US971423A - Lock. - Google Patents

Description

F. WALTERS.

LOOK.

APPLICATION FILED MAY 6, 1910.

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ICF.

FRANK WALTERS, OF SPOKANE, WASHINGTON.

LOCK.

To all whom it may concern:

Be it known that I, FRANK "WALTERS, a citizen of the United States, and a resident of Spokane, in the county of Spokane and State of Vashington, have made certain new and useful Improvements in Locks, of which the following is a specification.

My invention relates to in'iproven'ients in electrically controlled locks, and it consists in the combinations, constructions and arrangements herein described and claimed.

An object of my invention is to provide a lock which may be operated by electrical means and which, in its normal position, is dea dlocked.

A furt-her object of my invention is to provide a lock of simple construction which may be put into or out of its deadlocked condition from a distance.

Other objects and advantages will appear in the following specification and the novel features of the device will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings, in which,

Figure l is avertical section through the device, Fig. 2 is a section along` the line 2-2 of Fig. l, and Fig. 3 is a diagram of the circuits of the magnets.

In carrying out. my invention I provide a main casing consisting preferably of metal. This casing I have shown at A in the drawing. Vhile the casing is preferably made of brass, it may be made of other suitable material if the electrical connections are suitably insulated.

Within the casing is located the main operating magnets B. The armature C for these magnets is mounted on a shaft or spindle D which in turn is pivotally mounted at cl in the walls of the casing. One end of this armature is connected by means of a spring- E with a lug c extending inwardly from the wall of the casing. The other end of the armature is pivotally connected by means of the link F with the latch arm G. The latch arm extends through an opening g in the front wall of the casing, and is provided with a head I-I having a cam surface li. The opposite end of the latch arm is provided with a shoulder h2. The latch arm Gr is carried by a shaft K which is pivotally mounted in the walls of the casing A.

The means for deadlocking the latch arm G consists of the magnets M whose armature O is pivotally mounted at l). This arma- Specification of Letters Patent.

Application led May 6, 1910.

Patented Sept. 27, 1910.

Serial No. 559,748.

ture is normally held away from the magnet poles by means of the compression spring S. The weight WV on the end of the armature serves as a steadying member to render the action of the armature more certain.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood.

The lock is designed primarily for use on elevator doors.

In Fig. l the latch head H. is shown as engaging the hook V which is attached to the door frame. lVhile I have shown a hook it will be understood that any suitable member against which the head H may abut might be used instead of the hook. As shown in the figure, it will be seen that any attempt to move the door containing the lock away from the hook will be ineffective. Now when the push button Z (see Fig. 3) is manipulated the magnets B and M, which are parallel will be energized. The attraction of the armature O by the magnet M will withdraw the head o which engages the shoulder 7b2 of the latch arm, and the attraction of the armature C by the magnets B will cause the movement of the latch arm into the position shown in dotted lines in the figure, and will raise the end of the head I-I so as to clear the retaining flange o of the hook V and will thereby permit the door to open. lVhen the circuit is broken the spring E will cause the latch arm to resume its normal position and if the armature O has retracted before such operation of the spring the end h2 will cam the head o out of the way so as to allow the shoulder to be engaged by the upper part of the head, thus deadlocking the device.

The lock, as stated, is designed to be used preferably on elevator doors, the push button being located on the elevator and the lock being under the control at all times of the elevator operator. Thus it prevents many aceidents which might be caused by drunken men, boys, and others who open the door while the elevator is still in motion.

I claim l. An electrically controlled lock comprising a casing, a pivoted latch arm carried thereby, a pivoted armature connected with said lat-ch arm, magnets for moving said armature, a second armature provided with a head arranged to engage the end of said latch arm for deadlocking the same, and magnets for moving the second named armature, thereby permitting a movement of the latch arm when the first named armature is actuated by its magnets.

2. An electrically controlled lock comprising a casing, a pivoted latch arm carried thereby, a pivoted armature, a link connecting one end of Said pvoted armature LWith said latch arm7 a spring connecting the other end of said pivoted armature with said casing, a second pivoted armature provided with a head arranged to engage the end of the latch arm for deadlocling the same7 a spring for normally keeping said Second named armature in engagement with said latch arm, and magnets for moving said sec- 15 ond named armature away from said latch arm, said second named magnets and said first named magnets being on one electrical circuit.

FRANK WALTERS.

Witnesses:

SAMUEL HANAUER, PRISCILLA L. MCCOLL.

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