US718720A - Stand-pipe. - Google Patents

Description

No. 718,720. PATENTBD JAN. 20, 1903.

M. M. MOORE.

STAND PIPE.

APPLICATION FILED JULY 15, 1902.

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MOSES M. MOORE, OF CHICAGO, ILLINOIS, ASSIGNOR TO THEODORE W. SNOW, OF CHICAGO, ILLINOIS.

STAND-PIPE.

SPECIFICATION forming part of Letters Patent No. 718,720, dated January 20, 1903.

Application filed July 15, 1902. Serial No. 115,680. (No model.)

To will whom it' may concern:

Be it known that I, MosEsM. MOORE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Stand-Pipes, of which the'following is a specification.

My invention relates to improvements in the construction of railway stand pipes, more especially of the general type exemplified in Letters Patent of the United States No. 547,692, granted to me October 15, 1895, and No. 682,106, granted to me September 3, 1901.

My present object is to provide certain improvements in the construction of valve mechanism at the base of the swinging column with a View more particularly to avoiding undue shock upon the base bya too-sudden cutting off of the flow of water when the valve is closed.

In carrying out my invention I provide a cushioned seat of improved construction for the valve exposed to the water-pressure in such a manner that it will yield under a sudden rise of pressure when the valve is closed and neutralize shock.

Referring to the drawings, Figure 1 is a broken View showing the base portion of a stand-pipein a vertical section, and Fig. 2 an enlarged broken section taken'on line 2 in Fig. 1.

A is a valve-casing forming the base of the stand-pipe structure. In one side of the casing A is an opening a to receive the end of a water-supply pipe B. The opposite side of the casing A is open and fittedwith a removable closing-platein which there is a handhole I), closed bya removable cover I), to give ready access to the interior of the casing when desired. The top portion 0 of the casing is circular, presenting a circular vertical opening 0.

C is the vertical axially-turning tubular column of the stand-pipe, which in practice carries a vertically-swingin g horizontally-extending discharge-pipe portion and other parts which have no direct bearing upon the present invention, but may be seen by referring to my aforesaid Letters Patent No. 682,106.

C is a cup-shaped base portion of the column C, provided on its under side with a bearing projection 01, adapted to rest upon a central bearing projection e in the base of the casing A. In the upper side of the base C is a circular vertical guide-opening d, surrounded by a flange having ears d The column C is formed near its lower end portion with a smooth cylindrical outer surface f, which passes loosely through the guide-opening c of the casing, the joint between the column and casing being rendered water-tight by a gasket or the like g, which does not interfere with the axial turning of the column.

Secured to the lower end of the tubular portion of the column C is a ring C having perforated ears h, corresponding in number and position with the perforated ears or flanges d of the column-base C.

The column C and base C are connected together in rigid relation by means of bolts h, secured at opposite ends in the ears h (1 as shown.

Fitting in the opening (1 of the base C is a vertically-movable disk or valve-seat D, provided with a central opening 2 and other openings t".

In the base C is a plate E, provided with a series of three or more upward-extending lugs E, surrounded by cushioning-springs E on which the disk or valve-seat D rests.

Screwed into or otherwise fastened in the center of the base C is a bolt or post 01 threaded along its upper end portion, where it passes loosely through the openingt' in the valve-seat D. Nuts d on the upper end of the bolt (1 limit the upward movement of the seatD under the upward pressure of the cushioning-springs E Secured upon the upper face of the disk D is a gasket D, having an inclined upper surface It, which forms the annular seating-face for the valve. Around the outer side of the gasket D the seat D presents an annular horizontally-exposed face D for the purpose hereinafter described.

. F is a vertically-movable cylindrical watercolumn-supply valve mounted upon a spider F. The spider is secured at its center to the lower end of a rod F extending downward from a bar or cross-head F which in turn is secured to valve-operating rods F F of the construction shown in my aforesaid Letters Patent No. 682,106. The valve F fits and slides in the guide-ring C the joint between the two being rendered water tight by a washer 72. The lower end of the valve F presents an annular inclined meeting face I, corresponding in shape to the meeting face of the valve-seat.

On opposite sides of the column 0, below the surface f, are antifriction-rollers f, adapted to move upon the under surface of an annular track 9, fastened against the under side of the part c of the casing around the opening 0'. In the side of the column in the position shown is a draining-opening 'm, leading to a short tubular valve-chamber 'm', in which works a vertically-movable cylindrical valve n, presenting a chamber having an inlet-opening n and an outlet 11 The valve 11. is upon a rod n fastened at its upper end to a bracket n on the rod F".

In practice water enters the casing A from the pipe B under an established head of pressure, which usually approximates about seventeen pounds to the square inch. This pressure exerted in the casing against the under surface of the column-base O is sufiicient to raise the base, column, and parts carried thereby, so that the rollers f Will bear against the track g, in which position the parts are sustained while the water-column-supply valve F is closed. To insure perfect watertight closing of the valve F, it should bear against the seat 70 with a certain degree of pressure. The springs E should have a combined resistance capable of sustaining the valve-seat device D under a pressure of, say, seventeen pounds to the square inch exerted by the water upon the annular surface D supplemented by the said pressure exerted by the valve F against the annular seatingface It. In fact I prefer in practice that the springs should be capable of holding the part D against yielding under a pressure of five pounds to the square inch in excess of the normal pressure of the water against the surface D and of the valve against the surface 70. In operation when the valve is closed the sudden stoppage of the flow of water produces an accumulation of preponderating pressure from the water-supply, which unless means are provided to neutralize it produces a shock upon the parts, which in time afiects the same injuriously and causes parts to leak. The construction of the yielding valve-seat described overcomes this difliculty, because when the valve F is closed any sudden rise of pressure exceeding, say, five pounds above normal against the surface D will press the seat down against the resistance of the springs E and permit the blow to spend itself by the passage of a slight additional amount of water through the opening below the valve thus created. It is found in practice that without the cushioned seat D or equivalent neutralizing mechanism a sudden closing of the valve produces a jar creating a decided and pronounced trembling of the entire structure, while with my improved cushioning mechanism this shock is neutralized to a degree which renders it immaterial.

While I prefer to construct my improvements throughout as shown and described, they may be variously modified in the matter of details of construction without departing from the spirit of my invention as defined by the claims.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a stand-pipe, a water-column-supply valve and its seat supported in yielding relation, and means enabling the separation of the seated valve and seat under excessive water-supply pressure.

2. In a stand-pipe, a water-column-supply valve, a yieldingly-supported seat therefor, and means enabling the separation of the seat from the seated valve under excessive water-supply pressure.

3. In a stand-pipe, a cylindrical valve and a seat therefor against which the valve bears at its end to close, the seat having an area exposed to the pressure of the water-supply when the valve is closed and being supported to yield away from the valve when said pressure is excessive.

4. In a stand-pipe, acolumn having achambered base, a vertically-sliding cylindrical valve in the column with means for operating it, a seat for the valve yieldingly mounted in said base and having an area exposed to the pressure of the water-supply when the valve is closed, whereby it will yield away from said valve when said pressure is excessive.

5. In a stand-pipe, a column having a cupshaped base, a vertically-sliding cylindrical valve in the column with means for operating it, a valve-seat, springs in the base upon which said seat is mounted to yield in the downward direction, the seat having on its upper side an annular seating-face for the valve, and an annular horizontally-disposed surface around the seating-face exposed to the pressure of the water-supply when the valve is closed, the seat being supported by its springs to yield away from the valve under excess of said pressure.

MOSES M. MOORE.

In presence of- ALBERT D. BACOI, JOHN H. LEE.

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