| 摘要 |
A sensor for use in an in-floor truck-towing conveyor switching mechanism, the sensor utilizing two cooperating jaws which together are engaged by a selector pin pulled between the jaws by the truck on which it is mounted. One of the jaws is fixed and the other is pivoted for movement toward and away from the fixed jaw under the influence of the pin. Pivotal movement of the movable jaw causes a cable connected to the switch plate or responder to be pulled, actuating the responder so as to switch the truck to a spur or branch track. The jaws of the sensor are biased to project above the floor. Both of the jaws are horizontally pivotable so as to depress under the floor when engaged by an object other than the selector pin, such as a vehicle wheel, thereby preventing accidental actuation of the responder.
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