US291479A

US291479A - Backbe

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Publication number: US291479A
Authority: US
Publication date: 1884-01-01
Anticipated expiration: 1901-01-01

Description

UNITED STATES ROBlllRl. HUGHES, OF "WATER-FORD, ASSIGNOR TO TltlOMAS A. KNICKEN- PATENT O FICE.

HACKER, or rnor, New roan,

STRAIGHT-WAY VALVE.

SPECIFICATION forming part of Letters Patent No. 291,479, dated January 1, 1824;, g

Appiicaiirn filed September 1, 1883.

[No model.) 7

To all 1071,0121, it may concern.-

Be it known that I, ROBERT HUeuEs, of \Vaterford, in the county of Saratoga and State of New York, have invented certain new and useful Improvements in Straight-Way Valves, of which the following is a full, clear,

and exact description, reference being had to the accompanying drawings, which form part of this specification, and in which Figure 1 is alongitudinal section ofthc valvecasing, with the bonnet and internal parts in elevation; Fig. 2, a transverse section of same,

Fig. 3, a longitudinal section of the valvecasing; Fig. 4, a detached edge view of the.

gate-valves, and Fig. 5 a longitudinal section of a modified form of my valve adapted to re ceive a single gate.

My invention relates to improvements in that class of valves which are controlled by means of sliding gates; and it consists in cpnstructing said valves with gates or disks having conil'orin backs, provided with a central stud or hub, which engages in a loop or stirrup on the lower end of a lifter that is operated by means of a screw-stein or other suitable operating device, the said lifter being also provided with pendulous arms whose-lower extremities, when said lifter is moved downward, are forciblybrought into contact with the inclined surfaces on the backs of the gates, and thereby press the gates apart, so that they will form water and steam tight joints with the valveseats.

As represented in the drawings, A is the valve-casing, which consists ofa central chamber that is provided with two oppositely-arranged nozzles, a, which are perpendicularto the central line of said chamber, and by which the valve can be secured in a line of pipes or other required position. Said valve-casing is also provided with valve-seats a, which may be formed of separate insertible rings, as

shownv in Figs. 1 and 5; or, when preferred,

they may be integral parts of the casing. The central chamber has on each of its side wallsthose parallel to the line of the flow of fluids through the device guide-strips a by which the grooves a" are formed, for the purpose of receiving opposite edges of the valves or gates B. At or near the bottom of said guide-strips,

and extending up between them, inclined planes or camshaped projections a" are formed, for a purpose hereinafter set forth.

The valves or gates B are disk-like in form,

their faces being made flat and their backs coniform. A stem or hub, b, projects from the center of the back of each, as shown in Fig. 4.

The lifter O is provided at its lower end with said lifter and its attached parts; but, when preferred, any other suitable device for iniparting the requisite reciprocating motion to thelifter C may be substituted for the screwstem. Each of the pendulous arms D is provided at its upper end with lateral lugs (Z, and and at its lower end with a head, d, having an outwardly-proj ecting lug, d"; The lateral lugs d are made thin sidewise, for the purpose of facilitating their insertion into the contracted outer throats of the'openings c, and they are elongatedin the opposite direction for the purpose of locking the arms Din said openings. The heads d are arranged to bear against the conical backs of the valves 13, so as to force said valves outward and cause them to come into close contact with the valve-seats a; and, in order to force the lower ends of the arms D to move inwardly and effect the outward movement of the valves 13, the projecting lugs d are arranged to engage with the cam-shaped projections a, of the valve-casing.

The bonnet F is provided at f with the usual internal threaded portion, (not shown in the drawings,) which serves as a nut for the screw stern. E. The said bonnet is also provided with the usual stuffingbox, f, for forminga steam and water tight joint around the said screwstem. The hand-wheel G is secured, in the manner, to the outer end of the screw-stem E, for the purpose of manipulating the latter.

a tight joint with the seats a.

the bonnet F-the lifter 0 being attached to the inner end of said stemthe pendulous arms D are attached to said lifter by raising said arms perpendicularly to the vertical cen ter line of said lifter and slipping the lugs (2 into the contracted outer throats of the openings c, after which the arms D are turned down, to bring the heads (1 against the perimeter of the loop 0, and by so doing the lugs (1 will be locked into the openings 0 and retain the arms D in place, so that they cannot be accidentally displaced. After this is accomplished, the stems b of the valves are inserted in the loop 0 of the lifter, and in this condition the edges of the valves B are inserted in the grooves a? of the casing. Then, after securing the bonnet F to the casing and the handwheel G to the stem E, the device is in condition to be used.

The operation of my valve is as follows: \Vhen the valves B are raised, as indicated by dotted lines in Fig. 2, the parts will hang loose and free, the valves being then wide open to leave a free straight way for the flow of fluids therethrough but when saidvalves are moved downward, just before they reach the position shown by the full lines of Fig. 2, the lower ends of the arms D contact with the camshaped projections a, and thereby the arms D are swung inwardly, so that their heads d will impinge against the conical backs of the valves B, so as to force the faces of the latter to form As shown in Figs. 1, 2, and 4, two of the valves or gatesB are employed to effect the operation above described; but as shown in Fig. 5 only one of said valves is used, and in the latter construction one side of the heads (2 of the pendulous arms must be arranged to bear against the coni form back of the valve B, while the opposite sides of said heads will bear either against the adjacent guide-strips a or against the'nearest face of the central chamber of the valvecasing.

I claim as my invention- -1. In a straight-way valve, the valves or gates B, having coniform backs, and provided with stems b, as herein described, a lifter, 0, provided with a loop or-stirrup, c, in which the stems b of said valves fit loosely, and the pendulous arms D, hinged to the lifter G and arranged to force the valves B into contact with the seats of the valve-casin g A, as and for the purpose herein specified.

2. The combination, with a valve-casing,A, having cam-shaped projections a, and the valves B, provided with coniforin backs, and stems b, as herein described, of the lifter 0, adapted to carry the valve or valves B, as herein set forth, and having pendulous arms D hinged thereto, and means, substantially as described, for imparting a reciprocating motion to said lifter and its subsid ary parts, in the manner and for the purpose herein specified.

, ROBERT HUGHES;

Witnesses:

CHARLES F. SCATTERGOOD, A. T. PHELPS.

Correction in Letters Patent No. 291,479.

It is hereby certified that, in Letters Patent No. 291,479, granted January 1, 1884, upon the npplienmion of Robert Hughes, of Waterford, New York, for an improvement in Straight-Way Valves, the name of the assignee of said invention was erroneously written and printed Thomas A. Kniekenbzwker, instead of Thomas A. Knickcrbcwker; and that the proper correction has been made in the files and records pertaining to the ease in the Patent Office, and should be read in the Letters Patent 00 make it conform thereto.

Signed, countersigned, and sealed this 29th day of January, A. D. 1884.

[SEAL] M. L. JOSLYN,

Acting Secretary of the Interior.

Oountersigned:

15mm. BUTTERWORTH,

Conmrissioncr of Patents.