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Page:Popular Science Monthly Volume 57.djvu/499

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advantage derived from applying the power to the front wheels, namely, the ability to turn round in a small space.

Another design for driving the front wheels which allows them to swing round independent pivots, is shown in Fig. 14, which is a coupé made by Krieger in France. The power is supplied by two motors, one being mounted on each swivel point. The construction can be understood by considering that in the lower part of Fig. 13 the motor would be secured to a suitable support at the end of the frame L, being held in such a position that the shaft would replace pivot D and a pinion mounted thereon would gear into wheel E. What the advantage of this construction may be, the writer is not able to point out; it certainly

PSM V57 D499 Jennatzy dog phaeton.png
Fig. 15. Jenatzy Dog-Phaeton.

shows, however, that there are many ways in which the object sought may be acomplished.

American manufacturers of electric vehicles, at least the great majority of them, resort to spur-gearing to transmit the motion of the motor to the driving wheels, but with the French designers the chain and sprocket appears to be in great favor. Fig. 15 shows a Jenatzy vehicle (French), in which the chain is used. This construction would not be received with favor by Americans, who as a rule desire to have the mechanical part of the apparatus hidden from view as much as possible. In the Jenatzy vehicle two chain gears are used, one on each side of the body, and from the engineering point of view this is the most desirable arrangement, as with it the driving wheels are independently operated and a compensating gear need not be placed upon