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Nov 28 1882
To: Isaac Baldwin McQuesten Hamilton Ontario
From: Washington

United States of America
To all whom these presents shall come:

Whereas William Dunn of Buffalo New York has presented to the Commissioners of Patents a petition praying for the [?] of Letters Patent for an alleged new and useful improvement in Feed Water Heater & Steam Boilers. The assigned rights, title and interest in said improvement to Isaac Baldwin McQuesten of Hamilton, Ontario, Canada, a description of which invention is contained in the Specification of which a copy is hereunto annexed and made a part hereof and has complied with the various requirements of Law in such cases made and [?], and Whereas upon due examination made the said Chairman is adjudged to be justly entitled to a Patent under the Law.

Now therefore these Letters Patent are to grant unto the said Isaac Baldwin McQuesten, his heirs or assigns for the term of seventeen years from the twenty eight day of November one thousand eight hundred and eighty two the exclusive right to make use and vend the said invention throughout the United States and the Territories thereof.

In testimony whereof I have hereunto set my hand and caused the seal of the Patent Office to be affixed at the City of Washington this twenty-eighth day of November in the year of our Lord one thousand eight hundred and eighty two and of the Independence of the United States of America the one hundred and seventh.
[Signature] Secretary of the Interior.
[Signature] Commissioner of Patents.

(No. Model.)
W. Dunn
Feed Water Heater for Steam Boilers.
No. 268,203
Patented Nov.28, 1882.
[Five diagrams illustrating the feed water heater for steam boilers]

William Dunn , Inventor
By Wilhelm & Bonner, Attorneys

Edw. J. Brady
Theo L. Popp, Witnesses

United States Patent Office.
William Dunn, Of Buffalo, New York, Assignor to Isaac Baldwin McQuesten, of Hamilton, Ontario, Canada.
Feed-water heater for Steam-Boilers.
Specification forming part Letters Patent No. 266,203, dated November 28, 1882.
Application filed September 27, 1882. (No Model.)

To all whom it may concern:

Be it known that I, WILLIAM DUNN, of the city of Buffalo, in the county of Erie and State of New York, have invented new and useful Improvements in Feed Water Heaters for Steam-Boilers, of which the following is a specification.

This invention relates to improvements in that class of feed-water heaters which consist of a discharge-nozzle, which is arranged in the steam-space of the boiler and delivers feed-water into the steam-space of the boiler in a more or less finely divided state, whereby the feed-water is rapidly heated and its impurities are separated in a granular condition, which permits their ready removal from the boiler by means of the blow-off cook.

The object of my invention is to so construct the discharge device that it can be applied and removed from the outside of the boiler, and that its valve can be separately removed when required to be cleaned, and that the valve is held in its seat by gravity, thereby avoiding the use of springs, which are unreliable and apt to become impaired by the heat, and that the feed-water is delivered in the longitudinal direction of the boiler, thereby preventing it from coming in contact with the sides of the boiler, which would cause incrustations.

My invention consists to that end of the improved constructions which are hereinafter fully described, and pointed out in the claims.

In the accompanying drawings, Figures 1 and 2 are sectional elevations of my improved device at right angles to each other. Figs. 3, 4, and 5 are horizontal sections in lines x x, y y, and z z, Fig.1, respectively.

Like letters of reference refer to like parts in the several figures.

A represents the shell of a cylindrical steam-boiler.

B represents the outer wall of the tubular discharge device, and C a vertical partition arranged in the same, so as to separate the descending passage b from the valve-chamber c. d is the water-inlet, which is connected with the feed-pipe by a union or other suitable coupling.

E represents a cover or cap, which screws into the upper end of the tubular shell B, and e is a circular plate, which rests upon an annular offset, e1, formed in the shell B, and upon the upper end of the partition C, to prevent communication between the upper ends of the spaces b and c. A packing of rubber, leather, or other suitable material may be placed under the disk e.

F represents a conical valve, which rests in a seat, f, formed in the lower portion of the valve-chamber c, and g, is the valve-stem, extending upwardly in the valve-chamber, and provided with projecting arms g1 or other suitable devices for guiding the valve in its movements toward and from its seat.

h h represents the discharge-orifices, arranged in the walls of the chamber c diametrically opposite each other and above the valve F. These orifices are placed in line with the axis of a cylindrical boiler, so that the water issues parallel with the axis of the boiler and not laterally, whereby the feed-water is prevented form coming in contact with the descending sides of the boiler, where it would produce incrustations.

The shell B is made cylindrical above the orifices h, and provided at a suitable height with an external screw-thread, i, which screws into an internally-threaded collar, I. The latter is secured to the shell A of the boiler and surrounds the opening j, formed in the same for the insertion of the lower portion of the water-feeder.

After the device is adjusted by the screws i I, so that the orifices h stand in the desired position, it is secured in place by a jam-nut, J. The lower portion of the outer shell, B, is contracted, as shown in Fig. 2. The feed-water enters through the inlet d, descends through the passage b, rises to the valve F, and raises the same, and escapes through the orifices h into the steam-space of the boiler. The valve F is raised against the steam-pressure under every impulse of the feed-pump or other feed device and seats itself as soon as the impulse of the feed-pump or other feed device and seats itself as soon as the impulse ceases, thereby preventing the steam from entering the feed-pipe. The valve tends to seat itself by gravity, thereby rendering the employment of a spring for that purpose unnecessary.

The shell B and parts contained therein can be readily applied and removed from the outside of the boiler, which is very convenient, as under certain circumstances it becomes necessary to remove these parts from time to time for cleaning the same, and the valve can be removed and cleaned without removing the shell B from the boiler by unscrewing the cap E and removing the washer e.

I claim as my invention-

1. The combination, with the inclosing shell B, of a descending passage, b, a valve-chamber, c, provided with one or more discharge orifices, h, and a valve, F, substantially as set forth.

2. The combination, with the inclosing shell B, of a descending passage, b, and a valve-chamber, c, communicating at their lower ends, a valve, F, and a removable cap or cover, E, which permits the removal of the valve, substantially as set forth.

3. The combination, with the inclosing shell B, of a valve, F, and one or more orifices, h, arranged to discharge the water in the plane of the axis of the boiler only, substantially as se forth.

4. The combination, with the inclosing shell B, provided with a descending passage, b, a valve-chamber, c, and a valve, F, of the removable cap E and plate e, covering both the descending passage b and the valve-chamber e, substantially as set forth.

5. The combination, with the inclosing shell B, provided with a descending passage, b, and a valve-chamber, c, having one or more discharge-orifices, h, of a valve, F, provided with a stem, g, having projecting guides g1, substantially as set forth.

William Dunn.
Jno. J. Bonner
Chas. F. Geyer.

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