US548455A - Steam-boiler - Google Patents

Description

(No Model) J. PIERPOINT. STEAM BOILER.

No. 548,455. Patented 051;. 22, 1895.

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JAMES PIERPOIN'I, OF PITTSBURG, PENNSYLVANIA.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 548,455, dated October 22, 1895.

3 Application filed October 31, 189 Serial. No. 27, (N0 m de To all whom it may concern:

Be it known that 1, JAMES PIER-POINT, of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Steam-Boilers, of which the following isa full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification, in which the figureis a vertical longitudinal section of my improved boiler.

My invention relates to vertical water-tube boilers, and is designed to simplify, cheapen, and improve their construction.

To that end it consists in an upper steam and water drum, a lower mud-drum, a bank of tubes connecting these drums, and a partition-wall located between the tubes of the bank and arranged to cause an up-and-down pass of the furnace-gases over the tubes and by keeping certain of the tubes in a cooler place insure a strong circulation and efficient abstraction of heat.

In the drawing, 2 represents the upper steam and water drum, 3 the mud-drum, and at the bank of tubes connecting the same. Between the central rowsof this bank is placed the transverse fire-brick partition 5, which extends from the mud-drum upwardly to a point near the steam and water drum.

6 is the furnace, from whence the gases pass upwardly among the front rows of the bank, then descend among the rear rows, and thence ascend through the outlet-flue 7. Deflectingplates 8 are employed to hold the gases in contact with the tubes, thus insuring the ab-' straction of heat thereby.

In the steam and water drum I provide a vertical longitudinal battle-plate 9, which is preferably bolted to the inside of the shell by angle-irons 10 at the ends and extends upwardly to a point above the water-level. This plate extends between the tube ends, and the feed-water entering through the pipe 11 on the left-hand side of the plate is prevented thereby from mingling with the hotter water rising through the tubes nearer the furnace, but descends through the rear rows in a less violent manner than in the main circuit, from which it is cutoff by the baffle-plate, thereby giving a much better deposition of sediment.

The heat of the gases is fully extracted on account of the lower temperature of the rear tubes down which the feed -water passes, while a violent circulation takes place between the front rows and these rear rows, which are not cut ofi by the battle-plate.

The advantages of the invention are appar out, the arrangement of the parts being simple, compact, and highly effective.

I claim- I. Awater-tube boiler comprising an upper transverse steam and water drum, a lower mud drum, a series of substantially parallel tubes connecting these drums, a vertical transverse partition between the tubes, and deflecting plates arranged to hold the gases among the tubes; substantially as described.

2. A water-tube boiler comprising an upper transverse steam and water drum provided with a vertical battle-plate extending to the bottom of the drum, a lower mud drum, tubes connecting these drums, and a vertical transverse partition between the tubes; substantially as described.

3. A water-tube boiler comprising an upper transverse steam and water drum provided with a Vertical bathe-plate extending above the water level and a feed pipe entering on one side of the plate, a lower mud drum, tubes connecting these drums, and avertical transverse partition between the tubes; substantially as described.

In testimony whereof I have hereunto set my hand.

JAMES PIERPOINT.

Witnesses:

H. M. ConWIN, O. BYRNES.

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