Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1986-12-22
1988-01-26
Levy, Stewart J.
Communications: electrical
Condition responsive indicating system
Specific condition
340605, 73 492, 73 611R, G08B 2100
Patent
active
047219505
ABSTRACT:
There is a plurality of probes electrically connected to a central controller. Each of the probes is capable of providing a hydrocarbon signal, a water signal and a dry signal upon sensing these respective environments. The controller includes an audible alarm transducer and a switch for activating circuitry providing either a first alarm mode which provides an alarm in response to a hydrocarbon signal or a second alarm mode which provides an alarm in response to a hydrocarbon signal and also a water signal. A continuous alarm tone is provided upon receiving a hydrocarbon signal while an intermittent alarm tone is provided upon receiving a water signal. A yellow label links a "water" sign and the transducer and a red label links an "oil" sign and the transducer. The yellow label encircles only a small portion of the transducer and the red label encircles the major portion of the transducer so as to provide a visual indication that the shorter, intermittent tone indicates water while the longer, continuous tone indicates hydrocarbon.
REFERENCES:
patent: 3693110 (1972-09-01), Briggs, Jr. et al.
patent: 3978468 (1976-08-01), Bond et al.
patent: 4088985 (1978-05-01), Saito et al.
patent: 4090193 (1978-05-01), Hinkle, Jr.
patent: 4580033 (1986-04-01), Andrejasich
patent: 4644354 (1987-02-01), Kidd
patent: 4646069 (1987-02-01), Andrejasich et al.
Andrejasich Raymond J.
Jefferson Ford C.
Kidd Roy F.
Emhart Industries Inc.
Forest Carl A.
Levy Stewart J.
Williams Hezron E.
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