Continuous continuity monitor for monitoring the continuity of a

Details Continuous continuity monitor for monitoring the continuity of a Continuous continuity monitor for monitoring the continuity of a

1979-05-09

1980-12-23

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

G01R 3102

Patent

active

042413044

ABSTRACT:
A continuous continuity monitor checks the continuity of an electrically insulated wire as the wire is moved axially of itself through the monitor, and provides an appropriate signal whenever a break in a conductor within the wire is detected. The monitor employs two detecting electrodes spaced along the wire and an excitation electrode to which a high frequency voltage is applied. The conductor within the wire is grounded at one side of the detecting electrodes opposite from the excitation electrode to complete a capacitive circuit with the excitation electrode. As the wire is moved past the electrodes, the same excitation voltage is capacitively coupled from the conductor to the two detecting electrodes as long as there is no break in continuity. When a break appears in the conductor between the two detecting electrodes, one of the electrodes closest to the excitation electrode detects the excitation voltage to a greater extent than the other, and disturbs the voltage balance between the two detecting electrodes. The unbalanced voltages are used to trigger an alarm signal or to generate a signal for either marking the insulated wire at the break or terminating continuity testing.

REFERENCES:
patent: 3096478 (1963-07-01), Brown
patent: 3241061 (1966-03-01), Quittner
patent: 3374428 (1968-03-01), Eager et al.
patent: 3418570 (1968-12-01), Clinton
patent: 3555413 (1971-01-01), Matsuba
patent: 3628133 (1971-12-01), Dornberger
patent: 3763426 (1973-10-01), Wilkes
patent: 3919635 (1975-11-01), Bowen et al.
patent: 4056771 (1977-11-01), Clinton et al.

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