Siemens Aktiengesellschaft

Guenter Bialkowski

Roman Renz

Gerhard Peche

Dieter Gerlach

A contact configuration, whose axially opposed contacts have a current-supplying stud, a cup-shaped contact carrier and a contact plate set up on the rim of the contact carrier, a support consisting of material with poor electrical conductivity being provided to mechanically stabilize the contact plate. The support forms a tubular supporting region and is located on a graduated circle whose diameter is at most equal to the diameter of the current-supplying stud. The diameter of the current-supplying stud thereby equals at least 50% of the external diameter of the contact carrier. The length of the support has a considerably smaller cross section in its middle than in its base and top region so that the ohmic resistance of the support is at least approximately one magnitude greater than the ohmic resistance of the contact carrier and contact plate.

Contact configuration for a vacuum interrupter

For generating an axial magnetic field over the contact surfaces in vacuum switching tubes, conductor loops which are constructed in a fashion similar to a spoked wheel are disposed following the contact members. In order to dimension such conductor loops with a low cross-section and in order to also be able to manufacture them in a simple fashion, it is proposed that the conductor loops contain at least approximately circular sector-shaped terminals, that these terminals merge into webs and that terminals following one another in circumferential direction are alternately connected electrically conductive in low-resistant fashion to the end face of a stud or to the terminal surface of a contact member.

Switch contact for a vacuum switching tube

A low voltage contactor switch has three simultaneously actuated pairs of contacts each of which consists of a movable and a fixed contact, with contacting occurring in a single evacuated area within a vacuum tube for minimizing oxidation of the contact surfaces and thereby increasing contact life. The contacts are connected to terminals which extend through walls of the vacuum tube in air tight fashion with actuation of the movable contacts being undertaken with the use of an air-sealed bellows. Each contact pair may be individually isolated by a cylinder within the evacuated area surrounding each contact pair as well as by a Y-shaped plate dividing the evacuated area into three chambers.

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Berlin, Germany

Guenter Bialkowski