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US Patent: 44,006
Steam-Boiler Indicator
Improvement in Steam-Boiler Whistles
Patentees:
Levi E. Lincoln - Lowell, MA
Elizabeth K. Lincoln - Lowell, MA

USPTO Classifications:
116/137R

Tool Categories:
wrenches : auxiliary wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Thos. J. Day
G. S. Huntoon
Tappan Wentworth

Patent Dates:
Granted: Aug. 30, 1864

Patent Pictures:
Levi E. Lincoln patent August 30, 1864
USPTO pdf tiff
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Description:
The patent is for a whistle which self-adjusts to steam pressure. The auxiliary wrench is described in the specifications and shown in the drawings.

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