Solid-state touch-responsive switch circuit

Claim 2

A touch-responsive switch for the control of a logic output according to claim 2, in which there is a reset key connected to the base of said first mentioned transistor, and also to said transistorized output control circuit.

Claim 3

A touch-responsive switch circuit for the control of a logic output according to claim 1, in which the clock pulses are normally grounded by said first transistor when said transistor is conducting and said transistor is turned off, and said transistor is nonconducting to ground when the base is grounded by touching said ground reference key.

Claim 4

A touch-responsive switch circuit for the control of a logic output according to claim 4, in which the output circuit is a pulse-amplifying circuit comprising the combination of a first, second and third NPN transistor; A. the base of said first transistor being coupled to the collector of said first mentioned transistor and normally being maintained in a nonconducting state; B. the second of said pulse-amplifying transistor having its base coupled to the emitter of said first pulse amplifying transistor and normally being nonconductive; C. the third of said pulse-amplifying transistors having its base coupled to the collector of said first pulse-amplifying transistor and normally being conductive; and D. the emitter of said third transistor being coupled to the collector of said second transistor and also connected direct to the logic output of said switch.

Claim 5

A touch-responsive switch circuit for the control of a logic output according to claim 5, in which there is provided a feedback circuit from the output to the base of said first-mentioned transistor adapted to hold the output of said switch in a positive conducting position after the finger grounding the reference key has been removed.

Claim 6

A touch-responsive switch circuit for the control of a logic output comprising the combination of: A. a power terminal adapted to be connected to a power supply; B. a normally conducting NPN transistor (having a collector, base and emitter), the collector of said transistor being connected to said power terminal through a resistor and the base of said transistor being also coupled to the power terminal through a second resistor; C. a clock-pulse generator connected between the emitter of said transistor and a ground; D. a second NPN transistor being normally nonconductive; E. the base of said second transistor being coupled to the collector of said first NPN transistor and also coupled to said power terminal through a back-biased diode, the emitter of said transistor being coupled direct to ground and the collector to said power terminal; F. a third transistor, said transistor being a PNP transistor having its base coupled to said power terminal and to the collector of said second transistor, the emitter of said transistor being coupled direct to said power terminal and the collector of said transistor being coupled direct to a 1 logic output and also to the base of said second transistor through a resistor; G. the collector of said second transistor being coupled to an 0 logic output and also to the base of said third transistor; H. a ground reference key adapted to be touched by a finger, said key being connected direct to the base of said first transistor, said first transistor being normally conducting from said power source to said ground and being switched to a nonconductive state upon the grounding of the base by touching said key, whereby said second transistor is switched from a nonconductive to a conductive state; and I. a capacitor coupled across the base of said second transistor and the collector of said third transistor adapted to keep said second transistor conducting after the finger has been removed from said ground reference key.

Claim 7

A touch-responsive switch for the control of a logic output circuit according to claim 7, in which there is a reset key connected to said capacitor and the base of said second transistor.