72 



TRANSPORTATION ON LAND BY VEHICLES:-THE VEHICLES 



Heisler locomotive :- The two cylinders are right and left handed; they stand in a plane vertical to the 

 track, and are inclined against the horizon by 45 degrees. The pitmans work on the crank of a cen- 

 tral, longitudinal driving shaft, 

 which extends from the fore- 

 axle of the four-wheel front 

 truck to the rear- axle of the 

 four-wheel rear truck causing 

 these axles to revolve by oil- 

 submerged gears and pinions. 

 The four drivers of each truck 

 are connected by side rods 

 outside. The journals are 

 inside the wheels. The trucks 

 are swiveled in the main 

 frame so as to be able to 

 pass sharp curves on un- 

 even track. Frame, boilers, 

 and engines are of a parti- 

 cularly simple and strong 

 design. All parts are _ • 



readily accessible. Each 

 truck can be removed easily 

 and completely. The side rod 

 comes in good stead when the 

 locomotive is jacked up after being 

 derailed. The price of the Heisler ranges 

 from jylSO to i!-200 per ton of weight. 



\ \ ^,11 -~.^i^>^^^^^^'. a 



Gear arrangement of Heisler geared locomotive. 

 Heisler Locomotive Works, Erie, Pa. 



Drive shaft of Heisler geared locomotive seen from above, and seen from the side. Heisler Locomotive Works, Erie, Pa. 



115 Crank shaft 



116 Crank counter balance 



117 Crank counter - balance 



straps 



118 Center shaft, front 



119 Center shaft, rear 



120 Coupling, slip joint, 



male 



121 Coupling, slip joint, 



female 



122 Coupling, clamp joint 



123 Coupling cross 



12-4 Coupling bushings 



125 Coupling bolls, short 



126 Coupling bolts, long 



127 Coupling bolls, slip-joint 



