Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1983-03-23
1986-05-27
Rowland, James L.
Communications: electrical
Condition responsive indicating system
Specific condition
200 6105, 141198, G08B 2100
Patent
active
045918384
ABSTRACT:
A spillage detector device for use in conjunction with fractionation of liquid chromatography systems which includes a spillage receiving enclosure (34) beneath the fractionation area. A sensing device (36) having a plurality of electrodes (46) of alternating polarity is mounted within the spillage receiving enclosure (34). Detection circuitry (38), responsive to conductivity between electrodes (46), is operatively connected to the sensing device (36). The detection circuitry (38) feeds into the output circuitry (38). The output circuit has relaying and switching circuitry directed to a solenoid (60), an alarm system (118) and a pump (4). The solenoid (60) is connected to the pliable conduit (22) of the chromatography system. The alarm system comprises an audio alarm (190) and a visual signal (120). A 115-volt power system interconnected with the pump (4), the solenoid (60), the sensing device (36), and the detection and output circuitry (38).
REFERENCES:
patent: 3200388 (1965-08-01), Uhlig
patent: 3770002 (1973-11-01), Brown
patent: 4043906 (1977-08-01), Helmer
patent: 4126857 (1978-11-01), Lancia et al.
patent: 4259985 (1981-04-01), Bergmann
patent: 4380243 (1983-04-01), Braley
Fulton Donald S.
Jarvis Michael R.
Fein Edward K.
Hofsass Jeffery A.
Manning John R.
Matthews Marvin F.
Rowland James L.
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