DE412464C - Call for help device with electric signal bell that can be activated by foot pressure - Google Patents

Description

There are already for banking or the like. electrical signaling devices that can be operated by foot pressure are proposed, but which on the one hand only emit brief signals, on the other hand quite complicated and are expensive. The signal device embodied according to the invention and shown below causes a sustained bell-bell after a single press of the foot and is a consequence their simple. Construction can be obtained cheaply.

In the drawing, an embodiment of the subject matter of the invention is shown, for example, namely
Fig. Ι a side view of the signal device, ν

Fig. 2 is also a side view, in which one side of the box of the device is removed and

Fig. 3 shows the arrangement of the signal device schematically.

That part of the signaling device which is influenced by means of a pressure exerted by the foot is arranged on the floor of the premises exposed to a possible attack. This part of the device is enclosed in a box α. In the interior of the box, a switch d provided with contacts b, c is arranged, in which at the end of the switch arm f a weight h hanging on a cord g is attached. In the interior of the box α a two-armed lever /, k rotatable about a bolt i is attached. The end of the lever arms is bent like a hook, and the end of the switching arm / can be hooked into the hook end of the arm /. The hook-shaped end of the arm k comes to lie between the legs of a rod which is inserted through an opening I located on the end wall of the box a . The electrical line going out from switch d leads to the neighboring bar or to the street or to where help is available.

can be waited, and there is an electric bell ο connected to the line at this point. .,.

The device works as follows: When the switch is open, the end of the switching arm / in the hook end of the arm; so that the contacts b, c of the switch d do not touch each other and the circuit of the bell ο is interrupted.

ίο If an assassination attempt is now committed against the bar equipped with the signaling device, all that is necessary is to step on the pole m located above the floor and the device comes into effect immediately. At the

t5 Depressing the rod m , the lever k, I is rotated in the direction of the arrow in Fig. 2 around the bolt i , whereby the switching arm f is free and the same by the weight h j in the direction of the other arrow

ao is pressed down. Contacts b, c now touch each other, the electrical circuit is closed and the bell ο gives a continuous alarm signal. When the danger is over, the bar m is first pressed down so that the arm j can be raised ; then the end of the switching arm f is pulled up and recently hooked into the hook end of the arm /. The switch is now in the open position again.

Instead of the weight h hanging on a cord g , a spring can also be provided which tends to push the arm f downwards and comes into effect when the end of the arm / the end of the arm / leaves.

Claims (1)

Patent claim: A call for help device with electric signal bell that can be switched on by foot pressure, characterized in that the switching arm (/) of the switch closing the bell circuit rests in the open state on one arm (/) of a two-armed lever (/, k) , while the other arm (k) this lever is hooked into the fork-shaped end (s) of the rod (m) that can be depressed by pressing the foot. Fig. df Fig. ₃ .