DE414198C - Waterproof screw socket for electric light bulbs - Google Patents

Description

The subject of the invention belongs to the class of waterproof screw mounts for electric incandescent lamps, where the flanged edge at the foot end is inwardly directed equipped metal thread basket in the equipped with the corresponding thread The insulating jacket is screwed in and the threaded basket simultaneously provides the conductive connection one of the supply lines makes with itself. In the known versions of this type, the center contact is through a special screw held. With the subject matter of the invention such a special fastening screw is not necessary because the screwed in The threaded basket also holds the center contact at the same time. The device is made so that the screwed-in threaded basket with its inwardly directed bead on both the outwardly drawn and bent lobes the contact sleeve for the threaded basket supports as well as an insulating piece at the same time specifies that against the second contact socket of the center contact connected to it

presses, its raised and bent lobes on a raised insulating saddle the frame sits on.

This creates a waterproof screw socket for electric light bulbs, which is easy to assemble, cheap to manufacture and well protected against short circuits; when assembling you need only introduce the leads in the usual way into the ίο contact bushes and by means of Set screws that lie within the inner rim of the threaded basket and are completely isolated from each other.

An embodiment of this water up th version is on the drawing for illustration brought.

Fig. Ι shows the version from below, seen against the threaded basket.

Fig. 2 shows a longitudinal section along line AB of Fig. 1.

Fig. 3 shows a longitudinal section along line CD of Fig. 1, seen against the insulating web, and illustrates the guidance of the bent tab of the central contact. Fig. 4 shows a section along line EF of Fig. 1 and illustrates the arrangement of the contact socket for the threaded basket with its legs and tabs.

The socket 1 made of insulating material has two parallel to each other on its inner bottom surface 2 lying to take up the contacts serving grooves 3 and 4 through the between insulating saddles 5 are separated from each other. The one with the contact socket 6 connected center contact is formed by a downwardly drawn and bent flap 7, which is open the lower straight surface of the insulating saddle 5 touches down. The contact socket 8 for the The threaded metal cage 11 has two lateral legs 9 which are bent over to form tabs 10 are. The metal threaded basket 11, into which the base thread of the lamp is screwed finds nut thread 12 in the insulating socket 1 and has at its inner end an inwardly drawn beaded edge 13. The threaded basket screwed into the socket 1 11 lies with its beaded edge 13 against the tabs 10 of the contact socket 8 for the threaded basket and thereby holds this sleeve 8 firmly. Between the contact socket 6 for the center contact 7 and the threaded basket 11 is an insulating piece 14 of such Dimensions provided that when the threaded cage 11 is firmly screwed in, the contact socket 6 is set for the center contact 7. This insulating piece 14 has a Cutout 15 to the fastening screw for the supply line in the center contact socket 6 to make accessible from the open end of the socket 1. The fastening screw 17 for the lead to be inserted into the contact socket 8 is within the Bead edge 13 can be reached.

To guide the contact socket 8 for the threaded basket 11, the socket 1 is on the corresponding side with a slot 18 parallel to the insulating web 5 and limited by this provided, so that when tightening the threaded basket 11, the contact socket 8 is can not move.

Claims (3)

Patent Claims: i. Waterproof screw socket for electric light bulbs in which the threaded basket with a beaded rim into the threaded basket equipped with the appropriate thread Socket is screwed in and after screwing in without mediation of a special contact screw in conductive Connection with one of the supply lines occurs, characterized in that the threaded basket screwed into the end position (11) with the beaded edge (13) against the in the plane of the beaded edge (13) bent tabs (10) of the contact sleeve intended for the threaded basket (11) (8) puts, while the same beaded edge (13) an insulating piece (14) against go the second, for the central contact (7) intended contact sleeve (6) presses, whereby the contact bushes (6 and 8) can be held in place immediately without using the usual screws. 2. Waterproof screw socket according to claim 1, characterized in that the insulating piece (14) has a cutout (15) around the head of the fastening screw (16) - to clamp the supply line for the center contact (7) in the contact socket (6) - to be exposed, while the fastening screw (17) - for the supply of the contact socket (8) for the threaded basket (11) - through the free space within the beaded edge (13) of the threaded basket (11) can be reached is. 3. Waterproof screw socket according to claim 1, characterized in that the contact bush (8) for the threaded basket (11) with its laterally projecting Legs (9) space, support and guidance in a slot (18) of the socket (1) lying parallel to the insulating projection (5) finds. 1 sheet of drawings.