US Patent: 303,252 - Safety Valves


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US Patent: 303,252

Safety Valves

Patentee:

Henry G. Ashton (exact or similar names) - Somerville, MA

USPTO Classifications:

137/473, 137/542, 267/175

Tool Categories:

propulsion and energy : steam apparatus : steam safety valves

Assignees:

None

Manufacturer:

Ashton Valve Co. - Boston, MA

Witnesses:

W. A. Copeland

William Zittel

Patent Dates:
Applied:	Feb. 14, 1881
Granted:	Aug. 12, 1884

Patent Pictures:

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"Vintage Machinery" entry for Ashton Valve Co.

Description:

Improvements to the safety pop-valve of patent 200,119. See also patents 291,126 and 301,079. British patent GB-188,003,849 covers the inventions in all three of these patents.