Signal indicating fuse testing apparatus

Details Signal indicating fuse testing apparatus Signal indicating fuse testing apparatus

1981-01-21

1983-05-03

Strecker, Gerard R.

Electricity: measuring and testing

Plural, automatically sequential tests

324 51, 340639, G01R 3102

Patent

active

043822258

ABSTRACT:
An apparatus for testing signal indicating fuses. The apparatus comprises test positions for the acommodation of N fuses, each test position having a common, a normally open (NO), and a normally closed (NC) terminal. When the test positions are filled with N functional fuses, the fuses are, in effect, connected in series across a regulated current source. In the event that one of the fuses becomes open, the series circuit is momentarily broken, thereby triggering an associated SCR which in turn lights a lamp indicating which fuse has blown. Shortly afterwards the fuse flag will make contact with its alarm (NO) terminal, thereby reclosing the circuit. The apparatus may include or be coupled to a multichannel event timer in order to indicate the time, as measured from the start of the test, at which individual fuses failed.

REFERENCES:
patent: 3277364 (1966-10-01), Abrahamson
patent: 3440524 (1969-04-01), De Jarld et al
patent: 3611364 (1971-10-01), Jones
patent: 3798540 (1974-03-01), Darden et al.
patent: 3842343 (1974-10-01), Taylor et al.
patent: 3967192 (1976-06-01), Kellog et al.

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