Rotary balancing apparatus
US4644123A · kind A · utility
Inventor
Key dates
| Filing date | Sep 18, 1984 |
| Grant date | Feb 17, 1987 |
| Priority date | — |
| Expiry date | Sep 18, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H9/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Balancing apparatus for performing in-process balancing of a rotary mass by capacitor discharge to deliver an arc to erode material from the mass. A capacitor bank is operatively coupled through a coupling circuit to electrode structure which delivers the arc to the mass. A trigger pulse is injected into the coupling circuit to initiate the arc discharge. The coupling circuit is so constructed and arranged as not to impair the effectiveness of the trigger pulse in initiating the arc, yet it provides no significant resistance to the high amperage capacitor discharge current which is enabled to flow to the electrodes once the gap between the electrode structure and the rotary mass has been broken down. Several embodiments of the invention are disclosed. One embodiment comprises multiple capacitor banks which are sequentially placed on-line. Associated with each capacitor bank is a "contactless switch". The contactless switch comprises a pair of contacts, preferably graphite blocks, having confronting faces forming a gap between them. A branch circuit shunts this gap and is selectively operable to selectively allow and disallow the gap to be broken down by the same trigger pulse that …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.