US703885A - Slide-valve gear. - Google Patents

Description

Nu. 703,885. Patented July I, |902.

S. SH. YUUNGHUSBAND.

SLIDE VALVE GEAR.

(Application filed sept. 4, 1901.)

I (No Model.)

2 Sheets-Sheet l.

C. 5.19@ I n By we Noms Perche en womurno.. wAsmNeoN,

No. 703,885. Patented July l, |902.

S. S. 'YOUNGHUSBANU SLIDE VALVE GEAR.

\App1ice.ton filed Sept.. 4. 1.901.)

2 Sheeis-Sheet 2.

(No Model.)

UNiTED STATES PATENT EEICE.

SAMUEL SMITH YOUNGHUSBAND, OF DARLINGTON, ENGLAND.

SLIDE-VAL SPECIFICATION forming part of Letters Application filed September 4, 1901 To a/ZZ whom, it may concern:

Be it known that 1, SAMUEL SMITH YOUNG- HUSBAND, engineer, a subject of the King of Great Britain, residing at Granville Terrace, Woodlands Road, Darlington, in the county of Durham, England, have invented new and useful Improvements in Slide-Valve Gear for Steam-Engines, of which the following is a specification.

My invention relates to valve-gear of locomotive-engines having coupled drivingwheels, inside cylinders, and outside valvechests; and it consists of a special construction of eccentric sheave and stud for working the expansion -or reversing link of the valve-gear.

In the drawings, Figure l is a side eleva'- tion, and Fig. 2 a part-sectional plan, drawn to a smaller scale, of the valve gear, in which the expansion and reversing link is actuated by an eccentric sheave and stud in combination with the coupling-rod crank-pin of a locomotive having coupled drivers, inside cylinders, and outside valve-chests. Fig. 3 is a sectional detail view of the eccentrics shown in Figs. 1 and 2. Fig. 4 is a slight modication of the eccentrics shown in Figs.

2 and 3. Figs. 3 and 4 are drawn toa larger scale.

The present inventionvis illustrated as applied to work a valve-gear in which motion is transmitted from the reversing or expansion link to theslide-valve through an intermediate lever having a pivotal connection with the die-block of the link, the said lever being connected by'its shorter arm to the valve-rod and suspended by its other arm from an arm or arms on the weigh-shaft and in which the connection with the expansionlink ofthe link-suspension device and of the rods of the forward and backward eccentrics is effected by means of gudgeons carried by a pair of cheek-plates fixed to the expansionlink at either side thereof and at a distance therefrom, as described in the specification of another application for Letters Patent, No. 61,240, filed May 21, 1901.

In the drawings, A is the frame-plate; A', the cylinder; A2, the valve-chest; B, one of the driving- Wheels; B', the other drivingwheel, coupled to B; C, the axle of wheel B; D, the driving-wheel coupling-rod; c, the

VE GEAR.

Patent No. 703,885, dated July 1, 1902.

. Serial No. 74,272. (No model.)

driving-crank on axle C; c', connecting-rod; c2, piston-rod, and a, b are the centers of the forward and backward eccentrics, respectively. i

d is the reversing or expansion link, and e e the cheek-plates fixed thereto by bolts f and -distance-pieces, provided with gudgeons g for the carrier-links h, pivoted at i, and gudgeonsj l for the connection of the forked ends of the forward and backward eccentricrods 7e fm), respectively.

n is the die-block, fitted in the slot of link d; p, theintermediate lever coupled to the die-block at o, fulcrumed at q to the arms r of weigh-shaft s, the short arm of lever p eX- tending, beyond the die-block and being connected at tto valverod u, which is pivoted at u to the slide-Valve spindle u2.

Motion is transmitted to the link d through rods lc m, respectively, from asheave o, eccentric to the wheel-axle, and from a stud w, formed on sheave n eccentrically as regards both the said sheave o and the wheel-axle, the eccentric sheave o being carried by a return crank-arm z and all being made in ono with the coupling-rod crank-pin m. The strap k of rod 7e is secured on the sheave fo through the medium of a liner-ring y, made in segments andfltting in the grooved periphery of sheave o at the same time that a circumferential rib on the liner lits in a groove in the strap, so that the liner makes a shouldered connection With both the sheave and strap. The eye m of the rod m is secured on stud w by a nut w.

In Fig. 4t the stud w and the eye m of the rod mare recessed into the face of the eccentric sheave n.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. VIn a locomotive-engine having coupled driving-wheels, inside cylinders andoutside valve-chests, the combination with the linkmotion and with the coupling-rod shank-pin, of a link-operating mechanism consisting of a sheave eccentric to the wheel-axle, and a stud eccentric both to the sheave and wheelaxle, said stud and sheave being formed in one with a return crank-arm and with the coupling-rod crank-pin,substantially as specified.

IOO

. l operating mechanism consisting of an eccentric provided on one face with a crank-arm secured to the coupling-rod crank-pin, and on its other face with a stud projecting eccenti'ically therefrom, as set forth. f

SAMUEL SMITH YOUNGHUSBAND.

Witnesses:

J AMES JUDGE, H. IRWIN.

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