Contact device for heavy electrical currents

Details Contact device for heavy electrical currents Contact device for heavy electrical currents

1983-01-12

1985-03-19

Tarcza, Thomas H.

Electricity: circuit makers and breakers

Fluid pressure

Diaphragm

200248, 200DIG42, H01H 3540

Patent

active

045061238

ABSTRACT:
An electrical contact device for transmitting heavy currents between relatively rotatable parts, for example between a fixed welding transformer and a rotatable unit which supports a spot welding gun. The contact device comprises a spaced-apart pair of annular, axially fixed, contact segments on one unit and, between these, an axially displaceable pair of annular contact disks on another unit. The disks are urged towards each other by springs and are thereby centered by a centering device to provide a well-defined clearance between each contact disk and the confronting contact segment, and the disks are pressed outwardly against the co-acting contact segments, to eliminate said clearances when current is to flow therebetween, by an annular operating device. The contact device has particular utility in robotics and prevents wear at the contacting surfaces on the appearance of relative rotation therebetween.

REFERENCES:
patent: 2421797 (1947-06-01), Malone
patent: 2927984 (1960-03-01), Turek
patent: 3631389 (1971-12-01), Elliott
patent: 4348575 (1982-09-01), Hedren et al.

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