US381293A - -taylor - Google Patents

Description

, (No Modell.) I shets-Sheet 2. l W. H. TAYLOR.

y LOCK. 4 n No. 381,293.l l Patentd'Apr. 117. l18`88- 0 all WITNESSES lNvENToR'. Wwf El* or I ByZZJ' 'iolmeys n f l UNITED STATES PATENT OFFICE wARRRN H. TAYLOR, on sTAMRORD, CONNECTICUT, AssICNOR TO THR 1 TALRY a TOwNR MANUFACTURING COMPANY, vor lSAME PLACE.

LOCK. f

SPECIFICATION forming parl of Letters Patent No.'.381,293, dated April `17, 1888. .l

Application filed February 16, 1888. Serial No. 264,211. (No model.)

To all whom it may Concern: y Y

Beit known that I, WARREN H.' TAYLOR, of Stamford, in the county of Faireld and State vof Connecticut, have invented certain 5 new and useful Improvements in Locks,.of

1o escutcheon of a lock.

An `escutcheon for a tumbler-lock which has a rotary cylinder is usually fastened in placey by means of a setscrew passing through theA face of the loclgand forcing a slide into a notch in the peripheryof the' escutcheon, so

that `it cannot be unscrewed or withdrawn from the lock-case. In order to releasean escutcheon fastened inth'is way, it is only nec- Y essary tounscrew the setscrew. As it is' 2o lusually countersunk it is sometimes slightly unscrewed so as to release the escutcheon when a door is opened without the fact being noticed.

Then, Vafter the door is closed and locked a person 'can' u'nscrew the escutcheon itself and l thus get at the interior of the lock to unlock it. In this class of escutcheon-fastenings my invention consists in providing a connection between the escutcheon-fastening and the lockbolt, so arranged that whenever the set-screw 3c for securing the escutcheon is turned out it -will cause the connecting part to force back ythe lock-bolt into the unlocked positionif it be a vspring-bolt or latch, so that when the door is closed the latch or lock-bolt will not fasten it. `Apersonclosing a door and notie-A ing that the lock-boltorlatch does not operate will be warned that the lock has been tampered with by unscrewing lthe set-screw so as to permit the escutcheon to be removed. In the 4o case of a dead-lock boltI accomplish the same result in substantially the same way byem# ploying a spring-actuated connecting part between the escutcheon-fastening and the bolt, so that when the set-screw is turned back to allow the escutcheon to be removed, the said connecting part will be moved so as to stop the bolt from being] thrown forward into the locked position. A person then attempting to look his door will nd thelock inoperative, l 5o so that the fact that the lock has been tampered with will be made known.

It isobvious that the operation' and relative position ofthe parts will have to be .varied to adapt'my invention to dierent constructions of locks; but What'is illustrated will besufcient to show generally how my invention may be applied to ,the broad class of dead and spring bolts. A i' Y In the accompanying drawings, Figure 1 is a view of so much of the interior of. a lock asy is necessary to illustrate my invention. Fig. 2is a sectionron the li-nef2 2 ofFig. 1; and

a lockxas necessary to illustrate a'modiled form of my invention suitable fora deaddock. Fig.v 4 is a View` substantially like Fig. 3, except that the bolt is `sh'own in the retracted position, and the set-screw partly withdrawnv A so as to throw'the lever into position to obstruct 1 the bolt.l y

A indicatesfthe lockfcase; B, the lock-bolt;

C, the escutcheon; D, the hub or rotary cyl.

inder within the escutcheon; E, the cam for throwing the lock-bolt; ,and F, a set-screw for forcing 'the slide G'into the notch H of the `Fig; 3 is a view of so much. of the interior of escutcheon `to hold it in place.v All these;

parts are of ordinary construction.

Referring to the parts constituting my improvement, I indicates a lever pivoted at K,

its long arm resting against a part or stud, L, of the lock-bolt, as shown in Fig. ,1, and its short arm resting against one end of the slide G2 l In the drawings, Fig. 1 represents the setscrew and slide inplace tofhold the escutcheon and prevent its turning. Itis' obvious 'that should the setscrew be turned and withdrawn slightly it would'force the slide G back, and

as itk bears against the shortr arm of the lever Y -tampered with while the door was open.'

In Figs. 3 andy 4 I show my invention ap# plied to a deadlock, the form ofthe lever beA ingdifferent.

and O is its short arm. The long armais in this instance provided with a latch, P, adapted to enter a notch, Q,'in the lock-bolt. The

In this figure, Mindicatesfthe long'arm of the lever, which ispivoted "atv N,

spring R keeps the short arm of the lever constantly in contact with the projection S upon the set-screw fastening, and keeps the long arm ofthe lever ordinarily out of engagement with the bolt. Should the set-screw be turned out slightly when the door is open, the long arm of the lever would be moved in the path of or in engagement with the bolt and operate as a stop to prevent the bolt from being thrown forward into the locked position. My invention,therefore, operates to thwart the schemes of thieves and burglais, who sometimes a-ttack this class of locks when doors are open by turning out and slightly withdrawing the setscrew F, and then returning at a convenient time and screwing out the escutcheon and unlocking the door.

In a lock, the combination of a fastening for the escutcheon, and a lever connecting said fastening and the lock-bolt,whereby when the fastening is Vmoved to release the escutcheon the lever holds the bolt in inoperative position, substantially as set forth.

l In testimony whereof I have hereunto sub- 25

Images