Patent Model - Improvement in Steam-Gages

Maker and role
Charles Barnes, Patentee
Production date
Sep 19 1865
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Object detail

Iron, brass
9 1/4 x 6 3/4 x 2 1/2" (23.5 x 17.1 x 6.4cm)
Barnes's patent "related to a construction of gage capable of indicating upon a single dial the entire range of pressures combined with extreme sensitiveness under a light pressure without the liability to disagreement of dial indications with the actual pressure by giving way of the spring in active use." (Patent Number 49,961)
Object number
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