Passive inductive switch

Details Passive inductive switch Passive inductive switch

2007-02-27

2007-02-27

Vortman, Anatoly (Department: 2835)

Electrical transmission or interconnection systems

Switching systems

Switch actuation

C102S426000, C102S427000

Reexamination Certificate

active

10715310

ABSTRACT:
A passive inductive switch for coupling a battery to a load in a remotely deployed battery-powered electronic device. The switch operates in response to a transmitted magnetic field at a particular frequency. The switch includes an antenna for transforming the magnetic field into an induced voltage and a voltage detector for sensing the induced voltage and triggering a switching element. The switch operates in a standby mode until a sufficient voltage is induced in the antenna which causes the switch to couple the battery to the load. In the standby mode the switch draws a negligible amount of power, which permits the device to be deployed in the field for long periods of time without expending significant battery power.

REFERENCES:
patent: 3621290 (1971-11-01), Fryer
patent: 3884170 (1975-05-01), Jensen
patent: 4685396 (1987-08-01), Birse et al.
patent: 5621412 (1997-04-01), Sharpe et al.
patent: 6011439 (2000-01-01), Colarossi et al.
patent: 6236333 (2001-05-01), King
patent: 6253679 (2001-07-01), Woodall et al.

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