Garage door position indicating system
US5402105A · kind A · utility
80Cited by
11References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 18, 1994 |
| Grant date | Mar 28, 1995 |
| Priority date | — |
| Expiry date | Apr 18, 2014 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/106
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A garage door position indicating system includes a tilt switch attached to a garage door, an RF transmitter coupled to the tilt switch, an RF receiver, and an indicator controlled by the RF receiver. The tilt switch supplies an enable signal to the RF transmitter at selected first tilt positions and blocks the enable signal at selected second tilt positions. The RF transmitter generates an RF signal in response to the enable signal. The RF receiver is responsive to the RF signal and controls an indicator to indicate the position of the garage door.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.