Group recorder alarm

Details Group recorder alarm Group recorder alarm

1974-12-04

1976-04-20

Wilbur, Maynard R.

Communications: electrical

Selective

Having electron beam device

340283, 340421, 346 33C, G01V 124, G01V 122

Patent

active

039522830

ABSTRACT:
This invention concerns a status alarm for a seismometer group recorder. In using group recorders, the automatic recording feature leaves the field personnel (the user) with minimum confidence that operations are satisfactory, in the absence of a status alarm. An alarm functions when a particular group recorder has been energized and is presumptively ready for operation. The alarm system is actuated only when the major systems within the group recorder are ready to operate. The alarm may be either visual or aural or both.

REFERENCES:
patent: 3316996 (1967-05-01), Ball et al.
patent: 3806864 (1974-04-01), Broding et al.
patent: 3886494 (1975-05-01), Kostelnicek et al.

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