DE371281C - Electrical safety device in the form of a curtain arranged in front of the areas to be protected, stretched in closed current contacts - Google Patents

Description

The present invention is an electrical safety device for Protection against burglary through windows, doors, walls and ceilings in the form of a front door A curtain arranged to be protected and suspended in closed-circuit contacts.

There are already safety devices of a similar construction are known in which in window openings, etc. contact frames with ίο fabric or wire mesh tension are used so that an alarm circuit is switched on by pressing the covering. Such constructions have the major disadvantage that the safety device can be made ineffective by burning out or cutting out the frame insert. This! Deficiency is remedied according to the present invention in that instead of the frame to be used each time in front of the surfaces to be protected, a curtain that can be pulled open in the manner of the usual curtains is clamped between contacts, which are connected in a known manner in a quiet drink circuit and both at the \ ^r orhanges and by cutting orf burning of the curtain or the pull cord to interrupt touching or vibration upon release or cessation of the voltage closed circuit in order to alarm output.

The invention is illustrated in the drawing in an exemplary embodiment, namely shows

Fig. Ι the overall arrangement of the Sichei * - health device while

Fig. 2 shows a section through the corner contact, Fig. 3 through the lower center contact and AbIx 4 through the side hook contact on an enlarged scale when closed Shows closed circuit.

In the figures, a is the curtain, the ends of which are suspended from the upper winding roller b in the upper, resilient corner contacts c , while the lower terminating rod d is releasably hooked into the hooks of the same lower contacts c and the middle closed-circuit contact e. The lowered curtain is taut after being hooked into the lower hazard contacts c and the middle closed-circuit contact e , as is the pull cord f hooked into the lateral closed-circuit hook contact g .

The hazard contact c consists of a jacket housing h, which is closed on one side by an exchangeable insulating base i . This base i carries two contacts j ¹ ,] ² , via which the closed-circuit current line 0 is routed. With a contact j "is a hingedly suspended closing lever k permanently connected, that of a m by means of a spiral spring in the housing H mounted tie bolt / j against the contact is pressed ^l, as long as the taut \ ^T curtain descends not affected. In each Pressure or pull that is exerted against the curtain α is pulled off the tension bolt /, the locking lever h is pressed off the contact j ¹ by the spring η and thus the closed circuit ο is interrupted.

The middle closed-circuit contact e and the lateral hook contact g are designed accordingly. In the middle closed-circuit contact e , when the closed-circuit circuit o is closed, that is, when the curtain a is lowered and tensioned, the

K closing lever under the action of the spring η against the hook-like ending contact y ¹ is pressed, as by the voltage of the curtain of the tie bolt α I against the pressure of the spiral m bit is pulled out of the housing. When cutting through the curtain α , the spiral m pushes the tie bolt I back and this in turn pushes the locking lever k from the contact j ¹ , so that

ίο the quiescent current ο is interrupted.

When the closed circuit is closed, the closing lever k of the hook contact g presses the contact spring of the contact j ² against the contact j ¹ by tensioning the pull cord f against the tension of the spring q . When the cord f is cut, the spring q pulls the closing lever k back, so that the contact between the contacts j ¹ and j ² and the quiescent current is interrupted.

The resilient corner contacts c and also the two contacts e and g are connected in series through the closed-circuit line 0 , so that they are short-circuited when the curtain is closed, with the closed-circuit current running through all contacts in the direction of the arrows and in the control lamp p connected in series with the relay electromagnet r ends. This control lamp p is used to determine whether all contacts are closed. It can also serve as night lighting, as is customary in shops, etc. If the curtain is touched or shaken, or if pressure is exerted in any direction on the curtain surface or the pull cord, then one or more of the corner contacts open, since they give way to the pressure resiliently. If the curtain α or the pull cord f is destroyed, for example by cutting or burning, the contacts e and g open. By breaking a contact, the line c and thus the relay r is de-energized, so that the armature ^ on the relay r drops out and the alarm circuit t is switched on through the lever u and the contacts ν and w , whereby the alarm bell χ is activated.

In addition to the alarm bell x, most advantageously on the outer front of the house, a second alarm bell 31 and a box 2 to be illuminated from the inside with a corresponding label is connected to the alarm circuit p so that the inner and outer alarm bells are activated at the same time is set and the box s is lit with the inscription.

You can of course attach this device to any room curtain and thereby prevent boarding even with the window open.

When securing larger areas, more contacts are attached accordingly. By replacing the base i , the fuse contact can be used for both closed and working currents and also for systems with both types of current.

Claims (3)

Patent Claims: 1. Electrical safety device in the form of a curtain arranged in front of the surfaces to be protected, stretched in closed-circuit contacts, characterized in that the curtain (<z) with the ends of its upper winding roller (b) is rotatably suspended in the hazardous contacts designed as resilient corner contacts (c) and with the ends of its lower firing rod (d) can be hooked into the same contacts (c) , whereby the contacts (c) are set to protect the surface, when the curtain is touched or vibrated, individually or jointly give way and thus the closed circuit (0) interrupt to issue an alarm. 2. Electrical safety device according to claim 1, characterized in that in addition to the resilient corner contacts (c) additional closed current contacts ( e or g) are provided, which are kept closed by the voltage of the curtain (a) and when the voltage decreases or ceases Cutting or burning the curtain (0) or the pull cord (f) also interrupt the closed circuit (0). 3. Apparatus according to claim 1, characterized in that the suspension eyes for clamping the curtain (a) are carried by a tie bolt (Z) which is in a casing > (Ji, Fig. 2) by means of a spiral> (m) o. the like is resiliently mounted. and the closing Bebel (k) of the worn contact device from the upper interchangeable in the casing housing (Ji) terminating base used (i) presses against the contact piece, so that the .Ruheströmkreis (0) is closed in the rest position of the safety device. 1 sheet of drawings.