Electrical conductor and short circuit locator

Details Electrical conductor and short circuit locator Electrical conductor and short circuit locator

1977-05-02

1978-12-12

Strecker, Gerard R.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 66, G01R 3108, G01R 3102

Patent

active

041298250

ABSTRACT:
An apparatus for locating electrical conductors and short circuits in AC and DC circuits is disclosed herein. The apparatus has leads for connecting across open circuit breaker or fuse box terminals. Current limiting resistors and transistors limit the current, if AC or converted to pulsated DC, to a value that is sufficiently high to be read on a clamp-on ammeter at any point in the circuit being tested. A first pulse generator intermittently interrupts the current through the current limiting means to create a momentary pulse of approximately 1/2 to 1 second duration at a frequency of approximately 3 to 5 seconds. A second pulse generator interrupts the current limiting means at approximately 225 cycles per second to provide a pulsating component in the momentary pulse for DC circuits. A clamp-on ammeter will indicate this pulse at all points in the circuit except at the short circuit, whether in a DC or AC circuit.

REFERENCES:
patent: 2127216 (1938-08-01), Hallden et al.
patent: 2176755 (1939-10-01), Borden
patent: 2176757 (1939-10-01), Borden
patent: 2641633 (1953-06-01), Hosford
patent: 3621384 (1971-11-01), Yamada
patent: 3699433 (1972-10-01), Smith
patent: 3829765 (1974-08-01), Siler
patent: 3991363 (1976-11-01), Lathrop

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