Page 8 Advertisements Column 5

Dominion, Volume 9, Issue 2753, 24 April 1916, Page 8

Attention has been- called by a British motorist to an entirely neglected feature of light car construction. When the wheel of a light car, cycle car, or motor-cycle is revolving 370 to ,400 times a minute —-as at road .speeds of 80-32 miles an hour—the rim of each Wheel is "travelling at what steam engineers call "high speed." At this speed the weight of the tire valve is quite appreciable, and • makes itself known m exoessive vibration of tho wheel. In order to counteract this effect tho motorist placed a lead strip of the : same weight as the valve on the rim exactly opposite the valve position. The result was highly satisfactory, for alt vibration stopped. Where the wheels are of wood a couple of screws can be 'inserted instead of the lead strip, or copper rivets in wire wheels. On the other hand, a motorist who fitted a special valve bolt of greater weight to his cycle car, became greatly Worried when the whole car developed excessive vibration, due solely, to the extra "out of balance" weight. . , patents! I DESIGNS and TRADE MARKS OB- IS |. TAINED in all Countries. Pj I HIGQS&O'DONNELL I I International Patent Attornoys and IS | Consulting Engineers, w 1 11 GBEY STREET. WELLINGTON. | 9 Inventors advised upon all matters p •il rotating to ■ Patents. Mechanical gQ JJ Drawings made by 'export, draughts- JJ