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A rotary prime mover, preferably an electric motor, is remotely operable from the cab of the vehicle. A linkage couples the rotary prime mover to the pins of the slider assembly, wherein rotation of the rotary prime mover selectively moves the pin in and out registry with holes in a pair of rails on

A rotary prime mover, preferably an electric motor, is remotely operable from the cab of the vehicle. A linkage couples the rotary prime mover to the pins of the slider assembly, wherein rotation of the rotary prime mover selectively moves the pin in and out registry with holes in a pair of rails on the trailer to prevent and permit relative movement between the rear tandem axle assembly and the trailer. A pin sensor is coupled to the linkage to detect whether the pins are in or out of registry with the holes in the rails and a counter is coupled between the rear tandem axle assembly and the trailer to determine with which of the holes in the rails the pins are aligned. A visual display is provided in the cab and coupled to the pin sensor and counter to communicate to the operator the registry of the pins and with which of the holes the pins are aligned. The visual display in the cab includes visible, lighted indications of whether the pins are in or out of registry with the holes in the rails and whether pins are bound in the holes. The visual display also includes a numerical counter to inform the operator with which of the holes the pins are aligned. The visual display also includes audible and visual warnings to alert the operator if the slider release assembly is in one of several unsafe conditions.

대표청구항 ▼

[ We claim:] [1.] A counter for use in varying the wheel base of a vehicle having a selectively movable portion coupled thereto and for indicating the position of the movable portion relative to the vehicle, the counter comprising:an elongate housing adapted to be carried by one of the vehicle and t

[ We claim:] [1.] A counter for use in varying the wheel base of a vehicle having a selectively movable portion coupled thereto and for indicating the position of the movable portion relative to the vehicle, the counter comprising:an elongate housing adapted to be carried by one of the vehicle and the movable portion;an electrical conductor disposed in the elongate housing;a plurality of magnetic sensors electrically coupled to the conductor at positions corresponding to locations of the movable portion;a plurality of resistors coupled in parallel to the electrical conductor and between the magnetic sensors, each resistor having a resistance different from that of the other resistors;a magnet adapted to be carried by another of the vehicle and movable portion and in proximity to the elongate housing, wherein relative movement between the vehicle and the movable portion aligns the magnet with one of the plurality of magnetic sensors, thereby closing an electrical circuit through the magnetic sensor, the resistor, and the electrical conductor, the circuit having a signal characteristic indicative of the position of the movable portion relative to the vehicle.