US267726A

US267726A - Locomotive-engine

Info

Publication number: US267726A
Authority: US
Publication date: 1882-11-21
Anticipated expiration: 1899-11-21

Description

(No Modem H. F. SHAW.

LOGOMOTIVE ENGINE. No. 267,726. Patented Nov. 21, 1882.

N. Pn'zns. piwamumusmpnnf. wnningmn. nA a UNITED STATES PATENT OEEICE.

HENRY F. SHAW, OF BOSTON, MASSACHUSETTS.

LoCoMoT-lvE-ENGINE.

SPECIFICATION forming part of Letters Patent No. 267,726, dated November :21, 1882.

Application filed August 18, 1882. (No model.) l

To all whom 'it may concer/n:

Be it known that I, HENRY F. SHAW, a citizen ot the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Locomotive-Engines, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to the propelling mechanism of locomotive-engines, its object being, while applying the force of the steam in a simple and ett'ective manner and securing unison of revolution of the driving-wheels, to dispense with the parallel rods employed in ordinary locomotives, and much of the weight of the connecting-rods on the wheels, and to more nearly balance the Weight on the drivingwheels.

My` invention consists in the employment of two steam-cylinders upon each side ot' the locomotive, one cylinder above the other, their pistons being connected by suitable rods to a bar, which is pivoted so that it may oscillate,

and in said bar' connected by suitable rods to the crank-pinsV on the driving-wheels.

In the drawings, Figure l is a side view of so much of a locomotive-engine embodying my invention as serves for illustration ot' the same. Fig. 2 is a plan view, the boiler being removed.

It is sufficient for present purposes to refer only to those parts on one side of the engine, the arrangement being similar on both sides, bearing in mind that the crank-pins on the two wheels on either axle are set quartering with reference to each other, as in ordinary locomotives, and as illustrated in Fig. 2. On each side of the engine I place two steamcylinders, A and B, one above the other. These cylinders, may be at that dista-nce apart and located on the frame, and with reference to the boiler, as may be deemed best. There may be one valve-chest, C, for the two cylinders, and the valve therein may he so constructed that it will be adapted for both cylinders, and may be operated by one valve-rod, D. The mechanism for operating the valve is not shown in the drawings. It'may be such as is now in common use. Each piston-rod is secured to a cross-head, one rod, E, tothe cross-head F, to slide on the ways or guides a,

and the other rod', G, to the cross-head H, to slide on ways or guides b.

Between the two driving-wheels, on each side of the engine, a', bar, I, is pivoted. This bar is pivoted midway its length on a pin or trunnion, J, xed to the frame of the engine. To this bar I are pivoted two connecting-rods, L and M, oppositely,with reference to the pivotpin J, as shown. 'Ihe other ends of these connecting-rods are pivoted, one rod, L, to the cross-head F and the other rod, M, to the cross-head H. Also pivoted to the bar I are two other connecting-rods, N and O, one above and the other below the pivot-pin J. The other ends of these connecting-rods are pivoted, one rod, N, on the crank-pin c on the driving-wheel P and the other rod, O, on the crankpin d on the wheel B.

By means of the pistons in steam-cylinders A and B and the connecting-rods L and M the bar I is oscillated, and through the oscillation of bar I and by means of the connectingrods N and O the driving-wheels l?A and R are revolved, and they must revolve in unison without employing any otherthat is, parallel-rods.

Various modifications of the device may be made and still my invention be involved either 'l as to a part or the whole. The driving-wheels may be caused to revolve in unison by the employment of the oscillating bar I and the connecting-rodsN and O,while the Wheels may be driven by other means-as, for instance, by rods connecting their crank-pins, onevor both, with one or two pistons. The connecting-rods N and O may be pivoted nearer to or farther from the pivot-pin or trunnion J than the connecting-rods L and M. The vibration of the connecting-rods L and M being through so short distance, th"`e piston-rods E and G might be extended to the bar Iand connected to the same by other means than said conmeeting-rods, to oscillate said bar and allow for this slight vertical movement.

I claim as my inventionl. In a locomotive-engine, two steam-cylinders upon each side, one cylinder located above the other, the pistons in said cylinders being connected to a pivoted-bar, by which means said bar is oscillated, substantially as and for the purpose set forth.

IOCl

2. In a 1ocomotive-engine,the combination L and M, pivoted bar I, connecting-rods N and of two driving-Wheels, P and R, havingorank- O7 and' Wheels P and R, having crank-pins c pins c and d, connecting-rods N and'O, and and substantially as setforth. pivoted bar I, substantially as and for the pur- HENRY F. SHAW. 5 pose set forth. Witnesses:

3. The combination of cylinders A and B EDW. DUMMER, with pistons and piston-rods, connecting-rods JOSEPH SELIG.