Condition-responsive spring driven actuator

Details Condition-responsive spring driven actuator Condition-responsive spring driven actuator

1975-11-14

1977-09-20

Beha, Jr., William H.

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With fusible, combustible or explosive material

137 68A, 251 74, 337416, F16K 1736

Patent

active

040500470

ABSTRACT:
A condition-responsive, spring driven actuator characterized by a housing having disposed therein an actuator shaft supported for axial reciprocation, a helical compression spring seated in the housing and connected with the shaft for urging the shaft in displacement in a first direction along an axial path, a displaceable lever arm supported near its midportion by a fulcrum and having one end attached to the shaft for restraining the shaft against axial displacement, and a frangible bar disposed in transverse engagement with the arm securing the arm against pivotal motion, and means for separating the bar including, alternatively or concurrently, a pendulous mass concentrically related to the bar, a fusible link interposed in interconnecting relation between the opposite end portions of the bar and a pyrotechnic charge embedded in the bar and connected with an electrical circuit.

REFERENCES:
patent: 748240 (1903-12-01), Wall
patent: 3771551 (1973-11-01), John
patent: 3779262 (1973-12-01), Manning et al.
patent: 3888271 (1975-06-01), Pettit

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