| 摘要 |
A freely suspended prestressed spring is employed in conjunction with a pair of inertial masses to sense rotational velocity by means of centrifugal force. The switch is so mounted that the center of rotation of the spring-mass combination is located midway between the inertial masses, which move in opposite directions when the switch reaches a rotational velocity in excess of a threshold value. This movement causes an expansion of the tension spring which, in the absence of such overcoming force, pulls the masses toward one another. The inertial masses and prestressed spring are of electrically conducting material to electrically connect a pair of switch terminals contacted by the masses when a predetermined rotational velocity is reached.
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