US556402A - conti - Google Patents

Description

(No Model.)

I 2 S11ee tsSheet 1.

J. T. F. GONTI. I FLUID PRESSURE REGULATOR. .7 Patented Mar. 17, 1896.

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(No Model.) 7 Sheets-Sheet 2.

J. T. F. CONTI. I 7 FLUID PRESSURE REGULATOR. No. 556,402." Patented Mar. 17, 1896.

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UNITED STATES PATENT OFFICE.

JAMES TIBUROE FELIX CONTI, OF PARIS, FRANCE.

FLUID-PRESSURE REGULATOR.

SPECIFICATION forming part of Letters Patent N0. 556,402, dated March 17, 1896. Application filed September 9, 1895. Serial r5. 661,910. (No model.)

To all whom, it may concern:

Be it known that I, J AMES TIBURCE FELIX CONTI, of the city of Paris, France, have in vented Improvements in Fluid-Pressure Regulators, of which the following is a full, clear, and exact description.

Pressure-regulators as heretofore used for enabling a gas compressed at a certain pressure to be utilized at another pressure, either fixed or variable, automatically cut off the communication between the motor and reser voir when the pressure on the motor attains the degree desired, the communication being re -established at each expenditure of the pressure, thus effecting the distribution of the gas at a pressure which may be constant or be varied by hand. The apparatus forming the subject of the present application for Letters Patent has for its object, on the contrary, to enable the pressure in the interior of a completely-closed chamber to be varied at will without any expenditure of gas. Thus, for example, the apparatus when applied to compressed-air brakes permits of varying by hand the pressure of the air acting on the brakepistons to any desired extent.

Reference is to be had to the accompanying drawings, forming part of this specification, in which- Figure 1 represents a cross-section on line 1 2, and Fig. 2 an axial section of the regulator.

The same letters denote like parts in both figures.

The apparatus comprises two valves a a upon the same spindle b and serving to control communication with the chambers c and (1 respectively. e is a piston, upon which bears a spring f, which abuts at its other end against a screw-gland g abutting against a cross-head it through the nut i and lock-nut j, whereby the initial tension of the spring is regulated. The cross-head h is connected by rods to the cylinder Z, in which fits as a piston the body portion m, the cylinder Z having a ring 92, whereby tractive force may be applied to cross-head h by any suitable means. The chamber 0 communicates by a pipe connected to 0 with a high-pressure reservoir, and chamber d communicates by passage 10 with the receiver in which the pressure is to be regulated, which, in the present example, would be the brake-cylinders.

The action of the apparatus is as follows: Supposing a certain tractive force to be applied to ring a and transmitted to cross-head h, the movement of the latter through a given distance will produce the following effects: The spring f will first move down the piston e and cause the closure of valve a on its seat and cut off the communication of chamber d with the external air. The continued motion of the piston e, which then carries with it both valves a a causes valve a to open communication between chambers c and (1, whereby the reservoir of fluid under pressure is putin communication with the receiver in which it is desired to modify the pressure. Immediately the fluid which has passed through the valve a into chamber (1 exerts pressure upon piston c superior to that of spring f the piston rises, valve a is closed by a spring q, and the receiver, the brake-cylinder in the present case, being no longer in communication with the reservoir of compressed air, the pressure in the brake-cylinder will remain constant and equal to that on the side of the piston 6 next the chamber (1, which is balanced by that of the spring f. If now the cross-head h is retained in a fixed position, the pressure in the brake-cylinder will remain constant independently of the tightness of the joints, for should a leakage occur in the brake-cylinder the pressure in chamber 61 will fall, the equilibrium will be disturbed, and piston 6 under the action of spring f will again open valve a and admit the fluid under pressure from chamber 0 until equilibrium is restored.

It will thus be seen that for each position of cross-head it there is a corresponding and different pressure equal to the stress of the spring f on the piston e at that position.

If it be desired to diminish the pressure within the receiver (the pressure within the brake-cylinders in the example under consid eration) it is only necessary to allow the crosshead it to rise to a suitable extent, whereupon the equilibrium on piston 6 being disturbed by the pressure within d exceeding that exerted by the spring f the piston ewill rise and cause valve o to open and allow the escape of air from d, and consequently from the receiver, until the pressure therein again becomes equal to that of the spring f. Thus by means of the apparatus a given pressure may be maintained in a closed receiver and may be varied at will by pulling on the ring 72.

The cylinder Z, in which the body portion works as a piston, constitutes a safety appliance when the regulator is applied to airpressure brakes. If the connections with at,

through which the operation of the brake mechanism is controlled, were to fail, the enginedriver could nevertheless control the brakes by turning on a cock, admitting compressed air through '2' to the cylinder Z, which is thereby moved downward and with it the cross-head h, with the result above described.

The nuts ij enable the tension of the spring to be regulated to correspond to the minimum pressure first required, whereby with the same apparatus and the same spring difierent variations of pressure may be obtained for the same motion of the cross-head 7t, whatever maybe the pressure of the reservoir. Thus, for example, the pressure may be varied as well from nothing to six kilos as from fifteen to twenty-five kilos by merely regulating the initial tension of the spring.

It is to be understood that this regulator may be applied to all the purposes for which regulators now in use are employed.

I claim- 1. The herein described double acting pressure-regulator, consisting in the combination of the two chambers e (Z, the one in communication with the fluid under pressure and the other with the receiver in which the pressure is to be regulated, the chamber d being closed by a piston e uhich balances the regulated pressure, a spring bearing upon said piston to move the same, a movable support for said spring, valves a a connected together and respectively controlling the communication between the chambers c d and between chamber cl and the open air, the opening and closing of said valves being determined by the piston e, substantially as specified.

2. In the herein-described fluid-pressure regulator, the safety appliance consisting in the combination, with the regulator proper comprising the chambers 0, cl, valves a a spring-pressed piston e, cross-head h, of the cylinder Z coupled thereto and in whiehthe body portion works as a piston under the pressure of fluid admitted to said cylinder for controlling the regulator in case of use, substantially as specified.

The herein described double acting pressure-regulator, consisting in the combination of two chambers 0, (Z, the one in communication with the fluid under pressure and the other with a receiver in which the press ure is to be regulated, the chamber d being closed by a piston which balances the regulated pressure, a spring bearing upon said piston to move the same, means for adjusting the tension on said spring and a movable support therefor, valves (0, a connected together and respectively controlling the communication between the chambers 0, cl, and between chamber d and the open air, the opening and closing of said valves being determined by the piston e, substantially as specified.

The foregoing specification of myimprovcments in fluid-pressure regulators signed by me this Blth day of August, 1895.

JAMES TIBUHCE FELIX COX'II.

lVitnesses CLYDE SHRorsHInE, ALBERT MOREAU.

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