Inductively coupled lock

Details Inductively coupled lock Inductively coupled lock

1975-06-11

1976-09-07

Envall, Jr., R. N.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318162, 340274C, 70277, E05B 4706

Patent

active

039796477

ABSTRACT:
An inductively coupled electronic lock system wherein the key has a clock driven variable pulse width generator with alterable pulse sequence input to an inductor. The lock part of the system has an inductive pick-up which discriminates against all but a preselected sequence of pulses, converts the received signals to DC and powers a motor to open the lock.

REFERENCES:
patent: 3344629 (1967-10-01), Burney
patent: 3353383 (1967-11-01), Fish

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