Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Frequency of cyclic current or voltage
Patent
1977-12-01
1980-05-13
Tokar, Michael J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Frequency of cyclic current or voltage
324133, G01R 3102
Patent
active
042030668
ABSTRACT:
A patching module having an improved switching and monitor feature for use in a patch unit assembly. The monitor feature includes a monitor plug with monitor elements capable of directly monitoring selected leads of the circuit within the module without drawing any power from such circuit. Each module is provided with appropriate connections for an independent power source.
REFERENCES:
patent: 3217244 (1965-11-01), Glover
patent: 3430135 (1969-02-01), Mullen
patent: 4020414 (1977-04-01), Paredes
Magnetic Controls Company
Tokar Michael J.
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