Method and apparatus for testing telephone coin relays

Details Method and apparatus for testing telephone coin relays Method and apparatus for testing telephone coin relays

1987-06-16

1988-10-11

Schreyer, Stafford D.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Of data transmission

379 21, 324260, H04M 124, H04M 1700

Patent

active

047776447

ABSTRACT:
A portable tester determines an operating condition of coin relays by sensing a duration of a time period between flux conditions generated thereby. The device does not require electrical circuit connection to the relay and is thus a non-invasive testing apparatus. An annunciator provides audible and visual indications to service personnel to indicate whether the detected duration is too short, requiring one form of adjustment, too long, requiring a second form of adjustment, or within a specified range therefor, requiring no adjustment.

REFERENCES:
patent: 3496300 (1970-02-01), Stokes
patent: 4582965 (1986-04-01), Lembke

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