Touch switches

Details Touch switches Touch switches

1976-09-23

1978-11-14

Schaefer, Robert K.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

340365C, H01H 3500

Patent

active

041257839

ABSTRACT:
A touch switch having two electrodes, one of which is driven by a pulse signal having a fast leading edge, and the other of which is connected to a logic detector circuit which is selectively triggered by said leading edge. The detector circuit operates to compare the pulse signal passed via the electrodes with one passed directly from the drive pulse generator, and gives an output to a triac trigger circuit dependent upon the amplitude of the signal coupled from one electrode to the other.

REFERENCES:
patent: 3660838 (1972-05-01), Gove et al.
patent: 3879618 (1975-04-01), Larson
patent: 3992634 (1976-11-01), Larson
Williams, J. A., Touch Sensing Circuit, IBM Technical Disclosure Bulletin, 6/74, pp. 166-167.

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