Fuse status indicator system

Details Fuse status indicator system Fuse status indicator system

1984-09-04

1987-04-07

Buczinski, Stephen C.

Communications: electrical

Condition responsive indicating system

Specific condition

340638, 337241, 337376, G08B 2100

Patent

active

H00002488

ABSTRACT:
An on-line indicator connected to each fuse of an electrical circuit includes an LED which becomes illuminated if its protected fuse blows. Groups of these on-line indicators can be connected via an OR gate to a single master fuse status indicator which also includes an LED which becomes illuminated if any of the on-line indicators connected thereto has its LED illuminated. The circuitry can accommodate power supplies of different voltages of either polarity. Opto-isolators can be used to reduce stand-by current drain and to isolate the on-line indicators from each other.

REFERENCES:
patent: 2726378 (1955-12-01), Norcross
patent: 3546692 (1970-12-01), Salzer
patent: 3643247 (1972-02-01), Ratcliffe
patent: 4498077 (1985-02-01), Richardson
IBM Technical Disclosure Bulletin, vol. 13, No. 1, Jun. 1970; "Blown Fuse nsor" by H. E. Lower; pp. 59 & 60.
Practical Electronics, vol. 12, No. 7, Jul. 1976; "Fuse Failure Warning" by N. Ruiz; p. 593.
IBM Technical Disclosure Bulletin, vol. 13, No. 3, Aug. 1970; "Circuit Condition Indication" by E. B. Carey et al.; p. 680.

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