Patent Model - Improvement in Indicators for Pressure-Gages
Maker and role
James Treat, Patentee
Production date
Mar 26 1878
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Object detail
Media/Materials
Wood, brass, glass
Measurements
8 3/4 x 6 x 6" (22.2 x 15.2 x 15.2cm)
Description
Treat's patent "relates to improvements in indicators for steam, water, pressure, and vacuum gages, consisting in the combination, with any of the ordinary mechanism generally employed in such gages, of a stationary and a movable helix-shaped disk, of strongly-contrasting color, the latter disk being secured to the pinion-shaft, to which ordinarily the finger or pointer is attached." (Patent Number 201,637)
Collection
Object number
2015.14.2557a,b
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