US251035A

US251035A - Automatic service-cock

Info

Publication number: US251035A
Authority: US
Publication date: 1881-12-20
Anticipated expiration: 1898-12-20

Description

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Patented Dec. 20,1881.

(ModeL) W. R. FREEMAN.

AUTOMATIG SERVICE COOK.

Wizzeaaads,

ATENT FFrcE.

WILLIAM R. FREEMAN, OF SAN ANTONIO, TEXAS.

AUTOMATIC SERVICE-COCK.

SPECIFICATION forming part of Letters Patent No. 251,035, dated December 20, 1881. Application filed September 29, 1880. (Model) 10 all whom it may concern Be it known that I, WILLIAM R. FREEMAN, of San Antonio, in the county of Bexar and State of Texas, have invented a new and useful Improvement in Automatic Service-(Jocks, of which the following is a specification.

The object of my invention is to furnish an improved automatic valve to form the connection between the water'main or distributingpipe and the service-pipe of a building for regulating the flow and pressure of water in such service-pipe and preventing overpressure,aud yet so constructed that it maybe operated by hand, when desired as, for instance, when it is needed to shut off the water from the main in order to repair or attach branches and fancets to the servicepipe.

The operation of the invention will be easily understood by the following description, with reference to the accompanying drawings, in

p which Figure 1 represents a longitudinal vertical central section of a service-cock constructed according to my present invention. Figs. 2, 3, 4, and 5 are enlarged detail cross sections of the same, taken through the lines 00 .10, y y, z z, and o o, respectively.

Similar letters of reference indicate corresponding parts in the several figures.

The arrows indicate the direction of the water-cnrrent. I

A is the inlet-nipple or short pipe, by which the service-cock is connected to the main pipe under ground, and B the end of the servicepipe connected to the outlet of the service-cock.

O is the valve-case, having a partition for a valve-seat, c, and otherwise constructed as the case of an ordinary check-valve, with the eX- ception that as the vaLve is arranged to close upward an opening is provided in the bottom of the case for allowing the insertion of the valve from the under side, and is then closed by a screw-plug, c.

D is the round vertical valve-stem, fitted to slide water-tight in a stuffing-box, 0 so that its upper end may be accessible from the outside. The upper end of the valve-stem D is threaded to receive and support under ordinary pressure a suitable threaded weight, E, as shown in'Fig. 1. The weight E has upon its upper surface a square nipple, e, or other suitable device or projection, by which it may be grasped with a wrench tram above ground and turned upon the stem 1), to act for the combined purposes of weight and nut. The lower end of the valve-stem D is tlhtedfprefera bly in the cruciform shape shown in the drawings, to form water-channels 61, extending on both sides of the valve-seatpartition from beneath the valve toa suitabledistance above the same. The lower fluted portion of the stem D is gradually diminished by a series of parallel rabnets, forming shoulders or stops at n 0 in the periphery of the stem, and the valve proper consists of a series of flat valve-disks, F G H, of parallel surfaces and diminishing sizes, as shown in Fig. 1, which disks have circular central openings of proper sizes to adapt them to slide upon the respective rabbeted portions of the stem, while leaving the channels d open, the thickness of the disks and length of the rabbeted portions being so proportioned that the disk F cannot fall far enough to catch with its upper surface below the shoulders it, nor the disk G far enough to get its upper surface below the shoulders 0. The disk F has perforations f, and the disk Gr smaller perforations g. The smallest disk H is countersunk in its lower surface to lit and act as valve against' the surface of the knob I as valve-seat. The latter is screwed upon a threaded pin, d, projecting from the extreme lower end of the stem D, and prevents the disks from falling off the stem. The lower end of the threaded pin (1 may be riveted to prevent the knob I from unturning. Bythis construction, the valve-openings, as well as channels (I, being gradually diminished with the respective disks, it will be understood that when properly proportioned the disks F G H will regulate the even flow of the water in the service-pipe, an increased velocity causing one or more of them to rise and proportionally decrease the area of valveopening. Combined increased pressure and velocity would gradually raise the valve until its disks H G F would become closed together and to the valve-seat c, leaving access for the water only through the small areaof the channels d in the central opening of the disk H. Under hydrostatic pressure only the valvedisks F G H will, of course, not act; but when such pressureincreases sufficien tl y to endanger the service-pipe the valve-stem D and weight E will rise high enough to entirely close the valve by bringing all the disks F G H and knob I together, like one solid valve closed against the seat 0. The weight E is, of course,

i, proportioned to the effect of pressure due to the area of the valve-stem D, and to the maximum pressure allowed in the service-pipe with safety.

When it is desired to shut off the water from entering the service-pipes, thisis eifected by simply applying a wrench to the nipple e and screwing down the weight E against the stuffing-box until the stem 1), raised thereby, closes the valve. By unscrewing the weight E and pushing down the stem D the valve is again opened.

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

1 As a new article of manufacture, a serviceccck in which the valve is arranged to close in the direction of the supply-current against a partition, 0, forming a valveseat in the chest 6, and is counteracted by an exterior Weight, E, upon the valve stem D, said weight being proportioned to the pressure atwhich the valve should close, substantially as hereinbetore set forth.

2. A service-cock in which the valve is composed of a series of valve-disks movable between offsets upon a weighted stem, and ar ranged to close in the direction of the supplycurrent, substantially as hereinbefore set forth.

3. The weighted valve-stem D, provided with channels (1 and shoulders at n o, in combination with the valve-disks F G H, movable upon the stem, and the cone-knob I, substantially as hereinbefore set forth.

4. In combination with the threaded outer end of the stem D of a valve, F G H, closing in direction of the supply-current, the threaded weight E, arranged to be operated by a wrench, for the double purpose of weighting the valve and closing it, when desired, substantially as set forth.

WM. R. FREEMAN.

Witnesses:

A. W. ALMQVIS'I, JOHN M. STELLE.