USRE3102E - Improvement in steam-generators - Google Patents

Description

. chamber may be heated much higher thanthe diffuser by translation of its atoms.

` UNITED STATES i PATENT OFFICE.;

HENRI L. STUART, OF NIEY YORK, ASSIGNEE OF JOI-IN F. BOYNTON, OF

SYRAOUS n, N. Y.

IMPROVEM ENT IN STEAM-GENERATORS.

Specication forming part of Letters Patent No. 68,598, dated September 10, 1867 autedated July 19, 1867;

' Reissue No. 3. 102, dated August 25, 1368.

DrvIsION B.

To a/ZZ .whom mrtg/ concern:

Beit known that I, HENRI L. STUART, of the city and State of New York, by virtue 'of anassignment from JOHN F. BOYNTON, of Syracuse, New York, bearing date the 6th day of October, 1866, and duly recorded in the Patent Office, am the sole owner of certain Letters Patent for Improvement in Steam- Generators, granted to the said JOI-IN F. BOYN- TON on the 10th day of September, 1867 that I deem the said patent inoperative and invalid by reason of a defective specification; and I do hereby declare that the following is a full, clear, and exact description of that part of the said invention included in this division.

The first part of the said invention, as set forth in this division, relates to a method of preventing steam-boilers from bursting; and it consists in a Ineans for equalizing the temperature in all parts of the boiler. It is a wellknown fact that steam, like air or gases, is a poor conductor of heat, so that steam inthe upper or outer portion of a tube or steam steam in the boiler, and in the same manner a stratum of steam in the upper portion of the steam-space in the boiler may become much. hotter than the lower portion of the steam which lies in contact with the water. Again, "t is known that steam and gas will not convey eat downward as readily as upward, as the eat conveyed downward is by radiation,while cat conveyed upward is by translation of paricles. As in the case of water, steam is a poor conductor of heat by radiation, but a rapid It is believed that explosions of steam-boilers often occur from the' steam inthe upper portion of the steam-space becoming much hotter than that in the lower portion. It is not, however,- the object of this specification to explain the theory upon which this inequality of temperature tends to produce explosions, but to describe the means of obviating such inequality.

rIhe accompanying drawing represents a vertical section of a steam-boiler with internal pipes, and of an automatic heater and feeder attached thereto.

A is the outer wall of the boilerB B,water and steam pipe running through the boiler from bottoml to top; O, openings or jets in the upper portion of the pipe for the passage of.

`in temperature until it passes the water-line,

where it will begin to expand into steam, and

`will finally be discharged in steam-j ets through the openings O in the upper stratum of steam in the boiler, thus securing an equilibrium of Y temperature in the steam throughout` the boiler. The second part of said invention, as set forth in this division, relates to an automatic y heater and feeder, describe.

F is a reservoir, in which water is first heated by the exhauststeam, and from which it is automatically fed to the boiler. E is a steampipe for equalizing the pressure in the boiler and the automatic reservoir F. II is the induction-pipe for the exhaust-steam; G, aehamber surrounding the automatic reservoir for heating the feed-water and condensing` the escaped steam. I is the exit for uncondensed exhaust-steam; J, flues for the passage of escaped steam 5 D, a pipe for the passage ofthe water by its own gravity from the reservoir F to the boiler' of the tube B 51K, a pipe for conveying the water of the condensed steam to which I will now proceed to the force-pump; L, point for fattaching forcepump; N, feed-pipe for supplying reservoir from a hydrant or from a eist-ern automatically by means of the vacuum formed by condensing steam when cocks Nos. 1, 2, and 3 are closed, and No. 8 open, and M M are supports for the automatic feeder. `When cock 2 is opened, the pressure of the steam in the fboiler and inthe automatic reservoirwill iiow by its own gravity into the boiler through pipe D if cock 3 be opened, or into the tube B if cock 1 vbe opened. When cock 4 in pipe K is opened, the water of the condensed steam will iiow down to the force-pump. It will be observed that when cock No. 1 is closed and cocks Nos. 2 and 3 open the water from the reservoir willl pass directly into the boiler Without traversing the tube B. When cock 3 is closed and l and 2 open7 the Water Will passv into the tube B only; but when cocks l, 2, and 3 are all open the Water vwill pass from the reservoir into the boiler directly, and into the tubeB at the saine time. Before passing tothe boiler or the tube B the Water in the reservoir will be Well heated by means of the exhaust-steam.

What I elaiin in this division as the invention ofthe said JOHN F. BoYNToN, and desire to secure by Letters Patent, is-

`l. The perforated tube B Within the boiler,

2. In combination with a steam-boiler, the

automatic heater and feeder when constructed, arranged, and operating substantially as described.

HENRI L. STUART.

Vitnesses:

WM. BARKER, HORACE GREELY, SAML. SMELAIR.

Images