| 摘要 |
A system adapted to be mounted on a pickup truck for warning the driver of the truck should the front section of a fifth wheel trailer pivotally supported on a hitch secured in the bed of the truck approach a point where there is imminent danger of impact between the front section of the trailer and the back of the cab as the truck and trailer are executing a turn. The system comprises a warning device which is to be placed in the cab of the truck and alarm units mounted on the front wall of the truck bed, each such alarm unit having a contact member which is movable in response to contact with the front section of the trailer to operate a switch and activate the warning device to warn the driver that the radius of a turn then being performed must be increased to avoid an impact between the front section of the trailer and the back of the cab.
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