Energy conservation system
US4037141A · kind A · utility
2Cited by
3References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1976 |
| Grant date | Jul 19, 1977 |
| Priority date | — |
| Expiry date | Jul 1, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0036
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An energy conservation system is disclosed wherein power in a given area, such as in a hotel or other room, is controlled by means of an ultrasonic sound transmitter and a plurality of ultrasonic sound receivers, each receiver controlling power for a separate power outlet. Upon entering the room, a key is inserted into a key receptacle to activate the transmitter and thereby cause the receivers to couple power to the power outlets in the room. When the key is withdrawn from the key receptacle, the transmitter signals the receivers to decouple power from the power outlets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.