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John Webster
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25,713. Webster, J. Nov. 28. Tyres, pneumatic. -The tread of the tyre is formed with three circumferential ribs B, which are separated by semicircular grooves and are joined by oblique ribs A which extend along the tread in a chain of rhombuses, the ridges of the ribs A, B, which are bevelled off from their centres, lying in a convex surface. The angles of the spaces C formed between the ridges may be rounded off.
GB190825713D1908-11-281908-11-28Improvements in Outer Covers of "Non Skid" Pneumatic Tyres
ExpiredGB190825713A
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