US1057062A - Marine boiler. - Google Patents

Description

KING.

MARINE BOILER.

APPLICATION FILED JULY 1, 1912,

1,057,062. Patented Mar. 25, 1913.

ZMYIZGOdGd. a Inventor Yn- W t W .zlilmizey COLUMBIA PLANDGRAPH 60., wAsl-IINGTON. D. c.

EDWARD KING, or ZURICH, SWITZERLAND.

MARINE BOILER.

Specification of Letters Patent.

Patented Mar. 25, 1913.

Application filed July 1, 1912. Serial No. 706,860.

To all whom it may concern:

Be it known that I, EDWARD KING, a subject of the King of Great Britain and Ireland, and residing at 51 Kilchbergstrasse, Zurich, Switzerland, have invented certain new and useful Improvements in Marine Boilers, of which the following is a specification.

This invention relates to marine boilers.

Fire tube marine boilers are known in which a separate water circulating tube extends from the furnace tube at a point thereof near the rear wall of the combustion chamber in which the direction of the gases is reversed, and passes longitudinally of the said furnace tube to the upper part of the furnace tube in front of the front Wall of the said combustion chamber.

The present invention relates to aspecial construction of boiler of this kind, the boiler being a double boiler with a common combustion chamber. It is obvious that in this case the water circulating tube of each single half of the boiler cannot run from the wall of the combustion chamber, which is the rear wall for this half of the boiler and the front wall of the combustion chamber for the other half of the boiler, and vice versa, in order to send the water in the lower part of the boiler upwardly and obtain a vigorous circulation of the water. This difiiculty is obviated according to the present invention by combining, in such double boilers which have a common combustion chamber, the water circulating tube of one half of the boiler, with the water circulating tube of the other half of the boiler, underneath the combustion chamber, and leading both as one tube o the lower part of the furnace tube.

The accompanying diagrammatic drawing illustrates a double boiler according to this invention in longitudinal section.

a is the boiler shell, Z) the furnace tube 0 the groups of fire tubes of the left hand half of the boiler, and 0 the groups of fire tubes of the right hand half of the boiler, cl is the common combustion chamber wherein the direction of the gases is changed. The two water circulating tubes 2 and 2 extend longitudinally of the furnace tube 6 in a forward direction that is to say toward the fire doors of the respective halves of the boiler, and each extends from the upper part of the furnace tube at a part thereof in front of the corresponding wall of the combustion chamber cl into the water chamber.

The two tubes pass underneath the combustion chamber 03 and communicate with a single tube .2 that extends through the lower part of the furnace tube at apart about midway of its length. In this arrangement, as in the known single boiler, there is a vigorous circulation of the water from the bottom upwardly, as well as for each half of the boiler from the rear; that is to say for the boiler as a whole from the middle partt-hereof outwardly and toward the front of the boiler inwardly in suchwise that the water is supplied to the fire tubes not only from the top and from the sides of the boiler but also for each half of the boiler from the rear and from below. In like manner the circulation, of the water for each half of the boiler takes place in a contrary direction to the passage of the flame of the particular half of the boiler and in an upward direction so that any unequal expansion and consequent leakages are prevented.

In consequence of the immediate commencement of the circulation and the rapid heating up of the double boiler thereby caused, and on account of the increase of the heating surface by the circulation tubes 2, a a, built into the most effective part of the boiler, and finally'in consequence of the protection of the corners against blowpipe flames, etc., the present arrangement possesses the same advantage as the single boiler.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:-

1. In a fire tube marine double boiler, having a furnace tube fired from both ends and a common combustion chamber wherein the direction of the gases is changed, the combination of water circulating tubes extending from the water space of each half of the boiler at either end of the common combustion chamber and at the upper part of the furnace tube, and a tube common to said water circulating tubes extending through the lower part of said furnace tube.

2. I11 a fire tube marine double boiler, having a furnace tube fired from both ends and a common combustion chamber wherein the direction of the gases is changed, the combinati-on of water circulating tubes extending from the water space of each half of the boiler at either end of the common combustion chamber and at the upper part of the furnace tube said tubes combining to form a single tube which extends downwardly through the lower part of the furnace tube at a part about mid-way of its length.

3. In a fire tube marine double boiler, having a furnace tube fired from both ends and a common combustion chamber wherein the direction of the gases is changed, the combination of water circulating tubes extending from the water space of each half of the boiler at the upper part of the furnace tube and in front of the combustion chamber said tubes extending underneath the combustion chamber, and a tube common to said water circulating tubes extending downwardly through the lower part of the furnace tube.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD KING.

Witnesses:

AUGUST RUEGG, MARTIN PLONDA.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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