Electrical brazing anti-arcing control circuit

Details Electrical brazing anti-arcing control circuit Electrical brazing anti-arcing control circuit

1983-06-28

1985-07-09

Shaw, Clifford C.

Electric heating

Metal heating

For bonding with pressure

219 85G, 219 8641, 361 2, 361 91, B23K 1124

Patent

active

045284377

ABSTRACT:
To prevent arcing during an electrical brazing operation, the voltage drop across the brazing electrodes is sensed. When this voltage drop exceeds a predetermined threshold level due to arcing, a relay in a control circuit is picked up and its normally closed contacts open to interrupt the energization circuit for a brazing current contactor relay. The control circuit also is equipped to inhibit brazing if a discontinuity exists in its electrical connection across the electrodes. Also disclosed is a pistol grip electrical brazing tool having its electrode supporting and manipulating elements shunted from the brazing current carrying paths.

REFERENCES:
patent: 1248812 (1917-12-01), Costello
patent: 1280818 (1918-10-01), Nikonow
patent: 1959690 (1934-05-01), Roth
patent: 2183908 (1939-12-01), Gladitz
patent: 2267297 (1941-12-01), Campbell
patent: 2304975 (1942-12-01), Warrender
patent: 2402004 (1946-06-01), Adams
patent: 2542629 (1951-02-01), Clawson
patent: 2656446 (1953-10-01), Albarranc
patent: 3538293 (1970-11-01), Procacino
patent: 3758744 (1973-09-01), Spisak
patent: 4343010 (1982-08-01), Denny et al.

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