US1193653A

US1193653A - Setts

Info

Publication number: US1193653A
Authority: US
Publication date: 1916-08-08
Anticipated expiration: 1933-08-08

Description

J. WINN & A. FEINBERG.

SAFETY LOCK.

-APPLICATION FLED SEPT.3. 1914- 1,193,653. V V Patented Aug. 8, 1916.

/C D B I i E I J i i TTE %TAE PATEN FFGEO JOHN WINN, OF BROOKLINE, AND AARON FEINBERG, OF DORCHESTEE, MASSACHU- SETTS. i

V SAFETY-LOCK.

Specication of Letters Patent.

Patented Aug., &1916.

Application filed September 3, 1914. Serial No. 859942.

To all 'whom it may concem u Be it known that we, JOHN WINN, a citi zen of the United States, and a 'resident of Brookline, county of Norfolk, Commonwealth of Massachusetts, and AARON FEIN- BERG, a citizen of the United States, and a resident of Dorchester, County of Sufi'olk, Commonwealth of Massachusetts, have invented certain new and useful Improvements in Safety-Looks, of which the folloWing is a specification accompanied by drawings.

This invention relates to safety locks, but more particularly to a safety guard or shutter adapted to be applied to the lock strike and designed to prevent the insertion of a flexible piece or tool between the door and door jamb for the purpose of forcng the bolt backwardly.

In a spring latch lock, of ordinary construction, there is usually more or less space or clearance between the door and door jamb, and a flexible tool may be inserted without much difliculty into this space from the outside, and manipulated to force back the bolt to open the door. The tool may be inserted between the edge of the door and the jamb or else a hole may be cut through the corner of the door to make a more direct entrance for the tool.

Our guard or Shutter is so constructed that it will effectually prevent the forcing of the lock by any of these methods, and our device is operated automatically by the closing and opening of the door.

Further objects of the invention will hereinafter appear and the invention is shown in the accompanying drawings, in which- F igure 1 is a horizontal sectional View of devices embodying the invention; Fig. 2 is a similar view partly broken away of the guard or shutter in normal position. Fig. 3 is a front view of Fig. 2; and Figs. 4 and 5 are horizontal sectional views, partly broken away of modifications.

Referring to the drawings, A represents a portion of a door, having the lock casing B therein, C is the door jamb, and D is the strike. The bolt E has the usual beveled head F and slides in the lock casing.

In Fi 's. 1, 2 and 3 We have shown one form of guard movably mounted at the opening of the strike D. The beveled end F of the bolt forces one portion of the guard inwardly, as

the guard is swung outwardly as shown in Fg. 1, into the space between the door and door j amb.

The guard may be constructed in various ways, and one form of Construction shown in Fgs. 1, 2 and 3 comprises two members G and H, pivoted on a common pivot J in any suitable manner, as by means of the lugs K and L on the respective members.

In order to cause the guard to return to normal position when the bolt is withdrawn, T provide a retracting spring O of any suitable construction, shown as a coiled spring coiled about the pivot J and having one end a bearing on the member G and the other and longer end b abutting against the edge of the opening in the strike.

Another spring P is coiled about the pivot J and has one end c bearing on the member G and the other end d hearing against the member H, so that as the member G is pressed inwardly by the bolt, the member H is forced outwardly through the intermediary of the spring P, and this spring connecton ermits relative movement between the mem ers G and H. The member G may be rocked about its pivot to a greater angular extent than the member H', as indicated in Fig. 1, and the member H will always be tightly pressed against the door. If desired,

a recess Q may be formed in the door or in a portion of the lock casing as shown, for the reception of the end of the member H, and thus further and absolutely prevent the insertion of a tool by force to press backthe bolt.

forded by the spring member S, and an additional retracting spring 0 only is provided, having one end a hearing against the spring member S and the other end b having an abutment against the edge of the strike as shown.

In Fi 5 a fiexible guard or Shutter is provide in one piece, comprising a spring U Secured to the lugs V and pivoted on the pivot J. The retracting spring O is also provided for this spring guard.

ally block the insertion of a tool in this way,- as well as directly through the space 'between the door and the door amb.

Our device is so constructed that it may be applied to almost any existing lock of the type specified herein, and the provision of flexibility in the device enables it to be used with bolts of difl'erent sizes, or which travel longitudinally different distances.

We claim anddesire to obtain by Letters Patent the following:

1. In a spring-latch lock, the combination with the lock casing, bolt having a beveled end, and strike, of a guard pivoted at the opening of the strike, one portion of the said guard being adapted tobe pushed inwardly by the bolt, so that the remaining portion of the guard is swung outwardly to form an obstruction in the space between the door and door jamb and a retracting spring for returning` the guard to normal position when the bolt is withdrawn, the said portion "of the guard which is adapted to be pushed inwardly by the bolt being eapable of greater angular movement about the pivot than the remaining portion of the guard.

2. In a spring-latch lock, the combination with the lock casing, bolt having a beveled end, and strike, a two piece guard, a common pivot located at the opening. of the strike, the members of saidguard being pivoted on said pivot, independent .springs for each of the members of said guard, so that one member of the guard may rock about the pivot to a greater extent than the other,

the bolt being adapted to push one member of the guard inwardly and thereby carry one member of the guard inwardly and' thereby carry the other member outwardly into the space between the door and door janb, the lock casing having a recess to receive the end of the other member of the guard which is swung outwardly into the said space between the door and door jamb.

In testimony whereof we have signed this specification in the presence of two subscribing witnesses.

JOHN WINN. r AARON FEINBERG. Witnesses:

E. J. PALMER, ERNEST W. THOMPSON.