SU2242A1 - Electrical anti-theft alarm - Google Patents

Description

The present invention, which is a combination of an electric lock with a signal device, is intended to protect against theft by an alarm that is activated when the door is opened or when the signal circuit is broken.

FIG. 1 shows a longitudinal section of the lock; FIG. 2 is a top view thereof, in FIG. 3 is a front view of it without a front bottom of the case of the lock; FIG. 4-core, in FIG. 5, 6 and 7 types of the circuit breaker in front, side and top and in FIG. 8 is a circuit for switching on signaling device devices with the following designations: / - brass plate, on which all parts of the lock are mounted, 2 - electromagnetic coil, mounted on a brass plate, 3 - movable iron core, which is the latch of the lock, 4 - spring, becoming a core with a latch on the constipation, 5 - brass, a guide box in which the latch moves.

6 - lock case, 10 - automatic switch, // - basic slab of marble slate or other suitable material on which all parts of the automatic switch are mounted, 12 is an electromagnetic coil of high resistance, 13 is an iron core serving as an automatic contact the switch, 14 - copper cup d.h mercury contact, 15-movable wire to the iron core - the contact, 16-clips of the signal chain, 17 - clips of the locking chain.

The lock is installed from the inside of the door and connected to the rest of the alarm devices, as shown in FIG. 8. Signaling devices (circuit breaker, bell and two switches) are installed in a room in which people are constantly present, who can take action against intruders with the resulting signal. When all appliances are turned on, the installation is as follows.

in the way: under the pushing action of the spring 4, the lock locks the door when it closes (like American locks); at the same time, door contact 18 is closed, and the core of the automatic switch 13 is pulled into the coil, the opening of the bell circuit; the current passing through the / f circuit breaker is so weak that the electromagnet with winding 2 cannot open the lock; in this position, the lock and alarm are until the door is opened or the wire 19 is broken; in such a case, the core 13 of the automatic switch will be lowered into the cup 14 with mercury, the ring will close and the call 20 will start ringing. In order to open the electric lock, the button 21 is used, which serves to turn on the winding circuit of the electromagnet 2, in addition to the automatic switch, in order to lock the latch 3 of the lock. A switch 22 serves to turn off the ringing circuit.

SUBJECT OF THE PATENT.

1. The electric signaling device for theft prevention, characterized by the use of a lock consisting of an electromagnet with a winding 2 and a core 5, which is a lock junction and under the pushing action of a spring 4, which is connected in series with a circuit breaker 10, consisting from coil 72 with core 13 movable therein, which forms part of the signal circuit that is closed when current is stopped in coil 12 and associated with this fall of core 13 into cup 14 with mercury.

2. In the device described in paragraph 1, use the button 21, which serves to turn on the winding circuit of the electromagnet 2, in addition to the automatic switch, in order to unlock the latch 5 of the lock.

Tipo-pitograph “Red Printed, Leningrad, International, 75.

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FIG. 6