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Five cast gear wheels

Five cast gear wheels

Smaller pinion

Smaller pinion

1911

Single helical spiral bevel wheel and pinion

Single helical spiral bevel wheel and pinion

circa 1922

Citroen double herringbone spur wheel (65 teeth) with pinion (13 teeth)

Citroen double herringbone spur wheel

1922

3 x Brass gear wheels, 2 x colletts, 1 x shaped brass bar

Brass gear wheels, colletts, and brass bar

Small pair of laminated staggered tooth gears, mounted for demonstration

Small pair of laminated staggered tooth gears

1912-1926

Three gear wheels cut from laminated phenolic resinoid bonded sheet (fabric base) ( different types)

Three gear wheels of textile bonded laminated phenolic resin

1934

Gear wheel and shaft, 2 pinion shafts and 2 couplings - (turbine reduction gearing ex H.M.S. "Badger")

Gear wheel and shaft

1911

Photograph: Clepsydra with gears, by Ctesibius, c. 250 B.C reproduced from 'Hydraulics and Mechanics' by Thos. Ewbank.

Photograph: Clepsydra with gears

Parts from Spelsbury Water Mill : Axle end with bevel wheel, iron shaft with bevel pinion; pulley (incomplete); 3 beams with journal bearing

Components from Spelsbury Water Mill

1790-1820

D.B.S. 5" single reducing helical gear with cover,

D.B.S. 5" single reducing helical gear with cover

1926