. Automotive industries . Pole-trailet nt work in lumber business. Shows similarity to semi-trailer type, but towing connection between the units in by adjustablepole, and load rests on swiveled bolsters and is closely held betweenlaterally adjustable chocks and stakes forming parts of the bolsters [Upper left) To make the fifth-wheel device couple automatically, atype has been developed in which the lower disk has a gate ivith con-verging edges and spring actuated locking jaws which close aroundthe kingbolt in an annular groove when motor and trailer units arebrought together. (Lower left) In
. Automotive industries . Pole-trailet nt work in lumber business. Shows similarity to semi-trailer type, but towing connection between the units in by adjustablepole, and load rests on swiveled bolsters and is closely held betweenlaterally adjustable chocks and stakes forming parts of the bolsters [Upper left) To make the fifth-wheel device couple automatically, atype has been developed in which the lower disk has a gate ivith con-verging edges and spring actuated locking jaws which close aroundthe kingbolt in an annular groove when motor and trailer units arebrought together. (Lower left) In semi-trailer equipment the fiftlv-wheel coupling is paramount, as it must transmit the traction pull,must cushion starting and stopping actions, steer the trailer and per-mit the latter varying relations to the motor unit. The top disk isbolted to the underside of the trailer body or frame and carries thekingbolt which couples the upper and lower disks, so as to maintaincontinuous contact between them and avoid wobbling.
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Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
