Popular Science Monthly 



363 



A new compartment motor- 

 truck with its hydraulic cylinder 

 directly back of the driver's seat 



A New Type of Motor-Truck 

 for Coal Delivery 



ONE of the newest types of mo- 

 tor-trucks has its hydrauHc 

 cyHnder directly behind the driver's 

 seat, within the body itself. An- 

 other important feature is that when 

 elevated the body is compelled to 

 remain in a position parallel to the 

 truck frame, even with one end empty 

 and the other loaded. 



The body is straight-sided and divided 

 into three or more compartments, each 

 with a cone-shaped bottom provided 

 with sliding doors. The body telescopes 

 within a steel framework mounted on 

 the truck frame, and when down the 

 body is flush with the top of the frame- 

 work. When it is forced up by means of 

 the hydraulic cylinder in the center, it 

 is kept parallel to the 

 truck frame by means 

 of eight racks, two at 

 each corner, which 

 mesh with eight rack- 

 pinions on four shafts 

 on top of the frame- 

 work. 



The bolts which hold the wheel to the rear fork stem -ends 

 fit on a pair of collars on which the power plant is pivoted 



Another Addition to the Motor- 

 Bicycle Family 



THE latest development in the mo- 

 tor-bicycle is the perfection of a 

 motor-wheel which may be attached 

 to any bicycle, whether it be a man's, a 

 woman's or a juvenile model. The 

 attachment consists of a hea\y twenty- 

 six-inch bicycle wheel incorporating a 

 two-horsepower plant and fitted with a 

 substantial mudguard designed to fit 

 into the forks of any bicycle after the 

 original wheel has been removed. 



Although the wheel has a motor which 

 has power enough to climb the steepest 

 grades, the weight and vibration are 

 taken up not by the bicycle itself but 

 by the specially constructed wheel. The 

 bicycle is really converted into a spring- 

 frame machine. The motor is placed 

 on the left side of the 

 wheel in such a manner 

 that it comes outside 

 the rear fork stay of the 

 bicycle when the wheel 

 is in position. The 

 crankshaft extends 

 straight through the hub 

 of the wheel and is 

 mounted on the other 

 extremity. A high- 

 tension magneto is built 

 into the flywheel. The 

 position of the crank- 

 shaft is the novel feature 

 of the device. 



