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US Patent: 26,152
Combination steam-gage
Patentee:
Enos G. Allen - Boston, MA

USPTO Classifications:
235/117R, 235/131FD, 73/866.3

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

Assignees:
None

Manufacturer:
American Steam Gauge Co. - Boston, MA
National Steam Gauge Co. - Boston, MA

Witnesses:
Albert W. Brown
Robert L. Harris

Patent Dates:
Granted: Nov. 22, 1859

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Enos G. Allen
"Vintage Machinery" entry for American Steam Gauge Co.
Description:
"In the use of large steam engines especially marine engines, have heretofore been employed pressure gages, for indicating the pressure of steam in the boiler, vacuum gages by which the amount of condensing power applied to the cylinder is regulated, a counter for registering the number of revolutions of the propelling wheel or wheels and a clock for indicating the exact time, these all being inserted in separate cases independent of each other, supported by separate standards and each furnished its its own set of cocks, couplings, pipe, &c. ... The present invention consists in combining in one instrument, having but one case and one dial plate, so as to constitute a new article of manufacture, a pressure gage, one or more vacuum gages, a counter for registering the number of revolutions of the propelling wheel and a clock for indicating the exact time. By this arrangement but one case and one set of couplings, standards &c are required, thereby diminishing the cost of manufacture nearly fifty per cent..."

See the inventor's subsequent patent 26,871 for a discussion of the shortcomings of this design.

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