Touch actuated system responsive to a combination of resistance and capacitance
US4053789A · kind A · utility
13Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1976 |
| Grant date | Oct 11, 1977 |
| Priority date | — |
| Expiry date | Aug 27, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/962
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A system that is responsive to the touch of an animal, and is activated by a combination of the inherent body capacity of the animal and the application of a skin resistance to a detector means. A digital oscillator provides two pulse outputs that are compared in a pulse processing means. One of the pulse outputs is fed to a touch responsive area, that in turn is connected to the pulse processing means, a buffer amplifier and a load. The touch responsive area activates the pulse processing means whenever the touch responsive area is bridged by a resistance and at the same time a body capacitance exists to ground.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.