DE360484C - Safety device against unlawful removal of light bulbs - Google Patents

Description

(H 821 14th

The incandescent lamps installed in factories, public places and institutions are often unscrewed and stolen from the sockets by unauthorized persons. So you have different means and devices used to secure the lamps screwed into the sockets against theft.

The subject of the invention is now an improved and simplified compared to the ίο known Safety device through which the light bulb is protected against unlawful removal is protected.

The subject of the invention is first of all that the threaded basket of the socket, in which the lamp is screwed in, is slotted so that it can yield resiliently. The one that brings about the closure with the outer encapsulation is now placed on the threaded cage Porcelain ring screwed on, which according to the invention on its outer circumference is provided with a number of notches or cutouts in which a on the Socket cover adjustable up and down in a slot, lockable with a key Adjusting ring engages with its locking pin, so that the light bulb against unauthorized removal, screws is secured. For this purpose, the porcelain locking ring is with a conical thread provided so that the threaded basket of the socket when screwing this ring tight is pressed onto the base thread of the bulb. In order to have a particularly solid and permanent hold of the screwed together and secured by the outer locking rings To effect parts, steel points are attached to the inside of the threaded basket, which when tightening in the softer material

860484

of the base thread of the light bulb are pressed in, preventing unauthorized unscrewing the light bulb secured by the locking rings is completely impossible. The attached drawing shows the new one Incandescent safety device in one exemplary embodiment, namely shows:

Fig. Ι the same with screwed in and ίο secured lamp in longitudinal section,

Fig. 2 a section along the line AB in Fig. I,

Fig. 3 is a side view of Fig. Ι and Fig. 4 is a section corresponding to the Fig. I, but with the locking ring raised and the fuse loosened.

The threaded basket &, which is provided with slots c according to the innovation, is attached to the mounting stone a to which the lead wires are attached. so that it can be compressed resiliently. For this purpose, the lower closure with the socket casing d effecting the porcelain ring e is provided with a conical thread so that when this ring is screwed in, the internal thread of the slotted threaded basket h presses firmly against the base thread of the bulb and thus holds it in a clamped position. In order to increase this effect, the inside of the threaded basket & still blunt steel tips / are attached which, after the lamp has been screwed in, press into the thread of the lamp base g , which is made of softer material. So that the lamp that is firmly screwed to its base g by the porcelain ring e in the threaded basket b cannot be unscrewed again by unauthorized persons, furthermore, according to the invention, the edge of the porcelain ring e , which is provided with a conical thread on the inside, is provided with a number of notches h , in the locking pins i engage, which sit on the lower edge of a ring k attached above the toothed ring of this porcelain ring e.

The latter is with a three-way or

Square wrench to be loosened screw I in a slot m of the socket jacket d guided up and down adjustable and can now be moved down or up when loosening the screw, depending on whether the lamp is secured against unscrewing or whether it is to be released for replacement .

The mode of operation of the new facility is now as follows:

If the incandescent lamp is to be screwed into the socket and secured against unauthorized loosening, the screw I hidden in the ring k is first loosened using a socket wrench and the ring is lifted so that the porcelain ring e, which is provided with a conical thread on the inside, is screwed on and tightened can, where he presses the resilient threaded basket b with the steel tips firmly against the thread of the bulb base due to its conicity. The tips f are pressed into the softer material of the lamp base.

In order that the thus created attachment can not be solved 7 "by unqualified again, is the locking ring k according pushed down (Fig. Ι and 3), with the locking pins of the or cutouts latter h in the notches use of ceramic ring e, then that this, when the screw I is tightened for this Ringstellunig, can no longer be loosened. If, on the other hand, a new lamp is to be used, the screw I is loosened using a key so that the locking ring can be lifted, whereupon one can first unscrew the porcelain ring e and then the lamp again.

Claims (2)

Patent claims: _ i. Safety device against unauthorized removal of incandescent lamps from their sockets made compressible by slitting the threaded basket, characterized in that a Ponzellansioherungsring (e) provided with a conical thread is screwed onto the thread of the incandescent lamp base, and that the porcelain ring has notches (Ji) on the circumference is provided, in which locking pins · (i) of a superposed, the raised in a slot (m) of the socket shell adjustable ring (Jk) engage, by means of key problem to be solved, hidden in the ring (Jk) lying screw (/), and can be released from its locking of the base thread causing position when the lamp is to be replaced. 2. Safety device according to claim i, characterized in that in the interior of the threaded basket (Jo) truncated steel tips (/) are attached, which are through after screwing the light bulb. Press the resilient walls of the threaded basket using the porcelain ring, screw it into the softer thread of the bulb base and hold it in place. 1 sheet of drawings.