| 摘要 |
A Pressure Sensitive Alarm Component is provided and includes a pressure plate and a base plate. Within the base plate are the pressure plate truss assemblies, the weight transfer assembly, and the sliding switch assembly. The weight transfer assembly includes a load transfer arm which moves back and forth as weight is placed on or removed from the pressure plate and a dial to adjust the position of the load transfer arm. The sliding switch assembly includes a sliding contact support arm which is rigidly linked to the load transfer arm. The sliding switch assembly further includes a plurality of stationary contacts incorporated into a base plate, and two sliding contacts mounted on the sliding contact support arm. The sliding contacts may move along the stationary contacts and open and close the control circuit as they come in out of contact with different pairs of stationary contacts. Once an object is place on the pressure, if the sliding contacts are not in contact with a pair of stationary contacts, the sliding contacts may be repositioned to bring them into contact with a pair of stationary contacts by turning the dial to move the load transfer arm and the sliding contact support arm. Once contact is made, an LED will light up and the alarm may be activated. If the object is thereafter removed, the alarm will sound.
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