Electricity: circuit makers and breakers – Special application – Change of inclination or of rate of motion responsive
Patent
1994-09-22
1996-11-12
Brown, Brian W.
Electricity: circuit makers and breakers
Special application
Change of inclination or of rate of motion responsive
H01H 3514
Patent
active
055742661
ABSTRACT:
A deceleration sensor switch (10) comprises electrical contacts (50, 52) and a mass (14) movable between an unactuated position in which the electrical contacts are open and an actuated position in which the electrical contacts are closed. The mass is biased towards the unactuated position. A cylinder (30) includes an end portion (44) and a cylindrical wall portion (34) extending from the end portion to define a chamber (35) inside the cylinder. The end portion includes a metering orifice (36) for allowing air to flow between the chamber and outside the cylinder. A shaft (22) interconnects the mass and a truncated cone (24). The cone has a skirt end (26) and is movable in one direction relative to the chamber to displace air from the chamber through the metering orifice to outside the cylinder upon the mass moving from the unactuated position to the actuated position in response to the mass being subjected to deceleration of at least a predetermined magnitude. The cone is movable in an opposite direction relative to the chamber to cause air from outside the cylinder to flow through the metering orifice into the chamber upon the mass moving from the actuated position back to the unactuated position, thereby enhancing contact closure time of the electrical contacts.
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Brown Brian W.
Friedhofer Michael A.
TRW Technar Inc.
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