US1782776A - Rotary bolt lock - Google Patents

Description

l F. J. DowLlNG ROTARY BOLT LOCK Nov. 2,5, 1930.

original Filed June 17, 1925 2 Sheets-sheet zul.

Nov. 25, 1930. F. J. BOWLING 1,782,776

ROTARY BOLT LOCK rginal Filecr- June 17. 1925 2 Sheets-Sheet 2 Y lNvENToR Patented Nov. 25, 1930A UNITED STATES Y FRANo1s"L"r `.."nOwLING, OF NRW YORK, N. ir., AssIGNOR To FRANCIS Kinn & SON, rNol., Y Y or NEW YORK, N. Y., A CORPORATION or NRW YORK Y "'ihis invention relates tolock Yconstruction and, with regard to its more specific features,

to jimmy-proof locks such as those employing a rotatable boltmember. u j One of the ob'ects of the invention is to u provide a lock which is thoroughly practical and highly. efficient, affording Ygreat security. Another object is to provide a construction of the above nature having a bolt' which, when it is in locking position,is`depend`ably j held insuch position against any attempt to ofi a tool `or otherwise. j to provide a lock of the above nature which 1s force theibolttoretracted positionby means simple. inV construction and inexpensive to build. M i Y' Another object of the invention is to provide a lock having apluralityof rotatable bolts which" cooperate with each other and withl an actuating means to provide a strong and reliable jimmy-prooflock- Another objectis to provide abolt having guarding and reinforcing means which dependably protect the boltfroni being cut through by asaw o r the like. Other objects will be in part `obvious K or in part pointed out .hereinaften i side of Figure. 1;

The invention accordingly consistsin the features of' construction, combinations of elements and arrangements ofparts as `will be exemplified in the structure to be hereinafter described, the scope of the.`application of claims.

In the accompanyingdrawings in*` which are shown one orflnoreoi',` the various possiT i i whichwill be findicatedfinthe'gfollowing blfef embOdimentsof-the several features of `this'invention,j` Y Y Figurel isafview from the rear side of thelockfoasing showing the rear cover plate removedfto expose the mechanism, and showingthe bolts in retractedlposition; j

,Figure` 2V is `a viewjfro'm4 the rightshand j "Figure Sis a view similar-to Figure lfbut showing thebolts inV projected and locking position; ju j f l,Figure 4 is a view `fronti the rightshand sideof Figure 3; Y y Y Y `l3`i`guref5i is a section taken along the line 5 5OfFigure3; l Yi Y` Another object "is Y Y Figure`14 isa PATENT OFFICE 4 Y Y ROTARY BOLT LOOK .i Application med rune 1.7, 1925, serial No. 37,658. .Renewed November 15,192'7'..` j

Figure 6 isV asection taken along the line 6 6 of Figurel; f j i f i D Y .F'gure` 7 isaperspect'iveviei'v of a bolt and the parts carried thereby, partially brokenaway;` Y l Figure is a view similar to Figure 1 showing a modified Vconstruction Vand showl ing the bolts at an intermediate position Figure 9 is a sectionl taken as indicated by the line .9-.-9 "in 'Figure 8; Y

Figure 10 is a view similar to`Y-Figure8 j but showing part` of the actuating mechamsm removed; j

Figure lllis a section taken `as'indicatedby the line 11-11 in FigurelO; j j. Y

j Figure 12 is'a section taken as indicated by the`line`1212 inFigureylO, i f j Figure`13' is an elevationof the strike or keeper;V i j j w. u i

sectional view of the strike,

Figure 15 shows the keeper viewed' froin the left-hand side {Of Figure 13;

`Similar reference characters referto sini-` the drawings.

vlar parts throughouttlie severalvi'ews of Referring now" to the drawings in detail,

andlirst to Figure l, there is showna1 lock casing 1() having in the right-hand end Wall thereof (as-viewed in Figure 1) an opening "l through which a pair of bolts 11 are arranged to slide and take `int`o'a keeper when slid outwardly or projected. As shownfin Figure y 2, each of thesebolts 1l is provided at itsouter end with a transversely projecting `arm `or i tongue 12 whichis adapted to `turn into jimmyproof position within Y a @wall ofthe keeperwhen the bolts are projectedv and `ro-` tated," as" will be described hereinafter. As shown in Figure 2, theend wall of the casing 10 is` preferably provided with a single open-L ing forthe reception of thebolts,` this open# i ing consistinrof `two circularly shaped por-` tions 16in which thefboltsfslide and4 aYcon`-` nectingstraight portion 17 forreceiving theV tongues 12. When the bolts` are inmetr'acted position, asshown "in Figuresjlf and 2, the

tongues 12 projecttowardeach other and substantiallylill the Vopening portion 17.`

lVhen the bolts areA projected into final locking position, these tongues 12 are moved through substantially O and into positions at right angles to their positions when the bolts are retracted, all as will be described more fully hereinafter.

As shown in. Figure 7, each ofthe bolts 11 is preferably provided with a cylindrical outer sleeve 13 of hardened steel. The body portion ofthe bolts may be made of some relatively soft but suitably tough,V and strong material. The sleeves 13 have a loose fit upon the bolts 11 so that they ai'e freely rotatable thereon. These sleeves thus serve as a reinforcement for the bolts, entering the keeper therwith, and they serve as a dependable guard Vagainst any attempt to saw thebolts in two, as by means of a saw inserted between the lock casing and the keeper. lf it is attempted to saw the bolts in two, the saw merely causes the sleeve 13 torotate without havingany cut-ting action thereon, and th'ebolts are thus safeguarded.

Atfthe outer ends of the bolts the sleeves 13 are held in placeby the tongues 12 and the flanges which are preferably provided as shown in Figure 7. r"he outer surfaces of the sleeves preferably come substantially flush with the edges of these end flanges of the bolts, as may be seen in Figure At the inner ends of the bolts (Figure 1) are provided members 14, in the shapeof collars or iings, which are secured uponthe bolts as by means of pins 15 (Figures 5 and 7). These members 14.y hold the sleeves 13 in place at the rear ends of the bolts. The sleeves 13 are thus Vdependably held in position on the bolts, being loosely mounted-thereon for rotation relative thereto and held against endwise movement relative to the bolts by means of the flanges at the forward endsthereof and the members V14 at the rear ends.

Referring again to Figure?, rearwardly of the members 14 the bolts are provided with reduced portions 22 and, rearwardly of the portions 22 are enlarged portions or heads 21. The portions 21 are of a ldiameter equal to or less thanthat of the body ofthe bolts 1l so that the members 14 may be slipped thereover `and into position upon the rear ends of the bolts.

Referring again to Figure 1, within the casing 10 is a slidable plate member 2O which is supported and guided in its sliding movements by suitable tracks or flanges 32 (Figure 3)` formed on the inside of the casing. The edge of the plate 2O adjacent to the bolts 11 is provided with a projecting flange 24 (Figure 6) and, adjacent to this flange are a pair of openings-26 (Figure 1) for receiving the heads 21 of the inner ends of the bolts. Secured to the surface of the plate member 20, opposite to the flange 24, is an' angle member provided with a flange 2Q resting against the plate 20and an upstanding flange 28. This angle member is fastened in place by suitable rivets or screws 30, as shown in Figure 1, and has a pair of openings 31 registering with the openings 26 in the plate 20. As shown in Figure 6, circular openings 27 are formed in the end wall built up of the combined flanges 24 and 28, and in these circular openings rest the reduced portions of the bolts, the heads 21 resting in the registering openings 26 and 31. Thus, the bolts 11 are 7:3 connected to the plate 2O to partake of the sliding movements of the plate and to rotate relatively thereto about their respective longitudinal axes. Referring to Figure 5, each of the members 14 of the bolts 11 has a pair of projecting lingers or horns 18 and 19. As shown in Figures land 6, Xed within the easing are a pair of spirally shaped cams 33 against which the projecting horns 18 bear. As shown in Figure 6, there is provided a spring 35 anchored upon pins 36 secured in the flange24 and engaging with the bolts 11. Preferably the ends of the spring 35 enter openings 37 (Figure 7) in the heads 21 of the bolts. viewed in ""-l Figure4 6, the spring 35 tends to swing' the left-hand bolt 11 in a counter-clockwise direction and tends to swing the right-hand bolt 11 in a clockwise direction, thereby holding the horns 18 against the cam surfaces As shown in Figure 1, the cams 33 have portions which are substantially straight so that. as the projection of the bolts is started, they are held against rotation for a given length of movement and until they enter the keeper; thereafter, the spiral portions of the cams come into operation and rotate the bolts relative to the plate 2O through substantially 90", turning the bolts into the position shown in Figures 3 and 4.

Thus, by moving the sliding plate 20, the bolts 11 are moved from the retracted position shown in Figure 1 to the extended or operative position shown in Figure 3. During this movement the sleeves 13 move loiigitu dinally with the bolts, but preferably do not rotatethcrewith, the sleeves being preferably held against rotation by frictional Contact with the casing and the bolt members 11 rotating` within the sleeves. Vhen the bolts reach final'locking position, the members 14 thereon come into engagement with the inner surface of the striking wall of the casing and limit the outward movement of the bolts. As shown in Figure 5, projecting inwardly from the striking` wall of the casing is a flange 47 spaced from the cam surfaces 33. lVhen the bolts reacli'final locking position, the horns 18 are positioned between the flange 47 and the cam surfaces and the bolts are thereby depeiidably locked against reverse rotation until they have been moved inwardly. Thus, the bolts cannotberotated to bring the tongues 12 into position for withdrawal through the keeper opening without irststartinvg the bolts intheir retractive movement. 1 j

Considering now more particularly the actuating meansV for the bolts, swivelled in a wall ofthe casing is a crank arm 38 (Figure 3) which is preferably operated'by means of a handle on'vthe outer side of the casing wall.

This crank arm 38 is provided at its outer endl with .a crank pin 45 which projects through a about the pin 40 `and bears againstfa pin 43 projecting from the plate member and against a pm 42 projecting from the end of the bell crank 39. The spring 41 tends `to swingthe lever 39 in aclockwise direction,

as viewed in Figures 1 and 3. i j

When the bolts are movedffrom the retracted position shown in Figure 1 to the final locking `position shown in Figure 3, or given their reverse movement of retraction, the

l crank arm `38 swings through substantially 180, as is indicated in the drawings. Referring to Figure 1, it will be seen that, when the bolts are inretracted position, thepin 45, the center of rotation ofthecrankarm 38 and the pivot 4() are substantially in line with respect to the direction of movement of the bolts 11. Also, `as shown in Figure 3, `when thebolts are `in final lockingjposition,

these three pivots are again substantiallyin line." The crankarm38 and the lever 39 thus constitute a toggle mechanism for actuating the rotatable bolts, and coact with the latter in a highly advantageous way. For example, as the'mechanism is caused to be moved from the position shown in Figure 1 to that of Figure 3, any resistancefto rotation of the bolts is effectively overcome by the action of j the spring `41 which, acting on the toggle, in-

sures straightening out of the toggle andthus makes certain of the complete extension and rotation of thebolts. This action thus makes it unnecessary'to rely wholly upon the oper-j` ation of the cranks 38 and 38a; The relatively small effectiveness of the spring 41 is greatly` multiplied bythe toggle and complete move` ments of'rotationof the bolts are dependably assured, into the positions sho-wn in `Figures 1 and V3. The upper endof the slot 44, as viewed-inthe drawing, limitsthe swinging movement of the parts. "Referring to Figure 3, it will beseen that the piyot pin 45 has moved to a position'in whichitis on o-r beyond fa line ldrawn between the axis ofthe crank arm 38 and the pivot '40,` The bolts are thus j dependablv lockedin their rotated'andfex` tended positions bythis toggle against any attemptto` force them. The toggle cannotbe brokenbyany external forcegapplied tothe. bolts but only Vby turning `the crank arm y38V and thelever 39.

plate inthe usual manner, inwhich is pivoted a `crank arm operated by a key 'and having a crankpm taking `within theV arcuate flange 46 `(Figures 1 and .3), the flange 46 being formed upon the lever or toggle arm 39and concentric with the crank pin 45 of the crank j' arm 38.

In the embodiment Y shown in Figures 1-7 and above described, when the bolts are projected into lockingfposition they rotate 1 in `thedirections indicated :by' the arrows a in Figure 6, and the `horns V44or followers 18 are held against the cam surfaces 33 by means of the spring 35. lIn the embodiment shown in Figures 8-11 the operation of the bolts is substantially as hereinbefore described exg ceptthat the bolts rotate in the opposite directions and a `modified cam construction is provided for cooperating withthe followers 18. Referring to Figures 9, .10, 11 and 12, thecam followers, which are in theseffigures numbered 18a, cooperate with spiral cams in the form of Va pair of grooves 33a formed in theeasing 10. These cam grooves 33au positively rotate the boltsiin both theirl movement of projection and movement of retraction, andthe springmeans for holding` the followers in engagement with the cams is done away with; `The bolts, as vthey move from retracted toward operative position, ro" tate in the directions indicated by the arrows b inFigure 9, and move through the keeper opening 49 into the position shown in Figure 13' As is seen in Figures ,10 and 11, the Cams 33a have substantially straight por tions which hold the bolt membersagainst rotation during a `first portion of their pro jecting movement `and until the bolts have been advanced a` siiiiicientl distance toenter the keeper j 48, thereby permit-ting the tongues 12L to rotate into position .in back of the wall 50 of the keeper. f e L j As shown in Figures 13, 14 and 15, the strike or keeper48 is preferably provided with an opening 52 therein in addition to the opening 49" throughwvhich the boltsfpass.` This opening 52 is placed in a, wall of the keeper whichfis visible when the `dooris l closed, and through this opening'the opera! tion of thebol'tsmay be observedv as they enter the keeper and rotate into finallocle i ing position.` i

boltsand' dependablyguard against? any attempt to saw them intwo'. When the bolts f are in nal locking position the Hang-e 47 y L.

the casing depcndably locks them against rotative movement. The toggle formed by the arms 38 and 39 securely holds the bolts against any attempt to force them longitudinally out of the keeper. The lock is simple in construct-ion and compact and is capable of being nn'inufactured at low cost.

As many possible embodiments may be made of the above invention and as many changes might be made in the embodiment above set forth, it is to be understood that all matter hereinbeforo set forth or shown in the accompanying drawing is to be interpreted as illustrative and not in a limiting senso.

I claim l. In a lock, the combination with a rotatable bolt hav-ing` a follower, of means for causing the operation of the bolt comprising a carrier movable with the bolt cndwif-,le along the lock, said bolt being rotatable with respect to thel carrier, and a am which Vcooperates with said follower to cause rotation of the follower as a result of the endw movement thereof and the carrier, the cam being dissociated from the bolt.

2. In a lock, the combination with a rotatable bolt, of means for causing said bolt to operate comprising a cam, bolt projectingr means, said bolt having `a follower to engage said cam, and resilient means to retain said follower in engagement with said cani to insure proper rotation of the bolt.

In a. lock, the combination with a rotatable bolt, of means for ctnating the bolt comprising means to pro-ject and retract the bolt, a cam to rotate the bolt, means to render the cam effective to rotate said bolt during projection or retraction thereof, said cam being arranged to have contact with the lastmentioned means along one surface, and resilient means operative to retain said means in engagement with .said surface.

4t. In a lock, in combination with a casing and a rotatable bolt, of means for actua ing the bolt comprising a carrier to which the bolt swiveled to project and retrrut the bolt, a cam fixed to the casing to rotate the bolt as a result of its projection and retraction, means including),l a follower fixed to the bolt to render said am effective to rotate said bolt, said cam and said follower having contact with each other along the cam surface. and means to retain the cam and follower in engagement with each other.

5. In a` lock, the combination with a rotatable bolt, of means for actuating the bolt comprising means to project and retract the bolt, a cam to rotateV the bolt, a follower on said bolt, said cam having engagement solely with said follower to rotate the bolt, said follower having contact with said cam along a surface of the cam, and resilient means to retainV said follower in engagement with the cam at said surface.

6. In a lock, the combination with a rotatable bolt, of means for Vactuating the bolt comprising means to project and retract the bolt, a cam to rotate the bolt, a follower on said bolt having a finger to engage said cam, said cam having a single surface along which said finger has contact, and resilient means operative to retain said follower in engagement with the cam along said surface.

7. In a lock, the combination with a bolt, actuating means for causing the same to enter and engage a strike, and means independent of the actuating` means to cause rotation of the bolt whilef engagingthe strike, of'a sleeve journaled upon said bolt and extending therealong so as to reinforce the bolt and to guard the same from being cut by a saw, the saw being effective merely to cause said sleeve to rotate without damaging the same, said bolt being rotatable independently of the sleeve by means at the rear of the bolt and having means to engage the strike in a jimmy-proof manner when rotated.

8. In a lock, the combination with a bolt, means for projecting and rotating the bolt including a cam external of the bolt and dissociated therefrom, and a follower on the bolt having engagement with said cam to cause the bolt to rotate when the same is being projected, said cam having a surface along which said follower is arranged to move, resilient means to retain said follower in contact with said surface, and stop means within the lock arranged to contact the follower at an opposite side thereof relatively to the cam when the bolt is projected to prevent unintended rotation of the bolt.

9. In a lock, the combination with a lock casing, a rotatable bolt and means to move the same endwise along the lock. said means comprising a non-rotatable carrier movable endwise with the bolt, of cam means external of the bolt and secured rigidly at a side of the lock casing, said bolt having follower means at an end thereof engaging said cam means to cause rotation of the bolt while being moved endwise.

10. In a lock, the combination with a casing, a rotatable bolt, and means to move the same enclwise along the lock, said means comprising a carrier movable endwise with the bolt andrat the same speed, of a cam, and means secured to said bolt atan end thereof comprising a member having a follower to contact said cam to cause said bolt to rotate when projected by the means aforesaid, and a flange on the/bolt arranged to abut against the striking wall ofthe lock casing to limit the projection of said bolt.

l1. In a lock, the combination with a `casing, actuating means therein, and a strike, of a bolt comprising a plurality ofmembers which are movable longitudinallyasa unit, one of said members being rotatable within i-,veavve the other and havingprojecting means for inter-engagement with the strike, Athe outer e member` being projected by the vinner mem- ,.12., Ina lock, thecombination'with acasing, actuating means therein, and afstrike, of a plurality `ofloolts each of which is `rotatable into engagement within the strike when projectedby said actuatingmeans, said boltshaving tongues extending toward each other in retractedposition ofthe bolts, said tongues being effective for engagement with `the strike'asfaforesaid.

13. In a lock, the combination witha casing, and astrike, ofv a bolt comprising projecting means at the rear portion thereof, a cam fixed, within the lockV in engagement with which said.` projecting means is mov,a able for rotation of the bolt, and ari-,actiiatn ing member for moving the bolt longitudif nally to` cause rotation thereof by said cam,

the bolt having projecting vmeans at its outer end for engagementy with the strike as aref` sult of said rotation.' j, i f i 14. In a lock, the. combination with` a, casing, actuatingmeans therein', and-a strike,

rotatable into .engagement `with thefstrike when projected by said actuatingmeans, said `bolts having tonguesfto engagefthe strike extending toward "each otlfierfin4 retracted position l of the bolts, Y said` tongues being positioned to one A siede of ai4 plane passing through the axes; of the bolts,` said bolts being rotatable inthe direction' of the side of the plane aforesaid when the Vsame areibeing projected.` j ,j

15. `In a l ick, the combination with acasi ing and a strike, of `a bolt, andactuating means therefor, said bolt comp-rising a core, a

sleeve thereon, saidjcorehaving a flange at the forward `end` of vthebolt to retain the said core at. the rear end of the sleeve to ref sleeve on the bolt, said core having a flange at the rear end thereof .to engagesaid actuat-` ing means, said flange being ,positioned sub-` stantially within the elements bounding `the surface ofthe cor'etovpermit said 'sleevefto" pass thereover to seat on the core, and a ring arranged to pass over said flangeand seat on tain the sleeve on the core.` e j i e 16. In a lock, the combination with a casiiigand a strike, Vcfa bolt, and actuating iiieaiistherefor, said bolt comprisinga core,a sleeve thereon, said corehaving `flange at the forwardend of the `bolt to retain `the sleeve on the bolt, said core having a flange at the rear end thereof to engage said actuatingV means, said flange being positioned substantially within the elements bounding the surface of the core to permit said sleeve to pass thereover to seat on the core, and a ring ari'angedtopassover said flange and seat on said core at the rear end of the sleeve to retainthe sleeve on the core, said ring being arranged to abut `against thefront wall of Said casing to limit the outward movementof said bolt. i

17. In a lock, the combination with a vcasing and a strike, ofa bolt, and vactuating means therefor, said bolt having means at the inner end thereof to engage said actuating means, and a ring arranged to seat on the bolt in spaced relation tothe engagingmeans on the bolt, said actuating means having a bearingmember to be received in the space aforesaid, said iingactiiig alsoas an abut- `ment'to 4contact-thefront `wall of the casing `to limit the outward `movement ofthe 'bolt being subjectedto any `force inthat direction. `i

g 1,8.. In a lock, the combination witha casing, and a strikelof'a bolt comprising follower means at the rear Vportion thereof, a camlixed relatively to the casing and in engagement withiwhich said follower is movable for refn tating the bolt, and anactuating carrier'to move the bolt endwiseto Lcause rotation there-` of as` aforesaid, said carrier and bolt bein in the same position lwith `relation to each ot er` atV all times. i

j v19. In a loek,;the combinationhof acasing", a strike, arotatable bolt-projectable fromlthe l casing "ingto interlocking l`vengagement with:V

the strike, and actuating ,means for fthe'boltf thus preventing said` actuating means from for rotating it` includinga.stationary spiral 1 j cam fixed in the casing externally of the bolt, and afollower secured to the lbolt and having wiping contact with thecam,said cam having different degrees of spirality at `different points between its ends.`

20. In a lock, the combination; of `a casing,

ico

aV strike, a rotatable bolt proj ectable from the` casingl into engagement with the strike, and actuating means for the bolt including a stationary cam fixed relatively to the bolt, a follower` secured to the bolt and cooperating `withthe cam,"and a resilient` member to make` effective the cooperation between the cam and the follower. i i

21. In a lock, the combination ofa casing, a strike,`a rotatable `bolt projectable from the casing into engagement `with the strike, `and actuating meansfor the bolt comprisin a cam'ifixedreljatively to the bolt and'jwit a portion thereof disposed in the `forni subaxis of. `rotation andgfor rotating` said bolt into lfinal locking wposition, saidjmeans` includingcam means fto effect rotation of` said bolt and a fetoggle mechanism; adapted tol project said bolt and to move into a position to oppose initial unlocking movement of said bolt when said bolt is moved intor final locking position.

23. In lock constructioma casing, in combination, a rotatable bolt movable relative to said casing and into and out ot' locking position; a sliding member slidably guided by said casing and connected to said bolt to move therewith; means for moving said bolt including a lever pivoted upon said sliding member. a swinging arm pivotally connected to said lever, and means'for swinging said arm; and nie-ans for rotating said bolt.

24. In lock construction, in combination, a casing; a rotatable bolt movable in a direction substantiallylengthwise ot its axis of rotation into and out-oll sai-d casing; and means iior moving and rotating said bolt includinga cralnkarm siviveledina vvall-l off-the casing and a lever connected to` saidJ crank armand cooperating therewith to form-a toggle adapted to oppose initial movement ot the bolt' out of: locking position.

25. In lock construction, in combina-tion, a rotatable bolt; means for moving said boltl in a direction substantially lengthwise oi" its a-Xis of rotation into and out of locking position comprising a pair of swinging lever arms one of Whichhasa pivot movable inposition as thev bolt moves, saidtWo levers cooperating to :torni a toggle and said movable' pivot having suchv a range of movement that said toggle may straighten out; .and means responsive to the'actnation ot said means for rotation said bolt, the eitect of said toggle increasing as rotation ot said bolt proceeds.

26. In lock construction, in combination, a rotatablebolt; means for moving said bolt into and out of locking position and in a directionsubstantially lengthwise of its axis otrotat-ion comprising a pair of swinging lever arms one otwhich has a pivot movable in position a-s the bolt moves, said two levers cooperating to form a toggle and said movable pivot having-'such a range of movement thatl saidtoggle may straighten ont; means responsive to thefactuation et said means for rotating said bolt, the efl'ect' of said toggle increasing as rotation of 'said bolt proceeds, and spring means acting against said lever arms in a direction to oppose breaking oi said toggle.

27. In lock construction, in combination, a rotatable bolt; cam means for rotating said bolt as the latter moves in a direction substantially lengthwise of its axis` of rotation; and means for moving said bolt into and out ot' locking `position and for making said cam means eli'ective comprising a pair of' savinging lever arms'one oflvvhich has a pivot movable in position as the b'olt movesgsaid tivo levers cooperating tol form a toggle adapted to increase' in its eiiect -up'oir said-means fas movement of :said bolt proceeds and 'said movable pivot having such a range ot movement that the effective arms of said levers may move into alinement.

28. In lock construction, in combination, a casing 5 a rotatable bolt movable intoandout oflocking position through a Wall ot said casing; a sliding plate sl'idably guided by and Within said casing and to- Which said bolt is connected; means for moving said sliding plate and said bolt therewith including a lever arm pivoted in a Wall of said casing, a lever arm pivoted upon said plate, and a pin connecting the ends of saidlever arms and projecting through a slot in said plate, an endv of said slot limiting' the swinging of said arm; andI means responsive to the actuation of one of said lever arms for effecting rotation of the bolt.

29. In lock construction, in combination, a

casing; a rotatable bolt movable into `and out of locking position through a lWall vof said casing; asliding plate Within said `casing and to which said bolt is'con-nected; means tor moving said sliding plate andl said bolt therewith including a lever arm pivotedin a Aivall ot said casing, a lever arm pivoted upon said plate'and connected'With said irst-n'i'entioned lever arm to form therewith a toggle; means responsive to actuation of said toggle for effectingrotation lof 'said bolt; `and a' spring acting upon said toggle' and mounte'dto be movable With'said sliding plate.

30. In lock construction, inI combinatioi-i, a casing, a bolt having at its outer end means projectingv therefrom `adapted to enter and interengage with astrike,v means tor moving said bolt out of said casing 'and for rotating said bolt, said bolt having adjacent its inner end means responsive to said actuating means for coaction in effecting rotation of saidf bolt, and a rotatable sleeve journaled upon said bolt intermediate ot' said projecting means and said responsive means.

31. In a lock, the combination With a casing, actuating means therein, and a strike, of a bolt comprisinga plurality ot members Which are movablelongitudinally ras a unit, one oi said members being rotatable, in response to said actuating means, and having projecting means for interengageme-nt with the strike, and the other of said menlbers'bci'ng rotatably ournaled upon sai d rotatable member and being projected` with the latter in response to said actuating means.

In testimony whereof I atlix mv' signature.

FRANCIS J.. newlines.

lill

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