DE407673C - - Google Patents

Description

GERMAN EMPIRE

ISSUED JANUARY 2, 1925

REICH PATENT OFFICE

PATENT LETTERING

- JVi 407673 CLASS 21c GROUP 10

(Z 13QOJ VIII 2ic ^l j

Joseph E. Zink of Palo Alto, Calif., V. St A. Wall gauge for electrical wiring.

Patent in the German Empire from 22nd July 1923.

The invention relates to a wall bushing for electrical lines that consists of an insulating tube and two resilient washers supported against it. It is known to lead electrical lines through walls, in which an insulating tube initially is pushed through the wall and through which the wire is then laid. This pipe is then against displacement

ίο secured in the wall by the fact that one End of the pipe ends in an extension that extends against one face of the wall lays, and that a washer is then pushed onto the tube, which has a has an opening from which a number of slots run radially outwards in a star shape, however, they do not go to the edge of the pane. The hole has a slightly smaller diameter than the insulating tube, and

ao through the slots it is made possible slide the pane onto the insulating tube, with the individual parts of the pane, which between the slots are bent outwards. Such a device makes it possible to secure the insulating tube against displacement. But it is almost impossible to detach these disks from the insulating tube again, so that it is very difficult will, if necessary, remove such a pipe from the wall.

The present invention differs from this known device in that that the disks on their one end face mi "one against the center of the disks be provided to run chamfer and that a slot from the edge of the discs goes through to the middle opening.

The drawings represent an example of execution represent.

Fig. Ι is a view and a partial section of a pair of electrical conductors with attached insulating tubes.
j Fig. 2 shows a disc for holding J these tubes in front view.
j Fig. 3 shows on a larger scale a section through such a disk in the working position, and

Fig. 4 is a section along 4-4 of Fig. 2.

The holding device according to the invention consists of a disc 1 which is provided with a hole 2 in its center. One side of this disc is bevelled towards the center at 3, so that in the vicinity of the hole 2 a thin, wedge-like edge is formed. Furthermore, this disc is slotted at 4, and the slot does not run from one side of the disc to the other in a plane parallel to the axis of the disc, but, as can be seen from Fig. 4, the boundary walls 6 and 7 of the slot parallel, but set at an angle.

The usage is as follows: An insulating tube 8 is in the wall 9 or in a other part of the building, beams or the like. The wire 11 is then through this Tube pulled through in a known manner. One of the retaining washers 1 is then opened this wire is applied in such a way that the beveled surface 3 moves towards the tube 8