Pulse generator spark-erosive metal working
US4766281A · kind A · utility
30Cited by
4References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1987 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Nov 13, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H2300/20
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pulse generator for spark-erosive metal working contains a charge regulator circuit for charging a storage capacitor. A storage capacitor is sinusoidally discharged across a switching device to a spark gap. Charging always occurs in a defined manner independently of the preceding pulses, so that uniform pulses can be generated. The storage capacitor is charged with an energy excess of required for discharge and the energy still remaining after spark discharge is recovered in a d.c. voltage source. The switching device (3) is non-conductive only when the discharge current has substantially decayed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.