g the same depth of rubber cushion as the solidtires on large-wheel street trucks, rather than the lessercushion which is standard for indoor floor purposes. The frame is built up of 4-in. reinforced channel steel,hot riveted. It is supported on the axle by four half ellip-tic springs 26 in. long… … The elevating mechanism consists of four screwjacks driven by a roller chain. There is a spur gear reduc-tion between the motor and the sprocket which operatesthe chain. This sprocket has a mechanical friction slip sothere can be no danger of over-driving the elevating mech-anism. One of the…
Automobiles · Aeronautics
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