Patent Model - Improvement in Valve-Gears

Maker and role
John Giles, Patentee
Production date
May 30 1876
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Object detail

Wood, brass, steel
2 x 6 1/2 x 2" (5.1 x 16.5 x 5.1cm)
Giles' improvement has the following description: "The crank-pin which works the valve is carried in a block in a slotted disk which slides along the disk for shifting the valves, and to the opposite side of the axis for reversing, and is worked by a sleeve on the shaft of the disk to which the shifting-lever is connected. The disk is geared by a toothed rim with a wheel on the crank shaft, which gears will in practice be eccentric, by which the irregularities of the crank will be overcome..." (Patent Number 178,054)
Object number
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