US222751A - Improvement in locks for handcuffs - Google Patents

Description

J. `LTOWER, & H; W. KAHLKB.

Look for Handcuffs.

No. 2225751. Patented Dec. 16, 1879.`

"raras Arnim JOHN J. TOWER AND HENRY W. KAHLKE, OF BROOKLYN, NEW YORK,

ASSGNORS TO SAID JOHN J.'TOWER.

IMPROVEMENT IN LOCKS FOR HANDCUFFS.

Spccilication forming part of Letters Patent No. 222.751', dated December 16, 1879; application filed August 19, 1879.

To all whom 'it may concern:

Be it known that we, JOHN J. TOWER and` HENRY W. KAHLKE, of Brooklyn, in the State of New York, have invented an Improvement in Locks for Handcus, te., of which the t'ollowing is a specification.

In Letters Patent No. 200,950, granted to us, the lock ot' the handcuff is made with a sliding bar, upon which are pivoted two on more swinging catches.

Our present invention is for the purpose of locking the spring-catch so that it cannot be forced back by an instrument introduced be,- tween the notched segment and the radius-bar; for allowing the handeuft' to be slipped upon the person and instantly closed Without the use of a key; for all/owing the handcuif to be opened by the key, and preventing the withdrawal of the key until the parts have been moved so as to be in a position for instant use again.

- 1n the drawings, Figure l is an elevation of the handcuff and lock, the -plate of the lock being removed. Fig. 2 is a section at the line a: .cof Fig. l. Fig. 3 shows part of the radiusbar in section, and elevation of the lock, the tumblers being removed. Fig. 4 represents the bolt-detainingtumbler detached, and Fig. 5 shows the bolt detached. Fig. Gis a view similar to Fig. 3, but rthe guard-tumbler is not shown.

The radius-bar ct is jointed at b to the'end of the notched segment-bar c, and the link d is applied at the joint, as usual. The segmentbar c passes through the outer end of the radius-bar, and the notches in the segmentbar care 0n the inner surface. Within the radius bar there is a cavity for the parts of the lock, and the cap-plate f is secured by rivet-s in the ordinary manner. The springcatch h swings upon the stud t, and it is moved toward the segment-bar by the spring le. l is a sliding bolt, having a block, o, that can be moved in between the ends of the swinging catch h and the inner partot' the lock-case when the catch h is in one of the notches ot1 the segmental bar. Hence the sprin g-catch cannot be forced back or drawn back until that block is removed from the said position shown in Fig. l.

The bolt Z has two talons on it, so that the key u turned upon the stud 1 may act in the talon 2 and draw the bolt l and stud o to the position shown in Fig. 6. The spring-catch l1. is now free to lnove either way. This is the normal position of the lock, and the position it assumes when the key has been once turned around and then removed from the lock. |lhe haudcutt can now be closed around the wrists, and the spring-catch will yield as the segmentbar is forced through the radius-bar, and the said catch will prevent the lock being opened until some deviceis applied to draw the springcatch back out of the notch ot' the segmental bar c. This is accomplished by giving the key a partial second turn, which causes it to actin the talon 3 of the bolt and draw the same along, and, by the block o acting on the tail 4 of the spring-catch, draw the same and the springl catch back out ot' the way of the segmental bar.

It is now t0 be understood that any desired character ot' springs or tumblers may be employed to prevent end motion being given to the bolt except by the key.

We have shown two tumblers, s s,witl1 springs and notches and a stud or fence, 6, upon the bolt, to hold the said bolt when inthe projected position, or when in the partially-retracted position that the parts assume when the handcufC is ready for use. When the key is applied to draw t-he bolt back and open the handcuff the spring of the catch would immediately throw the bolt forward it' the key turned all, around, and hence clear the bolt. To prevent this the talon 4 may be made so as to stop the revolution of the key at the desired place 5' but we prefer and use a guard-tumbler, t, made as seen in Fig. 4,. The incline S on this tumbler allows the said tumblerto swing until its heel 9 passes into the path of the key and arrests its further movement. The key is now blocked, and the parts of the lock do not act upon the segmentbar 5 but when the key is again turned forward the parts assume their normal position, the guard-tumbler is raised out of the way of the key by the stud ofthe bolt running under the incline 8, the key can be removed, and the handcuffs are ready for use. After they have been placed upon the prisoner so as to secure A him the key is applied to move the bolt and secure the parts against any attempt to open 2. The combination, with the notched seg- A ment-bar, of the spring-catch, the bolt l, block o, and guard-tumbler t, to prevent the Withdrawal of the key, substantially as set forth.

3. The combination of the notched segmental bar, the swinging radiusbar,. the swinging spring-catch 71., the bolt Z and its block o. the

guard-tumbler t, having the incline 8 and heel- 9, and the tumblers s s, and fence or stud 6, substantially as set forth.

4. The combination7 with the notched seg ment-bar c and the radius-bar a, of a bolt moved by a key and acting to prevent the movement of' the radius-bar in either direction relat'bvely to the segmental bar7 substantially as set forth.

Signed by us this 16th day of August, A.

JOHN J. TOWER. HENRY W. KAHLKE.

Vitnesses GEO. T. PINCKNEY, WILLIAM G. Mo'rr.

Images