US592197A - Fluid-pressure regulator - Google Patents

Description

(No Model.) a Shets-Sheet 1.

D. 'J. & S. PARMER. FLUID PRESSURE REGULATOR.

No. 592,197. Patented-Oct. 19,1897.

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A TTOHNEKS (No Model.) 3 Sheets-Sheet 2.

. D. J. & S. FARMEB.

FLUID PRESSURE REGULATOR. No; 592,197. Patented Oct. 19,1897.

WITNESSES 4 IN VE N TO/LS 0 5 W DM L Jk ATTORNEY-5 (No Model.) 3 Sheets-Sheet D. J. & S. FARMER. FLUID PRESSURE REGULATOR.

No. 592,197. Patented Oct. 19,1897;

ATEN'I FFTEQ DAVID J. FARMEB. AND SAMUEL FARMER, OF ELIZABETH, NEW JERSEY.

FLUID-PRESSURE REGULATOR.

' SPECIFICATION forming part of Letters Patent No. 592,197, dated October 19,1897.

1 Application filed August 27, 1896. Serial No. 604,083. (No model.)

To all whom it may concern: H j Be it known that we, DAVID J. FARMER and SAMUEL FARMER, citizens of the United States, and residents of Elizabeth, county of Union,and State of New J ersey,have invented certain new and useful Improvements in Automatic Gas-Governors, of .which the following is a specification, reference being had to the accompanying drawings, forming a part thereof, in which similar letters of reference indicate corresponding parts.

Our invention relates to improvements in differential automatic gas-governors adapted to be operated by liquid weight and for controlling the supply of gas to the mains, the object thereof being to provide a device of this character which is serviceable and operative under all conditions of pressure; furthermore, to supply an apparatus adaptedfor obviating the difficulties in adjustment heretofore met with in devices of this character.

- A further object is to supply a governor which is susceptible of differential adj ustment to meet the varied'requirements of gas plants and which will efflciently act under conditions of maximum as well as minimum pressure. p

In automatic governors where fluid weight is employed and transferred from one vessel to another for change of pressure, much difficulty has been heretofore experienced in adjusting the fluid weight to insure prompt automatic change of pressure. In our improved governor prompt automatic change of pressure is brought about partly by means of an adjustable plunger located within the fluidreceptacle and partly by means of a compound-valve seat, as will be hereinafter fully described, and specifically set forth in the annexed claims.

In the accompanying drawings,forming part of this specification, Figure 1 is a vertical sec tional elevation of the governor. Fig. 2 is an end elevation of the upper portion thereof. Fig. 3 is a side elevation of the governor, illustrating a slightly-modified form thereof. Fig. 4 is a diagram in section of the valve and the fluid receptacles, illustrating the relative position of the parts when the valve is open; and Fig. 5 is a similar view with the valve closed.

In the practice of our invention the body I .or bas e ofthe governor comprises a preferably 'globe-shaped'casing A, through which the gas is adapted to pass from a source of supply to the street-mains. The compound-valve seat forming part of our invention is located centrally of this said casing and gas is supplied thereto through the medium of the flanged inlet A and passes therefrom into the mains through the flanged outlet A, these said two openings being adapted for attachment to pipes leading, respectively, from the source of supply and to the mains.

The compound valve comprises two valves B and B, mounted upon a vertical rod C and operated within downWardly-proj ectin g seats D, which form an integral part of the casing A. Surrounding these seats are sliding collars E, adapted for adjustment vertically upon the seats for the purpose of controlling the supply of gas therethrough, whereby the valves may be caused to travel downwardly to variable distances before the maximum supply of gas is allowed to pass into the mains from the source of supply, as will be hereinafter more fully described.

Projecting upwardly and centrally from the upper wall of the casing A is a tube F, through which the valve rod or stem 0 passes. Surrounding this said tubular projection F is a' cock H is tapped into the chamber F for the purpose of drawing off any overflow of water or other liquid adapted for filling the tank G.

Tapped into the casing A is a tube a, which communicates with a globe valve a, and leading from this said valve into the'chamber F is a tube or pipe a whereby gas may pass from the main into the casing A and thence through these said pipes into the chamber F for operating a float I, which is mounted upon the valve-stem C. This said float is cylindrical in shape and the lower end thereof is open, whereby when the tank G is filled with water or other suitable fluid matter an effectual seal for the. gas is provided. For the purpose of lubricating the valve-stern C an oil-tube i is led through the head of the float I.

Securely fitted to the upper edge of the tank G is a dome or cover G and the operative mechanism of the governor is mounted thereon. This said mechanism comprises, primarily, fluid-receptacles J and J, which said receptacles are designated as weight vessels and are adapted to receive the mereuryj or other fluid matter adapted for operating the device, as will be' hereinafter fully described. Of these said fluid-weight vessels,

the centrally located vessel J is mounted upon the valve-stem G, and the vessels J are suspended from cross-rods 7c, forming part of the oscillating wheels K, which said wheels are mounted upon shafts K through the medium of antifriction-rollers 76, whereby the device can be operated with a minimum of friction. These said parts are all located between uprights L, which are securely mou nted upon the dome G2 of the tank G.

The vessels J are preferably closed at each end, and they are suspended from the crossrods k by means of slotted hangers M and adjusting-screws M, which said screws are threaded through the head portions of the hangers and bear against the cross-rods 7; for the purpose of vertically adjusting the vessels J. The liquid-weight vessel J is open at its upper end and has an adjustable plunger J 2 located therein. This said plunger is adjustably secured to the valve-stem O by any suitable means, but preferably by means of a nutj, which engages with a thread j of the valve-stem C. This said nut engages loosely with an aperture in the head of the plunger, whereby the said plunger can be adjusted vertically without having rotary motion imparted thereto. The said vessels J and J are connected to each other by means of flexible tubes N, and these said tubes are supplied with stop-cocks n. for controlling the flow of fluid when desirable.

As a means for supporting the valve-stem and its connected parts, a vertically-adjustable nutc engages therewith. This said nut is provided with projecting arms 0, which bear upon antifriction-rollers c mounted upon cross-rods secured to the wheels K. The upper end of the valve-stem O is provided with a cup-shaped receptacle C, adapted to receive weights for balancing and ad- I j usting the apparatus. \Veight receptacles or troughs O are also suspended from the wheels K by means of rods 0 for a similar purpose.

As a means for setting or properly adjusting the fluid matter within the fluid-receptacles, these said receptacles are each provided upon their bottom surfaces with projections j adapted for engagement with a straightedge, as will be hereinafter described.

In Figs. 1, 2, I, and 5 of the drawings we have illustrated but three fluid-weightreceptacles, but we do not confine ourselves to the specific number thereof. For instance, as illustrated in Fig. 3 of the drawings, two centrally-located vessels J 3 are used, and their plungers J are operated for vertical adjustment through the medium of screws J which are threaded through the head j", covering the vessels.

In the operation of the governor, the movement of the valves is effected or actuated by the float I, which is controlled by the pressure in the service-mains through the pipes a and a In Fig. 1 the governor is shown in position for day service, or when the minimum of gas is being passed through the valves to the street. It will be observed that the vessels J are below the vessel J and they contain all the fluid and sustain the valves B and B in their upward position, whereby a minimum supply of gas is supplied to the street-mains.

\Vhen consumption increases or there is a call for more gas in the district, the pressure is reduced in the mains, which causes the float I to descend by gravity. The weight fluid in the vessels J then begins to flow from the said vessels to the vessel J, and a gradual change of weight of the vessel J causes the valves to descend, whereby an increased voland the pressure therein is increased.

The collars E, surrounding the valve-seats D, may be set so as to cause the valves to drop slowly for either a short or long distance before giving out the full volume or maximum supply of gas, whereby full-weight pressure is not supplied to the mains until the valves are below the lower edges of the collars E, as clearly illustrated in the diagram Fig. 4C, and all the weight fluid is transferred from the vessels J to the vessel J. The valve is then supplied with its maximum weight and full maximum pressure is delivered to the mains.

\Vhen the consumption is diminished and lights are being turned out in the district, the float begins to rise by the back pressure in the mains, and upward movement of the valves will be continued until the maximum pressure in the mains causes the valves to assume the position illustrated in the diagram of Fig. 5, whereby the minimum supply of gas is permitted to enter the mains and the weight fluid is gradually transferred. back to the vessels J.

In order that the advantages of our improvement may be better understood, we will describe the method of putting the governor in to working operation.

After the governor is set up and the working parts are in readiness, the vessels J are supplied with the proper weight of liquid that is necessary to be transferred for change of pressure. The valve (4 is then opened and the gas is passed through the governor to the street and after allowing time for pressure in the mains to settle, as ascertained by the gage. If the pressure maintained is too much for the minimum of consumption, shot or other weight is placed in the receptacles O, or weights may be secured to the rods 0 if desired. This weight is added until the pressure is reume of gas is allowed to pass into the mains duoed as required. After pressure settles,

giving out the minimum consumption, the governor is adjusted by placing a straightedge'on the projecting plate j of the vessel J and on a line with the bottom of the vessel. The straight-edge in length extends to the outer vessels J, which'said vessels are lowered or raised by their adjusting-screws until the surface of .the fluid therein is on a level with the under side of the straight-edge, which represents the bottom of the plunger ve'ssel J When this is done, the governor is adjusted to minimum or day pressure. As soon as night pressure is on and the liquid is transferred from the'outer vessels to the inner vessel, the governor is giving out its maximum volume of pressure. The straight-edge is then placed on the projecting plates which extend from the vessels J and on a line with the bottom of said vessels. The liquid in thecentervessel is then adjusted for the maximum pressure by the simple operation of raising or lowering the plunger J 2 until the liquid is on a line with the bottom of the straight-edge, and the full adjustment is made accurately for auto-' matic use the first night, and no further adjustment is necessary to meet the requirements of minimum and maximum pressure, and it will be observed that the preliminary and finaladjustment is made when the governor reaches its maximum pressure on the first night.

The mechanism we have described for connecting and operating the fluid-weight vessels may be varied if found necessary without departing from the scope of our invention, and we do not confine ourselves to arrangement of the two outside liquid vessels J, as it is obvious that one vessel may be made to encircle the plunger vessel J for carrying the liquid weight to be transferred to said plunger vessel.

Having thus described our invention, What we claim as new, and desire to secure by Letters Patent, is

1. An automatic gas-governor, comprising a plurality of fluid-weight vessels, and means for connecting them to each other and for transferring the fluid weight, a valve, a projecting valve-seat and an adjustable collar thereon, the stem of the said valve having a float thereon engaging with a tank adapted to contain water or other fluid for sealing the gas, and. a vertically-adj ustable plunger mounted on the valve-stem for adj usting' the fluid weight, the said plunger located within one of the fluid vessels; and means for inclosing, supporting and mounting the said parts, for the purpose set forth.

2. In an automatic gas-governor, the combination of a valve and projecting valve-seats,- the seats having sliding collars thereon for regulating the flow of gas, and a float and one or more fluid-weight vessels secured to the stem of the said valve, said vessels having vertically-adjustable plungers therein for adjusting the fluid weight, a plurality of fluidweight vessels communicating with the other said vessels and means for adj ustably operating them, a casing surrounding the said valve and a tank inclosing the said float, substantially as shown and described.

3. A differential automatic gasgovernor comprising a body portion having an inlet thereto and an outlet therefrom, and downwardly-projecting valve-seats therein, havingadjustable collars thereon, and a double valve for engagement with said seats and collars, and a valve-stem which is suspended from friction-rollers located between two revoluble disks or wheels, said stem having a float secured thereto which is located within a tank for sealing the gas, said tank communicating with a receptacle which connects with the outlet portion of the said body, said stem also having a fluid-weight vessel secured thereto with an adjustable plunger therein; and vertically-adjus'table fluid-weight vessels communicatin g with the other said weight vessel, these said vessels being suspended between the said wheels which support the valvestem, whereby the fluid-weight vessels will be alternately raised or lowered for transferring the weight fluid and for governing the supply of gas for the mains, substantially as and for the purpose shown and described.

4. In an automatic gas-governor, a fluidweight vessel having an adjustable plunger therein for raising and lowering the surface of the fluid weight, said vessel being secured to the valve-stem of a gas-governor, combined with fluid-weight vessels for transferring and operating the said parts, substantially as and for the purpose set forth.

5. The combinationin an automatic gasgovernor of fluid-weight vessels having adj ustable plungers therein, secured to the valve-stem of the governor; with auxiliary fluid-weight vessels and means for supporting and adjusting them, substantially for the purpose shown and described.

6; The combination in a gas-governor, of a double valve and double-valve seats, said seats being vertically adjustable, the stem of the said valve having a float thereon, also a' fluid-weight vessel having an adjustable plunger therein, said vessel communicating with adjustable vessels for transferring the fluid weight; With a rock-shaft mechanism for supporting and moving the said parts, substantially as and for the purpose shown and described.

7. In an automatic gas-governor, a fluidweight vessel having an adjustable plunger therein for raising and lowering the surface of the fluid Weight, said vessel being connected to the valve-stem of a gas-governor, combined with fluid-weight vessels for transferring the fluid weight, for the purpose shown and described.

8. The combination with a gas-governor, of projecting valve-seats, said seats being provided with collars or casings surrounding said valve-seats, said collars adapted to be moved up and down on the seats to regulate the flow of gas to the main, substantially as shown and described.

9. In automatic governors where fluid weight is used and transferred from one vessel to another, means for adjusting said vessels in proper vertical relation to each other, said means comprising plates projecting from the bottoms of said vessels, or their equivalents and adapted to be used as supports upon which to apply a straight-edge for adjusting the same in any desired vertical relation to each other, as described and set forth.

10. In automatic governors where fluid weight is used and transferred from the ves-

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