US525400A - Electric lock - Google Patents

Description

UNITED STATES PATENT OFFICE. E

FREDERICK APITZ, OF LOCKPORT, ILLINOIS.

ELECTRIC LOCK.

SPECIFICATION forming part of Letters Patent No. 525,400, dated September 4, 1894.

vApplication filed May 3l, 1894- To all whom it may-concern.-

Be it known that I, FREDERICK APITz, a citizen of the United States of America, residing at Lockport, in the county of Will and State of Illinois, have invented certain new and useful Improvements in Electric Attachments for Door-Locks, of which the following is a specication, reference being had therein to the accompanying drawings and the letters of reference thereon, forming a part of this specification, in which- Y Figure l is'a side view of an ordinary door, showing the lock and electric wires in broken lines, and the plate to which the circuit breakers are attached in full lines. Fig. 2. is a perspective viewof an ordinary door lock having a portion of one of its sides broken away exposing to view the bolt, tumbler armature and electro magnet. Fig. 3 is a cross section of a portion of a door and its janlb, showing the manner in which the electric wires may come in contact when the door is closed. Fig. 4 is a face view of the door plate for carrying the circuit breakers, and a side elevation of the battery, and the electric wires connected thereto.v Fig.` 5 represents a portion of the door plate showing the vedge of one of its switch boards or circuit breakers, and

knob for turning the switch. Fig. 6 is a' back view of the door plate showing its switches or circuit breakers and wires connected thereto and Fig. 7 represents a portion of the door plate showing the edge 'of one of its switch boards or circuit breakers and knob for turning the switch.

This invention relates. to certain improvements in electric attachments for door locks by means of which the lock bolt is prevented from being moved backward by the key until released by means ofl the electric apparatus, which improvements are fully set forth and explained in the following specification and claims.

The object of this invention is to apply to an ordinary door lock an electro magnet arranged in such manner that its armature may engage the lock bolt when the electric current is broken, and to release the said bolt when the electric current is established, which current is broken or established by means of a switch or a series of switches located at any convenient placein the wire Serial No. 512,990. (No modcl.)

line, said switch being connected to the shank of a knob having an index point moving over a dial, so that the operator must have knowledge of the means of setting said index to the proper point on the dial or dials so as to turn the switches to form a current by making the wire continuous.-

Referring to the drawings A represents an ordinary mortise lock having a lock boltvB providedV with a notch n in its under side for receiving the lug E on the upper side of the oscillating armature C of the electro magnet o; which may be located in or adjacent to the lock, but is shown in this devi'ce as being attached. to the soft iron arm F attached at O to the lock ease,l and having the line wire S,

S4 wound on it to form the coil G. The armature is pivoted near its center on the pin H, and is weighted at its outer end so as to bring its opposite end in contact with thelock'bolt when the electric current is broken.

N is a plate that may be secured to the side of the door T as shown in Fig. 1. or at any` other desirable place. This plate is provided with a series of knobs K having their Shanks :nf journaled in suitable boxes in said plate, which Shanks have secured on their inner ends yarms L, having wound on their outer ends a coilof wire o, but insulated from arms L by means of some insulating material W placed between said arm and coil asshown in Fig. 5. l n

M are a series of radially arranged ybrass arm plates surrounding each knob shank x and secured to the back ofy plate N by being screwed or tacked thereto, and over the ends of which the' coil o moves and in contact therewith. The lends of the wires are connected with said radially arranged plates M by means of having their ends passed under said plates, and held in contact therewith by means ofsaid plates being screwed or nailed to plate N.

It is intended to have the wires connected totwo adjacent plates M as shown i in Fig. 6 so that when coil/nis moved so as to be in contact with said two adjacent it will close the electric circuit.

J is an ordinary battery for generating the plates M electric current which may be located at any convenient place near the door. nS isa line wire connecting said batterywith the coil G of the magnet. S is a line/wire connecting wire S3.

said battery with one of the radial plates at the shank of knob P as shown in Fig. 6.

Szis a wire for connecting one of the radial plates M ot knob P adjacent to the one connected with wire S5, with one of said radial plates of knob P.

Wire S3 is a wire for connecting one of the radial plates M of knob P', adjacent to the one connected with wire S2, with one of said radial plates of knob P2, and wire S4 connects coil G of the magnet with a radial plate of knob P2 adjacent to the one connected with When the arms Lof the Shanks of the knobs P. P. P2 are turned as shown in Fig. G so as to cause their coils o to be severally in contact with the two radial plates of each series that are connected with the 'wires as aforesaid the circuit is closed and armature Gwill be attracted by the magnet and withdrawn from contact with the bolt B so it may be moved by a key. To break the circuit all that is necessary is to turn one ot' said knobs to a different position from that shown in Fig. 6, so that the coils o of the arm L of the knob turned will not connect the two Wires, when the magnet will cease to attract the armature, and it will then engage thelock bolt as shown in Fig. 2. so it cannot be moved by a key. The face of the plate N has dials with each knob, but instead othaving numbers on the dials similar to a clock, pins or studs R are used in their place corre` sponding'in number with the numbers on a clock dial, and the knobs have laterally projecting studs K for being turned to point to any particular stud R. Fig. 3 shows how the wires may be arranged to permit the door to be opened and closed. The wires may enter the door through holes leading to the electro magnet, the portion in the door being in oontact with the remaining portion only When the door is closed. The wires S are intended to connect the battery J with two adjacent radial plates M. of the knob P3, one of which` wires is intended to have an ordinary call bell located somewhere Within its length and located in some room in the house and used as an alarm, and not connected with the lock bolt or magnet.

, In operation, supposing the door to be closed and locked and the armature in the position shown in Fig. 2.50 the lock bolt cannot be moved backward by a key, caused by the electric circuit being broken. The person desiring to enter and unlock the door must turn the several knobs P, P', P2 until an electric current is established` as hereinbefore set forth. By having the knowledge of what studR it is necessary to have-stud K on the knob point at, he can easily turn all three of the knobs to the proper position to cause the circuit to be closed as before stated, when the armature will release the bolt B so a key will move it. As the wires may be changed so as to connect with any others of the radial plates M. than those shown, the combination can be thus changed quickly so as to cause it to be necessary to leave stud K stand opposite a dierent stud R. VAs the studs or pinsR are not numbered, it is intended that the operator will understand that each one represents the number corresponding to that position on a clock dial, so it is unnecessary to number these studs R. When locking the door to go away the said knobs are intended to be turned inV order to break the circuit in order to cause thearmature to engage the lock bolt as stated. Should a stranger undertake to turn the knobs to establish the circuit without previousV knowledge of where to turn them, or how to turn them, he would no doubt not be able to turn them to their proper position, and would likely also turn the alarm knob P3 and alarm the inmates of the house. Ot course any number of circuit breakers like those shown may be used, the` more used making it more diicult for a stranger to use the device.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is as follows:

l. rlhe combination of the lock bolt B.hav ing notch W, armature O pivoted` on stud l'l and having its outer endweighted, electro magnet m, F having the coil G, battery J, wire S for connecting said coil and battery, knobs P,\P, P2, each having index studs K and shanks arms L connected to said shanks at the end opposite the knob, and insulated coils'v on the outer ends of said arms, radial plates M,.plate N having studsR, wires S3, S4, S5 for connecting coil Gr with battery J through the'medium of said radial plates, all arranged to operate substantially as and for the purpose set forth.

2. In an electric attachment for door locks a circuit breaker comprising the combination ot'` the plate N having the dial pins or studs R, knob having the index` stud K and.` shank so', arm L secured on said shank and having the insulated coil/U on its outer end radial plates M, and the wires for connecting said radial plates with an electro magnet and a battery all arranged to operate substantially as andl for the purpose set forth.

FREDERICK APITZ.

Witnesses:

THos. H. HUTCHINS, HERBERT COWELL.

IOI

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