DE359821C - Security circuit against burglary - Google Patents

Description

GERMAN EMPIRE

ISSUED
ON SEPTEMBER 26, 1922

REICH PATENT OFFICE

PATENT LETTERING

'- JVl 359821 - CLASS 74 a GROUP 21

So VIIIJ74a)

Curt Wenzel and Emil Fiedler in Beilin-Schöiiefeerci. Security switching against intrusion.

Patented in the German Empire on April 9, 1921.

The invention relates to a security circuit against break-in, in which to close the alarm circuit one-automatic Switch is provided, the tripping electromagnet in a second that can be closed by door or window contacts Circuits is arranged; According to the invention, this second circuit is located also an automatic switch, its release electromagnet by means of a third

B5982i

Circuit by operating a push button or the like. In a known manner can be excited. The usual bell line J can expediently be used as the third circuit j to be used.

The object of the invention has the advantage that as a result of the triggering of the two | With the automatic switch from the outside, you first leave the apartment or building can without the door contact closing the alarm circuit. Only by closing the second switch through a contact attached to the outside of the apartment or building, the Alarm device ready for operation. Now becomes a door or window contact closed by unauthorized opening of the door or window, the first switch is triggered, so that it the alarm circuit closes, which means that the alarm signal continues to sound uninterrupted, regardless of whether the door is closed again immediately or not.

The object of the invention is illustrated, for example, on the accompanying drawing.

Bells c and lamps d are switched on between the power lines α and b. The line b is interrupted at two points, but where it can be closed by a manual switch I and an automatic switch ej. The automatic switch e has a locking lever which can be lifted off by means of a magnet.

The magnet / is connected to a circuit g ″, h , which can also be opened and closed by the manual switch I. The battery i is used to generate the current. The lines g and h are routed to two rails t and u , respectively , of which lines v, w lead to the door and window contacts k . The line h is interrupted at a point where it can be closed by the automatic switch m . The switch m has a locking lever that holds it in the open position. The locking lever is under the influence of a magnet n, which is connected to a third circuit 0, p . As a third circuit, you can use the bell line, in which the battery j and the j hall bell r is located. Push buttons q are outside the apartment or of the room, for example, at the front door and at the back door. The lines v, w can be routed through a panel so that in the event of an alarm one can immediately see which Door or which window the thief opened.

The device works as follows:

If the apartment or building is under supervision, switch I is open. If you want to leave the apartment and secure it with the alarm device, you first ensure that the switches and m are open. Then you close switch I. Now you also close all doors and windows. After leaving the apartment you press. on one of the push buttons q. This triggers the automatic switch m , so that the line h is closed at the point of interruption. When a door or window contact k is closed, a current must flow through the lines g, h . By pressing one of the buttons q , the auxiliary line g, h is put into operational readiness.

If an unauthorized person now opens the door or a window, the relevant contact k is closed, the magnet / is excited and the switch e is triggered. The power circuit is closed and the alarm bells c sound while the lamps ei light up.

If you want to put the alarm device into operational readiness despite the presence of people inside the apartment, you only need to turn on the switch m by hand or by pressing a push button arranged in the apartment.

Claims (1)

-Claim: Security circuit against burglary with an automatic switch serving to close the circuit having the alarm bells, lamps and the like, the release electromagnet of which is arranged in a second circuit that can be closed by door or window contacts, characterized in that this second circuit also has an automatic switch (« ), whose release electromagnet (s) can be excited from the outside by means of a third circuit by operating a push button (q) or the like. In a manner known per se. 1 sheet of drawings. berlin, printed in the REtcnsDRüäiEREi.