Patent Model - Improvement in Automatic Stop-Motions for Steam Engines
Maker and role
John Jackman Jr. (b.1825, d.1896), Patentee
The American Automatic Stop Motion Company, Assignee
Production date
Apr 18 1865
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Object detail
Media/Materials
Wood, brass, iron
Measurements
6 3/4 x 4 1/4 x 2" (17.1 x 10.8 x 5.1cm)
Description
Jackman's patent "consists in a spring and suitable stop, applied in combination with the governor-shaft, and with arms mounted on a bar, which can turn in its bearings, and which, when it turns, causes said arms to come in contact with the catch-bars and to liberate the same from the plus of the levers, shoes, or other equivalent parts, acting on the valve in such a manner that when the arms are turned to such a position in which they do not interfere with the action of the catch-bars, the spring is wound up on the rod and retained in this position by the stop, and the engine is allowed to run in its regular manner..." (Patent number 47,359)
Collection
Object number
2015.14.518a,b
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