Capacitively coupled machine tool safety system

Details Capacitively coupled machine tool safety system Capacitively coupled machine tool safety system

1982-02-02

1985-07-30

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

192130, 340539, 340540, 340573, 340180, 361182, 361187, G08B 2100

Patent

active

045325014

ABSTRACT:
A safety system for a machine tool is characterized by a capacitively coupled electric field generator (transmitter) and a capacitive receptor antenna. An electrical signal is induced in the capacitive receptor antenna by the action of the electric field. The magnitude of the induced signal is monotonically related to the distance between the electric field generator and the capacitive receptor antenna. When the magnitude of the electrical signal exceeds a predetermined threshold, a machine tool safety indicator is developed.

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patent: 4057805 (1977-11-01), Dowling
patent: 4075961 (1978-02-01), Harris
patent: 4095214 (1978-06-01), Minasy

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