US786915A - Pump-governing device. - Google Patents

Description

' PAT]E{ 1\T'I `Y.`DAPR.` 1.1, 1905. R. B. MUGOWAN.

PUMP GOVBRNING DEVICE APELIUATION rum) 1111.0. 7, 190s.

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UNITED STATES Patented April 11, 1905.

PATENT OFFICE.

FUIVIP-GIOVEFRNING DEVICE.

SPECIFIC'ATION` forming part of Letters Patent o. 786,915, dated April 11, 1905.

Apphcation led December 7, 1903. Serial No. 184,079.

To all whom, it may con/067%.-

Be it known that I, ROBERT B. McGowAN, a citizen of the United States, residing at Norwood, in the county of Hamilton and State of Ohio, have invented new and useful Improvements in Governing Devices for Pumps, Sec.,

of which the following is a specification.

My invention relates, primarily, togoverning devices for pumps utilized in raising water, compressing air, &c., operating against a head or pressure, which head or pressure is made available as a force to control and regulate the admission of steam or other power operating the motor, and, secondarily, to a governor' device to reduce the pressure of steam, air, gas, or liquids Within the pipe-linein which it is placed, the pressure on the receiving side of the device being utilized as the means to control and regulate the passage of steam, air, gas, or liquids through the device to the delivery side of same, and is in the nature of an impfovement upon the invention shown in Letters Patent. N o. 730,682, issued to me June 9, 1903.

My present improvements consist, first, in an improved construction of the balanced steam throttle-valve and its seat whereby a greater eiciency of the apparatus as a whole in respect to its main functions, and, lastly, in certain detail improvements in the structure as a whole tending' to economy of production,-

compactness, 85e., all as more fully set forth.

Part of the improvements herein describednamely, the throttle-valve and seat-may be used with advantage independently in all constructions where such valves are employed singly-as, for example, in ordinary steam-governors, pressure-regulators, &c.-and doubly, or'two in combination with each other, for alternate action-as, for example, in pneumatic lifts, wherein one is utilized to control the admission and the other to effect the release of pressure necessary to perform the work.

My invention is illustrated in the accompanyingdrawings, in which- Figures l and l2L represent broken sectional views of the valve-chamber and throttle-valve and of the pressure-cylinder and its adjuncts, the two figures illustrating a complete form of my improved governor; Fig. 2, a perspective view of the open cylindrical throttle-valve detached; Fig. 3, a corresponding sectional elevation of the tubular valve-seat detached; and Fig. 4f, an elevation of the frame connecting the valve-chamber and pressure-cylinder, showing the indicating mechanism.

Referring now to the drawings, A designatesv the valve-chamber, containing a throttle-valve B. O designates a yoke-frame consisting of a lower plate c' (constituting the top plate or cap of the` valve-chamber) and an upper plate o2, (constituting a seat for the pressure-cylinder hereinafter described, )these plates being connected byside standards c3 ci into the yoke structure designated. D designates the pressure-cylinder, provided with a piston p, operating therein, attached to the upper extremity of a valve-stem p', extending downward through the plates c c2 between the standards c3 c4 into the Valve-chamber A and attached below to the valve B. These parts, excepting as hereinafter specified, do not differ functionally and butlittle structurally from the corresponding parts of the governor shownVK and described in Letters Patent No. 730,682, heretofore referred to, as to which invention the Apresent one may be regarded as an improvement as to certain features to be described herein in greater detail.

The construction of the valve isv as follows:

It is in the form of a cylindrical shell B', v

(shown in Fig. 2,) connected by radial arms b with an axial socket or hollow stem b', in and to which the valve-stemp' is secu red. The shell is partially cut away circumferentially in zones e z2, whereby steam admitted from all parts of the circumference through the same finds free egress downward through the valve. correspondingly formed, as indicated in Fig. 3, in a hollow extension A2 of the inlet-port A/ of the valve-chamber A. Through the upper and lower walls of the extension A2 is a connecting cylindrical wall a', having partially-vacant zones w m2 opening into the interior spaces of the hollow extension A2 and registering with those of the valve-shell B. The zones of valve and valve-seat may be increased in number to reduce the travel and to effect still more sensitive regulation, as may be required in specific cases. The side wall A3 of the hollow extension A2 is continued around the shell a to form an annular passage for the steam-supply and is provided with an aperture controlled by a direct-seating bypass valve o for admitting steam directly` into the chamber A and thence to the pumpmotor or piping system independently of the valve B. This general construction, as will readily be seen, gives a quick and sensitive action to the throttle-valve B with very slight vertical motion, thereby rendering the entire apparatus economical in construction.

The indicator devices I construct and arrange as follows: I cast or otherwise secure to the yoke-standards c2 c", projecting inwardly, wings c2, having correspondingmarks at the edges, as shown in Fig. 4, indicating open and shut positions of the valve B. Cooperating with these is a circular indicatingplate p2, secu red upon the piston-rod or valvestem p. In its vertical movements between the wings c2, its beveled edge serves as a pointer in relation to the marks thereon to indicate the exact position of the valve B in relation to its seat and may be readily seen from all sides of the apparatus at a glance. The indicator devices beingthus wholly within the framework of the apparatus are protected from injury and take up no extra space.

Further improvements have relation to a condition of service wherein it is desirable to release any pressure within the cylinder for purposes of repacking while the governing appliance may be in service, the relation of the valve to the seat-openings being maintained for such interval by the adjustment of the stop-plates on valve-stem, and, secondly, to avoid the submergence of or contact with the mechanism contained within the pressure-cylinder by slippage past the piston. The construction to this end is as follows: The cylinder D hasat its lower end and beneath the actuating-piston p an inlet-aperture d', connected to the tank or delivery-colui'nn, and an outlet-aperture d 2, connected to a waste-pipe (Z3. The aperture Z2 is governed by a directseating valve e', being a part of the adjustable valve-stem held and guided in a center piece e2 and provided with a terminal hand-wheel.

The construction of the other parts is not materially different from that described in rlhe cylindrical seat of the valve is l my said Letters Patent, excepting that l connect the cylinder l) above the piston l by a by-pipe f with the waste-passage al to take off any accidental leakage past the piston p to avoid corrosion or otherwise affecting the springs or other parts and to prevent any accumulation of pressure above the piston.

The spring-pressure against the back of the piston I? is as described in my said former patent, excepting that to effect a greater range of pressures without sacrificing the sensitiveness of regulation I provide a spring` of lighter tension within the main spring, which is regulated and adjusted by a screw-abutment E according to head or pressure desired to be maintained. The main function of the inner spring referred to is to close the valve B after the release of the pressure resisted by the tension of the main spring, thereby effecting an instant closing of the valve B not obtained in the use of the single or main spring.

In situations where the drafts upon the accumulated supply or head are intermittent and for economical and other reasons it is desired to keep the pump in operation at or above a minimum speed the usefulness of the device will be apparent.

I claim as my invention and desire to secure by Letters Patent of the United States4 l. In a pressure-governor, the combination of a governing-cylinder including an exterior circumferential supply-passage and a double circumferential port or series of ports, a hollow open-ended piston having a corresponding double circumferential port or series of ports adapted to register with those of the cylinder, a by-pass valve for said cylinder, a valve-stein attached to the throttle-valve, and a piston at the upper end of the stem, a pressure-cylinder within which the piston is operable, springs of different tensions embracing said stem and the combined drain and relief connection connecting the end of the pressure-cylinder and the waste-passage.

2. In a governing device of the character described, the combination of a valve-chamber, a yoke-frame connected therewith, a pressure-cylinder, a valve-stein, an indicator-plate carried upon and by said stem, and the indicator-wings upon the yoke-frame.

3. In a governing device of the character indicated, the combination of a pressure-cylinder having a waste-passage, a piston and stem operable in said cylinder, springs of diiferent tensions with the cylinder, andthe combined drain and relief connection connecting the spring end of the pressure-cylinder and the piston end of the cylinder with the wastepassage, substantially as and for the purpose set forth.

4. In a pressure-governor of the character indicated, the governor-chamber having an exit-port, an exterior circumferential suppl ypassage perforated to permit a by-pass to the IOO IIS

exit-port, avalve controlling said perforation In testimony whereof I have hereunto set on the inner wall of said supply passage, a my hand in presence of two subscribing witdouble circumferential port or series of ports nesses.

and a hollow open-ended piston having a dou- ROBERT MCGOWAN. 5 |ole circumferential port or series of ports Witnesses:

adapted to register with those of the cylinder, CHAs. HERBERT JONES,

substantially as set forth. l JosEPI-I R. GARDNER.

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