US414136A - blanceard - Google Patents

Description

2 Sheets-Sheet I.

(No Model.)

v. w. BLANOIHARD.

VALVE.

Patented Oct. 29, 1889.

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No Model.) 2 Sheets-Sheet 2. V. W. BLANGHARD. VALVE.

No. 414,136. Patented 0011.29, 1889.

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.ISI 1 l vi tmeooeo UNITED STATES PATENT OFFICE.

VIRGIL \V. BLANCHARD, OF NIHV YORK, N. Y.

SPECIFICATION forming part of Letters Patent No. 414,136, dated. October 29, 1889.

Application filed April 1, 1889. Serial No. 305 ,623. (N0 model.)

To all whom it may concern.-

Be it known that I, VIRGIL \V. BLANCHARD, of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Valves and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form part of this specification, in which- Figure 1 is a vertical section taken centrally through my improved oscillating valve. Fig. 2 is a section taken through the valve in the horizontal plane indicated by dotted line 0000 on Fig. 1. Fig. 3 is a top view of the ribbed frame which supports the adjustable oil-cup step for the valve-stem.

The object of this invention is to construct an oscillating valve so that it shall be absolutely balanced and practically free from undue friction; and it consists in an oscillating cup-shaped valve having lateral and vertical passages through it, and applied in a stationary cupped guide, also having lateral passages through it and fitted into a valve-box having outlet-passages surrounding said cups and forming communications between the inlet and exhaust chambers of the valve-box, as will be hereinafter clearly described and claimed.

The valve is designed not only for a steamvalve to be used as a cut-off for the inlet and exhaust ports of a steam-engine cylinder, but it is also designed for use with water and air, and for all purposes where a balanced oscillating valve may be found useful.

Referring by letters to the drawings, A designates the valve-box, which is of cast metal and truly bored out in a lathe, and having a removable cap or head D, provided with a stufiing-box D and a gland D This valve-box is also constructed with a stuffingbox 13 at its lower end and with an inlet-passage A, leading into achamber O, and an out let-passage A leading from a chamber 0.

E designates the stem or red of the valve, which passes through boxes D B and bears on its upper end a crank-arm E. The lower conical end of the valvestem is stepped in an oil-cup H, having a cap h, and formed on the upper end of a vertical screw-threaded rod G, that is tapped through an enlargement F of a supp'orting-frame. By turning rod G the valve-stem can be vertically adjusted, and it can then be rigidly fixed by setting home a jam-nut c. The enlargement F is formed on the lower end of a frame, which is composed of vertical ribs F and -a ring F, the latter being firmly bolted to the lower end of valvebox A. ()n the inside of valve-b0x A are cast radial ribs a, which are equidistant and leave vertical channels I), and at certain times establish communication between the chamber 0 above and the exhaust-chamber 0 below the valve. The top of said chamber 12 is a continuous annular flange a, cast on the inner side of the valve-box.

K designates a cupped valve-seat, which is concentrically arranged within the radial ribs to and flang a, and is supported by a rim k on this flange and also upon a flange a at the lower ends of ribs o This cupped valveseat is rigidly fixed in place by screws h and the valverod E passes freely, but steamtight, through a long hub 7t, formed on the bottom of the valve-seat, as shown in Fig. 1. The vertical cylindrical wall of the cupped valve-seat is interiorly bored out true, and through this wall are radial passages s of equal size, which are formed by the vertical ribs or divisions 70, that are tapered outwardly and square-shouldered at k for allowing their inner surfaces to be truly dressed by means of a suitable instrument. The passages s all communicate with passages 1), outside of the circumference of the cupped valve K, as shown in Figs. 1 and 2.

J designates my improved cup-shaped balanced valve keyed on valve-stem E, and constructed with apertures p through its bottom to admit steam between it and the floor of the valve-seat K, and thus balance the valve within this seat. The vertical cylindrical wall of this balanced valve is vertically slotted, forming ribs 9, having square shoulders g and radial outlets s,which can be caused to register with the corresponding outlets .9 through the vertical wall of the valve-seat cup K, as shown in Fig. 2. The external faces of the vertical ribs g are all turned truly, so that they are concentric to the axis of the valve-rod E and accurately match the internal concentric surfaces of the vertical ribs 70 of the valve-seat.

Instead of having oniyone or a few outletpassages through a valve, which would necessitate long throws thereof to open and close said passages or ports, I construct the cylindrical wall of my valve with a great number of lateral outlet-passages that are very narrow, but which, when considered as one passage, gives a large steam-opening that can be opened and closed by a very slight and short oscillation of the valve.

Having thus described my invention, what I claim is 1. The combination of the valve-box having interior upper and lower flanges co a substantially as described, and a removable cup-shaped valve-seat having a rim 7%, and

supported therein upon said flanges and lat-- erally perforated, with a cup-sh aped val velaterally perforated and fitted to said seat, and

the vertically-adj ustable valve-stem carrying said valve, all substantially as set forth,

2. The combination of a valve-box having ribs and flanges a ct a vertical passages I), and a fixed laterally-perforated valve-seat supported on flanges a (1?, with a laterally and vertically perforated oscillating valve, substantially as described.

3. The combination of a valve-box having chambers O C communicating with inlet and outlet ports, an annular series of vertical passages 1) between said chambers, and a laterally-perforated valve-seat to the inside of said passages, with a vertically-adjustable laterally-perforated oscillating valve fitted in said seat, substantially as described.

4:. A valve-box having an inlet leading into a chamber 0 and an outlet leading from a chamber C, vertical ribs, horizontal flanges,

and stuffing-boxes in its heads, in combination with a fixedlaterally-perforated valveseat flanged and cup-shaped, as described, the vertically and laterally perforated oscillating valve, also cup-shaped, and a vertically-adjustable valve-stem, to which said valve is secured, all constructed substantially as and for the purpose specified.

In testimony that I claim the foregoing as my own I afiix my signature in presence of two witnesses.

VIRGIL \V. BLANCHARD.

\Vitnesses:

CHAS. R. CLARKE, 'lHos. M. IVYATT.

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