US1804956A - Lock - Google Patents

Description

'May12,1931. HSHAW 1,804,956

LOCK

Filed March '7. 1929 Patented May 1K2, 1931 Unirsel STATES f' fArENr oFFlcE JOHN H. SHAW, or- NEWHAVEN, CONNECTICUT, AssleNon 'ro sARGEN'r a COMPANY, 4 or` NEW HAvENcoNNEcTrcUT Y Y Loox V apiicafibn mea March 7, i929.' seran No. 344,975.

My invention vrelates to 'locks and more especially to locks in which a dead'bolt is vprotractable from ,the outside ofthe room by a cylinder lock mechanism and is protractable Jfrom the inside of the room,V by a thumb turn orthel-ike.

One of the primary objects of the invention is to provide a simple, inexpensive and efliofFig. 2, and showinga change key received ...w

cient lock of the above character.

, Another objectof theinventionV is toprovide an improved form of'lock having a dead bolt and latch` bolt in which a change key Vwhen inserted from Vthe outside and turned will retract thelatch bolt without, however, Vhaving any e-ect on the dead bolt, and whererin an emergency key,'on the other hand, will operate the deadbolt as well as the latch bolt.

vIn a more specific aspect, the invention rej lates to improvements in that form of lock mechanism shown in the patent to Voight, No. 1,271,632, Julyy 9, 1918.H In this patent vthereis shown a cylinder lock mechanism having two rollbacks and a'number of pin tumblers controllingthe operation ofthe rollbacks, each of the pin tumblers being provided with two breaksor shears, one set'of breaks or shears being brought into alignment by a change key in order to operate one rollback, while the other set of breaks or shears may be brought into alignment byA an emergency key to operate the other rollback. As distinct fromthe mechanism shown in the Voight patent, it is herein proposed to provide aV cylinder lock mechanism orthe like provided with` pin tumblers in which butra single set of breaks or shears is necessary and a single rollback is provided, whichlmay be yoperated by either a change key or an emergency key. The rollback of the present invention is provided with an element which is inoperative when the rollback isactuated by a change key and which becomes operative. only when the rollback is operated by an emergency key. *Y ,A --f n Tothese and other ends, the invention consists in the novel features and combination of parts to be hereinafter describedand claimedj In thedrawings,

Fig. 1 is an elevation of a lockmechanismembodying my'improvements, with the cap plate removed, showing thedead bolt innermal'retracted position; vFigZ` is a view of. the upper part of the lock showing the deadbolt in protracted position f Fig. 3 is a sectional'lviewy along f `of Fig. l;

Fig.v 4 is a sectional" viewfv along line-@44 in the cylinder lock mechanism;

F'g. 5 is a view similarto Figjc, but showing an emergency key received in the cylinder lock mechanism; f i' Fig. 6 is a fragmentary view, showing the Aillustrated my invention by showing apreerred embodiment of the same, the reference numeral 10 indlca-tes, 1n general, a lock, mechanlsm which 1s, except for certain improvements to be hereinafter pointed out, yquite Iimilarfto that shownin the Voight patent .referred to, and which is lprovided with `a usual mortise case 11A and yface plate 12,`by

means of which'it maybe mounted in nadoor or the like. In an upper part of the lock case 1l, a dead bolt 13 is located, while in thelower part of thelock case 11a latchy 111 isprovided. The latch bolt 14 may beretractedfrom the inside of the door by thensual knobl spindle acting on a hub 15 to draw back a retracting shoe or yoke 16, having an arm 17, engaging the crosshead 18 onlatch stem 19, latch 1410eingv urged into normal protracted position by means of coiled spring 2O mounted on stem 19 and having one end bearing againstthe f i head of the latch bolt, while the oppositejendr bearsagainst a stud21 on lock case 11.

In the upper part of the lock case a cylinder` lock 22 is screwed in at the outer side in the .'us'ual manner, 'and this cylinder lock through connections, tofbe' hereinafter described,k is adaptedto actuate a latch retractingjlever 23,

pivoted on its upper end to lockcasell, as atVV 24, and having its lower endin engagement Y with the crossheadvlS on latch stemj19. vThe dead bolt 13 has a fiat `shank 25, provided with talons 25 and 27, adjacent cylinder lock 22 and a cut-out portion 29 in the upper part of the shank which receives the fence or stem 30, which is cast on the back of the case. This fence guides the bolt for reciprocating movement and it is also guided in a suitable manner lat the lower part or the bolt shank. Below the talons, the bolt has a cut-out portion 31 for the reception of a thumb turn vhub 32, which is journaled between A the back and 'cap plate of the lock case 11, lnvthe lower part of the cut-out portion 31 a gate 33 is formed, which cooperates with a wing 34 on` the thumb turn hub. This gate 33 is provided with beveled or inclined surfaces to cooperaterin an obvious matter with the extreme edge of the wing34 to deadlock the bolt in protracted position and retracted position, respectively, and between the beveled or inclined surfaces a small notch is provided to receive the edgeof the wing as the latter 'is kmoved through a quarter turn for protractinor or retracting the bolt. j LThe bolt is provided wll'i a tumbler 35 `pivoted on a post 36 at the forward part of the bolt shank, so as to be carried by the bolt, and having a projection 37 extending between the talons 26 andV 27 into cooperation with the cylinder lock, as hereinafter described, This tumbler 'is provided intermediate its ends with a lug 38 to cooperate with the fence 30 in locking the bolt either in the retracted vposition or the protracted position. Below the tumbler 35 and pivoted to the lock case is a second tumbler 39 which cooperates with the thumb turn hub in deadlocking the dead bolt. This tumbler is pivoted on a post 40 'and has a spring 41, reacting against a lug 42. The main part of tumbler 39 overlies the lower portion of the dead bolt shank and 'at its .upper part is provided with notches which converge toward and meet each other near the upper edge of the tumbler. n

One of these notches is indicated at 43 and 'the other at 44, and the spring exerts an upward Vthrust on the tumbler so as to tend to keep it firmly seated against the thumb turn hub with one or the other of the notches 43 and 44 engaging the wing 34. The tumbler by being provided with these notches exerts Vsuch an upward thrust on the wing 34 as to hold it iny cooperation with one or the other ofthe inclined surfaces of the gate 33, so that the bolt will be securely deadlocked either in retracted position or protracted position and cannot be moved out of this position except by actuation of the thumb turn orjkey mechanism.

Thesprin'g action of the lower tumbler 39 isLimparted to the upper tumbler 35 bym'eans of a tumbler connector 45 having upperand lower pins 46 and 47 projecting rearwardly therefrom, the pin 47 entering a slot 48 in tumbler 35, while the lower pin 46 enters a small hole in tumbler 39. The slot 48 per- `key lplug49 controlled by sectional Apin tum- Yblers 50 key vplug 49 having mounted on an inner end thereof a rollback 51 having secured thereto a spacer 52 and an end cap `53. Spacer 52 is provided with a radially Adirected slot 54 for the reception of the shank 55 of a movable abutment 56, abutment 56 'being urged outwardly on rollback 51 by means of spring 57 received withina slot in the abutment shank and having an inner end bearing against screw 58 which vpasses n through the slot and into the 'rollback 51.

Screwsl 59. pass through cap k53'and spacer V52 to secure Vthese elements to rollbackf51 and thus hold the abutment and its shank against movement on rollback 51 except in 'a radial direction in slot 54, the outward movement vof the abutment being limited'by screw 58.

The latch retracting lever 23 may be actul'ated from the cylinder lock by means of a lever 60l pivoted on the dead bolt shank, as

at `61, and havinga free Iend 62 adapted to extend into cooperation with the upperledge of the lever 23 so that by depressing the lever 60 the lever 23 may be actuated to retract the latch. yFor this purpose, the Alever 60 is provided 'intermediate vits ends and in proximity to the cylinder 'lock with a 'comparatively -.deep operating projection 63 close to and having portions in substantial'alignment with the rollback 51' and abutment 56. lt will be observed, however, that theioperating projection `37on tumbler 35, while disposed in the'plane of the abutment 56, is not located in tlie' "plane of the rollback 51, so that the latter will not actuate said tumbler.

The operation of the llock is vas follows:

:Fig l'shows the parts in their Inormal position.

I When the 'guest enters the room he may insertasuitable keyin the cylinder lock which will bring their-breaks in the pin tumblers into alignment with the surface of the jkey plug, whereupon the latter may be rotated to bring` the rollback 51 into engagement with lever 'LGOjto retract :the latch V14, whereupon the'door may be lop'enedand the guest may enter. "When the guest is within the room and desires to lock the door fromthe insidefthe thumb `turn isactuated to yadvance the dead bolt, thus moving the dead'boltinto the position shown in F ig. 2. In'thi's position the lever'GO, which is carried on the post 61 of dead bolt 13 is moved to Ysuch a, position that Voperation of the lock mechanism `by use of the ordinary changekey will have no eifect thereon.

It will be noted that in this position rotation of the key plug will bring the abutment 56 into engagement with the tumbler 85, but the latter will not be actuated, owing to the fact that the abutment is free to reciprocate inwardly on the rollback, and thus clear the end of the tumbler and the talons on the dead bolt. If, however, an emergency key, such as that shown in Fig. 5,-is inserted in the cylinder lock, the extended shank on the key is received under the end of the shank or' the abutment 56 and holds the latter against movement in an inward direction. Rotation of the key plug 49 by means oi' the key will now bring the abutment 56 into Contact with the projection 37 on tumbler 85 to depress the latter and to bringthe lug 38 out ont engagement with the fence, 30, further movement of the key plug and abutment 56 bringing the latter into engagement with talon 26 to move the dead bolt inwardly into retracted position, the initial movement of the dead bolt bringing the lever 60 intorposition where it may be engaged by the rollback 5l to retract the latch, whereupon the door may be opened. V Y

It will be noted that the cylinder lock is provided with pin tumblers in which there is but a single set of breaks or shears, while but a single rollback is provided, this rollback, however, being capable upon insertion or" an emergency key, of operating the dead bolt mechanism, whereas, upon the insertion oi the ordinary or change key, the latch only may be actuated.

While I have shown a preferred embodiment of my invention, it is to be 'understood that the same is not to be limited to all the j mounted on said key plug, an element mounted on said rollback having a radially directed slot, an abutment having a stem slidably received in said slot, the stem or said abutment being provided with a radially directed slot,

CII

a fixed element passing through said last named slot and into said rollbacln'said iiXed element serving to limit movement of the stem in the slot of the slotted element, a compression spring mounted in the stem and having one of its ends in engagement with the fixed element, while the otherfend of the spring is in engagement with the abutment and urges the latter radially outwardly, said key plug being provided with a key receiving slot and the stemy being carried in the slotted element adjacent said key receiving slot, whereby it may be engaged by a key inserted in the key plug to be held outwardly against the iiXed element.

2. A cylinder lock comprising a casing, a

movable thereon in a radial direction,"said abutment being provided with a stem having 'faJ slot, a compression spring having one end in engagement with the abutment and resilother end of said'spring bears, said lined means acting to limit the outward movement of the abutmentV on the member, and means movement in a radial direction. 1 ,Y

3. vA cylinder-'lock comprising a casing, a

rotatable key'co-ntrolle'dA member, "an abut( l mentfcarried by said rotatable member and -whereby said 'abutment'ma'y be held against rotatable key plug in said casing, aro-llback ,Y

ing said abutment radially outwardly insaid slot, means for limitingthe outward-movement of the abutmentin the slot, said key plug being provided with a 'key'receivfing slot and said abutment havinga partthereoi' ad vmounted on saidkey plug, an element mounted on said rollback having a radially directed 'Y slot, an abutment having a stem sl'idably received in said slot, -acompression spring urg--r j aoent said key receiving slot, whereby itmay I vment or rollback connected tosaid member,

resilient means constantly urging said abutment into operative position, and means for yholdingsaid abutment rigidly against movementiaway from such operative position.A

5. A cylinder lock comprising a casing, a

rotatable key controlled member a` slotted element mountedonsaid member, an abutment having a stem slidably received insaid slot, thestem of'said abutment being'provided vwith `a `radially extending slot, 'ajliXed element mountedV on saidmem'ber and limit- "ing movementof the abutment in an outward direction, a spring urging said abutment against the :fixed element`, said abutment being normally. free to moveradially inwardly Vagainstthe'"compression of said spring, and said abutment being adapted to be engaged by a key inserted in the cylinder lock to be held against inward movement away from the fixed means.

6. Acylinder lock comprising a casing, a

said abutment from moving out of such Vop- Y erative position.

7. A cylinder lock comprisinga casing, a rotatable key controlled member, an abutment mounted on said member for relative movementin a radial direction, and means constantly urging the abutment outwardly t i into operative position, said abutment being normally free to move inwardly against said urging means and said abutment having a .part thereof adjacent the key receiving slot of the cylinder lock and adapted to Vbe engaged by a key received therein to hold the abutment rigidly against inward movement.

8. A cylinder lock comprising a casing, a key controlled rotatable member, an abutment mounted on said member for movement in a radial direction, said abutment being normally freely movable radially inwardly, resilient means for urging said abutment radially outwardly, means for limiting the outward movement of said abutment, and means by which a key inserted into the lock may hold the abutment against the limiting means.

9. A cylinder lock comprising a casing, a

y key controlled rotatable member, an abutment or rollback having an operative connection with said member, said abutment being movable in a radial direction, resilient means for urging said abutment outwardly, means for limiting the outward movement of the abutment, and means in addition to said resilient means forholding said abutment outwardly against the limiting means, said holding means preventing inward movement of the abutment.

l0. A cylinder lock comprising a casing, a rotatable lkey controlled member, an abutment mounted on said member for relative movement in a radialv direction, means constantly urging the abutment radially outwardly, said abutment being normally free to move inwardly against said urgingvmeans and means by which a key may hold the abutment rigidly against inward movement.

11. A cylinder lock comprising a casing, a key controlled rotatable member, an abutment mounted for movement Von said member, means for limiting thevmovement of said abutment, and means for holding the abutment rigidly against-movement away from the limiting means.

, In witness whereof, I have hereunto set my hand this 14th day of February, i929.

JOHN H. SHAV.

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