DE407104C - Electrical alarm contact arrangement against burglary and theft with the contactor influencing, serving as a passage blockage - Google Patents

Description

GERMAN EMPIRE

ISSUED DECEMBER 11, 1924

REICH PATENT OFFICE

PATENT LETTERING

- JVI: 407104 CLASS 74a GROUP 22

Egon Lewin in Charlottenburg.

Electrical alarm contact arrangement against burglary and theft with the Contactor influencing tension threads serving as a passage block.

Patented in the German Empire on January 19, 1923.

The invention relates to electrical burglar alarm contact arrangements and theft with the contactor influencing, serving as a passage block Tension threads. According to the invention, the movable contact part, which, as is known, when triggering, e.g. B. by tightening or tearing a thread, in a permanent contact closing blocking position passes, by means of an externally through a key The device to be operated is brought into the alarm-free position and locked in it can be.

The drawing illustrates the invention on the basis of two exemplary embodiments the thread contact arrangement.

Show it:

Fig. Ι and 2 the one embodiment of the thread contact arrangement in the two main layers,

Fig. 3 and 4 the second embodiment in a corresponding representation,

Fig. 5 is a view of the outside of the housing,

Fig. 6 a section through Fig. 3 along the line AB, \

Fig. 7 and 8 details. According to Fig. 1 and 2 in a housing α rotatably arranged about an axis b movable contact part c, around whose bow-shaped leg d the locking thread / is placed, limited by a stop h in the: alarm-free position. When the locking thread is torn '/! Or. When it is tightened against the tension weight g , the movable contact part c, d with the counterweight /, which can also be replaced by a spring, moves into the contact position shown in Fig. 2, in which between the parts A ₁ and A ₂ in a known manner a permanent contact is closed by the TeHeZe ₁ and A ₂ interlocking directly or otherwise connected special locking parts in such a way that the locking and thus the contact is not canceled again without external intervention. The cancellation of the blockage or the permanent contact 'tes between the parts A ₁ and A ₂ , which can also be formed vice versa, takes place, for. B. by means of a socket wrench which is introduced through the bore / in the outer wall of the housing α and thereby _{detaching the contact parts A 1} and A ₂ from each other. The separation of the contact _{parts A 1} and A ₂ from one another could also take place from the outside by means of a release pin or the like that can be displaced in a slot guide, and this _; The trigger pin can then according to the invention in its lower position at the same time the movable contact part in its alarm-free position for disabling the contact! hold direction. !

In the. 3 to 8 illustrated embodiment, the alarm contact arrangement, the movable contactor is by fig c, d with a b on the same axis of rotation mounted inside lever C ₁ is provided, which carries the contact portion and the "taken \ lever c in the contact position, 'in this Location but is blocked regardless of the contact part c, d.

To cancel the permanent contact between the contact parts A ₁ , A ₂ , a small socket wrench m (Fig. 8) is used, the tip of which is inserted into the lower extension O _{1 of} a slot ο in the outer plate of the housing ¹ α (Fig. 5 and 6) inserted and pulled up in the slot ο up to the expansion O _{2 of} this slot. The hook-shaped bent lower end / J _{1 of} a cranked leaf spring ρ slidably arranged in a small secondary housing O _{1 takes} the contact part C ₁ with it at its ¹ rear extension C ₂ and presses the other lever arm C ₁ as well as the contact part c, d into the lower alarta-free position. The spring p, p _t (Fig. 7) has a recess q ₂ into which one of the projections r ₁ and r ₂ attached to the housing α can engage in the end positions of the spring. In this way the spring is held in the end positions. To release the spring or to move it into the other end position, the spring must first be pressed off from the respectively engaging projection r _x or r ₂ by means of the key m. According to the invention, the reset device also serves to block the contact parts in the alarm-free position until the blocking spring p, p _x is pushed down by means of the key m in order to be ready for alarm.

The head of the key m is designed in such a way that the key can only be inserted into the slot 0 in the two end positions or withdrawn from the same.

Claims (2)

Patent Claims: i. Electrical alarm contact arrangement against burglary and theft with the Contactor influencing, serving as a passage blockage, thereby characterized in that the movable contact part, which, as is known, when triggered, z. B. tightening or tearing of the security thread moves into a permanent contact closing position, brought into the alarm-free position by means of a device to be operated from the outside by a key and can be locked in it. 2. Arrangement according to claim 1, characterized in that a displaceably arranged spring (p, P ₁ ) is used as a restoring and locking device, which can be brought into the two end positions by means of a key in which the spring is locked, and from which it can only be moved using the key (/ 77). 1 sheet of drawings.