Geometrical instruments
Patent
1979-06-21
1981-10-20
McQuade, John
Geometrical instruments
339182RS, 339183, H01R 1500
Patent
active
042956943
ABSTRACT:
An electrical plug is described that mates with existing standard electrical jacks to intercept the electrical signal making it available for controlling the off/on condition or volume of the output transducer of the electrical device or for monitoring or measuring the signal without interruption of the operation of the device.
REFERENCES:
patent: 1251618 (1918-01-01), Bahls et al.
patent: 1834184 (1931-12-01), Schramm
patent: 2530415 (1950-11-01), Wilson
patent: 3419684 (1968-12-01), Lord et al.
patent: 3826986 (1974-07-01), Brown et al.
patent: 4037319 (1977-07-01), Maloof
patent: 4110696 (1978-08-01), Meeks
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