US14271A - Caldron - Google Patents

Description

H. NEWSHAM.

Domestic Boiler.

Patented Feb. 12..; :1856.

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HENRY NEWSHAM, OF BALTIMORE, MARYLAND.

CALDRON.

Specification of Letters Patent No. 14,271, dated February 12, 1856.

To all whom it may concern:

Be it known that I, HENRY NEWsI-IAM, of the city and county of Baltimore and State of Maryland, have invented certain new and useful improvements in the construction of a portable caldron and furnace combined, formed of one piece of casting,

adapted to agricultural purposes, such as granted, although there were several ad vantages gained, still in the practical application and use of his caldron, there have been disadvantages developed,

improvement in this highly important adjunct to agricultural pursuits I feel assured I have overcome them, and upon the value of the improvements I predicate this application.

One prominent disadvantage in Motts, is the wasteof fuel caused by radiation from the exterior of his flue space. The improvement I have made to overcome this, is, that by the extension of the sides of my caldron in connection with the arch form of the bottom (instead of the cup shaped employed) I am enabled to interpose a water space nearly surrounding the fuel, by which radiation is prevented, and as an evidence of this fact in numerous experiments made with my caldron, the sides thereof have kept cool enough to bear the hand while the water therein reached boiling heat. Another advantage arising from keeping the sides cool is in relieving the attendants on the caldron when emptying it of its contents, of the scorching heat by which they have not only been incommoded but their clothes endangered by scorching heat from his exterior casing. .In economy of fuel I have greatly the advantage arising from the arched form of the bottom, which in fact forms the furnace itself. By giving the bottom this arched form I am enabled to raise the fuel above the lower portions of the water in the caldron and also bring the ignited portions in immediate contact with nearly the whole surface of the bottom.

some of which I w1ll enumerate, lnasmuch as by my This is important when it is considered that anthracite coal so universally employed is possessed of slow conducting and radiating properties. Another difficulty in Motts caldron is that its contents must be removed by dipping out or removal of the caldron from the outer casing and overturning thereof. This I overcome by my mode of construction admitting of the use of a large discharge cock at the lowest port-ion of the caldron by which it may be emptied. A. further difliculty experienced in the use of Motts, is the liability of the sides to crack by the overflow of the contents of the cal dron on the red hot sides thereof producing the evil by the sudden contraction of the metal. This objection I have completely overcome as fully before set forth.

The expense of all other caldrons and furnaces is increased by the number of pieces composing the same, but in my improvement a single piece of casting embodies'the caldron and the furnace, themaj or part of the latter formed by the arch. This form possesses the advantage over either a flat or cup shaped bottom of greater strength with less metal employed, besides the quantity saved by dispensing with an outer case entirely.

My caldron is not dependent on specific form of furnace, as the arched form of the bottom adapts it the more readily to any form or construction; thus instead of using cast iron supports for the grate bars, brick work answers equally as well. Its form also admits of easy removal when necessary and being in a single casting expense of transportation is reduced as well as liability to breakage also. An advantage not to be overlooked is the manner in which the heat acts on the water; as the greatest heat is near the center of the arch the water there boils up, and then descends by the outer walls or sides of the caldron, in this way producing a rolling over of the contents thereof.

Figure 1 is a perspective view of the caldron placed on a cast iron stand for the grate bars; Fig. 2, an underside view of the bottom of the caldron; Fig. 3, a longitudinal and Fig. t a cross section.

The description is as follows: A, the body of the caldron; c 0, side walls thereof cast in the same piece with b b, the walls forming an arch B of the bottom of the caldron.

e, e, are flanged ribs cast on the flat portom thereof an arched form in the manner described and for the purposes specified.

In testimony whereof I have hereunto signed my name before two subscribing Witnesses.

HENRY NEWSHAlW.

Witnesses Y WM. S. CLARK, JOHN S. HoLLINesHEAD.

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