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Single helical spiral bevel wheel and pinion

Single helical spiral bevel wheel and pinion

circa 1922

Five cast gear wheels

Five cast gear wheels

Smaller pinion

Smaller pinion

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

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

Citroen double herringbone spur wheel

1922

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

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

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

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

1926