US247614A - cheshier - Google Patents

Description

(No Model.)

G. T.CHE.SHIER.

No. 247,614. `1%1161111111 sept-.127, 11881.

UNITED STATES PATENT OFFICE.

CASWELL T. OHESHIER, OF TRENTON, MISSOURI, ASSIGNOR OF ONE-HALF TO ALBERT L. OHESHIER, .OF SAME PLAGE.

' FURNAoE-DooR.

SPECIFICATION forming part of Letters Patent No. 247,614, dated September 27, 1881.

Y Application led May 23, 1881. (No model.)

To all whom fit may concern Be it known that I, CAswELL T. CHEsHrER, ofTrenton, in the county of Grundyand State of Missouri, have invented certain new and useful Improvements in Furnace-Doors for Locomotive-Engines; and I do hereby declare that the following,r is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, in which- Figure l is a perspective view of so much of the interior of the cab of a locomotive as is necessary to illustrate my invention. Fig. 2 is a bottom plan of the floor of the cab-t'. e., a plan of the under side of the door; and Fig. 3 is a detail View of the treadle and its curved connecting-rod or pitman detached.

Similar letters of reference indicate corresponding parts in all the figures.

My invention has relation to means for opening and closing the furnace-doors of locomotive-engines; and it consists in the combination,wth the door, of a mechanism which is 1ocated underneath the iloor of the cab and operated by a treadle in the door, substantially as and for the purpose hereinafter more fully described.

In firing a locomotive-engine it is of importance to keep the furnace-door closed as much as possible, in order to keep the draft from entering the rebox through the door; and it is the object of myinvention to enable the fire-- man to open and shut the door by operatinga treadle placed in the door of the cab with his foot, so that he need not let go of the shovelful of coal he is about to shovel into the furnace while opening the door, while at the same time the door will shut of itself the moment the engine is fired and he lets go of the treadle with his foot.

In the annexed drawings, A represents the iioor, and B the front side of the cab, facing with one another, and two of which project into the cab, while the lowermost box is underneath its door.

The outer end of the latch-bar a projects, when the door is closed, into the spring-latch,

composed of a rigid lower lip, d, and an upper the floor, has a short arm,f, at right angles,in

the outer end of which is pivoted another arm, E, which connects it with the short arm of a lever, F, having its fulcrum in the bearingplate G, bolted to the under side of the cabioor. The other end ot' lever F is connected on one side to the jointed arm Gr of the curved pitman G, and on the other side by a hooked stirrup, h, to a coiled spring, H, the other end of which is connected by the hook or eye t' to the outer or free end of a stii' spring, I.

The upper end ofthe curved and jointed pitman G G projects up through a slot, g, in the floor of the cab, in which works the treadle K, to the .lower short arm of which it is hinged, as shownmore clearly in Fig. 3 of the drawlngs.

From the foregoing description, takenin connection with the drawings, the operation of my invention will readily be understood. The fireman, holding the shovelful of coal in both hands, places his foot on the treadle, which swings the door open, and after discharging the shovelinto the furnace the door is immediately closed by the operation of the compound springs I and H and the lever mechanism connecting them with the treadle K and pintle D, and held closed until again purposely opened by the spring-latch d e. In this manner no time is lost in opening and closing the door, which remains open at each firing only long enough to enable the fireman to discharge his shovelful of coal into the furnace, thus saving fuel, as well as time and labor. All the parts, with the exception of the trendle, are located below the floor of the cab, where they are out of the Way, and do not in the least encroach upon or interfere with the working of the engine.

Though intended chiefly for locomotives, it is obvious that my invention is applicable also to the furnace-doors of steamboat-boilers and boilers of marine and stationary engines, in which cases some modification in the arrangement of the operating parts may sometimes be found desirable, Without7 however'7 devinting from the spirit of my invention.

I claim and desire to secure byIietters Pntent of the United States- CASW'ELL T. CHESHIER.

Witnesses:

LORENZO RACE, AUGUSTUS J. PARTCH.

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