Rotator with remote indicator and self-synchronization
US4109191A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 1977 |
| Grant date | Aug 22, 1978 |
| Priority date | — |
| Expiry date | Jun 3, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D3/1481
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An antenna rotator of the type including a first remote drive motor for rotating a remote shaft and a control unit including a second motor for driving an indicator-control member into alignment with a preselect member is described. Self-synchronization and de-energization of the two motors is provided herein when the shaft has been rotated to an end stop position and the indicator-control member is not in alignment with the preselect member. This self-synchronization and de-energization is achieved by sensing the increased current levels caused when the first motor is prevented from rotating by the end stop to apply the energizing potentials being applied to the first motor directly to the second motor whereupon the indicator-control member is aligned with the preselect member and both motors are de-energized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.