US364574A - Combined latch and lock - Google Patents

Description

(ModeL) W.-E. BUDD & F. SICKELS. GOMBINBD LATCH AND LocK.

No. 364,574. Patented June '7, 1887.

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yIIlIIIIIIIIIII/IA I E H n UNITE STATES PATENT OFFICE.

WILLIAM E. BUDD, or CHATHAM, NEW JERSEY, AND FRANK SICKELS, or CHICAGO, ILLINOIS.

COMBINED LATCH AND LOCK.

SPECIFICATION forming part of Letters Patent No. 364,574, dated June '7, 1887 Application filed February 10, 1887. Serial No. 227,170. (Modch) such as will enable others skilled in the art to which it pertains to make and useit, reference being had to the accompanying drawings, which form part of this specification.

Our invention relates to an improvement in a combined latch and lock; and it consists,

first, in a combined latch and bolt, the combination of the latch-bolt, the weighted keypost, and the pawls pivoted to the key-post; second, the combination of the key post, weighted upon one side, and the pivoted pawls, provided with arms for closing the key-holes;

third, the combination of thelatch-bolt, the

key-post, and the stop which limits the rotary movement of the post; fourth, the combination of the key-post, the pawls, the stop provided with a projection, and the latch-bolt; fifth, the striking-plate provided with a projection, and the not which screws upon the projection; sixth, an escutcheon-plate provided with projections on its inner side to catch in corresponding recesses in the lockframe, as will be more fully described herein-' after.

The objects of our invention are to combine in a look a catch and the bolt upon a single casting, and to have them project through the same opening in the face-plate; to attach to the key-post a projection upon one side which serves both as a stop and as a weight to cause the post to automatically continue its movement after it has been turned partially around, and thus cause it to lock the latch-bolt, in case the key should be withdrawn before the keyposthas turned far enough to unlock the door; to so construct the key-post that when turned in one position it will lock the latch-bolt and in another position will leave it free to move; to so construct thelatch-bolt that it will serve for eithera rightor left hand door without in any manner affecting the working of thelock;

' to provide a face-plate which will serve for a square face or right or left bevel at any angle; and to so construct the escutcheon as to avoid the use of the usual key-hole plate found in connection with locks used with a flat key, and which escutcheon is adapted to doors of different thicknesses.

Figure 1 is a side elevation of a lock embodying our invention, the side plate being removed so as to show the internal construction. Fig. 2 is a perspective of the combined latch-bolt alone. Figs. 3, 4, and 5 are detached views of the key-post. perspective of one of the ratchetsconnected to the key-post. Fig. 7 is a detached view showing the face-plate. Fig. 8 is a section of the striking-plate usedin connection with our lock. Fig. 9 is a vertical section of the escutcheon-plate showing the projections on its inner side. I A represents the side plates of the latchcase, which is to be inserted into the door, and B the faceplate, which is made in a separate and distinct piece and pivoted thereto. Upon the inner side of this face-plate B, at or near its center, is formed the flange or extension 0, which extends in between the two side plates of the latch, and through which extension 0 and the side plates is passed a screw, rivet, or other suitable pivotal device, D. The opening through this extension C is enlarged at the ends, so as to allow the face-plate to turn upon the screw or rivet D to such an extent as to be adapted to stand at any desired angle to the latch-case. This faceplate, being loosely attached to the latch-case, can be adjusted independently thereof, and hence made to correspond to the inclination ofthe edge of the door under allciroumstances.

The latch E and the bolt F are formed to gether and in a single piece, as shown, the bolt being preferably placed below the latch. This latch-bolt is made, preferably, of the form here shown, and has the spring G applied to it in the top of the frame, so as to keep it always pressed outward in the usual manner. The rear edge of this latch-bolt is rounded away at B, and in opposite sides of this edge are made suitable recesses H H, which are separated from each other, and in which the Fig. 6 is a door is closed.

outer ends of the pawls connected to the keypost catch when they drop downward for the purpose of preventing the key-post from being turned until the proper key has been inserted.

The key-post I has a rounded projection, J, extending out upon one side, so as to correspond to the rounded edge B of the latchbolt, but has nothing formed upon its other side. This projection Jis recessed, as shown, so as to receive the pawls K, which are pivoted upon one corner thereof and which have their outer ends shaped so as to catch in the recesses H H in the latch-bolt. Upon the inner edges of these pawls K are formed the curved arms L, which,when the outer ends of the pawls drop downward, extend across the key-hole in the post, so that when the key is inserted its rounded end must first force back the arms L before it can pass on into the post. \Vhen the arms L are forced backward by the insertion of the key, the outer ends of the pawls are forced inward until they strike against the shoulders on the projection J, thus withdrawing them from the recesses H H and leaving the key-post free toturn.

Vhen the projection or extension upon the key-post is turned toward the latch-bolt, the same fits snugly against the rear edge, 13, of said bolt and prevents it from having any movement whatever. In this position the latch-bolt is rigidly locked in place. Vhen the key-post is so turned that the side which has no projection formed upon it is toward the latch-bolt, the latter can be moved freely backward in the casing against the action of the spring by means of the knob in the usual manner. Through both of the side plates of the latch, and connecting with the opening for the key-post, are the openings I, in which the stop Q is made to engage. This stop Q, which is formed as shown, has its inner end made pointed so as to catch in the recess which is made in the side of the key-post on the opposite side from the projection J, and against which stop the opposite ends of the projection J strike, so as to limit the distance that the key-post shall be turned around. Upon the inner end of this stop is formed a small projection, O, which corresponds to the notches formed in opposite edges of the key. Unless these notches correspond to this projection 0 when the key is inserted, the key cannot be turned, because this projection on the stop will catch against the edge of the key, and thus prevent it from turning the key-post. \Vhen the key is inserted and the key-post is turned until one end of the projection strikes against the upper outer face of the stop, the latch-bolt is left free to be moved by the knob, and said bolt can be operated either by the knob or will automatically operate when the XVhen the key-post, however, is turned until the opposite end of the projection J strikes against the. opposite side of the stop, the combined latch and bolt is locked rigidly in position and will neither operate automatically nor allow the knob to be turned.

In order to prevent the keypost from being turned without the use of a proper key to lock the latch-bolt in position, the pawls are made to automatically drop downward at their outer ends and at the same time move their arms L across the key-hole, so that nothing can be inserted therein except the proper key. Vhile the outer ends of the pawls are thus dropped down, if it should be attempted to turn the key-post, the outer ends of the pawls will strike against the square shoulder of the recess H, and in case the key-post has not been turned fully around the outer ends of the pawls will strike against the shoulder at the upper end of the recess H and thus prevent the post from being turned any farther around. 7

Should a false key or instrument with which it is attempted to unlock the door he withdrawn, even for a moment, the projection J, acting as a weight upon one side of the post, will cause the post to turn around until the lower end of the projection J strikes against the stop Q, when the outer ends of the pawls at once drop downward again into the recess H, thus locking the post again, as in the first instance. The two sets of recesses II II are thus used, so that the recesses II will act as a safety-guard upon recesses H. These recesses H H need not correspond to each other in opposite edges ofthe latch-bolt, but can be placed in any desired relation to each other, as may be desired, and thus while the lower ones may be operated by some false key or implement the upper ones will not be. Any desired number of these pawls may be attached to the projection J.

The striking-plate R is made rounding, as shown, where the latch-bolt comes in contact with it, and that end S which bears against the molding on the door-jamb is made screwthreaded, so as to receive the adj usting-nutT. This screw-threaded end S enters a hole or recess made in the molding, and then the screw T is moved so as to bear against the outer face of the molding, and thus secure the plate rigidly in position. This screw-threaded end and nut allows the plate to be adjusted to the molding on the door-jamb.

Passed through the eseuteheon and one of the side plates of the latch is a turning bolt, U, which is cut away upon one side, as shown, and is provided at its outer end with a thumbpiece, V, by means of which the bolt can be readily turned. This bolt passes through the frame of the latch at any convenient position in relation to one of the edges of the latch-bolt, so that when the cut-away portion of the bolt U is turned toward the edge of the lateh-bolt the latter can be freely moved. \Vhen, however, the full edge of the bolt U is turned toward the edge of said bolt it is locked rigidly in position without the use ofa key. Two of these bolts U may be used from opposite sides of the door and each one made independent of the other. Where these bolts are used, persons upon either side of the door can use them, and thus prevent the latch from being operated by means of a key.

The escutcheon-plate 'W has two projections, X, secured to its inner side, which projectiOnS catch in suitable recesses made in the top and bottom edges of the latch-frame. Where escutcheonplates are used upon both sides of the door, the projections pass each other without in any manner interfering, and thus they are adapted to be applied to doors of different thicknesses. In this escutcheon plate, just above the knob, is made a suitable recess, Y, into which the key-post projects. This recess Y tends materially to shorten the key, and at the same time allows the hand free access to the knob, leaving the key practically finsh with the surface of the door. The key being close to the knob, and yet-not interfering with the hand while operating the latch, allows the working parts of said latch to be placed nearer together. This escutcheon-plate avoids the use of the usual key-hole plates found in connection with locks having flat keys;

Having thus described our invention, we claim 1. In a combined latch and lock, the combination of thelatch-bolt having recesses formed in its edges with the key-post having aweight or projection formed upon one side, and the pawls which automatically drop outward and catch in the recesses in the latch-bolt, for the purpose of locking the parts in position, substantially as specified.

2. The combination, with the key-post, of theautomatically-actingpawlspivotedthereto, and which are provided with the arms L, for

closing the key-hole, substantially as shown.

3. The combination of the latch-bolt, the key-post provided with a projection or extension upon one side, and the stop which limits the turning movement of the post-,substantially as set forth.

4. Thecombination of thekey-postprovided with a weight or projection upon one side, the pawls pivoted upon this projection or extension, the stop which limits the turning movement of the post, and which has a projection upon its inner end to engage with the key, and the latch-boltvprovided with recesses in its edge adapted to engage said pawls, substan tially as specified.

5. The striking-plate provided with a screwthreaded prong or projection, in combination with a nut which is applied thereto, substantially as shown.

6. An escutcheon-platc provided with pro jections upon its inner side, made integral therewith, and which catch in recesses made in the edges of the lock-frame, substantially as described.

In testimony whereof we affix our signatures in presence of two witnesses.

, WILLIAM E. BUDD. FRANK SIOKELS.

Witnesses:

WARREN O. NOYES, GEO. N. ALLEN.

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