US742938A - Steam-boiler. - Google Patents

Description

No 742,938. PATENTED NOV. 3, 190a.

' D. M. WEBSTER.

STEAM BOILER. APPLICATION FILED DEC. 3, 1902.

NO MODEL. 2 SHBBTS-SHEET 1.

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I PATENTED NOV. 3, 1903. D. M. WEBSTER.

STEAM BOILER.

APPLICATION FILED D130. 3, 1902.

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UNITED STATES Patented November 3, 190

PATENT OFFICE.

DANIEL M. WEBSTER, OF MANSFIELD, OHIO, ASSIGNOR. TO THE AULTMAN & TAYLOR MACHINERY COMPANY, OF MANSFIELD, OHIO, A CORPORATION OF OHIO.

STEAM-BOILER.-

SPECIFICATION forming part of Letters Patent No. 742,938, dated November 3, 1903.

; Application filed December 3, 1902. Serial No. 133,795- (No model.)

To all whom it may concern.-

Be it known that I, DANIEL M. WEBSTER, of Mansfield, in the county of Richland and State of Ohio, have invented a new and useful Improvement in Steam-Boilers, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a side elevation, partially in section, of a, steam-boiler constructed in accordance with my invention; and Fig. 2 is a horizontal section on the line II II of Fig. 1.

In the drawings, 2 represents the steam and water drum, 3 the mud-drum, and 4 the conmeeting-tubes, of a water-tube boiler.

5 is the furnace-chamber, 6 the brick setting or shell of the boiler, and 7 the outletflue extending through the upper drum,which.

is preferably made of annular form, the bank of tubes being correspondingly annular in their arrangement.

8 is a circulating-pipe which extends outside the brick shell from the water-space of the upper drum to the mud-drum outside of the tube-chamber, so that, being in a cooler part, it may induce a circulation up through the water-tubes.

For the purpose of superheating the steam obtained from the boiler I form in the upper drum an annular jacket 9, surrounding the outlet-flue 7 above the water-line, and provide it with a steam-delivery pipe 10, extending to the exterior of the boiler,- and with a steam-inlet opening 11, preferably separated from the outlet by a partition 12, so that the steam entering at the inlet will travel around the jacket to the outlet and, being subjected in its passage to the heat communicated through the material of the steam-drum from the hot gases, will be highly superheated thereby. This device is important, because by superheating the steam in the eflicient manner which it'renders possible the utility of the boiler is increased and desirable results are secured. This may be applied not-only to boilers in which the outlet-flue extends through the steam-drum, but to boilers in which the hot gases pass on the exterior of the drum; but in such case the steam-jacket should be applied to the outer shell.

I have also provided my boiler with means for preventing priming, by which I mean the carrying of water out with the steam by rea son of the rapid circulation of the water through the tubes, which in some cases is so violent as to cause to a serious extent the evil just mentioned. For this purpose I place in the steam-drum a submerged perforated or grid-like plate 13, situated below the waterline, preferably only a few inches below the same. This plate may extendentirely across the steam-drum'or it may be placed only in that part of the drum which is opposite the ends of the tubes in which the most violent ebullition occurs. Even when the water is oily, which generally causes the most violent ebullition, the presence of the perforated baffle-plate is sufficient} to check the foaming and it renders it harmless.

In order to prevent unequal heating of the tubes of the boiler and to cause the gases to pass through among the rear tubes to as great an extent as among the front tubes, I employ in addition to the ordinary baflieplates 15, which are set in the space in the center of the bank of tubes, a vertical deflectingplate 16, which extends upwardly from the upper battle and partially around the circumference thereof, terminating sufiiciently far from the upper end of the bank of tubes to leave an intervening space for passage of some of the gases. This deflector serves to obstruct somewhat the path of the gases at the front portion of the bank of tubes and deflects the current toward the rear of the setting, and in this way I am anabled to secure an almost perfect distribution of the gases among the tubes of the boiler. In practice I prefer to extend the deflector about half-way around the baffle-plate, as I flnd that this gives the most desirable results under ordinary conditions; but its shape and size may be varied by the skilled mechanic.

I claim- 1. A steam-boiler having an annular bank of tubes, a baffle-plate set in the central space and a deflector plate extending upwardly from the baffie and partially around the circumference thereof; substantially as described.

2. A steam-boiler having an annular bank of tubes, a baflie-plate set in the central space and a deflector-plate extending upwardlyof tubes and a deflector at the upper portion thereof, said deflector obstructing the gaspassage at one part of the setting more than the others; substantially as described.

4. A steam-boiler having an annular bank of tubes, and a deflector at the upper portion thereof, said deflector obstructing the gaspassage at the front of the setting more than at the rear; substantially as described.

In testimony whereof I have hereunto set my hand.

DANIEL M. WEBSTER.

Witnesses:

E. W. GANS,

B. HUNTHAL.

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