| 摘要 |
A multidirectional sensor having an operator slidably mounted within a guide tube and resiliently biased toward actuated position. A plurality of balls are located within apertures in the tube and engage opposed radial shoulders of the operator and of an escapement to retain the operator against movement. The escapement is slidably mounted on the tube and resiliently biased into engagement with the balls to locate the escapement in a predetermined position. The resilient bias on the escapement is opposite that exerted on the operator. A seismic mass is seated on a support and surrounds the guide tube. The mass is resiliently located in a predetermined position wherein its longitudinal axis is coaxial to or aligned with the axis of the operator and guide tube. An acceleration pulse of predetermined amplitude and time moves the seismic mass to a position where its axis is out of alignment with that of the operator and tube and the mass engages the escapement to move the escapement axially of the guide tube and permit the balls to move radially out of engagement with the opposed radial shoulders to release the operator.
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