Water supply control system
US5063622A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1990 |
| Grant date | Nov 12, 1991 |
| Priority date | — |
| Expiry date | Oct 4, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/9502
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A water supply control system has a faucet actuating means for actuating a water supply faucet to supply water, a light-emitting means for intermittently emitting light at at least a first period, a light-detecting means for detecting light emitted from the light-emitting means and reflected by a portion of the body of a user of the faucet, and for producing a detected signal indicative of whether the light is detected or not, and a control means for controlling the faucet actuating means to actuate the faucet based on the detected signal from the light-detecting means. The control means comprises an auxiliary light-emitting means for enabling the light-emitting means to effect a plurality of light emissions at a second period shorter than the first period, based on the detected signal from the light-detecting means, and a decision means for applying a control signal to the faucet actuating means to control the faucet based on the number of times in which the light is detected by the light-detecting means, among the light emissions caused by the auxiliary light-emitting means through the light-emitting means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.