Catalyst flow alarm

Details Catalyst flow alarm Catalyst flow alarm

1996-12-31

1998-07-14

Swarthout, Brent A.

Communications: electrical

Condition responsive indicating system

Specific condition

340611, 340614, 340618, 340626, 137554, 137557, G08B 2100

Patent

active

057811164

ABSTRACT:
A flow alarm includes a magnetic switch that is maintained open so long as catalyst flow is maintained and an air flow switch that is closed responsive to flow of air through an associated conduit. The associated conduit supplies air via a solenoid valve to a pneumatic whistle. When flow of catalyst falls below a pre-set threshhold, the magnetic switch closes completing the circuit with the solenoid valve causing the solenoid valve to open and allowing air flow to the pneumatic whistle to signal the reduction of catalyst flow.

REFERENCES:
patent: 3429291 (1969-02-01), Hoffman
patent: 3445174 (1969-05-01), Matthews
patent: 4087230 (1978-05-01), Matthews
patent: 4130745 (1978-12-01), Hetzer
patent: 4465095 (1984-08-01), Lindberg
patent: 4603707 (1986-08-01), Gregoire et al.
patent: 4747364 (1988-05-01), Horowitz
patent: 4792113 (1988-12-01), Eidsmore

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