GB Patent: GB-258,113
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| Improvements in variable speed gearing
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Patentee:
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| Harold Walker Pearn (exact or similar names) - West Gorton, Manchester, England |
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Patent Dates:
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| Applied: |
Oct. 30, 1925 |
| Granted: |
Sep. 16, 1926 |
Espacenet patent
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Jeff Joslin
"Vintage Machinery" entry for Frank Pearn & Co., Ltd.
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Description: |
| "Variable-speed gearing comprises an epicyclic train with a non-variable sun-and-planet chain pair f, and a variable sun-and-planet chain pair h, e. The carrier a of the planets drives, and the shaft g of the sprocket f is driven. The variable chain pair h, e may be of any suitable type, such as the type described in Specification GB-228,838. The wedging action of the chain on the left-hand movable flanges of the expanding chain pulleys e, h shown is balanced upon an intermediately pivoted lever m and control is effected to vary the speed by a lever j. A clutch q, r is provided for connecting a sleeve i carrying the sun gear h to the shaft g for solid high-speed driving. A brake o, p arrests this sleeve while the pair e, h is being varied for reduced forward speeds and reversed driving. This clutch and brake are brought in alternatively by a control lever n." |
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