Hand-held transmitter for transmitting different signals
US4218681A · kind A · utility
32Cited by
1References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1979 |
| Grant date | Aug 19, 1980 |
| Priority date | — |
| Expiry date | Feb 13, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/00928
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A hand-held transmitter for the wireless transmitting of signals for operating remote-controlled garage door installations or the like is disclosed. The transmitter comprises a signal generating device, an energy source, and a hand-operable transmitter switch built into the transmitter housing. The transmitter is capable of selectively transmitting at least two different signals and includes a switch which is position-dependent with respect to the force of gravity for selecting one of said at least two different signals to be transmitted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.