112 



BULLETIN 119, U. S, NATIONAL MUSEUM. 



mission housing. These gears are inclosed in a housing placed over 

 the transmission housing. Through this set of gears power is thus 

 transmitted through a driving-gear shaft connected by a universal 

 joint to the power-hoist universal drive shaft. The lifting mecha- 

 nism, inclosed in a casing, is carried on a steel subf rame placed to the 

 rear of the transmission housing. The power-hoist universal drive 

 shaft is connected by a universal joint to a worm shaft on which a 

 worm is keyed. The worm drives a worm gear placed beneath it 

 and mounted on a shaft, on the farther end of which is a pinion. 

 This pinion meshes with an intermediate shaft gear. Mounted on 

 the same shaft as the latter gear is the crank-shaft drive pinion, and 

 power is delivered through it to a large ring gear. This ring gear is 



AUTOMOBILE TRUCK WITH TILTING BODY, 1921. 



bolted on the ring-gear hub, which is carried on the crank shaft, the 

 ends of which are splined, and the body lifting cranks fit over 

 the ends. The body-lifting cranks and the body-lifting links are con- 

 nected by a crank pin. The links are hinged to the body angle sills 

 by means of link brackets and link pins. When power is applied 

 through this set of gears, the body-lifting cranks are made to rotate, 

 and when the cranks and links are straightened out fully the 

 body has attained an angle of 40 degrees. Shift gears are also pro- 

 vided in this mechanism, so that a reverse motion is obtained in order 

 that the body may be raised part way up and then, by means of 

 changing the location of control lever, lowered to the frame. Hoist- 

 ing of the body may be accomplished by rotating the crank arms in 

 either direction. The body-lifting link brackets are fitted with bush- 

 ings, whose diameter is about f^r of an inch larger than that of the 



