US693036A - Gate-valve. - Google Patents

Description

Nur.A sesoss.

(No Model.)

THE NDR I5 PETE Witnesses UNITED STATES PATENT 50i-TICE.

' .DAVID LEMLEY, or NEW ORLEANS, LOUISIANA.

GATE-VALVE.

SPECIFICATION forming part of Leners Patent No. 693,036, dated February 1 1, 1902-.

Application tiled March 16, 1901. SerialNo. 511447. (No model.)

To all whom, t may concern:

Be it known that I, DAVID LEMLEY, a citizen of the United States, residing at New Orleans, in the parish of Orleans and State of Louisiana, have invented a new and useful Gate-Valve, of which the following is a speciication.

My invention is an improvement in sliding gate-valves, and has for its object to provide a Simple and efficient form of casingin which the valve is held and designed to work.

Another object is to provide a casing having a sediment-chamber which can be cleaned without causing the water to be turned olf from the pipe when the chamber is opened, the only requirement being to close the valve, which also cuts olf communication between the casing and chamber.

Another and important feature of my invention is the few parts of which the casing is constructed and the manner of locking the parts together, as will be understood from the following specification and claims, reference being had to the drawings, in which- Figure I is a face View of my improvement. Fig. 2 is a longitudinal section of the same, taken on the line 2 2 of Fig. 1. Fig. 3 is a transverse section on the line 3 3 of Fig. l; and Fig. 4 is a plan view of the casing, the valve-stem and guide-rod being shown in section.

In the drawings, A designates the valvecasing, having the usual interior chamber formed therein and pipe connections a, a, formed in the opposite faces thereof. A recess a' is formed in the top, intowhich is designed to it the lower end of a hood B, held in position upon the casing by bolts C C, passing through lugs CL2 and o, formed, respectively, on the sides of the casing and hood. The interior sides of the casing are provided with guideways a3, one side c4 of which is arranged vertically, while the opposite side a5 of each guideway is arranged upon an oblique line forming a tapered guideway, the purpose of which will appear later on. Within the guideways is designed to operate a sliding gate-valve D, whose opposite faces are made to conform to the shape of the guideways. It will be seen that as the valve is lowered to close communication between the connections a c the tapered face of the valve engaging the similarly-arranged face d5 of the guideway causes the valve to be pushed for-- ward against the opposite face of the guideway, thereby causing a pressure of the valve upon its seat and preventing any leakage whatever, and as the valve becomes worn the Wear is taken'up by a further downward movement of the valve, as will be clearly understood. The lower end of the valve protrudes through an opening CLG, formed in thelower end of the casing, which communicates with a sediment-chamber 0,7, that is designed to be closed by a closure-plate E. The outer ends of this plate are provided with apertures c, arranged in alinement with the apertures in the lugs a2 and l), and are adapted to receive the bolts C to hold the closure-plate in position. The hood is provided with a chamber b to receive the valve when the latter is raised to open communication between the connections, the sides of the chamber b being flush with the guideways of the casing, which provides an unobstructed passage for the valve. The upper'end of the hood B terminates in a neck portion B2, having a guideway b2 for the stem D' of the valve and a stuffing-box b3, into which fits the sleeve of a gland F, the latter being held in place'by bolts f.'

It will thus be seen that I provide an eX'- ceedingly simple form of casing composed of but few parts that require only two bolts to hold them in position.

For operating thepval ve I provide a lever Gr, which is pivotally connected at an intermediate point to the upper end of the valvestem and at its eXtreme end is pivoted to a guide-rod H, which is held upon one of the lugs b of the hood.

I do not wish to limit myself to the manner of operating the valve, as any suitable means may be employed.' p'

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

1. In a sliding gate-valve the combination of a casing composed of an upper and lower section each of which having perforated lugs extending laterally therefrom, the said lower section having a recess formed in its upper surface and adapted to receive the lower end of the upper section, thev said lower section also having a recess in its lower end, a plate IOO for closing said recess, bolts for locking the said sections of the easing and plate together and a Valve adapted to operate in the said easing, substantially as shown and described.

2. In a'sliding gate-valve the combination of a casing composed of two sections eaeh of which having perforated ings extending laterally therefrom, one of said lugs upon the upper section being bifuroated, a supporting- 1o rod pvoted to the said bifureated lug, a lever connected to the said rod, and adapted to be connected to a valve operating within the said easing, a plate connected to the lower casing,and bolts engaging said lugs and plate, substantially as shown and described.

DAVID LEMLEY1 Vitnesses:

T. J. FORD, N. 13. TRIST.

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