Title: Condition-responsive spring driven actuator

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.

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Inventors: Pettit, Marshall G. (San Jose, CA, US)

Application Number: 631884
Filing Date: 1975-11-14
Publication_date: 1977-09-20
Assignee:
Primary Class(es): 337/408 137/68.13, 251/74, 337/416
Other Classes:
US Patent Ref:

748240	Dec, 1903	Wall	337/409.
3771551	Nov, 1973	John	251/11.
3779262	Dec, 1973	Manning et al.	200/61.
3888271	Jun, 1975	Pettit	137/68.

Other Refs:
Primary Examiner: Beha, Jr., William H.
Assistant Examiner:
Attorney: Huebner & Worrel