DE61535C - Fuse for electrical screw contacts. - Google Patents

Description

IMPERIAL

PATENT OFFICE. \%

In the case of patent no. 55527 protected fuse for electrical screw contacts, the fuse of the screwed into each other electrical circuit parts can also be achieved by the fact that instead of resilient tongues b \ Fig. 2 and 3, of patent no. 55527 one or more lugs or projections can be pressed into the bolt or nut thread made of sheet metal at one or more points. Is. the thread not made of resilient, but of rigid material, e.g. B. by Gufs, the security can be achieved by a tongue which is particularly attached to the one threaded part and which passes with its nose through a hole in the threaded part.

On the accompanying drawing, the first device is shown in FIGS. 2 and 3, the second illustrated by FIG. 4.

The nose b ² , Fig. 3, pressed into the nut thread b of the mount g , takes the place of the resilient tongues b ¹ (Fig. 2 and 3 of the patent No. 55527). This arrangement of lugs or projections can, however, only be made with threads which are made of resilient sheet metal, so z. B. bark with nut threads made of pressed brass sheet, such as those used in incandescent lamp sockets.

When the bolt thread is screwed in, the nut thread springs in itself so much that, in the same way as with the resilient tongues, the nose b ² continuously with such force into the corrugations, e.g. B. in the corrugations α of a lamp base thread (Fig. 1) fafst that an automatic reverse rotation cannot occur, but a reverse rotation by hand is easily possible with appropriate effort. Of course, the pressed-in nose can also be arranged in the bolt thread if this consists of resilient sheet metal and the nut thread has the corrugations.

The effect of the screw locking described above is very good and has in particular in the case of screw contacts with a thread made of pressed brass or other sheet metal resilient tongues over the advantage that a relaxation resp. Waning in strength, which after all is not to be regarded as completely excluded with resilient tongues, completely is avoided.

In FIG. 4, it is assumed, that the nut thread b containing portion of the Contactes durch.Gufs is made; .click the fuse is held by resilient tongues or protrusions b ¹ b ^'2 brought about by, that at the m. Sleeve or nut cut out accordingly and then a spring Z> ⁴ provided with a nose b ^{s is} screwed from the outside to the sleeve, which spring with the cutting edge b ³ passes through the opening m, so that when screwed together it enters the corrugated

Thread turns α of the bolt thread (Fig. I) and a reverse rotation can only be done by hand.

Claims (1)

Patent claim: In the case of patent no. 55527 protected fuse for electrical screw contacts the replacement of the resilient tongues (b ¹ ) by projections or lugs (b ^) pressed into the bolt or nut thread made of resilient sheet metal or by springs attached to the sleeve containing the nut thread (b) (b * ) with cutting edge (b ^s ), which the latter pass through openings (m) of the sleeve or nut and grip into the grooved threads (a) of the bolt thread. For this purpose ι sheet of drawings.