112 



COMBINED PORTABLE ENGINE 



which the cables wind, after passing over the horizontal 

 pulleys keyed under the frame A (in the Figure, a is the 

 traction, and x the return cable). The displacement of the 

 machine in the direction of arrow 1 is effected by the cable 

 C C', which is coiled two or three times round the surging 

 drum, and held taut by the engine-driver; the other ex- 

 tremity of the cable being anchored at a certain distance, 

 the whole system may be moved towards it. The displace- 

 ment may also be effected by means of levers n inserted in 

 holes in the rim of the rollers. 



In the Hidien system (patented November, 1897) instead 

 of mounting the engine on the frame of the winding drum, 

 the latter H (Figs. 70 and 71) is put in the place of the 



Fig. 70. Hidien's Winding Drum. 



forecarriage of the engine M, the motive power being* 

 transmitted by the belting n to the intermediate shaft, upon 

 which a double bevel-wheel and pinion are fixed, the large 

 wheel of which 

 revolves at the 

 same time both 

 the traction drum 

 A and the return 

 drum R, the large 

 drum revolving 

 round a vertical 

 spindle to facili- 

 tate winding ; the 

 whole system 

 travels on rolled 

 joist girders. 



Fig. 71. Diagram of Hidien's Steam Winding Drum. 



