An Interesting Motor Bicycle
MR. A. W. WALL, of Guildford, has made a motor bicycle from his own designs which presents some original features. It will be noticed that the machine is of great length, the frame being not only very long, but very low, this last result being partly obtained by setting the top tube almost in a line with the bottom of the head.
The top of the head is stayed by a curved strut. Careful inspection of the illustration will reveal the fact that the horizontal stay member is clipped on. This is done with the object of providing a ready means for fixing the tanks, which are grooved top and bottom to receive the frame members. The tanks are put in position, with the upper grooves engaging the top tube, and then the detachable stay, which is built up of D-section tubes arranged face to face, is pushed up into the grooves on the undersides of the tanks, and is clipped on.
A 2¾ h.p. motor of a well-known pattern is employed, and no pedalling gear is fitted. The large belt pulley, however, is mounted on a very ingenious clutch. This clutch is of the double conical type, one part being on the pulley, and the other on the hub of the road wheel. A transverse key working in a cross slot in the hollow wheel axle controls the part of the clutch carrying the pulley, and this key is operated by a pin passing through the axle. At the outer end the pin is connected up to a hand lever, which will be noticed running up by the saddle stay. The end of the lever is fulcrumed just below the wheel axle, so that the rider can control the clutch to a nicety. Magneto ignition, spray carburetter, and belt drive are employed. Both the saddle and the handles are carried very far back, and we can quite believe that the machine is a flier.
The Motor Cycle, April 15th 1903.
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