DE1692558U - CONTACT SPRING WITH PRECIOUS METAL CONTACT. - Google Patents

Description

PA.73477 & -Ü1Z54

fiSUIB I (τ. ■ Eürth, December 10th

OElektro-Mechanical Research Institute 72-Fl Inn · Max G-rundig

Fürth (Bavaria), Kurgartenstrasse 37. Reg «506

Contact spring with flexible metal contact

The subject of the fire is a contact spring with a precious metal contact » as it is used for Eelais "and other electrical Sehalteinrichtung · under a precious metal contact a contact either made of a precious metal, e.g. "B" silver "or a precious metal alloy, e.g. palladium-silver, or another metal suitable for contact purposes with precious metal-like Properties are understood

The contact springs with noble metal contact are generally the contacts by precious metal rivets or welded or * Hard-soldered metal plates made of a noble metal or the like (e.g. tungsten) relatively expensive to manufacture

The fire suggests a contact spring that can be produced more economically of the kind in Eede, which is characterized by a läeln.etallkontakt distinguishes its connection with the EontaktfederbUßch by electrical welding of a Bdelmetalldrantendes * This enables the precious metal contacts to be produced quickly and without waste from a tapered roll of stainless steel wire from reach »

■ - 2 -

—2 -. Reg »

■ The following is an exemplary embodiment for the fire on Hand of Figures 1 to 3 described. Of these figures, FIG. 1 shows the appearance of a relay control spring, as well as the FIG. 2 shows the associated top view. FIG. 3 shows an enlarged cross section through a contact spring piece with the welded-in Contact shown *

The contact spring 1 is made from a larger contact spring plate, e.g. punched out spring bronze sheet and has the usual holes for the fastening screws (2), for the pimple (3) and the connecting wire (4) to * During the manufacture of the contact 5, shown on an enlarged scale in FIG. 3, a running noble metal wire roll from the particularly tapered wire end 6 fed to the contact spring plate 1 under pressure. When the end of the wire touches the contact spring plate The welding process begins, during its brief duration the tapered part 10 of the wire end into the contact spring material pressed in, and a little wide pressed * woydurch a relatively large, solid and highly conductive welded joint is achieved. The "contact head 7 is made by pressing of the free end 8, indicated by a dashed line, of the precious metal diamond piece 9 cut to the necessary length.

Claims (1)

■ £! 4734778 ^ 11254- - 3 - ■ '- ■. Reg, 50 & Protection claims 1 * Contact spring with precious metal contact, marked by a precious metal contact (5) »whose connection with the Contact spring plate (l) by electrical welding a precious metal wire end (6) is made 2 · Contact spring according to claim 1, characterized by a precious metal contact, its connection with the contact spring plate is made by electrical welding of a tapered Bdelmetall wire end (6) * 3 «contact spring according to claim 1 or 2, characterized in that the electrical welding with the Eontakt spring plate the connected noble metal wire end (6) is pressed into the contact spring sheet material at least towards the rope » 4 * Eontakt spring according to claim 1, 2 or 3, characterized in that that the contact head C?) is produced by pressing a piece of noble metal wire cut to the necessary length is·