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US Patent: 476,512
Device for testing pressure-gauges
Patentee:
Charles Bartlett Bosworth - Everett, MA

USPTO Classifications:
73/1.68, 73/1.69

Tool Categories:
propulsion and energy : steam apparatus : stationary boilers : steam pressure gauges

Assignees:
Crosby Steam Gage & Valve Co. - Boston, MA

Manufacturer:
Crosby Steam Gage & Valve Co. - Boston, MA

Witnesses:
Dudley P. Bailey
J. H. Millett

Patent Dates:
Applied: Feb. 17, 1892
Granted: Jun. 07, 1892

Patent Pictures:
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"Vintage Machinery" entry for Crosby Steam Gage & Valve Co.

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