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Publication numberUS389900 A
Publication typeGrant
Publication dateSep 25, 1888
Publication numberUS 389900 A, US 389900A, US-A-389900, US389900 A, US389900A
InventorsF. Peatt
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Coil feed-water heater
US 389900 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

(No Model.) I



No. 389,900. Patented Sept. 25, 188,81

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SPECIFICATION forming part of Letters Patent No. 389,900, dated September 25, 1888.

Application filed June 23, .1887. Serial No. 242,271. (No model.)

To aZZ whom it may concern:

Be it known that we, RoNnLLo F. PRATT, acltizen of the United States, residing at Revere,1n the county of Suffolk and State of Massachusetts, and CHARLES D. WAINWRIGHT, a citizen of the United States, residing at Medford, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Coil Feed-Water Heaters or Condensers, ofwhich the followingis a specification.

The object of our invention is to produce a coil feed-water heater, superheater, or condenser that will be more efficient and economical than those now in use; and the invention consists of a series of tubes bent into the form of a volute and secured at their inner ends to a central vertical pipe and at their outer ends to another vertical pipe and inclosed within a suitable casing. Referring to the accompanying drawings, Figure 1 represents a coil-heater with settling-chamberembodying our-invention. Fig. 2 is a horizontal section taken on line a: or of Fig. 1.

A represents a base-piece divided horizontally by a partition, B, the lower part forming a settling-chamber, C. To the top of the base-piece A is secured a casing, D, of cast or wrought iron, which is provided with a cover, E.

F is a central vertical pipe secured in any suitable manner to the partition B, so as to communicate with the chamber 0.

G G are spirally corrugated tubes bentinto the form of a volute, and secured at their inner ends to the central pipe, F, and their outer ends are secured to a vertical pipe, H, which leads to the steam-boiler.

I is the inlet for the exhaust-steam, and J the outlet, (or vice versa;) K, the water-inlet, and L is a blow-off. The exhaust-steam is admitted at I, and passes down around and between the volute coils, and then escapes at ater is admitted at K into the settling-chamber C, where any sediment contained in the water will be deposited. The

water then passes up the pipe F and through the volute coils G G into the pipe H, and thence to the boiler.

By the employment of spirally-corrugated tubes a much greater heatingsurface is obtained than with plain tubes, therefore rendering it much more effective in heating or cooling, and as the corrugations form a succession of arches both longitudinally and transversely the strength of the tube is much greater. Therefore a thinner tube can be employed, which gives greater efficiency in the transmission of heat, and consequently a greater saving of fuel.

Should any scale be deposited upon the tubes G, the expansion and contraction of the said tubes will render them self-cleaning, so that they are automatically freed from scale without injury to their connections, and, when required, can be blown off at the blowoff L.

If it is desired to use the apparatus as a condenser, the steam is passed through the volute coils and cold water caused to circulate around it.

If desired, the settling-chamber may be dispensed with, in which case the lower end of the pipe F will pass through the side of casing D. v

Instead of spirally-corrugated tubes, plain tubes may be employed, but not with such beneficial results. A

hat we claim as our invention is-= 1. In a feed-water heater, a series of pipes bent into the form of a volute and arranged in parallel planes one above another, secured at their outer ends to one vertical pipe and at their inner ends to another vertical pipe, said volutes and said vertical pipes being inclosed within a suitable casing, substantially as and for the purposes set forth.

2. In a feed-water heater, the combination of the volute pipes G G and vertical pipes F H, inclosed within the casing D and cover E, substantially as shown and described.

3. In a feed-water heater, the volute pipes G G and vertical pipes F H, said volute pipes lying in horizonia'i parallel ianes one above another, and said vertical pipes and said vo lutes being within the casing, in combination names to this specification in the present-e 01" two subscribing witnesses.


with casing D, base-piece A, and settling- CHARLES D. W'AIN\VRIGHT. 5 chamber 0, substantially as shown and de- Witnesses:

scribed. HENRY W. FoLsoM,

In testimony whereof We have signed our E. PLANTA.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2492407 *May 4, 1945Dec 27, 1949Lummus CoCatalytic reactor
US3404731 *Jul 12, 1966Oct 8, 1968Paul A. CushmanCombined exhaust silencer and heat exchanger
US3422887 *Jun 19, 1967Jan 21, 1969Graham Mfg Co IncCondenser for distillation column
US3451986 *May 18, 1965Jun 24, 1969Aquitaine PetroleProcess and apparatus for the mass polymerisation of aryl vinyl compounds
US4272667 *Jul 10, 1978Jun 9, 1981Edward GolowaczElectric fluid heating apparatus employing stackable heat transfer modules
US6423279Oct 16, 2000Jul 23, 2002Harvest Energy Technology, Inc.Compact endothermic catalytic reaction apparatus
US6585785Oct 27, 2000Jul 1, 2003Harvest Energy Technology, Inc.Fuel processor apparatus and control system
US6835360Oct 15, 2001Dec 28, 2004Harvest Energy Technology, Inc.Compact endothermic catalytic reaction apparatus
US7074373Nov 13, 2000Jul 11, 2006Harvest Energy Technology, Inc.Thermally-integrated low temperature water-gas shift reactor apparatus and process
US20020043022 *Oct 15, 2001Apr 18, 2002Warren David W.Compact endothermic catalytic reaction apparatus
US20060260789 *May 18, 2005Nov 23, 2006Yasuaki NakagawaHeat exchange unit and heat exchanger using the heat exchange unit
Cooperative ClassificationY10S165/437, F28D7/024