Electrical transmission or interconnection systems – Combined impedance and switch systems – Condition responsive switch
Patent
1974-01-07
1976-07-06
Smith, Jr., David
Electrical transmission or interconnection systems
Combined impedance and switch systems
Condition responsive switch
337140, H01H 4702
Patent
active
039683800
ABSTRACT:
The disclosure relates to high gain electrical relays which are operable at very low power levels and which, when arranged in a relay system with impedance matching to an energizing power source, are operable at the low power levels used in energizing integrated circuits. The relays utilize nickel-titanium alloy wires which are conditioned and arranged to display sharp, reversible changes in shape and modulus of elasticity as the wires are heated and cooled through a temperature transition range, the alloy wires being disposed, preferably with impedance matching means between the wires and energizing power sources, to be heated through the noted transition temperature range by directing current from such low power sources through the wires, thereby to initiate relay operation. The relay construction provides unusually high gain so that relay operation from such low power sources is effective for regulating operation of various types of components used in electrical apparatus.
REFERENCES:
patent: 3374337 (1968-03-01), Barley
patent: 3417228 (1968-12-01), Little
patent: 3516082 (1970-06-01), Cooper
patent: 3554680 (1971-01-01), Malavasi
patent: 3665159 (1972-05-01), Becker et al.
patent: 3718924 (1973-02-01), Trybert et al.
patent: 3745308 (1973-07-01), Lefferts
patent: 3752956 (1973-08-01), Cahill et al.
Jost Ernest M.
McBride, Jr. Lyle E.
Santala Teuvo J.
Baumann Russell E.
Haug John A.
McAndrews James P.
Smith Jr. David
Texas Instruments Incorporated
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