US554205A

US554205A - George p

Info

Publication number: US554205A
Authority: US
Publication date: 1896-02-04
Anticipated expiration: 1913-02-04

Description

Nrrn STATES GEORGE P. VINCENT, OF COI-IOES, NEV YORK, ASSIGNOR OF ONE-HALF TO FRANK lV. IIORROBIN, OF SAME PLACE.

sTRAic HTWAY erop-VALVE.

SPECIFICATION forming part of. Letters Patent No. 554,205, dated February 4, 1896.

Application led February 23, 1895. Serial No. 539,383. (No model.)

Z" 0 all when?, t may concern:

Beit known that I, GEORGE l). VINCENT, of Cohoes, in the county of Albany and State of New York, have invented new and useful Improvements in Straightway Stop-Valves, of which the following is a full and exact description, reference being made to the accompanying drawings, which form part of this specification, and in which- Figure 1 is a longitudinal section of my valve with the water-way closed; Fig. 2, a transverse vertical section of the valve-casing at the irregular line X X with the nut, part of the screw-stem, wedge-piece, and one of the gates in elevation; Figs. 3, 4, and 5, detached details of one of the gates of the valve; Fig. G, a rear elevation of the other gate; Eig: 7, a like elevation of the same with the wedge-piece in position; Fig. 8, a transverse section of Fig. G at the line Y Y; Fig. 9, a transverse section of Fig. 6 at the line Z Z; Eig. l0, an inverted plan view of the wedge-piece, and Fig. 1l an inverted plan View of the nut.

This invention relates to improvements on the class of stop-valves in which the waterway is governed by means of sliding gates that are fitted to form a water-tight joint with oppositely-located valve-seats; and my invention consists of` the novel construction and arrangement of parts shown in the drawings and described in this speciiication.-

As illustrated in the drawings, A designates a valve-casing including a central valvechamber, 1, having oppositely-located valveseats 2, each provided with an opening or water-way 3 that leads into a nozzle 4L at the corresponding end of the valve-casing, guides 5 at opposite sides of said water-way, a throat G, leading from the upper part of the valvecasing into the valve chamber 1, and an abutment 7 at the lower part of said valvechamber.

The valve for closing the water-way 3 consists of two

gates

8 and 9, whose faces have the form of disks which are fitted to form water-tight joints with the valve-seats 2. The y for a purpose that will be shortly explained herein. Following the latter are inclined planes l2, which, starting from the plane of the back of the gate 8, incline toward the center of the valve-chamber when said gate is in its place in the valve-casing A,`and studs 13 are formed at the lower end of said inclined planes to form a seat for the wedge-piece hereinafter described. The back of the gate 9 is also hollowed, as at 14, to allow the screwstem of the valve to pass loosely therein. A rectangular recess l5 is formed at the lower end of said hollow, and the recesses 11 and l5 are so arranged that when the

gates

8 and 9 are at the lowest phase 'of their movement the lower side of both recesses will range on the same line; but the recess 15 being higher than the same dimension of the recess 11 the upper side of' the recess 15 will be at a higher plane than the upper side of the recess 11, as shown in Fig. l, and this difference in the two recesses is made for the purpose of allowing a rising movement of the gate S to begin before a corresponding movement of the gate 9 occurs. y

Below the recess l5 a hollow 16 is formed in the back of the gate 9, and at the lower side of said hollow a flange 17 is formed for a purposev that will be soon explained. B is a wedgepiece which is approximately semicylindrical in form and is hollowed out, as at 1S, to allow the end of the screw-stem to enter loosely therein, as shown in Fig. 2, the lower end of said wedge-piece being made closed to take against the abutment 7 when the valve has nearly completed its closing movement, and at the upper end of said wedge-piece a flange 19 is formed slightly eccentric to the convex surface of said wedge-piece, said flange being adapted to bear upon the upper face of flange 17 of` the gate 9 when the latter is in its raised position, as shown in Fig. 2, and the portion of said wedge-piece at the two ends of the flange 19 is beveled to form inclined planes 20, which will coact with the inclined planes 12 on the back of the gate 8 to eect the spreading apart of the

gates

8 and 9 in the closing movement of the valve.

C is a nut in which a screw-stem by which the valve is operated is fitted to engage. The body of said nut has a cylindrical form IOO and its lower end is provided with a square head 21 whose sides will fit into the recess 11 in the gate 8 but will enter loosely into the recess 15 of the gate 9 for the purpose hereinbefore stated.

D is a bonnet that forms a closure for the upper end of the throat 6 and also is iitted to receive the screw-stem, and to effect that purpose a stuffing-box 22 is fitted to screw into the top of said bonnet so as to form the upper side of a circumferential groove 23, in

which a collar on the screw-stem is tted to rotate when occasion may require. The stuffing-bex 22 is of a common and well-known construction and for that reason does not require a particular description.

E is the screw-stem by which the opening and closing movements of the gates S and 9 are effected. Said screw-stem passes through the stuffing-box 22, and its outer end is provided with a hand-wheel 2i or other means for rotating it, and it is provided with a eollar 25, which, by being retained in the groove 23, will prevent said screw-stem from attaining an endwise movement. A screw/thread 2G is formed on the inner portion of the screwstem to engage in a corresponding thread in the nut C, and the latter, having its head 21' retained in the recesses 11 and 15, can only receive an up-and-down movement from said screw-stem.

It should be understood that by forming the wedge-piece B with a convex surface where it fits into a corresponding concave in the ange 17 provision is made for allowing the gates S and 9 to automatically adjust themselves to any slight variation from parallelism in the two valve-seats 2 of the easing A.

My invention operates in the following manner: When the gates S and 9 are raised to open the water-way 3, as shown in Fig. 2, the wedgepiece B will be suspended by its flange 19 resting on the flange 17 of gate 9, and the latter will have the upper side of its recess 15 resting on the head 2l of the nut C, and both gates will be loosened from the corresponding valve-seats 2; but under this condition the gate 9 will be lower than the gate S. To close the water-way 3 the screw-stem E must be rotated in a direction to move the nut C downward, and just before the

gates

8 and 9 are in position to fully cover the valve-seats 2 the lower end of the wedgepiece B will take against the abutment 7 and arrest the further descent of said wedge-piece,and the continued rotations of the screw-stem E will cause the gate S to descend, and by the coaction of the

inclined planes

12 and 20 the gates S and 9 will be moved apart to carry the faces of said gates into contact with the valve-seats 2 and form a water-tight joint therewith. By turning the screw-stem E in a direction to raise the

gates

8 and 9 the head 21 of nut C by taking against the upper side of the recess 11 before it takes against the corresponding side of the recess l5 will cause the gate 8 to begin an ascending movement before the gate 9 begins to rise, and thereby the

gates

8 and 9 will be freed from frietional Contact with the valve seats 2. Then by the continued rotations of the screwstem E the gates can be raised to entirely open the water-way 3.

What I claim as my invention, and desire to secure by Letters Patent of the United States, is

1. The combination with a valve-casing, A, provided with oppositely-located valve-seats, 2, each having a water-way, 3, formed therein as herein described, of a valve formed of two separable disks, 8 and 9, a screw-nut, C, provided with a head, 21, which is adapted to engage with both of said disks, and a concave-convex wedge-piece, B, havingon its hollow side-inclined planes,.20, fitted to engage with like planes on the back of the disk S and-at the base of the planes 20-a Iiange, 19, arranged to engage with studs, 13, on the disk 8; the latter having in its back a recess, 11, in which the head 21 engages, the disk 9 having--in its back-a recess, 15, in which the head 21 has a slight lost movement; the back of the disk 9 also having a flange, 17, which forms a seat for carrying the wedgepiece B; the latter being arranged to afford a slight rotative movement of the disk 9, so as to allow the latter to automatically adjust itself to the valve-seat to which it is appropriated; the head 2l being adapted-by the difference in height of the recesses 11 and 15- to slightly raise the disk 8 before the disk 9 begins its rising movement, as herein specified.

2. The combination, with the valve-disks S and 9; vthe latter having in its back a concave depression, 1G, whose sides are parallel with the axial line of said concave, of the concave-convex wedge-piece, B, having the form of a segment of a tube and fitted into the convex depression 16 in such manner that the valve-disk 9 will automatically adjust itself to the valve-seat to which it is appropriated the valve-disk 9 and the wedg'e-piece B being made independently of each other and of the valve-disk S, as and for the purpose specified.

GEORGE P. VINCENT. lVitnesses:

FRANK W. HORROBIN, WM. 1l. Low.

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