US1788287A - Lock and latch mechanism - Google Patents

Description

Jan. 6,1931.` Eff-'LAGG I 1,788,237` LOCK AND LATCH MEGHANISM 'Filed April 26, 1928 4 sheets-sheetv 2 mim lNVENTOR wnNEssEs I f f/ y Z 'gf y y aff, n .5 ATTORNEYS Jn.16,1j931. y v im@ 1,133,213;

i y` Loox AND LATCH yMEGHANISM Filed April 2e, ,1928 4 sheets-sheet Y 4 v l lNvENToR Lggf/m5277617?, i

ATTORNEYS V NEsss I I n n @g Patented Jan. 6, 1931 PATENT OFFICE Emmer FLAGG, or NEW vom, N. YQ

LOCK .AND LATCH MECHANIBM Application led April 26, 1928. Serial No'. 278,041.

la strained means'for projecting the same into a keeper when registered therewith, together with knob actuated means for retract-ing the bolt and key actuated means for rendering the knob actuated means effective and ineffective kwhereby the mechanism serves in the dual capacity of a latch and lock.

As a further feature, the invention comprehends in a lock and latch mechanism for doors, a knob controlled means for retracting the bolt, means controlled by a key insertable from the exterior for rendering the knobV controlled means effectivek and inefective, together with a permanent actuator for said latter means provided on the interior of so the door which performs the function offa key used on the interior. More specifically, the invention contemplates in a combined lock and latch mechanism for doors, a common bolt arranged in a housing carried by the door, which bolt is adapted to cooperate with'a kee r on the door frame and which bolt is projected into the keeper when the door is closed by virtue of a normally restrained projecting means, a 40 turnable knob being provided having oper- 'ative connection with the bolt for retracting the same while a meanscontrolled by anfinsertable and removable key is established for establishing or breaking theA connection to render the knob respectively eective or ineffective.

`The invention furthermore embodies in a combined lock and latch mechanism of the character set forth a key actuated tumbler A assemblage which normally serves to render be employed in `connection with a -lts keeper with the kno -nism inelectiveand the bolt sub'ect to rethe bolt retracting knob eHect-ive but which when manipulated ,bythe key disposes the tumblers in such a manner as to render the bolt retracting knob ineffective.

As a still further object, the invention comprehends av tumbler assemblage including key engaging and actuating portions for separate cooperation with a regular key and with a master keywhich master key may plurality .0 of tumbler assemblages. v

Other objects of the invention reside in the comparative simplicity of construction and mode of `operation of themechanism, the economy with which -it may be produced and the general eiiciency derived therefrom.

With the above recited and other objects in view, reference is had to the following description and accompanying drawings, in which there is exhibited one example or em- 7 bodiment of the invention, While the claims define the actual scope of the same.

.In the drawin s:

Figure 1 is a ongitudinal sectional view through the lock taken ap roximately on the line indicated at 1-1 in Figure 5 and illustrating the locking mechamsminactive and the` bolt retreating knob operatively connected with the bolt.

Figure 2 is a similar view illustrating the mechanism with the bolt engaged iny the keeper as a latch and subject to retraction by the knob.

Figure 3 is a similar view illustrating the position of parts as the same are being moved from the knob control to the locked condition.

Figure 4 is asimilar view illustrating the position of parts showing the bolt engaging actuating mechatraction only after operation o the key mechanism. n 4

Figure 5 is a vertical sectional View taken approximately on the line 5--5 of .Figure 95 4 and on a slightly larger scale.

Figure 6is a sectional view taken approxi'- mate y on the line 6--6 of Figure 3.

Figure 7 is a detail sectionalrvie'w taken approximately on the line 7 7v of FigureA 5. 19

stile in the usual manner.

Figure 8 is a sectional view taken approximately on the line 8 8 of Figure 2.

Figure 9 is a perspective view of the keeper.

Figure 10 is a perspective View of the bolt projecting arm.

Figure 11 is a perspective view of the bolt.

Figure 12 is a perspective view of the rack-bar shifting arm.

Referring to the drawings by characters of reference, A represents a door frame and B the door. The combined lock and latch mechanism includes a housing 15 which is preferably arranged in a mortise in the door A common bolt 16 is mounted within the housing for projection through the bolt opening 17 of the face plate 18 of the housing, from its normally retracted position withinthe housing. The bolt 16 is recessed at 19 to receive the forward end ofva bolt retracting rack bar 20, which forward end is provided with a knuckle 21 receiving a transverse pin 22 extending through the bolt and pivotally connecting `the rack bar withl the bolt. A bolt projecting means is also housed by the housing 15 and the same consists of an arm 23 which is secured to a shaft 24 for turning movement therewith'. The free end of the arm is bifurcated and the furcations 25 straddle the forward portion of the bolt retracting rack bar 20 and engage the knuckle por,- tion 21 thereof. The arm 23 is normally swung in a position to project thebolt 16 from the housing by a flat spiral spring 26, one terminal of which is anchored to a collar 27 on the shaft 24 while the opposite terminal 28 is hooked around an anchoring point. The tendency of the convolutions of the spring 26 to unwind causes the shaft 24 to turn in a clockwise direction and hence swings the arm to the left in Fig. 1, thereby projecting the bolt 16 through the bolt opening 17.

' Inorder' to provide means for normally restraining the bolt against projection and for releasing the same when the door is closed and in registry with the bolt keeper, a depending lug 29 is formed on the bolt adjacent its rear end and said lug is engaged behind an upwardly projecting detent 30 o n a detent lever 31 which is fulcrumed for lateralswinging movement on a pivot 32 which projects upwardly from the bottom wall 33 of the housing. The detent lever is normally swung laterally to dispose the detent 30 in front of the bolt lug 29 vby a coiled expansion spring 34 which engages between the rear notched terminal of the detent lever and the side wall 35 of the housing. A transverse guide' pin 36 extends through the notched rear terminal of the detent lever and the spring 34 lsurrounds said pin. The forward arm 37 of the detent lever impinges against a plunger'38 which is mounted for on the door frame in the usual manner and is provided with an extension 43 disposed at a right angle thereto. The extension is provided with an outwardly projecting finger 4.4 which is adapted to be engaged by the plunger head 4() when the door is moved to the closed position. This effects a relative movement of the plunge;` 38 within the plunger opening 39 and results in effecting through its engagement with, the detent lever arm 37 a lateral swinging movement of the detent lever to throw the detent 30 from engagement with the bolt lug 29 so that the spring 26 functions to project the bolt 16 into the keeper. It is obvious that from this arrangement Vthe bolt 16 is always retracted within thehousing and within the confines of the door edge except when the door is in .closed relation -to its frame. Obviously, this prevents the catching and tea-ringlofthe clothing on the bolt or damage -to t e person which might otherwise be caused if the bolt is in a projected position when the door is open.

`The mechanism includes a bolt retracting means which consists of a spindle 45 extending transversely through the door and through thehousing 15, said spindle being provided with knobs 46 attached to its opposite ends. A pinion 47 is carried by the spindle for turning movement therewith and its teeth 48 are normally designed to engage with the rack teeth r49 on the rack bar 20. It thus follows that when the door has been closed and the bolt v16 projected into the socket 42 of the keeper 41, it is only necessary to manipulateveither of the knobs to turn the pinion 47 in a clockwise direction for retracting the boltto open the door. When the bolt has been retracted through the medium of the knobs, the initial movement of the door to an open position will relieve the pressure of the finger 44 on the plunger 38, thereby allowingthe spring 34 to function to swing the detent lever 31 toa position to dispose the detent 30 in front ofthe bolt lug 29. This, obviously, will hold the bolt retracted against projection by the spring 26 until such time as the door is again closed.

In order to provide means for rendering the knob retractin mea-ns inefect-iveor inoperative so that t e door when closed will be locked against retraction by manipulationl of the knobs, a suitable key controlled tumbler organism is employed for use in connection with a device for moving the teeth of the rack bar 20 out of engagement with the pinion 47. The device for shifting the rack bar consists of an arm 50 which is fulcrumed for swinging movement on a transverse pin 51 and which is engaged by and connected at its free endV 52 with the hooked terminal.28

of the spring`26. The arm 50'is Provided with dependinglaterally spaced knuckles 53 carrying a transverse pi'n54 which also extends through ailongitudinal slot 55 in the rack bar 20. Thel arm 50 is further provided with an upstanding flange 56 at one edge thereof, the purpose of which will be hereafter set forth. The army is also provided with a transversely disposed T-shaped rib 57.

The tumbler assemblage includesy a plurality of tumbler plates 58 arranged in side by side relation within the upper portion of the .housing 15 for relative longitudinal sliding movement on transverse supporting pins 59 which extend through slots 60 provided'in the tumbler plates. The lower ends of the tumbler plates are formed with'T- shaped lnotches 61, the restricted portions 62 of which correspond in length approximately to the Width Aof the T-shaped rib 57 and which restricted portions extend completely through thelower edge of the tumbler plates. rIfhe tumbler plates are further provided with keyhole slots 63 and 64 which are'adapted to be adjusted by their respective keys to an aligned position which simultaneously disposes the T-shaped notches 61 in alignment, it being understood that the notches 61 and the keyhole slots'are normally disposed out of alignment under the action of a'tumbler spring 65 which engages with they rear edges 66 of the tumbler plates. obvious that the rear edges 66 are Ldisposed in alignment when theT-shaped notches 61 and the keyhole slots 63 and 64 are staggered or out of alignment. The keyhole slots 63 are adapted to receive a regular key 67 which is provided with suitable notches 68 in itsshank to correspond with the arrangement of the keyhole slots 63 so that whenjthe keyA is inserted and turned infthevproper direction, the T-shaped notcheswillj be aligned and moved as illustrated invFigures 3 and 4 to a position which'will admit ythelT-shaped rib 57 through the restricted portions 62 of t-he T-shaped notches 61, it being understood that the spring 26 will effect the upward swinging movement of the arm 50. Obviously, this moves the rack bar 2O to a position where its teeth 49 are out of engagement with the teeth 48of the pinion 47. When this occurs, it is apparent that when the door i'sclosed and the bolt 16 shot home into the opening 42 'of the keeper, the knob spindle is inelfectivefor the purpose of retracting the bolt and it is necessary lto insert the key through a suitable key barrel 69 having a keyhole slot 70 for the purpose of again arranging' the tumblers and actuating arm 50 to swing the arm 50 downwardly to cause a 're-engagement of the rack teeth with the pinion. The means for swingingthe arm downwardly by use of the key 67 rconsists of a collar` 1 mounted for rotation in a bearing opening 72 'in the Wall 35 of the-housing, the bearing being It is, therefore,

the master keyhole notches 64 and the collars 71 and 74 are provided with interengaging gear teeth 75 and 76 so that turnin movement of the collar 71 is transmitte to the collar 74. The collar 74 is'provided with a radial cam finger 77 which is designed to engage with the upper edge ofthe flange 56 of the arm 50 tocam or move the arm downwardly. It is, of course, to be understood that after the T-shaped slots 61 have been aligned and moved to a position to receive the T- shaped rib 57, that when thekey is removed the spring 65 functions to again stagger the tumbler plates so that the rib 57 is locked and retained in place to additionally secure the mechanism in its locked condition. It

should also be understood that the movement of thel key in unlocking the door allows the sprin 65 to disalign or stagger the notches 61 be ore removal of the key so as vto prevent the rib 57 from re-ente'ring the notches and to thus maintain the' unlocked conditionv of the bolt. In order to prevent possible forcing of the bolt inwardly by a jimmy or other tool, it will be observed that' the rack bar 2O when moved upwardly to the'position illustrated in Figure 4 has its rear terminal dis osed in alignment with and inv close proximity to a 'rib 78 which projects inwardly from the rear wall 79 of the housing 15. It is, of course, understoodv that themaster key and the master keyhole slots 64 perform identically they'same function asf-the regular key 67 except that the tumbler plate actuating notches will be differently arranged from the regular key while they will be common to a plurality of locks of the same general character. g v v l In Order to provide a permanentmeans operable from the interior of the door to function in the same capacity as the keys, an actuatorelement 80 is operatively connected with the collar 71 for the purpose of turning'the collars 71 and`74. The actuator element 8O has connected therewith a manip-f ulating button 81 whichprojects inwardly of the door and which serves as the means for turning the element. The actuator element has keyed theretoby a key 82 a sleeve 83, which sleeve -is provided adjacent oney of lits ends with gear teeth 84.` A second sleeve `85 is carried by a stub shaft 86 for turning movement therewith and said latter sleeve Ais provided with gearteeth 87 designed to mesh with the gear teeth 84. A spring strip 89 has one terminal 89 anchored to the sleeve 83 and is spirally coiled and loosely wound around the sleeve. as illustrated in Figure 7. The othery end is reversely coiled and partly trained around the sleeve 85 with its terminal 90 anchored thereto. The stub shaft 86 is connected with an a'xiall aligned stub shaft 91 which lies within t e housing 15 and which4 has mounted thereon for turning movement therewith a tumbler plate shifting element 92. The tumbler plates are provided with upwardly projecting lugs 93 lco-related with each other in the same manner as the keyhole o enings 63 and 64 so that turning of the shi ing element 92 in a counterclockwise direction, as illustrated in Figure 1, will cause the ear 94 of the shifting element to engage with the lu 93 to shift the T-sha ed notches 61 into a ignment with each ot er and into registry with the T-sha d rib 57, the element bein further provi ed with a stop ear 95 ywhic en ages with the upper edges ofthe tumbler p ates to limit its turning movement in counterclockwise direction. In'operation, when the button 81 is manipulated with the parts shown in the position in Figure 1, the actuator element 8O will be turned in the clockwise direction indicated by the arrow in Figure 7. This will through the engagement of the gear teeth 84 and 87 effect a. counterclockwise turnin movement of the sleeve 85, as indicated by t e arrow in Figure 7, thereby turningy the stub shafts 86 and 91 to turn the tumbler plate shifting element in a counterclockwise direction, as viewed in Figure 1, causing the ear 94 to engage with the tumbler lugs 93 to shift the tumbler plates to the right in Figure l for disposing the T-shaped notches 61 in alignment with each other and in registry with the T-shaped rib 57 so that the spring 26 will function to swing the arm upwardly for disengaging the teeth of the rack 20 from the teeth-of the pinion 47. From this, it is apparent that the closing of the door and release of the bolt b the detent means will permit'locking of t e door so that the same can only be opened'from the exterior vby use of the regular key or master key. It is apparent that when the button 81 is released the spring strip y88 will function to .return the same to its normal position, permitting the s ring 65 to again Vurge or shift 'the tumb er plates so as to dispose the-T-shaped notches out of alignment. sired to unlock the door from the interior, the button 81 is again manipulated to turn the sleeve 83 in its clockwise direction so that the meshing of thegear teeth 84 and 87y inin the same direction will allow, dueto the itially eiects the turning of the sleeve 85, the

.- stub shafts 86 and 91 and the shifting element 92 in a counterclockwise direction to cause the ear 94 to engage with the tumbler plate lugs 93 and shift the tumblers to a position where the T-shaped notches 61 are in alignment with each other and in registry with the rib 57. Continued manipulation of the button 81 disengagement of the teeth 84 and 87, a urther turnin movement of the sleeve 83 which will cause t e collars 71 and 74 to be turned When it is deto bring the finger 77 into engagement with the flange 56 to throw the arm 50 downwardly and again eiect the re-engagement of the teeth 49 of the rack 20 with the teeth 48 of the pinion 45 so that upon manipulation of the inner knob the bolt will be retracted. `When the button 81 is released, the portion or convolutions of the spring 88 which are now under tension will set up a retrograde movement on the sleeve 83 and will cause the parts to be returned to their normal position. During the counterclockturning movement of the sleeve 83, the gear teeth84 will be again lre-en aged with the gear teeth 87 so as to turn t e shifting element 92 in a clockwise direction to permit of the spring functioning to again stagger the notches 61 so that the lower edges of the tumbler plates engage over and prevent the spring 26 from moving the arm 50 upwardly. When one of the keys is inserted from the exterior with the mechanism in locked condition, it is obvious that the shifting element 92 works in conjunction and simultaneously with the key' actuated means and its mechanism. l v

What is claimedis: l

1. In a locking and latching mechanism for doors and the like, a commony bolt carried by the door and normally projectable 95 into a kee er on the door frame, a turnable actuating ob, interengageable means carried by the knob and bolt for establishing a connection therebetween to effect the retraction -of the latter by turning of the knob when saidvmeans are engaged and a key controlled mechanism for effecting the engagement and' disengagement of said means to render the knob respectively effective and ineiective, said key controlled mechanism in- 1 cluding a plurality of shiftable tumbler plates having normall disaligned notches in one edge adaptedto, aligned by a key, a member for normallyjeecting the disengagement of` the Vknob and bolt connecting no means, said member having a 'rib adapted to enter the notched eds of the tumbler plates when aligned by the ey and means turnable by and with thekey forv engaging and moving said member to a positlon to re-engage the knob and bolt connecting means.

2.'In a combined latch and lock mechanism', a common lock and latch bolt, a knob, means for connecting the knob with the bolt for retraction by the knob, a common means 1m for projecting the bolt and disengaging the knob and bolt connecting means and key actuated means for respectively engaging the knob and bolt connecting means, retaining the same in connected relation or permitting 126 the same to be disengaged.

3. In a combined latch and lock mechanism for doors or -the like, a common lock and latch bolt, a turnable knob,means carried by the bolt and means, carried by the knob 1:0

v for connectin the same to effect the retracrtion of the bo t upon turning 'of the knob, a common means for projecting the bolt and disengaging` the knoband bolt connecting 5 means and a. key actuated means respectively operable to engage the bolt and` knob connecting means, to allow for their disengagement or to retain them engaged.

Signed at New York, in the county of New lo York and State of New York, this 23rd day of April, A. D. 1928. v l

ERNEST FLAGG.

I .so

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