about its. pivot, said bolt being pivoted adjacent its rear end to the carrier and extending forwardly from the front edgethereof to project from the case:` and engage the strike member while the carrier is retained withinthe case;

3. Alock as-'in claim l, whereinz the boltcarrier comprises a relatively wide memberV extending vertically of the case and carries a plurality.' of said pivoted. bolts spacedA along. its width.

4.` fr lock as. in claim l,l wherein the bolt carrier comprises a relatively wide member` extentie. ing vertically of the case-and carries-.9.. plurality of." said' pivoted. bolts spaced; along,l its widtbtiu combination. with4 a. strike member comprising. a vertically: disposed bar embraced by said=` bolts when protracted. i

`5. In a, night, latchs, a, oase;l a. bolty carrier slid;` ably mounted in thel case, a plurality.' of bolts pivotally carried by the carriery andi arranged* in spaced relationl said= case being provided' with openings-.to permitprotractiom of saidi bolts wheny saidcarrier isgm'ovedf toward-fthe. front offtheA case, each of said bolts, being; provided with' a taillpor tion, and means on the case to engage the tail` portion of each, of the bolts and' swing-the latter about their pivots when the carrier nears the end of its forward movement.

6. In a night latch, a case, a bolt carrier slidably mounted in the case, a plurality of bolts pivotally carried by the carrier and arranged in spaced relation, said case being provided with openings to permit protraction of said bolts when said carrier is moved toward the front of the case, each of said bolts being provided with a tail portion, means on the case to engage the tail portion of each of the bolts and swing the latter about their pivots when the carrier nears the end of its forward movement, and a strike member carrying a vertically disposed bar to be embraced y by said bolts when protracted.

each of said bolts being provided with a tail portion, means on the case to engage the tail portion of each of the bolts and swing the latter about their pivots when the carrier nears the end of its forward movement, a strike member carrying a vertically disposed bar to be embraced by said bolts when protracted7 and means to eiect reverse movement of said bolts about their pivots when the carrier is moved rearwardly to retract the bolts.

8. In a night latch, a case, a bolt carrier slidably mounted in the case, a plurality of bolts pivotally carried by the carrier and arranged in spaced relation, said case being provided with openings to permit protraction of said bolts when said carrier is moved toward the front of the case, each of said bolts being provided with a'tail portion, and means on the case to engage the tail portion of each of the'bolts and swing the latter about their pivots when the carrier nears the end of its forward movement, said bolts having hookshaped ends to engage astrike member'.

9. In a night latch, a case, a bolt carrier slidably mounted in the case, a plurality of bolts pivotally carried by the carrier and arranged in spaced relation, said case being provided with openings to permit protraction of said bolts when said carrier is moved toward the front of the case, each of said bolts being provided with a tail portion, and means on the case to engage the tail portion of each of the bolts and swing the latter about their pivots when the carrier nears the end of its forward movement, said means comprising a rib extending vertically along a wall of the case adjacent the frontportion thereof.

10. In a night latch, a case, a bolt carrier slidably mounted in the case, a plurality of bolts pivotally carried by the carrier and arranged in spaced relation, said case being provided with openings to permit protraction of said bolts when said carrier is moved toward the front of the case, each of said bolts being provided with a tail portion, means on the case to engage the tail portion of each of the bolts and swing the latter about their pivots when the carrier nears the end of its forward movement, and a strike member carrying a vertically disposed bar to be embraced by said bolts when protracted, said bolts having hook-shaped ends to embrace said bar when swung about their pivots by engagement of the tail portions thereof with said means, and being reversely moved about their pivots by engagement with said bar upon retraction of the bolts when the tail portions are disengaged from said means.

HENRY vG. VOIGHT.

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