Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS154544 A
Publication typeGrant
Publication dateSep 1, 1874
Filing dateJul 3, 1874
Publication numberUS 154544 A, US 154544A, US-A-154544, US154544 A, US154544A
InventorsClaek W. Dotes
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Improvement in feed-water heaters
US 154544 A
Previous page
Next page
Description  (OCR text may contain errors)

c. w. noTEN. yFeed-Water Heaters.

N0 154 544 Y PafentedSerpc.1,




Specification forming part of Letters Patent No. 154,544, dated September 1, 1874; application filed July 3, 1874.

To all lwhom 'it may concern Be it known that I, CLARK W. DoTEN, of Boston, in the county of Suffolk and State of Massachusetts, have invented -certain'new and useful Improvements in Feed-VVaterl Heaters; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in feed-water heaters for steam-boilers,-consist ing in the combination, with the feed-pipe from the force-pump, of a chamber or receptacle having one or more communications from the water-space in the boiler, and check-valves arranged thereon in such a manner that they will close when the pump is forcing the water into the said chamber or receptacle, and open for the admission of the hotwater from the boiler into the said chamber or receptacle when the pump is on its backward stroke, by which arrangement the water forced from the feed-pump is-,brought in intimate contact with the hot water from the boiler in the aforesaid receptacle or chamber previous to being forced into the boiler, in which manner the temperature of the feed-water is raised very materially before it is forced into the boiler, thus saving a great amount of the fuel used for the generation of steam in the boiler. The feed-pipe is provided with a check-valve, arranged between the aforesaid chamber or receptacle and the feed-pump, for the purpose of preventing back pressure on the pump when it is drawing water. The feed-pipe from the pump terminates in the aforesaid chamber or receptacle as a perforated pipe, by which arrangement the cold water that enters the said receptacle through the perforated pipe is more intimately brought in contact with the hot water from the boiler, as will now be herein more fully shown and described.

On the drawings, Figure 1 represents a ground plan of my invention, and Fig. 2 repi resents a central longitudinal section of the same.

Similar letters refer toV similar parts wherever they occur on the drawings.

c represents the feed-pipe from the pump, provided with a check-valve, b, for the purpose of preventing back pressure on the pump. The feed-pipe c terminates as a perforated pipe or nozzle, c, in the chamber or receptacle d, as shown in Fig. 2. The chamber d is shown as a hollow globe, but I may substitute therefore any other form or shape as may be most expedient. From the waterspace in the boiler to the chamber 01,1 arrangeone or more inlets, c e', provided, respectively, with check-valves ff', arranged in such a manner that the hot water from the boiler will iiow into the chamber d when the feed-pump is on its backward stroke, through the valves f f; but that the water in the vchamber d is prevented from being forced by the check-valves f f when the feed-pump is forcing the water into the said chamber d. g represents a delivery-pipe from the chamber d, for the heated water to the boiler, which pipe may be provided with a checkvalve, if necessary, without departing from the spirit of my invention.

The operation of my improved feed-water heater is as follows: When the feed-pump is drawing water-that is, when it is on its backward stroke-the check-valve b is closed automatically by the pressure in the chamber d at the same time as the valves ff', one or more, are opened automatically by the pressure of the steam in the boiler, thereby admitting a small quantity of the hot water from the boiler into the chamber d, which hot water comes in intimate contact with the cold water that is forced subsequently by the pump into the chamber d. The water, after being heated and mixed in the chamber d, is forced through the pipe g to the boiler.

Having thus fully described the nature, construction, and operation of my invention, l wish to secure by Letters Patent and claimv l. In combination with a receptacle, d, of the feed-pipe c, its check-valve b, one or more In testimony that I claim the foregoing as my own invention I have a'ixed my signature in presence of two witnesses.


Witnesses: I


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2716424 *Dec 26, 1951Aug 30, 1955Watts Mfg CompanyHot and cold water mixing valves
US2758610 *Aug 3, 1953Aug 14, 1956Hively Vern JTempering valve for tempering water
US2973151 *Jan 28, 1959Feb 28, 1961Gadget Of The Month Club IncShower spray
US3003638 *Mar 18, 1957Oct 10, 1961Union Tank Car CoBrine supply system for fluid treatment apparatus
US3130452 *Dec 18, 1961Apr 28, 1964Exxon Research Engineering CoApparatus for molding thermoplastic materials
US3306587 *Jul 1, 1964Feb 28, 1967Combustion EngApparatus for mixing fluids
US3613723 *Feb 3, 1970Oct 19, 1971Witt Max EChlorine injection means
US5082372 *May 22, 1991Jan 21, 1992Gas Technology Resources Flotron, IncorporatedFluid mixing device
US7374332 *Oct 21, 2004May 20, 2008Konica Minolta Holdings, Inc.Method, device and system for mixing liquids
US7934865 *Feb 8, 2005May 3, 2011Ehrfeld Mikrotechnik Bts GmbhMicromixer
US8215825 *May 20, 2005Jul 10, 2012Tronox LlcFluid mixing apparatus and method
US8602634 *Oct 5, 2004Dec 10, 2013Wetend Technologies OyMethod and apparatus for feeding chemical into a liquid flow
Cooperative ClassificationB01F5/045