Thermal deburring apparatus and method
US4561839A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 11, 1984 |
| Grant date | Dec 31, 1985 |
| Priority date | — |
| Expiry date | May 11, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
To avoid venting of a deburring chamber and associated equipment after charge of the chamber with an explosive mixture if a spark plug (3a) has failed to ignite the mixture, a glow ignition block (4) is located in the path of gas communication between a mixing block (3) in which the spark plug is retained, and a glow plug (8) is located to have its glow portion exposed to the combustible gas mixture, preferably in a bypass (9) to a main gas path. A thermal element (12) monitors whether, upon application of an ignition pulse to the spark plug (3a), ignition has occurred by sensing a sharp temperature pulse; upon failure to sense such a temperature pulse, the glow plug is energized for ignition of the combustible mixture thereby. The spark plug may be of the vehicular internal combustion engine type; and the glow plug may, for example, be similar to "pre-glow" plugs used in vehicular-type Diesel engines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.