Guide path short detector

Details Guide path short detector Guide path short detector

1989-05-08

1990-12-04

Goldstein, Herbert

Communications: electrical

Condition responsive indicating system

Specific condition

324556, 36442402, G08B 2100

Patent

active

049756850

ABSTRACT:
To detect a short circuit condition between guide paths embedded in the floor for automatic guided vehicles, a detection relay has a pair of current transformers having primary windings connected into a guide path circuit at points on the source and the return side of the circuit, the transformer secondary windings being connected in opposition to yield a null signal when there is no short and a finite signal when primary current inequalities are present. Amplifier circuitry discriminates between null and finite signals and controls a relay which activates an annunciator.

REFERENCES:
patent: 1255668 (1918-02-01), Thurber
patent: 3639810 (1972-02-01), Schleif
patent: 3669207 (1972-06-01), Fellgett et al.
patent: 3693081 (1972-09-01), Aviander
patent: 3870952 (1975-03-01), Sibley
patent: 4117463 (1978-09-01), Norton

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