US443782A - Henry p - Google Patents

Description

(No Model.)

H. P. MORGAN.

` VALVE GEAR. No. 443,782.

Patented Deo. 30, 1890.

NITED STATES IIENRY P. MORGAN, OF SOUTH NORIVALK, CONNECTICUT, ASSIGNOR TO y TIIE NORVALK IRON IVORKS COMPANY, OF SAME PLACE.

VALVE-GEAR.

SPECIFICATION forming part of Letters `Iatent No. 443,782, dated December 30, 1890. Application led September l, 1890. Serial No. 363,609. (No model.)

To all whom t may concern:

Be it known that I, HENRY I. MORGAN, of South Norwalk, in the county of Fairfield and State of Connecticut, have invented a new Improvement in Valve-Gears for Steam-Engines and I do hereby declare the following, when taken in connection with accompanying drawings and the letters of reference marked thereon,to be a full, clear, and exact description of the same, and which said drawings constitute part of this speciiication, and represent, iu-

Figure l, a view in vertical longitudinal section through the valve-chest, valves, and valve-gear of an engine of the Meyer type. Fig. 2 is a view in vertical transverse section on the line of Fig. l. Fig. 3 vertical longitudinal section of a modified and much simpler form which my invention may assume.

My invention relates to an improvement in valve-gears for steam-engines, and more particularly to that class of valve-gears generally known as the Meyer valve-gear, the object being to dispense with the stuffing-box now used and to make the connection shorter than as heretofore constructed.

lVith these ends in view my invention consists in a valve-gear having certain details of construction and combinations of parts, as will be hereinafter described, and pointed out in the claims.

As shown in Figs. l and 2 of the drawings, the outer end of the valve-rod A, upon which the cut-off valves B B are mounted, is made square in transverse section and entered into the inner end of a square longitudinal opening C, formed in a rotatable horizontal bushing D, mounted in a head E, the inner end whereof is reduced in diameter and fitted into a hub or sleeve F, cast integral with and projecting from the valve-chest G. A hand-wheel I-I, rigidly secured to the outer end of the bushing, is provided for turning the same, and hence the cutoff-valve rod, whereby the same is caused to vary the location of the valves B B to the ports I I. The inner end of the said bushing is provided with an annular shoulder J which is ground to tit against and form a steam-tight joint with the extreme inner end of the head E, the said shoulder being drawn against the end of vthe head by is a view in means of a small clamping-wheel K, located n outside of the hand-wheel and screwed onto the threaded outer end of a plug L, projecting through the hand-Wheel and threaded into the outer end of the rotatable bushing and coupled therewith by means of a pin M, a washer N bearing at its edges upon the hub of the hand-wheel, forming a point of purchase for the clamping-wheel to work against in pulling the bushing longitudinally outward, and hence drawing its shoulder against the end of the head. The pressure of the steam in the valve-chest against theinner end of the bushing also forces the shoulder thereof against the inner end of the head. An index O, sweeping over a graduated surface O', indicates the position of the valves B B inthe chest G, and is thereto mounted upon the same center with a pinion P, meshing into threads P,cut in the outer periphery of the bushing.

In using myimproved device the clampingwheel is first turned to relieve the friction between the shoulder of the bushing and the fixed head, after which the bushing, and hence the'valve-rod, is turned by the handwheel until the index shows that the valves have been brought into the positions desired, when the clamping-wheel is again operated to draw the bushing firmly against the end of the head. The joint formed between the said shoulder and head is steam-tight and no steam canpass it, nor can any steam pass out through the central opening of the bushing, as that is closed by the plug, whereby the Yuse of a stuffing-box Vis dispensed with. The compactness of my improved device is self evident. By disconnecting the head from the hub or sleeve of the valve-chest the whole adjusting mechanism maybe removed as a unit from the chest, and herein lies obvious convenience.

Instead of making the outer end of the valve-rod square in transverse section and forming an opening of corresponding shape in the bushing, both the said end of the rod and the said opening maybe made hexagonal or of any other form which will insure their turning together, or they may be coupled for rotation together in some other Way-such, for instance, as by a feather. The particular coupling between the bushing and the plug may also be changed, as desired. Other means than the clamping-wheel may be eu1- p loyed for locking the bushing against rotation; but, as the said wheel as herein arranged also tightens the steam-joint, it is a desirable construction.

A simpler embodiment of my invention, and one particularly adapted for application to small engines, is shown by Fig. 3 of the drawings. This device consists simply of a bushing P, provided at its inner end with an annular shoulder P,and is inserted from the inside of the valve-chest Q into a hole Q, formed in one of the heads Q2 thereof, the said head being provided with a raised seat Q3, against which the shoulder P is pressed by the pressure of the steam in the valvechest, from which, however, the steam cannot escape, as the outer end of the bushing is closed. The outer end of the valverod R is squared and enters an opening P2 of corresponding form in the bushing, whereby the rod and bushing are coupled for rotation together, but leave the rod free for independent longitudinal movement. As before mentioned, the pressure of the steam within the valve-chest holds the shoulder of the bushing against the seat on the head and forms a tight joint between them, and the friction of this pressure will prevent the bushing from turning, dispensing with independent locking devices for the purpose. When desired to adjust the valve, the rod is turned by rotating the bushing by turning its outer end by hand. The remarks heretofore made about coupling the rod and bushing for rotation together apply as well to this modified construction. I would therefore have it understood that I do not limit myself to the exact construction and combination of parts herein shown and described, but hold myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of my invention.

I have represented the valves as joined by a right and left hand screw-threaded connection, but have not described the same, as this peculiar construction is the invention of another and forms 11o part of my invention.

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

l. The combination, with the verbe-chest and valve-rod of a steam-engine, of a bushing having its outer end closed and provided at its inner end with an ann ularshoulder which co-operates with another part of the valve-chest to form a joint, the bushing and valve-rod being coupled for rotation together, but free forindependent longitudinal movement of the rod, substantially as described.

f2. In a cut-oif-valve gear, the combination, with the valve-rod, of a rotatable bushing coupled with the rod for rotation therewith, and a head in which the said bushing is mounted and with which it co-operates to form a steam-tight joint, substantially as described.

3. In a cut-otf-valve gear, the combination, with the valve-rod, of a rotatable bushing coupled with the rod for rotation therewith and provided at its inner end with a shoulder, and a head in which the bushing is mounted and with which the shoulder thereof co-operates to form a steam-tight joint, substantially as described.

et. In a cut-off-valve gear, the combination, with the valve-rod, of a rotatable bushing coupled with the rod for rotation therewith, a head in which the bushing is mounted and with which it forms a steam-tight joint, and means for locking the bushing against rotation, substantially as described.

5. In a cut-oif-valve gear, the combination, with the valve-rod, of a rotatable bushing coupled with the rod for rotation therewith, a head in which the bushing is mounted and with which it forms a steam-tight joint, a hand-wheel secured to the outer end of the bushing, and means located outside of lthe hand-wheel and operating against the same for drawing the bushing outward, substantially as described.

6. In a cut-olfvalve gear, the combination, with the valve-rod, of a rotatable bushing coupled with the rod for rotation therewith and provided at its inner end with a shoulder, a head in which the bushing is mounted and having its inner end adapted to form a steam-tight joint with the said shoulder, a hand-wheel secured to the outer end of the sleeve for rotating the same, a plug located in the outer end of the bushing and projecting through the hand-wheel, a clampingwheel mounted on the outer end of the plug, which is threaded, and a washer interposed between the two wheels and forming a point of purchase for the latter in pulling the bushing outwardly to draw the shoulder against the end of the head and thus lock the bushing against rotation and form a steam-tight joint, substantially as described.

7. In a cut-ot-valve gear, the combination, with the valve-chest, of a head removably attached thereto, a rotatable bushing mounted in the head, a cut-olf-valve rod coupled with the bushing for rotation therewith, and means supported by the head and applied to the bushing for rotating the same, whereby by disconnecting the head the entire mechauism may be removed as a unit from the valve-chest, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

HENRY I. MORGAN.

Vitnesses: Y

EBENEZER HILL, GEORGE F. BEARSE.

IOO

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