Antenna relay method and apparatus
US4672278A · kind A · utility
8Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 2, 1986 |
| Grant date | Jun 9, 1987 |
| Priority date | — |
| Expiry date | Oct 2, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An antenna motor drive system for raising and lowering an antenna. Response to a user input for raising or lowering a vehicle antenna is delayed to avoid rapid reversals of the antenna drive motor. This avoids the large surge currents associated with the prior art. The circuit monitors drive circuit response and de-energizes the motor if an inappropriate response is sensed after a certain period. Use of switching transistors rather than a relay facilitates implementation of the invention in integrated circuit form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.