Remote television control
US3988680A · kind A · utility
Inventor
Key dates
| Filing date | Apr 11, 1975 |
| Grant date | Oct 26, 1976 |
| Priority date | — |
| Expiry date | Apr 11, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J1/22
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A remote television control includes a hollow floating knob which is engaged on the television tuner shaft. Inside the knob is a torque-applying mechanism such as a unidirectional clutch or ratchet for imparting torque to the tuner shaft. A flexible coaxial force applying means extend between the torque-applying mechanism and a control including a solenoid which is actuated by means of an acoustical switch tuned to respond to an acoustical signal of a selected frequency emitted by a remote source. When the solenoid is actuated, it moves the force applying means which, in turn, reacts against the knob and activates the torque-applying mechanism inside the knob so that the tuner is rotated to change the channel of the television receiver. The control also includes a switch which is actuated when the knob is indexed to an unused channel position in order to turn the televison set off. Alternatively, the television set is turned on or off independently of the channel position of the tuner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.