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Thomas Hewett
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17,379. Hewett, T. July 23. Chain-wheels for bicycles &c. Two metal discs a of the section shown are united back to back to form a wheel with a trough-shaped rim. Rollers or teeth are mounted in pairs on the rim flanges c, and openings a' may be cut in the discs under these rollers for the escape of dirt &c. The edge of one opening may be turned down over that of the other for fastening as shown in Fig. 5 ; rivets a' may also be used.
GB189717379D1897-07-231897-07-23Improvements in Chain Gearing.
ExpiredGB189717379A
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