Electric heating – Heating devices – Tool or instrument
Patent
1980-10-14
1983-01-04
Bartis, A.
Electric heating
Heating devices
Tool or instrument
219 85D, 219 90, 219230, B23K 304, B23K 928, H05B 302
Patent
active
043673970
ABSTRACT:
An electric work-in-circuit tool has a pair of fiber-reinforced plastic arms connected in tong fashion and limitedly opened by a spring. The free end of each arm has an integral flange apertured to receive bolts for assembling with, and attaching to the arm, a plurality of centrally apertured metal discs which are spaced by metal washers to form a heat-dissipating unit. The heat-dissipating unit spacedly surrounds the rear part of a metallic conductor body which has an axial bore to receive the bared end of an insulated power supply conductor passing axially through each tong arm. The conductor body also has a reduced-diameter front extension supportingly received in either a longitudinal or a transverse bore in the rear end of a metallic electrode holder whereby the electrode holder may be oriented either longitudinally or transversely of the conductor body. Each electrode holder has a longitudinally extending rabbited seat for dove-tailed slidable reception of a tapered carbon electrode-block. A handle-mounted micro-switch is positioned, as for thumb operation, to control the low-amperage high-voltage circuit to a step-down transformer for supplying a low-voltage high-amperage power to the pair of electrode blocks.
REFERENCES:
patent: 916140 (1909-03-01), Fulton
patent: 2844697 (1958-07-01), Emmerson
patent: 3510623 (1970-05-01), Wulgast
patent: 3924332 (1975-12-01), Rauch et al.
Bartis A.
Staubly Ralph F.
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