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Whittle patent infinitely variable gear, with variation of 6 to 1

Whittle patent infinitely variable gear

1929
Hele-Shaw pump for power transmission, gear pump-body and valve sectioned, gunmetal casing, size P2.25. By the Hydraulic Gears Company, London, W6, England, 1914-1924.

Hele-Shaw pump for power transmission

1914-1924
Experimental variable speed gear patented by George Thomas in 1906

Experimental variable speed gear patented by George Thomas in 1906

1906-1912
1/4 H.P infinitely variable speed gear unit type RA no.263

1/4 H.P infinitely variable speed gear unit

1931
2 Hayes automatic variable-speed gearboxes

2 Hayes automatic variable-speed gearboxes

1950-1960
'Williams-Janney' hydraulic variable speed gear no.95, size 5, type C, with gun/metal hand wheel, by The Variable Speed Gear Co., London, SW1, England, 1914-1924.

'Williams-Janney' hydraulic variable speed gear no.95

1914-1924