US205304A - Improvement in heaters - Google Patents

Description

D. SULLIVAN.

Heater. r

Patented June 25, 1878.

UNITED STATES PATENT OFFICE.

DANIEL SULLIVAN, OF BANGOR, MAINE.

IMPROVEMENT lN HEATERS.

Specification forming part of Letters Patent No. 205,304, dated June 25, 1878 application filed May 13, 187B.

To all whom it may concern:

Be it known that I, DANIEL SULLIVAN, of

- Bangor, in the county of Penobscot and State which form a part of this specification, and in which-is shown a longitudinal section of my invention.

My invention relates to an improvement in heaters; and consists of a boiler, substantially of the construction hereinafter described, suitably cased, and adapted to be used either as a steamgenerator, for heating by steam by the usual radiators, or as a hot-air heater, the air being heated from boiling water, and distributed by pipes and registers, as in the ordinary hot-air furnace, or as both combined.

It will be understood by reference to the accompanying drawing.

At a is shown the fire-chamber, provided with fire-tubes b, which extend through a water-back, 0, into a fire-back, 01, leading into a flue, e. Surrounding the fire-chamber is a casing, f, forming a water-space, 9, around it, also provided with tubes h, surrounding the tubes 1), and connecting with the water-back 0. Over the whole is placed a steam-drum or reservoir, i, connecting at one end with the space 9, and at the other with the water-back c.

The distance between the casing f and the water-back c (greater or less, as desired) is spanned by the double tubes b h, and the whole is inclosed in a casing, j, having a coldair feeder, k, and hot-air pipes 1, leading therefrom, as in the ordinary furnace.

The cold-air feeder may be provided with a damper, k, to stop the supply.

It will be observed that the surface exposed to the fire is entirely surrounded by a waterspace, which, in its turn, is surrounded by an air-space, to which air may be admitted or cut off, at will.

The heater may in consequence be used in three ways First, as a steam-heater, by cutting off the cold-air supply at 7c, thus preventing condensation in the tubes, &c., and leading ul steam from the drum or reservoir 17 to the or dinary radiators; second, by cutting off the steam-conductors n and admitting the cold air, which, entering the casing j and circulatin g through and among the tubes and over the chamber and drum, is heated by the boiling water contained therein, and ascends through the hot-air conductors and registers, as in the ordinary hot-air furnace; third, by combining these plans and using both steam and hot air.

My heater may, of course, be provided with any ordinary and proper grates, safety-plugs, draft-regulators, &c.

The double tubes 12 h, together with the water-back c and a corresponding water-compartment at the other end, and a fire-back, d, may be combined with the common hot-air furnace, greatly increasing its heating power and improving the quality of the hot air. In such case the back of the furnace is removed and the water-back c inserted in its place, the flame and heat passing through the tubes 1) to the fire-back and flue, as now.

This invention is an improvement on that for which a patent was granted to me April 30, 1872, in which the outer casin g surrounded an ordinary steam-boiler. In this, however, the boiler or heater is made in two sections, connected by the double tubes 11 h, which are incased and exposed to the incoming air.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In combination with a steam-boiler having a water-space surrounding all its fire-surfaces, a body consisting of uncased tubes b h, connecting its end sections and the ordinary fittings of a steam-boiler, the casingj, inclosing the whole, having a cold-air feed pipe and the ordinary fittings of a hot-air furnace, both the steam-pipes and the cold-air feeder being provided with cut-offs, whereby either steam or hot air may be used for heating singly, or both combined, substantially as set forth, for the purposes specified.

2. In a heater having a casing, j, provided with an air-feed pipe, the double tubes b h, exposed within the casing to the incoming air, substantially as described, for the purposes specified.

3. A heater constructed substantially as In testimony that I claim the foregoing I have hereunto set my hand. this 8th day 0t May, 1878.

DANIEL SULLIVAN.

' Witnesses:

JOHN B. MAsoN, WM. FRANKLIN SEAVEY.

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