US247997A - eideb - Google Patents

Description

(o Mdel.) l

G. H. REYNOLDS 822 T. J. RIDER.

VALVE GEAR FOB. DIRECT 4ATNGr ENGINES.

10.24.1997. Patented oct. 4,1881. Y

K Mlnesses w97 i WQMQYM .auf a `7 UNITED STATES- PAT'I-LNTv OFFICE.

GEORGE H. REYNOLDS AND THOMAS J. EIDER, OE NEW YOEK, N. Y.

-VALVE-GEAR FOR DIRECT-ACTING ENGNES.

, SPECIFICATION formingpart of Letters Patent No.247,997, dated October 4, 1881.

- applicati@ ait-, 1 July 5,1'Ss1. (No model.)

To. all whom it may concern Be it known that we, GEORGE H. REYNOLDS and THOMAS J. RIDER, both of the city and -county ofNeW York, in the State ofNew York,

have invented certain new and useful Improvements in Valve-Gear for Direct-Acting. En` gines, of which the following is a specificationf Our invention relates to direct-actin g engines, such as are embodied` in steam-pumps, but which may be applied to other purposes, and in` which the auxiliary valve is turned partly round or oscillated at each'stroke ofthe piston to admitsteam to operate the main valve. An example of such an engine and valve-gear is shown in our Letters Patent numbered 237,323, and dated February 1, 1881. In the engine represented in said patent, and in other engines of the' same class, the valve-rod is turned or oscillated by means of an arm projecting from the piston-rod and acting upon inclines upon the valve-rod, or on a yoke or bar attached thereto near each end of the pistonls stroke. i

The object of the presentinvention is to obviate an objection which is found in practice to exist in the construction of the parts as represented in the aforesaid Letters Patent, consisting in the cutting of grooves in the valveoperating arm by its Working during a portion of its stroke on the edge of the yoke, and also to enable the inclines and the parts .which act upon them to be properly oiled and removed, for the purpose of cleaning them When the oil becomes gammed upon them, without disturbing other parts of the valve-gear.

To this end it consists in a novel construction of the yoke and of the valvearm, and a novel arrangement of anti-friction rollers on the said arm, as hereinafter described, whereby the above objection is overcome.

In the accompanying drawings, Figure l. represents a longitudinal section of a portion of a steam pump embodying our invention, and Fig.2 represents a transverse section upon the dotted line a0 Fig. l, of the piston-rod and the valve-rod and its yoke, and an elevation of the piston-rod arm.

Similar letters of reference designate corresponding parts in both figures.

A designates the head and a portion of the steam-cylinder of the steam-pump, and -B des- Ais connected with the steam -cylinder by a trunk, C, in the usual Way.

D designates the piston-rod, to which the steam and water pistons are attached. and E represents a portion of an auxiliary valve and steam-chest, which may be of any desired construction, and theframe of which receives an oscillation or partial turning, from the valvejecting from the water cylinder..

H designates a vertical arm, which may be rigidlysecured to the piston-rod D in the desired position by means of a set-screw, a, or otherwise, and which has near-'its upper end an eye, b, through which the valve-rodFis inserted.

I designates a yoke, having lugs c at each end, which are fitted to the valve-rod, and after said yoke has been adjusted into the desired position on the rod it may be rigidly secured thereto by means of set-screws d in the lugs c, or otherwise. The yoke I is slotted for the greater part of its length, and the top of the arm H projects upward through and above said yoke and. can reciprocate freely therein. Upon the top of the yoke I are two inclines, e e, the one on one side being near one end of the yoke, and the one on the other side being near the other end of the yoke.

Through the arm H, above the valve-rod F, is inserted a transverse pin, f, and .upon said pin, on each side of the arm, are loosely fitted i ignates the head ofthe Water-cylinder, which -rod F, which is guided in a standardG, prorollers g, which are free to rotate, and which are immediately above the two sides of the yoke. As the piston-rod and its attached arm H are reciprocated the rollers g come alterynately in position to, and do bear upon,the inclines e, thus turning or oscillating the yoke in onedirection or the other,in accordance with the direction in which the arm is movin g, and

thus effect the desired turningor oscillation 0f the valve E.

The rollers g constitute,in effect, projections ou the arm H on changing the sides of the yoke 5 but the rollers are preferable to. rigid projections, because they lessen the friction upon the inclines e.

By our invention the cutting or excessive Wear of the yoke and the arm which actuates it are obviated, and the desired motion is trans- IOC mitted to the valve-rod in an easy and positive manner.

Ourimproved construction is advantageous for other reasons. The inclines upon theyoke are in a plane which is approximately horizontal, only varying slightly therefrom at any time, and hence oil which is applied to the inclines will remain upon them and will not run of, as it would it` the inelines were in planes approximately vertical.

Another advantage is that in case the rollers become guinined up with oil they may be readily removed for cleaning bysimply taking ontv the screws which retain them in place, and withoutdisturbingotherpartsofthevalve-gear. Another advantage is thatany transverse strain exerted upon the yoke, and through it upon the valve-rod, is in the direction ofthe length of the arm H, and is therefore transmitted to the piston-rod, which, being` of large size, will not be aiccted by such strain.

IVe are aware that a valve-gear has been made in which the valve-rod has a slotted yoke arranged below and attached to it, and is oseillated byan arin projecting from the pistonrod and working in the slot in said yoke, said arm being provided with afriction-roller for bearing on the yoke. We do not therefore claim lthis as of our invention.

What we claim as our invention, and desire to secure by Letters Patent, is-

1. In a direct-acting engine, the combination,

with the piston-rod and a valve and rod adaptA ed to be oscillated or turned, of a yoke attached to the valve-rod and having inelines upon opposite sides, and an arm projecting from said piston-rod and having horizontal projections upon opposite sides above the center ot the valve-rod, the under sides ot' which are adapted to act upon thc inclines on said yoke, substantially as and for the purpose specified.

2. Inadireet-actingengine,theeombination, with the piston-rod and a valve and rod adapted to be oscillated or turned, of a yoke attached to said rod and having inclines on its upper surface, and an arm projecting from said piston through and above said yoke, and provided` with horizontal projections on opposite sides and above the center ot' the valve-rod, which overhang the sides ot" the yoke and rare adapted to act upon the inclines thereon, substantially as and for the purpose specied.

3. In adirect-acting engine,the combination of the piston-rod D, the valve E, the rod F, the yoke I, having inclines ec,and the arm H, projecting through said yoke, and provided above the sides ot' said yoke and above the center ot' the valverod with the transverse pin fand rollers g, substantially asspeeitied.

GEO. H. REYNOLDS. THOS. J. RIDER. Witnesses: .f

T. J. KEANE, ED. GLATZMAYER.

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