Manufacturers Index - Heron, Gresham & Craven
Heron, Gresham & Craven
Manchester, England, U.K.
Manufacturer Class:
Steam and Gas Engines
This page contains information on patents issued to this manufacturer.
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57,057
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Aug. 07, 1866
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Improvement in injectors for boilers
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James Gresham |
, England |
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. |
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22,721
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Nov. 02, 1885
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Injector
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James Gresham |
, England |
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189,319,951
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Oct. 06, 1894
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Improvements in Injectors and Connected Apparatus for Feeding Steam Boilers with Water
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James Gresham |
, England |
Abstract:
Consists of improvements in injectors described in Specification No. 1728, A.D. 1889, in which the general arrangement of the nozzles &c. is the same Fig. 1 is a longitudinal section of the injector, and Fig. 2 is a section on the line A, B of Fig. 1. Steam enters from the boiler into the chamber a', and thence passes by the valve g, chamber a', and nozzles d, e, e', f to the valve j<1>, whence it returns to the boiler through the valve k. The water enters the tube a<4> and passes through the valve h<2> by the ordinary channels to the boiler, the overflow going down the tube i. The valve h<2> can be fixed down by the handle h<9> which actuates the spindle h<1>, but when this spindle is raised the valve h<2> can be opened or closed by the fluid pressure on one side or the other. When the injector is stopped, the condensed steam can thus pass to the overflow pipe but not to the water-supply pipe a<4>, because the back pressure closes the valve. A similar valve j' prevents the return of fluid from the boiler. A modified form is described in which the valve g becomes a two-way valve, so that steam can be sent through any other apparatus either with or without sending it through the injector. |
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Improvements in Injectors and Connected Apparatus for Feeding Steam Boilers with Water
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Harry Edward Gresham |
, England |
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189,501,903
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Nov. 30, 1895
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Improvements in or Applicable to Injectors for Raising and Forcing Fluids
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James Gresham |
, England |
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Improvements in or Applicable to Injectors for Raising and Forcing Fluids
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George Kiernan |
, England |
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189,910,593
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Mar. 24, 1900
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Improvements in Injectors
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James Gresham |
Salford, Lancashire County, |
Abstract:
Relates to combined injectors and clack-box boiler mountings. The steam supply is controlled by a valve b<2> which when closed acts as a stop valve, when partially open admits steam to the lifting-nozzle c, and when fully opened to both lifting and forcing nozzles c<1>, c. The clack valve g, stop valve h, and flange a may be similar to the same parts described in Specifications No. 1728, A.D. 1889, and No. 19,951, A.D. 1893. |
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Improvements in Injectors
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Frank James Gresham |
, England |
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190,016,537
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Sep. 14, 1901
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Improvements in or Applicable to Injectors.
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James Gresham |
, England |
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Improvements in or Applicable to Injectors.
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Frank James Gresham |
, England |
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