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John Knowles
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5572. Knowles, J. March 12. Indicating amount of opening of valves and cocks. - The spindle of the cutoff valve in a rotary engine carries a pinion 46. The latter is rotated as required by a rack 53, which carries a pointer 54, thereby indicating on a graduated scale 52 the position of the valve.
GB190805572D1908-03-121908-03-12Improvements in Cut-off Valved Rotary Engines.
ExpiredGB190805572A
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