US1261104A - Steam locomotive-engine. - Google Patents

Description

E. E. COTHRAN. STEAM LOCOMOTIVE ENGINE.

1 APPLICATION FILED JULY 20. 1915.

1,26 1, 1 04., Patented Apr. 2, 1918.

WITN ESSl-fl :rNvENToR away.

showing from in front a part of the smoke- T FFIQQ EDWARD EVERETT COT IRAN, 0F WRIGHT, CALIFORNIA.

I STEAM LOGOMOTIVE-ENGINE.

menace.

of the fire tubes of the boiler to heat the cylinders with such gases from such fire tubes by meansof pipes conducting such gases from such fire tubes into jackets surrounding such cylinders and thence discharging such gases from the jackets, with a draft produced by the exhaust steam, into the smoke-box 0f the engine; and the objects of my invention are, first, to supply a constant and uniformly high temperature to the cylinders; second, to prevent harmful condensation of steam in the cylinders during expansion and the strokes of the pistons; third, to minimize and compensate the present losses in the energy of live steam caused by the radiation of heat and the cooling of the walls of the cylinders; and, fourth, to save fuel and increase the efficiency of steam in the engine.

I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a longitudinal section through the smoke-box of the steam locomotive engine, with part of cylinder jacket broken Fig. 2 is a vertical cross section box, showing the position of a semi-circular pipe employed for conducting the hot waste gases from part of the fire tubes of the boiler into jackets that surround the cylinders of the engine.

Similar numerals refer to similar parts throughout the several views.

In Fig. 1, 1 is the smoke-box of the steam locomotive engine; 2 are the fire tubes of the boiler; 3 is part of a pipe which is fully hereinafter described also as 3 in Fig. 2; 4 is one of the cylinders of the engine; 5 is one of the jackets which surround the cylinders; 6, 7 and 8 are bafiles constructed between each cylinder and jacket to prevent the waste gases beingdrawn across the top of the cylinders and unequally heating the Specification of Letters Patent.

Patented Apr. 2, rate.

Application filed July 20, 1915. Serial No. 40,922.

same; 9 is one of the exit pipes for the exit of the waste gases from one of the jackets; 10 is the exit pipe for the exit of the waste gases from the other jacket upon the opposite side of the engine; 11 is a junction or union pipe, outside the smoke-box, of the two exit pipes 9 and 10 and 12 is a sleeve constructed around the sides of the steam exhaust nozzle,13. Said junction or union pipe, 11, passes into the smoke-box at the bottom and center of the barrel or shell of the smoke-box, from the front-ends of the jackets, and leads to, and is terminated and expanded as the said sleeve, 12, that is constructed around the sides of the steam exhaust nozzle, 13. 1 1 is a door that is constructed at and inthe apex and forward curve of the pipe, 3, for opening or closing such pipe; said door being operated by a lever, 15, and a rod, 16, with a handle, 17, from the cab, and the purpose of the door is to enable the engineer to fully release directly into the smoke-box all the waste gases of all the diverted fire tubes when the engine is idle or'when steam is being gotten up, so that the draft of the fire tubes will not be impairedat such times. The dotted lines at 18 show the door, 14-, open; the arrows indicate the course of the waste gases from the diverted fire tubes through the pipes, jackets and sleeve except that the central arrow over the steam exhaust. nozzle, 13, indicates the course of the exhausting steam.

. In Fig. 2, 3 shows more clearly the shape and position of a semi-circular pipe and the points where part of the fire'tubes of the boiler are connected into it than is possible to be represented in. Fig. 1, at 8.

In Fig. 2, said semi-circular pipe, 3, fol lows around the inner wall of the smoke-box to the positions where it pierces the smokebox on each side thereof, and thence leads into the jackets at the crank-end of the jackets and cylinders, as shown in Fig. 1. Said semi-circular pipe, 3, Fig. 2, is shaped generally like the right and left steam pipes leading from the T-pipe and is built be tween the lateral fire tubes and such right and left steam pipes; and into this semicircular pipe, fire tubes, shown by 2 and .2, are diverted and connected. The number of fire tubes thus diverted and connected is not arbitrarily stated, but is simply indicated, because in differently designed locomotive steam engines the number and diameter of fire tubes greatly vary, and I do not, hence, wish to be confined to the use of a specific number in the invention.

In Fig. 2, 14 is the door for opening and closing said semi-circular pipe, and this door and its purpose and operation have already been described. The course of the W'EISiZG gases in the semi-circular pipe is indicated by the arrows in the latter figure.

The draft created by the action of the steam exhaust nozzle and the sleeve around such nozzle, as shown in Fig. 1, is absolutely necessary to properly draw thewaste gases diverted from part of the fire tubes of the boiler into the jackets, and without the connection or combination of the sleeve, nozzle, pipes, jackets and fire tubes which I have described and shown, it is doubtful if the hot Waste gases could be successfully uitilized for heating the cylinders of a. steam locomotive engine.

I am aware that prior to my invention, jackets surrounding the cylinders of steam engines have been made and that Waste gases have been used to heat the cylinders of stationary steam engines. I, therefore, do not claim such a combination broadly; but

I claim:

1. In a steam locomotive engine, the combination of a semi-circular pipe, said semicircular pipe connected with and leading from part of the fire tubes of the boiler into jackets around the cylinders and which se1nicircular pipe enters said jackets at the crank-end and top of said jackets and cylinders, battles between said jackets and cylinders, a pipe leading on each side of the engine from the front-end and top of each of said jackets into the smoke-box to the steam exhaust nozzle Which pipes are there fitted and termiiia'tcd as a sleeve around the sides of the steam exhaust nozzle, substantially as described.

2. In a steam locomotive engine, a semicircular pipe constructed around the inner wall of the smoke-box, theco'n'ne'ction of part of the life tubes of the boiler into said semicircular pipe, the connection of saidsemicircular pipe into jackets that surround the cylinders at the crank-end and top of said jackets and cylinders, baffles between said jackets and cylinders, a pipe leading on each s de of the engine from the front-end and top of each of said ackets into a junction or union pipe and which union pipe leads into the smoke-box to the steam exhaust nozzle and is there fitted and terminated as a'sleeve around the sides of said exhaust nozzle, a door in said semi-circular pipe at the top 01 said pipe and which door is operated from the cab of the engine by a handle, rod and lever, substantially as described and shown.

EDWARD EVERETT GOTHRAN. Witnesses J osnrn H. Wyn-1n, CHARLES E. MOODY.

maples or this patent may be obtained for five cents each, by addressing the Commissioner or Patents.

Washington, D. 0;

Images