US Patent: 57,057 - Improvement in injectors for boilers


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US Patent: 57,057

Improvement in injectors for boilers

Patentee:

James Gresham (exact or similar names) - Manchester, England

USPTO Classifications:

417/175

Tool Categories:

propulsion and energy : steam apparatus : stationary boilers : feedwater apparatus

Assignees:

None

Manufacturer:

Heron, Gresham & Craven - Manchester, England

Witnesses:

Peter J. Livsey

W. Giffard

Patent Dates:
Granted:	Aug. 07, 1866

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Jeff Joslin
Vintage Machinery entry for Nathan & Dreyfus; Nathan Mfg. Co.
1908 Patent Commissioner decision

Description:

Improvements to Giffard's injector (see British patent issued to John Robinson and James Gresham on 1864-11-10) to allow it to draw a vacuum, avoiding the need for priming it when there is air in the supply-pipe. This Gresham patent seems to have been notable: according to a 1908 Patent Commissioner decision (see link), the New York firm of Nathan & Dreyfus, later Nathan Mfg. Co., began manufacturing this design of injector in 1881, a couple of years after the patent expired.