USRE3519E - Improvement in door-latches - Google Patents

Description

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RUSSELL A-ND ERVVIN MANUFACTURING COMPANY, OF NE\V BRITAIN, CONNECTICUT, ASSIGNEES, BY MESNE ASSIGNMENTS, OF MARSHALL T. LINCOLN.

Letters Patent No. 42,954, dated May 31, 1864, lreissue No. 3,519, (lated .'Time 22, 1869.

IMPROVEMENT IN DOOR-LATCHES.

The Schedule referred to in these Letters Patent and making part crf the same.

To all whom. 'it may conce/rn:

` Be it. known that MARSHALL T. LINCOLN, of Washington, in the county of Washington, and District of Columbia, was the iuventorof a new and useful Improvement in Locks; and that the following is a full, clear, and exact description thereof, and of its inode or nianuer of operation, reference being had to the accompanying drawings, and to the letters of refer- 'cnce marked thereon, and making a part of this specification.

This inventionrelates to a construction of lock, that by the closing of the door, causes the latch-bolt not only to fasten the door when closed, but also at the saine time,l acts automatically to lock such latch, by the operation of a lever or device which is moved by the` latch, as tha-tis actuated by the closing of the door, so that the latch or the nlechanieal device fastening the door cannot be moved or operated so as to allow the door to he opened without iirst,lby a suitable contri vance, such as a key, or its equivalent, being released from the locking-bolt or device.

This loch is also so constructed thatl it can be attached to the jamb or casing, instead of to the door, as has heretofore generally been the case.

Figure lis a front view of a portion of the doorcasing and door and lock, as seen from the inside.

Figure 2 is aview of the face of the casing, with the loci( attached thereto.

Figure 3 is a cross-section through the door-casing aud door and lock-shell.

Figure 4 is a plan view of the look, seen from the inside, a portion of the shell of the lock .being removed. v

Figure 5 is an edge view of the lock, as seen from the outside, the casing being removed. Y,

Figure 6 is a det-ached representation of the portion of the shell of the vlock removed in lig. 4, and shown in dotted line-s in iig. 5. i'

Figure 7 is a detached representation of the main latch-lever, or catch, which looks the door. y

Figure 25 is a detached representation of the sliding or locking-bolt. p

A is the lock-shell, usually of cast-metal, and then niade in one piece, and provided with the necessary slots and bearings for the support and arrangement l of the various parts of the look, so as to require the least amount of boring and iitting; and

A (shown at large in iig. (5)is the back plate.

In tigs. 2 and 3 is shown the manner in which the shell is let into and secured to the casing, a being a vertical partition, extending through the shell lengthwise and fori'ning a part of it, and which serves both as a frame-work, and also renders it impossible vto force cti' the lock. from the outside, even when the outside yscrews are removed, such partition c being insertedinto a suitable recess of the casing, as shown in fig. 3.

Bis the main latch or latch-lever, having its fulcruin at the bearin g 1, and the profile of which is shown in fig. 7.

Iii-iig. 3 is seen the manner in which itsecures the door .when shut, its rectangular shoulder catching against the guard-plate b on the edge of the door.

C is the outside operating-lever,,having its fulcrum at the bearing 2, and tinishedat its upper end with an ornamental knob, C', which partially protrudesthrough the shell at a point outside of the door-line. The lower end of such lever has a rectangular bend, as shown in figs. 4 and 5, so that it may operate upon the inner end of the main latch-lever B, which. is at right angles with the lever C.

A spring, c, attached to the lever B, and vacting against the inner shell A', keeps such lever in a position to fasten and hold the door closed, and also, through its action upon such lever B, keeps the knobhandle of lever C protruded through its orilce in the shell, as shown in figs. 3 and 5.

Pressure upon the knob C and knob-lever C operates upon the latch-lever or catch B, so as to throw it back far enough to permit the door to pass by or escape it., when the door is swung open.

D is the regulating or locking slide-holt, sliding in slots in the shell, the posit-ion of which is parallel to and a short distance from the lever-latch ,.B, and the inner end of which is provided with a pin, d, which is operated' on by the key-holt G, so as to slide the boit D inward.

Such bolt is forced outward, as shown in fig. 4, by a flat spring, e, and when in such position a lug, j, on such bolt passes over and rests upon a stud, y, on the lever B, so that it is impossible to force the leverlatch B back, so as to open the door without first sliding back the bolt D, so as to release such stud g from the control of the lug f.

Such bolt D may be slid back either by the action `of the key-bolt G on the pin d, as before mentioned, or by direct action upon the outer end of such bolt D by the cam E, pivoted to the latch B, one face of. which passes through the broad surface at the end of the latch B, the other end lying against the ond of the bolt D, and is operated by thc hand or thurnb, pressure on which causes the bolt D to slide in, and thus release the stud ofthe latch, so' that the latch B can be pushed back to permit the opening of the door.

Then it is desired to open the door from without, the boit D is caused 'to slide in by the action of the key-bolt G on the pin [Z of the boit D, and the iinob C' is pressed in, the lever connected with which acts against the end of the lever connected with the latch B, and causes such latch to be pushed back, so as to permit the door to be opened.

Thelever C has no connection, either with the lockolt D'or with the cam E.

' and the door to befully closed, when the latch B takes the position shown in fig. 1,. when the bolt D again slides out,.and thelatch isI'OCked.

F is a sliding catchfor fastening the bolt D in any position, and is, of course, operated solely from the inside .of the room.

When it is desired to hold the bolt D in, :the catch F (such bolt being pushed in)'is forced down, and enters a slot, 3, inl such bolt, and the bolt is held sta-l tionary in that positionv until released by the catch.

When the bolt is in lthis positiomtbelock becomes a simple latch to open the door from within, the knob K is taken hold of`and thelatch B isl pushed back'by the thumb or finger, and the door opens -v To open :the door from without, the protruding knob of the level'4 C is`pushedf in, which pushes back the latch B, and the door is opened.

lVheu it is desired to hold the bolt D out, the catch F is forced down, when such boltvD is out, into the slot 4 in such bolt.

This makes the lock a dead-lock, or burglar-proof lock. Y lVhen the bolt D is held in` this posit-ion, it is impossible to pick the lock from the outside, with or without the key, for any7 picking-instrument, after entrance through the .key-hole, would have to bore through the partition ofthe lock-shell in order to get to the catch, and then it would be impracticableto movev the catch vertically, so as to release the bolt.

When the lock is tobe used as a night-latch, the catch F is raised and wholly disengaged from the bolt `D, which then slides out, as shownin fig. 4.

In order to then open the door from the inside, it is necessary that pressure -should first; come upon the. cam E, which forces in the bolt I), and thus permits the latch B to be pushedV back, which allowsthe door to open. l

"To open the door from 'wit-hout, it is necessary to use the key, which, actingupon the tumblers H, forces down the key-bolt'G against the pin d, thus sliding in the bolt D, and at the same time the knob-lever C the door to be opened. v

The lock is ithus. capable of acting in three different modes, and as three distinct mechanisms, although forming but one machine. that is, as a simple latch, or as a night-latch, or as a burglawproof lock.

What is claimed as new, and is desired to be protected by Letters Patent, .is--' 1. The combination ot' the latch B and sliding or locking-bolt D, constructed and arranged so thatboth are acted upon or operated-by the closing of the door,- and that the latter will,'as the former moves back to fasten the door, lock or secure the latch, for the purposes set forth.

2. In `combination with such latch B and 'lockingholt D, the arrangement of the cam E, for moving or sliding back the bolt D, for the purposes set forth.

3. The combination and arrangement of the latch B, knob C', lever G, and sliding-bolt D, opelating substantially as and for the purposes set forth.

4. In combination with the latch B, and vsliding or locking-bolt D, the arrangement of the key-bolt G, or its equivalent, for moving back such bolt, for the purposes specified.

.5. vThe combination and arrangement of the tumblers H, key-bolt G, latch B, and sliding bolt D, for the purposes specified.

6. `The combination of the latch B, and cam E pivotcd to said latch, substantially as and for the purposes specified. l

RUSSELL & ERWIN MFG CO lVitnesses: By M. J. WOODRUFF, Attorney.

FRED. B. SEARS, H. HOLDBEGE.

is pushed in, which withdraws the latch B and allows

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