Power plants – Motor operated by expansion and/or contraction of a unit of... – Mass is a solid
Patent
1980-05-15
1982-08-31
Spar, Robert J.
Power plants
Motor operated by expansion and/or contraction of a unit of...
Mass is a solid
169 37, 236100, F01B 2910
Patent
active
043465587
ABSTRACT:
A thermally responsive force generating device 10 is disclosed for use in operating fire extinguishing sprinkler valves. The device includes a temperature sensitive locking subassembly 18 mounted in an adapter member 14 which has a threaded portion for connection to a sprinkler valve. A thermal actuator 12 of the expansible wax type is connected to the adapter by a thin walled tubular member 16 which allows the thermal actuator to break away from the adapter if excessive force is generated thereby as a result of experiencing extremely high environmental temperatures. The locking assembly includes a spring biased locking pin 56 mounted in an opening in the adapter and held in an inoperative position by a fusible temperature sensitive insert 54. The insert will remain solid at temperatures below a predetermined value thus permitting an actuator output rod 38 to be moved to a retracted position under certain conditions. If the temperature exceeds the predetermined value the locking pin will be moved beneath a shoulder 42 formed on the output rod, thereby preventing the rod from retracting.
REFERENCES:
patent: 3386065 (1968-05-01), Algino
patent: 4187683 (1980-02-01), Northrop, Jr. et al.
Eaton Corporation
Grace C. H.
Johnston R. A.
Lewis J. G.
Noland Kenneth
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