US711889A

US711889A - Key.

Info

Publication number: US711889A
Authority: US
Inventors: Abraham Henry Wormald
Original assignee: WORMALD PATENT LOCKS Co Ltd
Current assignee: WORMALD PATENT LOCKS COMPANY Ltd; WORMALD PATENT LOCKS Co Ltd
Priority date: 1902-06-20
Filing date: 1902-06-20
Publication date: 1902-10-21
Anticipated expiration: 1919-10-21

Description

Patented D'ct, 2|, |902.

A. H. wonmALn.

I( E Y (Application led June 20, 1902.)

(lo Model.)

F'l-C./.

lnvENoR 'j UNITED STATES PATENT EEICE.

ABRAHAM HENRY VORMALD, OF SI-IEFFIELD, ENGLAND, ASSIGNOR TO THE WORMALD PATENT LOCKS COMPANY, LIMITED, OF SI-IEFFIELD,

ENGLAND.

KEY.

SPECIFICATION' forming; part of Letters '.Patent No. '71 1,889, dated October 21, 1902.

Application filed `lune Z0, 1902. Serial No. 112,490. lNo model.)

To all whom, it 7am/y oon/cern:

Be it known that LABRAHAM HENRY WOR- MALD, out of business, a subject of the King of Great Britain and Ireland, residing at Cemetery road, Sheffield, in the county'of York, England, have invented certain new and useful Improvements in Keys, (for which I have made-an application in Great Britain, No.`

18,630, dated September 18, 1901,) of which the following is a specification.

This invention relates to locks and keys, and has for its object to preventl picking of such locks.

Thevinvention consists in the features and combinations and arrangement of parts hereinafter described, and pointed out particularly in the claims.

In the accompanying drawings I have illustrated the improved key and a lock capable of being operated by such a key.

Figure 1 is a side elevation of the improved key. Fig. 2 isasection thereof. Fig. Sis an end View of Fig. l. Fig. 4 is an end view ot' Fig. 2. Fig. 5 is a face view of the lock, and Fig. 6 is a face view showing the locking parts with the front plate and shackle removed.

My improved key (shown in Figs. 1 to 4) consists of a housing a, Within which can be slid a sleeve b against the action of the coiled spring b. The sleeve l) is formed with a xed Wing c, another wing d being pivoted to a spindle e, fixed to the housing a. Normally the key is provided with one projecting Wing c only, the hinged wing being recessed within the sleeve l), as shown in Figs. 1l and 3. When the key is pushed home and end pressure is applied to the housing a, the sleeve b is slid Within the housing and the wing dis protruded out ofthe sleeve h, as explained in my former patent and as shown in Figs. 2 and 4 of the present application-that is,the wing passes out through a slot dx in the shell of the sleeve b, the said wing having a curved edge at d.

The lock used with such a key is indicated in face view in Fig. 6, and consists of a bolt g, slidable on a stud g against the pressure of a spring 7L. A locking-lever ,maintained in position by a'spring 7s, engages with the bolt g, preventing the same from being operated until the part t has been withdrawn from the notch j, formed on the bolt g. The key is inserted in the lock, and end pressure is applied to protrude the Wing d out of the sleeve l). The key is then rotated, the fixed wing c coming irst into contact with the locking-lever t', withdrawing the part t' from the notch j, the Wing d then sliding back the bolt g. When the key is withdrawn, the springs 7L 7c return the sliding bolt g and locking-lever 't' into their normalpositions.

As the key normally is provided with only one projecting wing c, only one slotfis necessary in the front plate of the lock. It is evident, therefore, that as two Wings or operating-Wards must beused to actuate the lock the lock cannot be picked.

The essential feature of myinvention consists in the combination, with a key of any ordinary or suitable constructiomof a recessed wing,which beinghoused within ashank of the key requires no slot-for its passage in the front plate of the lock,l but which can be brought into action Within the lock to provide an additional wing or projection to operate the lock. Whatever, therefore, the number of Wards or projecting Wings are required to actuate the lock, the key-plate can be formed with one slot less than such a number, thus rendering it impossible to insert a pick-lock capable of operating the lock.

I declare that what I claim is l. In combination in a key a housing a, a sleeve b, a fixed projecting wing csecured to the sleeve, a spindle e, a Wing d pivoted'to the spindle, and means for protruding the pivoted wing CZ out of the sleeve b substantially as described.

2. In combination in a key, a housing ct, a sleeve h slidable therein and carrying a rigid bit or wing said sleeve having a'closed end and lateral opening, a spindle e Within the sleeve and housing, a coiled spring encircling the rod within the housing and bearing against the end of the sleeve and a pivoted bit having a rounded edge adapted to bear against said closed end and be projected through said lateral opening.

In witness whereof I have hereunto set my hand in presence of two Witnesses.

ABRAHAM I-IENRY WORMALD. Witnesses:

JOSHUA ENTWISLE, ALFRED Yarns.