US398016A - Combined latch and lock - Google Patents

Description

(ModeL) G. WORRALL UOMBINED LATCH AND LOOK. No. 398,016. Patented Feb. 19.1889.

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Q VHMQM co 31-10014 I'oz George Wbrrall UNITED STATES PATENT OFFICE.

GEORGEWORRALL, OF CHICAGO, ILLINOIS.

COMBINED L'ATCH AND LOCK.

SPECIFICATION forming part. of Letters Patent No. 398,016, dated February 19, 1889. Application filed August 19, 1887. Serial No- 247,349. (llllocleh)v ToaZZ whom it may concern.-

Be it known that I, GEORGE WORRALL, a

subject of the Queen of Great Britain, resid ing drawings, and to the letters and figures of reference marked thereon, Which form a part of this specification.-

My invention relates to a combined latch and lock for doors, in which a key is adapted to be used as well as the door-knob itself, each for withdrawing the. bolt into its casing, as in unfastening or unlocking a door in opening the same.

The objects of my invention are, first, to provide. the door or look bolt with a construction that will automatically lock the bolt and the door whenever the door is pushed to its closed position and the bolt thrown back by the pressure exerted on its outward end against the resistance of its spring, and allowed to resume its normal or looking position, so that said bolt can be then moved back into its casing only by means of the lock-key or by the inside door-knob; second, to so construct the bolt that in its ordinary use that is, by means of the key and the doorknob-said bolt shall always be left unlocked when the door is open.

The leading or main principle pertaining to the construction of this device is that when the door having the lock suitably secured therein is opened in the ordinary mannerthat is, by taking hold of the door-knob and turning it to throw the bolt back,or by inserting-akey and turning it-the bolt on resuming its outermost condition shall .be free, or, in

other words, unlocked in its said outwardlythrust state, and hence free to be pushed back into its casing; but that if so pushed back by othermeans than the knob or key operating through appropriate connections and the cranked follower, and said bolt allowed to resume its outwardly-thrust condition, itshall be no longer free, but be locked in that position.

the top plate removed in connection-With one of the ordinary tumblers, the bolt being thrust out to the full extent of its throw, and being in its free orunlocked condition. Fig. 2 is an illustration of the same construction as that shown in Fig. 1, the bolt having been pushed part way back by power applieddirectly thereto and not by means of either the knob and its shank'or the key and its connections. Fig. 3 is an illustration of. the lock with the top plate removed, and also the tumbler (or tumblers, as the case may be) and the tumbler-plate removed, and show: ing the position of the dog in its uncaught condition (at front) and yet inoperative state, with the bolt moved part. way back, as when itis being moved backward either by the doorknob and the cranked follower or by the key, the tumbler-plate, and the cranked follower. Fig. 4 is a similar illustration to that-of Fig. 3 in all respects, excepting that it shows the bolt moved slightly farther back and the dog -in its freshly-caught condition (at its front end) as the bolt is moving outward after being relieved of back-pressure exerted thereon, either by the knob and the crankedfollower or by the key, the tumbler-plate, and the cranked follower.

Like letters of reference are used in, the specification and the drawings to designate the same parts. A

A is a door-bolt or lock-bolt, as it is eon1-,

monly called, working through an opening in the face-plate.

a is a projection or lug having its front top inclined downward to a point in line with the upper surface of the bolt A, on which said projection is formed, the rear surfaceof said lug or projection being vertical.

a is a spring secured in the lock-casing, so that one end thereof bears on the rear end of the bolt A-to press it outward.

words, it is designed for connecting and dis a is an anti-friction wheel or roller in the outer end of the bolt A, said wheel or roller being designed to act upon the keeperin closing the door. v

a is a flange standing at right angles on the .inner surface of thelock-c'asing, and over which a notched portion of the rear or bent end of the boltA fits loosely, so as to be held thereby in true line in its reciprocationsbackwardand forward.

1, is a tumbler.

l1 isa spring secured to and acting upon the tumbler in the ordinary manner.

C is the tumbler-plate, upon which rests the tumbler B.

I) is a cranked follower.

'E is a spring-actuated lever-dog.

e is the spring thatis secured by one end at or near the upper partof the lock-casing, its other end acting on the front end of the lever dog to throw said end downward.

g" is a pivot and having a projection, the pivot part serving as a fulcrum for the lever dog, and the projection serving as a guide-pin for a slotted sliding lever, G, hereinafter described. g

F is a supplemental dog, or rather a dog catch-piece, or what may be. simply termed a catch-piece.

. f is aspring, secured at its rear end to the upper part of the lock-casing, having its free end acting upward against a rearwardly or horizontally projecting upper part of the dog catch piece, thereby tending to throw the lower end of the dog catch-piece to the rear.

f 2 and f" are lugs or pins on the dog catchpiece.

G is a sliding slotted trip-lever, or a slotted trip-lever adapted to slide on the projection forming the extension of the pivot g forming at times a connecting device, or, in other connecting the bolt A with the lug or pin f of the dog catch-piece 1*.

g is a spring, one end of which rests loosely on the bolt A, and having its other arranged to press upward the forward ('TKIO'f the trip-lever G.v v I g is a slot in the trip-lever G.

g is a projection within the slot g" or adj a cent tln reto, or defining a part thereof. V

I1 is the lock-casing, in which the operative parts of thelock mechanism are secured and work.

I is the key-hole in the lock-casing.

J is the opening (to receive the shank of a door-knob) in the cranked follower D at its elbow part, and within the part that (extended within a circular opening in the lock casing) serves as a pivot for said cranked follower to oscillate upon.

The bolt A is placed in horizontal position in the casing II to be reeiprocated in the direction of its length. It may be provided with the ordinary locking devices in addition I to the one shown and forming a special fea ture of the invention herein described. i

\Vhile but one tumbler-,1 provided with a spring, I), is shown, others may be used of a .like orderor of any usual kind, and any or dinary form of a tumbler-plate instead of the tumbler-mate C may be employed, it only be ing necessary that they shall be adapted to each other and to the key and the bolt, so as to be operative for the purpose of giving the the lever-dog E being elevated in opposition to its spring, so as to release the bolt A from its locked condition, whereby the said bolt is free to be. moved backward in the casing by the tumbler-plate C, or by any part moved by said tumbler-plate G, or by any key or other device that might be employed therefor. In the drawings the tumbler-plate is shown so constructed that in its backward movement it strikes against the side of the lower arm of the cranked follower, the other side of said arm striking against the downwardly-bent end of the bolt, and thereby imparting backward movement thereto.

-Instead of the tumbler-plate, as illustrated in the drawings, some other means of operating the bolt to withdraw the same may be used-as, for instance, in a rim-lock a tumbler-plate of a different order may be usedit being necessary, however, whatever he the tuml'iler-plate or means used for operating the lower arm of the cranked follower, and whatever he the means used for operating to withdraw the belt, that said parts be so arranged with relation to the cranked follower and the bolt as to engage and move the cranked follower to the extent of causing its upper end to engage the rear end of the lever-dog and move the same suificiently far to cause its other end to be released from engagement with the lock-bolt before strain is brought thereon by said tumbler-plate, key, or other moving part or projection to force backward the bolt.

The rearend of the bolt A is turned at right angles to its main portion, and is slotted or notched to fit over the flange (6, whereby the said bolt is in a measure guided in its reciprocations. A portion of the bolt A on the side near the main casing is cut away in order to allow a space for the lower arm of the cranked follower l) to work in its oscillations. Said arm terminates in a ball-like projection, as shown in the drawings, which receives the impact of the tumbler-plzuze C in its back.- ward movements, and is thereby driven into contact with theturned or bent end part of the bolt A, thereby forcing said bolt back, but not until the upper horizontal arm of 11m cranked follower I) has engaged the rear end of the lever-dog l) and elevated its other end seems 8 out of the pathway of the projection or lug a, thereby freeingthe bolt, so that said bolt may be easily pushed back to its utmost limit against the resistance of its spring a.

The cranked follower D is of the form of a bell-crank lever, the part at the angle being enlarged to form a'pivot or journal-like por tion to fit within acircularopening in the casing '11, in which opening it makes a partial turn each time when operated either by means of the key and tumbler-plate'or by means of a door-knob whose squared shank is intended to fit into the opening J in the cranked follower.

The forward end of thecranked follower has such relation to the rear end of the spring lever-dog E as always to engage therewith,

when the boltA is fixedly locked by the front end of said lever-dog taking against the projection on the bolt or within a suitably-shaped recess within. the bolt, before the bolt is started back, whether the bolt be forced back by means of the key and its connections orby the door-knob and its connections; but

said'arm of the crank follower, as operated by the usual means at other times, is sufficiently remote from the rear end of the leverdog E to not interfere with the movement its spring e tends to impart thereto. Consequently when the bolt A is pushed back into the casing by its outer end coming into contact with the keeper secured to or forming part of a door-jamb, the horizontal arm of the cranked used to catch at times the.front end of the spring lever-dog E and hold it against the action of its spring 6, so as not to interfere with the backward movement o the bolt A. Said dog catch-piece is arranged in connection with the sliding slotted trip-lever G so as to be tripped at times to release the spring lever-dog E. When the dog catch-piece is free to move in response to the action of its springf, its lower end passes to the limit of its rearward throw, and the catchpart proper thereof stands ready to catch beneath the front end of the spring lever-dog E and hold it securely against the action of its spring 6 and out of contact with the projection a on the bolt A.

The lug or pin f, on the dog catch-piece F serves asa means forthe forward end of the sliding slotted trip-lever G to engage in the act of tripping said dog catclrpiece, the enlarged part of the slot and the spring 9 enabling the notched front end part of the triplever G to rise and seize the lug f and hold on thereto for a moment, as the trip-lever is drawn rearward by the bolt, the lower en d of the dog catch-piece F being thereby so far advanced to the front as to release its catch from the front end of the lever-dog E, and immediately thereafter the angular or point-like part 9 forming one side of the entrance to the horizontal portion of the slot g, coming intocontactv with the-proj ec'tion'on' pivot 9 and cansing' the rearwardly-drawn trip-lever G to be suificiently depressed to release its notched front portion from its hold on the lug'f? The lug or pin f may ormaynot be formed on the bent-over upper part of the dogcatchpiece F. When formed thereon, however, it may serve as an additional security to other parts in insuring that the trip-lever G shall become disengaged from thelug or pin f The other and usual means of causing this disengagement as well as engagement of the forward end of the trip-lever G is, as above stated, theslotted part of the trip-lever about the slot g in connection with the projection .of the pivot-pin 9 the said projection extending. within the slot and. serving to guide the trip-lever and enable its forward end tocatch. against or over the pin or lug f each time as the bolt A (to which the trip-lever is pivoted) reaches its outward limit and commences to be withdrawn into the lock-casing H. 'This trip-lever, besides'being pivoted to the bolt A, so as to be carried therewith in its reciprocations, is provided with a spring, g, which latter tends to press upward constantly the forward end of the trip-lever.

The shape of the slot at the enlargement thereof is such as to permit the trip-lever G to'be thrown upward as soon as its forward end in its advance movement by'the outwardly-moving bolt has arrived at a point to permit the catch to take over or against the pin f on the dogcat( h-piece F and to be retained thereon as the trip-lever is being drawn backward by the bolt to draw' back the top end of the dog catch-piece and advance the lower end thereof to release its catch part from the front end of the spring lever-(log E and immediately thereafter release the trip-lever from engagement with the pin f The horizontal part of the slotinv front of the said enlargement allows the trip-lever to slide forward and backward upon the pivot projection without its forward end being either raised or lowered after the enlarged part of the slot has passed rearward of said projection. In consequence of said horizon-- tal portion of the slot the forward partofthe trip-lever is alwaysheld close to the lug or pin f so that it readily engages therewith, taking hold upon the pin'or lug f the mo ment the pivot projection is within the said\ enlargement of the slot.

The angular or pointed projection g is at the entrance from the rearward to the horizontal portion of the slot-g The inclination rearward of said pointed projection g is that resulting from the peculiar enlargement of the slot g, as shown, and serves as an inclined bearing, acting against the pin projection-to cause the depression of the forward end of the trip-lever G just as the latter moves backward after having tripped the dog catch-piecefrom its hold on" the front. end of the spring lever-dog, or each time the bolt A is moved backward from its extreme outward position into the lock-casing. .The result of this construction and arrangementof parts is that the for ward end of the trip-lever, which is notch ed,-

as shown, to allow a part thereof to catch over the lug or pin f, is soon withdrawn from engagement with said pin or lug, but not until it has carried it along so far as to cause the lower end of the dog catch-piece F to release its hold-on the forward end of the spring lever-dog 1C, and thus allow the forward end of said spring lever-dog to be brought down by the action of its spring upon the bolt A, providing thc'horizontal arm of the cranked follower l)'does not prevent this movement, If, as the bolt A commences moving backward, the cranked follower D be not moved to depress its horizontal arm, either by means of the door-knob and its shank or by some other means, as by the sliding tumbler-plate, or the l e or other device, then the front end of the spring lover-dog will remain at rest upon the top of the boltin front of the projection a, and hence will offer no resistance to the backward movement of said bolt; but upon the bolt being returned to its extreme outward position, the horizontal arm of the cranked follower in the meanwhile not having been brought down to interfere with the rear end of the spring lever-dog, the front end of the said lever-dog is gradually forced upward against the action of its springby the inclined part of the projection abeing carried beneath the same, and immediately falls behind said projection the moment ithas passed forwardand thereby locks the bolt. In thiscondition. the bolt is held against being forced inward or within the casing by pressure on the front end or projecting part thereof. In order to unlock the bolt tllCl'Gitfl-Gl','li3 isnecessary in the ordinary use of the lock to make use of the means heretofore stated-via, either the door-knob and its connecting parts or the key and its einineetionswherebyto produce such downward movement of the horizontal arm of the cranked follower I) as will relievethe lever-dog E from engagement with the project ion (1 on the top of the bolt A.

The lug f on the catch-piece 11 may at times be of service in. assisting the sliding ll'lp-lOVOl G in becoming released from the lug or pin f? on said catch-piece, as when the slot G may have become considerably worn, as by the angular point 9 being so worn away as not to be as effective as'designed in cansing the downward movement of-the front end of the sliding slotted trip-lcver G.

It will be observed from the above description that the preferred mode of using the lock. is just as in the ease of the ordinary locks. with the exception that when it is desired to securely lock the hmk-lmltltsel'l in seams its outermost position for locking the door, the door is simply pushed to its closed position, whereby the lock-bolt, striking against the keeper, is forced back and then allowed to recover. The small anti-friction wheel or roller a in the outer end of the bolt A is designed to facilitate this manner of q closing and locking the door and at the same time locking the door-bolt. I

g It will also be observed that whenever the door-knob and its shank are employed, or the key and its connections, the forward end of the horizontal arm of the cranked follower is always brought down into such position as to prevent the spring dog-lever from engaging the bolt to lock the same.

.llavin g thus fully described my invention, what I claim isl. The combination of a bolt, a lever-dog for holding the bolt in its outermost position of projection, a catclrpicce for holding the lever-dog out of engagement with the bolt, and a trip-lever connected with the bolt and piece, substantially as described.

2. The combination of a bolt, a lever-dog for holding the bolt in its outermost position lever-dog out of engagement with the bolt, a trip-lever connected with the bolt and provided with a projection to engage the catchpiece, and a follower for operating the bolt, said follower having a projection for engaging the lever-dog to lift it out of engagement: with the bolt, substantially as described.

3. The combination of a bolt and a leverdog for holding the bolt in its outermost posit ion of projection, a catch-piece for holding the lever-dog out of engage'lnei'it with. the bolt, a trip-levcr C(HIIIGGlLGtl with the bolt and provided with a projection to engage the catchpiece, a follower for operating the bolt, said follower having a projection for cngaging the lever-dog to lift it out of engagement with the bolt, and a tumbler and a tumblerplate engaging said follower, substantially as described.

at. The combination of the bolt A, the sliding trip-lever G, having the slot r the pivot 9, having an extension or projection working within the slot g and against its projection 1 the catch-piece F, havingthe lug f the spring lever-dog E, and the projection a or its equivalent on the bolt A, substantially as and for the purpose described.

5. The combination of the bolt A, having the projection a tl1ereon,-the sliding trip-lever G and its spriiig g and slot g, a pivot, 1 secured to the casing ll, with its other end forming a projection within the said slot, the dog catch-piece F, having a spring, f, and lug f, the leverdog E and its spring e, and means for reci in'ocating the bolt A, substantially as l and for the purpose described.-

(i. The combination of the bolt A, having the anti-friction roller (0 the projection o, and spring (1, the trip-lever G, pivoted to the bolt provided with a projection to engage the catchof projection, a catch-piece for holding the ITO and.provide d with a slot, g, enlarged atits rear end, the pivot 9 and the lever-dog E, working thereon, the spring 6, the extension of the pivot g projecting within the slot g of lever G, the catch-piece F, having a spring, f, and lug f the cranked follower: D, and means for operating said follower, substantially as and for the purpose described.

7. The combination of the spring-actuated bolt A, having a projection, a, thereon, asliding lever, G, pivoted at its rear end to the bolt A, having a slot in its middle portion and notched or otherwise provided with a catch CHARLES A. FoLsoM, NATHAN WHITMAN.

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