Electric lamp and discharge devices: systems – Condenser in the supply circuit – Arc machining
Patent
1984-06-15
1987-02-24
Chatmon, Saxfield
Electric lamp and discharge devices: systems
Condenser in the supply circuit
Arc machining
313 17, 313 20, 313619, 204178, 219383, 315175, 315240, 315245, 315172, H05B 3700, H05B 3900, H05B 4114
Patent
active
046459812
ABSTRACT:
For the glow discharge between a receptacle and a workpiece, the glow discharge path is connected in series with a first switch. A capacitor circuit is charged via the glow discharge path and two diodes. By closing a switch, the previously positive pole of the capacitor circuit is set to the zero potential, whereby the potential of the other pole is shifted negative. By closing a switch, the capacitor circuit is discharged through the glow discharge path while the first switch is closed. Upon the discharging of the capacitor circuit, the supply voltage continues to be present at the glow discharge path for the remaining pulse time. In the initial range, the voltage pulses have a pulse peak for ignition followed by a maintenance range, the height of which corresponds to the supply voltage.
REFERENCES:
patent: 2789242 (1957-04-01), Friedman et al.
patent: 2951969 (1960-09-01), Matulaitis et al.
patent: 3365612 (1968-01-01), Schierholt
patent: 3376470 (1968-04-01), Stone et al.
patent: 3483374 (1969-12-01), Erben
patent: 3504154 (1970-03-01), Marcolini
patent: 3955118 (1976-05-01), Flemming
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