Electric heating – Metal heating – Cutting or disintegrating
Patent
1978-06-02
1985-03-26
Shaw, Clifford C.
Electric heating
Metal heating
Cutting or disintegrating
219 69C, B23P 102
Patent
active
045075336
ABSTRACT:
A power-supply circuit for electrical machining of all types in which a tool is juxtaposed with a workpiece, the circuit having an alternating current input connected to the mains and receiving the alternating current at the mains' frequency, a rectifier connected to the input for converting the commercial alternating current to direct current, a solid-state switching device for converting the direct current to a high-frequency signal, a transformer whose primary winding receives the high-frequency signal and which produces a high-frequency output at a desired voltage level, a rectifier connected to this transformer at its secondary, and switch means for transforming the direct-current output of the latter device into the machining signal. The system permits the transformer to be of substantially reduced size by comparison with transformers used in earlier high-power electrical machining systems.
REFERENCES:
patent: 3305767 (1967-02-01), Beihl et al.
patent: 3485988 (1969-12-01), Sennowitz
patent: 3504152 (1970-03-01), Livshits et al.
patent: 3504154 (1970-03-01), Marcolini
patent: 3728516 (1973-04-01), Daspit
patent: 3943321 (1976-03-01), Pfau et al.
patent: 4017705 (1977-04-01), Bazhenov et al.
patent: 4048468 (1977-09-01), Maule
Dubno Herbert
Inoue-Japax Research Incorporated
Ross Karl F.
Shaw Clifford C.
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