Revolution limiters
US4171687A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 7, 1977 |
| Grant date | Oct 23, 1979 |
| Priority date | — |
| Expiry date | Mar 7, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P1/103
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A revolution limiter for internal combustion engines having a circuit for detecting when the engine revolutions exceed a given maximum permitted value, and a circuit for limiting the voltage on the primary winding of the coil comprising a semiconductor device which will breakdown above a given threshold voltage and a semiconductor switch connected in series between the terminal of the primary winding remote from the positive line connection and ground, the semiconductor switch being rendered conductive by the detection circuit in order to limit the voltage on the primary winding of the coil and thus prevent a spark occurring when said given limit is exceeded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.