Electrical resistance welder for nails used in an automatic nail

Details Electrical resistance welder for nails used in an automatic nail Electrical resistance welder for nails used in an automatic nail

1981-09-23

1983-10-11

Shaw, C. C.

Electric heating

Metal heating

For bonding with pressure

219 56, 219113, 219116, B23K 1100

Patent

active

044094612

ABSTRACT:
In an electrical resistance welder, whenever a material to be welded approaches the welding electrodes, a start signal is produced, so that welding current is supplied to the welding transformer in one direction for a certain period of time set by a time limit circuit, with the polarity changing in response to the start signal, whereby, even if materials are repeatedly fed for welding at high speed, they can be positively welded in a uniform manner.

REFERENCES:
patent: 2784405 (1957-03-01), Working
patent: 3083369 (1963-04-01), Peterson
patent: 3398255 (1968-08-01), Aldenhoff
patent: 3436514 (1969-04-01), Broomhall et al.
patent: 3442374 (1969-05-01), Hillier
patent: 3478872 (1969-11-01), Becht
patent: 3632949 (1972-01-01), Thorne
patent: 3892941 (1975-07-01), Lehle

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