US437831A - Half to william f - Google Patents

Description

(No Model.)

G. L. DOEHNE.

HYDRANT.

Patented Oct.. 7, 1890.

WMM/mow@ @mw i UNITED STATES PATENT OFFICE.

GEORGE L. DOEIINE, OF HARRISBURG, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO IVILLIAM F. VVEITMYER, OF SAME PLACE.

HYDRANT.

SPECIFICATION forming part of Letters Patent No. 437,831, dated October 7, 1890.

Application filed April 1'7, 1890. Serial No. 3118,323. (No model.)

To all whom it may concern: v Beit known that I, GEORGE L. DOEHNE, of Harrisburg', in the county of Dauphin and State of Pennsylvania, have invented certain new and useful Improvements in I'Iydrants; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, formin g a part of this specification, ro and to the letters of reference marked thereon.

This invention relates to that class of hydrants in which the valve controlling the flow of water is connected to or operated by the pipe constituting the discharge or eduction conduit, and has for its object to provide a device of the character mentioned of exceedingly cheap design, not liable to get out of order, and which will shut oif the supply of water automatically without the employment zo of springs or other delicate parts liable to get out of order or be destroyed by the corrosive action of the water.

The invention therefore consists in certain novel details of construction and combina- 2 5 tions and arrangements of parts, all as will be hereinafter described, and pointed out particularly in the claims at the end of this specification.,

Referring to the accompanying drawings,

3o Figure lis a side elevation of a hydrant constructed in accordance with my invention. Fig. 2 is a vertical sectional view of the same. Fig. 3 is a similar view with the valve open.

Like let-ters of reference in the several iig- 3 5 ures indicate the same parts.

I have not deemed it necessary herein to show nor describe the spout or casing of t-he hydrant, as the same may be of any preferred or well-known kind and constitutes no part 4o of my present invention,

In the drawings, A indicates the casing, preferably of tubular section, with a screwthreaded aperture at the lower end for the end of the supply-pipe A', (indicated in dotted lines,) and having at the upper end an annular seat a, above which the casing is screwthreaded internally, as shown. A plug B fits within the casing on the seat d and constitutes the valve-seat for the valve O, mounted 5o on the eduction or discharge pipe D, which latter works through the plug B. The valve C slides in a chamber formed by the cylinder B', preferably secured to or formed integral with the plug, and is attached to the eduction-pipe by a single pin, rivet, or similar connection arranged to permit of a limited independent movement of the valve, whereby it will seat squarely even though the valve face be slightly out of line.

The Valve constitutes a closure for the end of the eduction-pipe and is itself perforated at c outside of the valve-seat, the water being admitted to the eduetion-pipe through perforations d, arranged spirally in the wall thereof and adapted to be successively uncovered as the pipe and valve are pressed downward. Perforations d, it will be noted, are farther apart at the bottom than at the top, and consequently when the valve is first opened but a very slight flow is let through, which Iiow 7o increases steadily as the pipe moves downward, the increased friction incident to the passage of a large body of water through the pipe being compensated for by the opening of a larger number of perforations to a given movement of the pipe, as will be readily un` derstood.

As thus far described, when the eductionpipe is depressed the flow is immediately established through the same; but if the power 8o which depressed the pipe be removed the valve will at once be carried back to its seat by the pressure of and friction of the water and the iiow checked with a pound. N ow,in order to overcome this, a second chamber is provided above the casing A, preferably formed in a cap E, which screws into the top of casing A and holds the valve-seat plug in its place, as shown, and within this chamber works a piston e, rigidly secured to the educ- 9o tionpipe and perforated at f.

Above the piston c is a loose valve-disk F, adapted to prevent the downward passage of water through the perforations f, but to permit of its free upward passage. Thus when the piston-chamber is filled with water the cduction-pipe and valve may be readily moved downward, the water passing readily through the perforations f, but they cannot move upward faster than is permitted by the gradual roe Aleakage of water around the' piston e or through the perforations f, the valve being thereby held open for a long time and all pounding or jarring when it closes is entirely overcome.

In practice the piston-chamber should be filled with water when the device is set up, but there will be sufficient leakage to keep the same full, and even if there is not the escape or drip aperture g for the eduction-pipe is arranged to pass into the same when the pipe is at lowest position, as shown in Fig. 3. WVhen the Valve is closed and the pipe elevated, the drip-aperture is above the cap E and affords a free egress for the wat-er in the eductionpipe, overcoming all danger of the same freezing and splitting the pipe.

From the above description it will be seen that all the fittings are of the simplest and cheapest character, requiring little, if any, special machinery in their production, and may be assembled and placed in working orderby unskilled labor.

Having thus described my invention, what 1. In a hydrant'of the character specified, the combination, with the movable eductionpipe, the valve on the end thereof, and the piston having upwardly-.opening valves therein mounted thereon above the valve, of the Valve-casing communicating with the supplypipe, the valve-seat in said casing, and the piston-chamber above the same, substantially as described.

2. In a hydrant of the character specified, the combination,` with the movable eductionpipe having the valve on the lower end and the valved piston above the valve, of the valvecasing communicating with the supply-pipe, the valve-seat in said casing, the piston-chamber above the Valve-casing, and the drip or vent opening in the eduction-ppe communieating with the piston-chamber at one point in its movement, substantially as described.

3. In a hydrant such as described, the combination, with the movable eduction pipe having the perforated valve on the lower end and having the perforations arranged successively above said valve, of the valve-casing having the plug therein with the annular valve-seat contacting with the valves inside the line of the perforations therein, and the cylinder in which the 'Valve works, substantially as described.

4. In a hydrant such as described, the combination, with the movable eduction pipe having the valve mounted thereon at the lower end and the perforations therein above the' valve, of the valve-casing, the piston-casing above the valve-casing, the vent or drip opening adapted to open into the piston-casing when the valve is open and above the casing adapted to be covered by the plug through whichthe pipe works, the perforated piston Working in the piston-chamber mounted rig-v idly on the pipe, and the lloose valve'resting on said piston, substantially as described.-

GEO. L. DOEHNE. Witnesses:

THOMAS DURANT, ALEX. S. SrEUARr.I

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