US523900A - William b - Google Patents

Description

(No Model.)

W. B. MASON. PUMP REGULATOR.

No. 523,900. Patented July 3.1, 1894.

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UNITED STATES- PATENT Enron.

WILLIAM BNMASON, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE MASON REGULATOR COMPANY, OF SAME PLAOE.

PUMP-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 523,900, dated July 31, 1894. Application filed July 11, 1893. Serial No.480,125. (No model.)

To aZ Z whom it may concern:

Be itknown that I, WILLIAM-B. MASON, residing 1n Boston, in the county of Sufliolk' and State of Massachusetts, have invented an Improvement in Pump-Regulators, of which the followlng description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention relates to a pump regulator especially designed and adapted to be used in connectlon with the pump now commonly employed in hydraulic elevator systems.

This invention has for its object to provide a sensltively acting regulator responsive to substantially slight variations in the pressure of the fluid employed to actuate the elevator. In hydraulic elevator systems as now water. The pump referred to, in some instances, is actuated by steam and in other instances by means of an electric motor.

My lmproved regulator is capable of being adapted, with very slight changes as will be described, to be used to govern the action of the pump both when driven by steam and when driven by an electric motor. When the electric motor is employed to drive the pump, it is desirable that the motor should not be stopped when the fluid pressure has reached constitute the icy-pass valve, and in order that the invention may be clearly understood, I will specifically describe hereinafter, the

construction and operation of the'regulator when so used.

The main valve of the regulator, preferably made as a balanced double seated valve,

is connected to and operated by a piston, located in a cylinder provided with a water inlet port communicating with a valve chamber or chest, in which is located a valve for the said piston, and' which will be hereinafter referred to as the auxiliary valve, the

valve chest being in communication with the vfluid-containing-tank through a diaphragmcontaining chamber. The diaphragm contaming-chamber has located in it a dia- I .phragm actuating a stem or rod, which, in

accordance with my invention, acts upon a weightedlever, to which the auxiliary valve" of fluid to the piston cylinder so as to cause the fluid to act upon the said piston in a direction to open the main valve of the regulator, when the fluid pressure equals or ex- .ceeds a predetermined'point, in which instance, the main valve of the latter is included in the by-pass for the pump. The auxiliary valve referred to, may also be constructed as will be hereinafter described to cause the fluid to move the piston in opposite directions to positively open and close the main valve of the regulator according to the fluid pressure in the tank. In this latter instance, the regulator controls the admission of steam to the steam chamber of the pump. These and other features of my invention will be pointed out in the claims at the end of this specification.

Figure 1 representsin elevation and section a pump regulator valve embodying my invention and provided with an auxiliary valve constructed so as to enable the regulator to be used on a pump driven by electricity, and

the top plate a of the fitting, and through astuffin g box a and head a of the cylinder A,

provided with a piston a to which the opposite end of the valve rod of is connected.

The cylinder A has secured to or forming part of it a valve chamber or chest b,.com-

municating with the cylinder A, as herein shown, through the ports 19' b the said valve chestbeing further provided as shown in Fig. 1 with ports I) b communicating with an exhaustport or passage b The valve chest b,

as shown in Fig. 1, has located within it a Valve stem b", sh own as provided with two disk valves b b controlling the port b and like disk valves b Z1 controlling the port b as will be described. Betweenthe ports 1) b the valve chest b has communicating with it.

a fluidinlet port orpassage 11 also connected to a diaphragm-containing-chamber B above the diaphragm 0 located therein. The diaphragm 0 acts on a stem,rod or projection c, which is herein shownas firmly secured to 1 the said diaphragm and which is extended through the lower part or wall of. the said chamber, and for the best results is made V- shaped atits end to form a knife edge, which co-operates with the bearing plate or piece 0 herein-represented as dove-tailed into the lever 6 provided with the usual weight 0 and in accordance with my invention, fulcrumed on the knife edge 0 on an upright a represented as erectedfrom the topplate a of the fittingA. The knife edge 0 preferably engages a hardened piece or surface a represented as dove-tailed into the lever 0 The bearing surfaces 0 c are and preferably will be made-of hardened steel.

The valve stem 1) of the auxiliary valve is extended through a suitable stuifing box (1 and is directly connected to thelever c to be actuated thereby, it being herein shown as secured to the said lever by the screw d. The diaphragm-containing-chamber B is provided with a fluid inlet pipe d which inpractice is connected to the tank or vessel containing the fluid employed to actuate the elevator. The regulator, when constructed as above described, is designed to be used to control the action of a pump, when the latter is driven by an electric motor, and in this instancethe fitting A is included in the by-pass for the pump, the inlet port or pipe a being connected to one end of the pump cylinder and the outlet pipe or port a being connected to theother end of the said pump cylinder. When thus used, the main valve (1. is noror arm of the weighted lever 0 thereby raising the long arm of the said lever upward and moving the stem b of the auxiliary valve 1n substantially the same direction indicated by arrow 20, so as to out off communication between the inlet. port or passage band the port b, and establish communication between thevalve chest and the port 12 so that the fluid from the diaphragm-containing-cham- .ber B passes through the passage 11 into the .valve chest 12 and then past the valve b and into the cylinder A below its pistona thereby moving the piston a in the direction indicated by arrow 20 and lifting the main valve 0, from its seat, thus establishing communication between the pipe or port a and; the "pipe or port a, and permitting thezpump to be operated without exerting strain upon-the. motor, the pump in this instance'being. cut off from the fluid-containing-tank by the usual :check valve, not herein shown.

When the auxiliary valvestem b is raised as just described and the port 12 out oif from the fluid inlet port or passage 13 by the valve 11 communication is established betweenithe port b and the port 1) connecting the upper portion of the valve chest with the exhaust passage 1'), and at the same time, the valve 12 is moved so as to cutoif communication between the port b and the exhaust passage b. As the piston a is moved in the direction of arrow 20, the fluid in the cylinder A above the said piston is forced through the port 11 past the valve b into theupper portion of the valve chest, thence through the port 12 into the exhaust passage 12 When the fluid inthe tank or vesselfalls below a predetermined amount, the pressure is reduced upon the diaphragm c audis overcome by the weight c, which moves-the long arm of the lever c in a direction opposite to that indicated by arrow 20, that is, in the direction indicated by arrow 21, thereby moving the auxiliary valve stem downward intothe position shown in Fig. 1, so as to cut Off communication between the fluid inlet passage b and the port b and establish communication between the passage 1) and theportb', and at the same time establish communication between the port 12 and the exhaust port 12 the valve 12 being. moved so as to open the communication between the port I) and the l exhaust passage b while the valve 12 is closed to cut off communication between theport I) and the port 12 By pivoting the Weighted lever c on the knife edge and acting upon the short arm of the said leverby the knife edge 0 on the diaphragm stem 0, the said lever and its connected auxiliary valve are rendered very sensitive and respond to slight changes in fluid pressure upon the diaphragm 0, thereby rendering the action of the main valve a responsive to slight changes in pressure of the actuating fluid.

I have thus far described the action of the regulator when used in connection with a pump driven by an electric motor, but I do not desire to limit my invention to this par; ticular use, as it is equally well-adapted, with a slight change in the construction of the auxiliary valve as will now be described, to be used in connection with a pump driven by steam. It will be noticed-that when the main valve a is employed to control the by-pass for the pump, the said main valve is opened when the pressure of the fluid employed to actuate the lever equals or exceeds the predetermined point. When the regulatoris employed in connection with a pump driven by steam, the action of the main valve is the reverse of that described, namely, the said valve is closed when the fluid pressure equals or exceeds the predetermined amount, so as to render the pump inoperative at such time. To accomplish this result with the regulator herein shown, the auxiliary valve stem is provided with but two valves which are arranged on the said stem in such manner as to open one port as b and close the other port as b when the pressure of the fluid equals or exceeds the predetermined point. This construction is shown in Fig. 2 and the operation of the auxiliary valve shown in Fig. 2 may be briefly described as follows:-As

shown in Fig. 2, the valves on the auxiliary or passage Z2 and the port 12 at the same time cutting off the port I) from the fluid inlet b and establishing communication between the port I) and the exhaust passage b through the port 12 The fluid admitted into the cylinder A below the piston a moves the said piston in the direction indicated by the arrow 21 and opens the main valve a the fluid in the cylinder A above the valve a being forced out through the port b into the valve chest above the valve 6 and through the port b into the exhaust passage b When the pressure of the fluid has again reached the predetermined amount, the weighted lever c is moved upward and the auxiliary valve stem is moved in the direction indicated by arrow 20 so as to establish communication between the port or passage b and the port b, and connecting the port or passage 11 with the exhaust passage 19 In this case, the fluid Instead of the particular form of diaphragm herein shown, I may employ any other wellknown equivalent form, such, for instance, as a piston movable in a cylinder and having its piston rod constituting the stem 0'.

I claim- 1. In a pump regulator, the combination with a main valve, a piston connected thereto, a cylinder for said piston, a valve chest communicating with said cylinder, a fluid inlet for said valve chest communicating with a diaphragm-contaming-chamber, a diaphragm in said chamber actuated by the same fluid which acts on the said piston, a stem or rod actuated by said diaphragm, an auxiliary valve in the said valve chest controlling the admission of the diaphragm actuating fluid into the said valve chest, and a lever acted upon by the said diaphragm stem and to which the stem of the said auxiliary valve is directly connected to move in substantially the same direction in which the said lever is moved, substantially as described.

2.. In a pump regulator, a fitting provided with a valve seat, a main valve located in said fitting, an actuating piston for said main valve, a cylinder for said piston provided with ports b 19 a valve chest communicating with the said cylinder through said ports, a valve stem provided with valves cooperating with said ports, a fluid inlet passage communicating with the said valve chest between the said ports, a diaphragm chamber into which the fluid which actuates the said piston is admitted, a diaphragm in said chamber acted upon by the same fluid which actuates the said piston, a stem or rod actuated by the said diaphragm, and a pivoted lever acted upon by said stem and to which the auxiliary valve stem is directly connected to move in substan-' tially the same direction in which the said lever is moved, substantially as described.

3. In a pump regulator, a fitting provided said valve chest between the ports 1) b a dia- In testimony whereof I have signed my phragm chamber with which the said valve name to this specification in the presence of inlet passage is connected, a diaphragm in ltwo subscribing witnesses.

said chamber, a stem or rodactuated by said WILLIAM B. MASON. 5 diaphragm, and a pivoted lever acted upon Witnesses:

by said stem and to which the auxiliary valve JAs. I-I. CHURCHILL,

stem is connected, substantially as described. J. MURPHY.

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