US755897A - Electric lock. - Google Patents

Description

PATBNTED MAR. 29, 1904.

F. LOMBARDI. ELECTRIC LOOK.

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UNITED STATES Patented March 29, 1904.

FRANK LOMBARDI, OF BROOKLYN, YORK.

ELECTRIC LOCK.

SPECIFICATION' formingpart of Letters Patent No. 755,897, dated March 29, 1904. I Application filed December 19, 1903. Serial No. 185,7 75. (No model.)

To all whom it may concern:

Be it known that I, FRANK LOMBARDI, a citizen of the United States, and a resident of Brooklyn, in the County of Kings and State of New York, have invented certain new and useful Improvements in Electrically-Controlled Locks, of which the following is a specification.

My invention relates especially to locks used upon doors or the equivalent of any description, and has for its object the provision of a lock wherein the bolt may be held against movement by the lock-key or released so that it may be moved by the key, such holding or releasing being accomplished by electromagnets the circuits whereof are controlled by hand or by an automatic time-switch.

y To attain the desired end, my invention consists, essentially, in the combination, with the bolt of a lock, of electrical means for controlling the movements of said bolt, all of which will be hereinafter first fully described and then pointed out in the claims.

In the accompanying drawing, forming a part hereof, is shown a side elevation of a lock embodying my invention, the side of the lockframe being removed.

1 is the lock frame or case. 2 is the keyhole therein.

3 is the lock-bolt provided with a projection 4.

5 is an iron catch, which also constitutes a magnet-armature, pivoted above the bolt at 6 and having a notch at 7 arranged to engage with the projection 4 upon the lock-bolt and a finger 8 at its free extremity. The catchpiece 5 is provided with a strip of conducting material 9, from which a finger 12 extends to an insulated conducting-plate 10, having a piece of insulating material 11 xed therein.

14 is4 an electromagnet having an armature 15 mounted upon a conducting-strip 16, fixed to an insulating-post 17, and having connection with a conducting-strip 18 the free end whereof is turned upward and arranged to contact with the strip 9.

19 is a stop limiting the upward movement of the armature 5.

20 is a binding-post fixed in the lock-frame 1. 21 is an insulated binding-post Xed in said frame and having a conductor 22 leading therefrom to an electromagnet 23.

13 is a conductor which leads from the plate 10 to the magnet 23.

24 is a second insulated binding-post fixed p to the post 24. This switch is designed for controlling the 'lock by hand; but where it is desired to automatically control the lock and release or retain the bolt thereof at a predetermined time clock mechanism may be employed in connection with the lock-circuits.

When constructed and arranged in accordance with the foregoing description, the operation of my invention is as follows: The bolt being in the position shown in full lines may be thrown by a key so as to take the position shown by the dotted lines, and as the catchpiece 5 rests upon the bolt projection 4 the notch 7 will engage with such projection, preventing the possible throwing back ofthe bolt by the lock-key. If now it is desired to raise the catch out of engagement with the projection upon the bolt, the switch 27 is operated to send the electric current through the magnet 23, attracting'the armature 5, thus raising the catch from such engagement, the finger 8 at the free end of the lcatch falling into the notch at the top of the armature 15, retaining said catch from again dropping, thus permitting the free movement of the lock-bolt by the lock-key. This act of raising the catch cuts 'out the magnet 23, and if it is desired to release the catch the circuit through the magnet 14 is closed, attracting the armature 15, dropping the catch-piece back upon the projection 4 ready to engage therewith. This movement cuts out the magnet 14, establishing contact for the first-described magnetcircuit.

` Having-now fully described my invention, whatI claim as new therein, and desire to se cure by Letters Patent, is*

the bolt, a spring-actuated part arranged to engage the catch for holding it out of engage- I 5 ment with the bolt, and independent electrical means for moving the said sringactuated part to release the said catch,- substantially as set forth.

Signed at Ne7 York, in the county of New 2O York and State of New York, this 17 th day of November, A D. 1903. FRANK LOMBARDI.

Witnesses:

LAWRENCE CARRIN, CHRISTIAN GROTH.'

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