. Automotive industries . he second from the pinion (integral with theintermediate gear) to the internal gear on the periphery ofthe road wheel. The mechanism, which is completely en-closed, is grease packed, and operates therefore under fa-vorable lubricating conditions. There is an expandingbrake on the intermediate gear of the drive to each wheel,and braking effort can be exerted on all four wheels. The wheels are 20 in. in diameter and are fitted with5-in. solid rubber tires. These tires are 3 in. deep, thusproviding the same depth of rubber cushion as the solidtires on large-wheel street
. Automotive industries . he second from the pinion (integral with theintermediate gear) to the internal gear on the periphery ofthe road wheel. The mechanism, which is completely en-closed, is grease packed, and operates therefore under fa-vorable lubricating conditions. There is an expandingbrake on the intermediate gear of the drive to each wheel,and braking effort can be exerted on all four wheels. The wheels are 20 in. in diameter and are fitted with5-in. solid rubber tires. These tires are 3 in. deep, thusproviding 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 by 2 in. wide. The wheel units andjack units are packed with grease, so that the lubricationof the transmission gearing is effected bearing points are lubricated from oil 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 reasons for using the chain is thatweaving of the truck frame does not cause binding indrive. The travel of the jacks is controlled from the maximum travel is 91 ■> in. Either an Exide or an Edison battery can be used on thetruck, the Exide being either the 34 cell M. V. 9 or the35 cell M. V. 11 type and the Edison the 59 cell A-4 or is a hinged cover in the truck deck, which permitsof quickly changing the battery if it is desired to use thetruck continuously. Another advantage of the hingedcover is that it permits of easy inspection of the charging receptacle of the Anderson type is provided,and there is an extra charging receptacle at t
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectaeronautics, bookyear
