Plough Book Sales

Patents included are:

• 1992 Power unit for electric discharge machine
• 1990 Electrical discharge machining control unit
• 1989 Capacitor-Type pulse generator for electrical discharge machining
• 1988 Electrical Discharge machining power supply
• 1984 Superimposed high striking voltage power supply circuit
• 1984 EDM method and apparatus with a continuous DC supply using stray gap capacitance to trigger discharge
• 1981 Electrical discharge machining power supply with digitally controlled on and off time and protection system
• 1981 Power output module for electrical discharge machining power supply circuit
• 1977 Electrical discharge machining power circuit
• 1973 Regulator for an EDM power supply
• 1973 Electrical discharge machining power supply with protective system for output switch failure
• 1973 Electrical discharge machining power supply circuit
• 1968 Saturable reactor type control system for electrical discharge machining apparatus

Code No. 009247