US311747A - hambiy - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1. J. T. HAMBAY.-

FLUID REGULATOR AND GUT-OPP. No. 311,747. Patented Feb. 3, 1885.

No Model.) J,v TI HAMBAY, l 2 sheets-sheen 2.

, UNirnn STATES .ATENT Ninon.

JAMES'r. HAMBAY, on rrr'rs'une, PENNSYLVANIA, ASsiGNoE 'ro GEORGE wrsfriNonoUSE, Jn., on SAME PLACE.

FLUID REGULATOR AND CUT-OFF.

SPECIFICATION ''ozning part of Letters IPatent No. 311,747, dated February 3, 1885. Application tiled October l, 1894. (No moiel To au. whom t 17mg conce/"n:

Be it known that I, JAMES T. HAMEAY, a citizen ofthe United States, residing at Pit-ts# burg, in the county of Allegheny and State of Pennsylvania, have invented or discovered certain new and useful Improvements in Fluid Regulators'and Gut-'Otis of which improvements the following is a specification.'

In the accompanying drawings, which make to part of this specification, Figure lis an elevation, partly in section, of my improved gas regulator and cut-oft'. Fig. 2 is a similar view l showing a modified i'orm ot' valve. Fig. 3 is asectional detail view ot' the "alvefsh vn in Fig. 2. Fig. 4shows the slotted weight in elevation. My invention relates to an improved valv and operating mechanism for the automatic regulation ot' the pressure ot gas at the points 2o of consumption as against an excessivev pressure, and also for automatically cutting ot't' the g y gassupply when the pressure is reduced to a dangerous extent.

The object of my invention is to provide means whereby natural gas, which is charged intok the mains at such a high pressure that it is nearly impossible to prevent leakage fromI the mains, may be supplied to houses, or other inclosed places where Such leakage could colio lect in dangerous quantities, at'such a low pressure that there is slightprobability ofthe occurrence of any leakage; and my invention has also for. its object the prevention ot' the escape of gas from open burners at which the l iiame has been extinguished by a reduction of can flow from the inlet-chamber 2 to the out. 5( let-chamber 3., and through these openings 7 and 8 passes the valve-rod 9, on which are secured the double-balanced valves 10 and l1, adapted to litsuitably-formed seats at the ends ot' said openings, as shown. The upper end 5r ot the lvalve stem or rod extends through the stutiing-box 12 on the upper side ofthe valvecase, and the lower end of the rod fits into a suitable guideopening, 13, in the lower side of the case.

'lo the4 upper end of the valve-rod, outside ot the case, is attached the end of the short arm of the lever 14, pivoted to the standard l5, secured to the top of the case, as shown; and to the long arm of the lever, near its outer end, is adjustably attached the pistoni-od 16, extending into the cylinder 17, and

provided with a piston, 18, adapted to operate in said cylinder, which is connected to the inlet-pipe 6 by the T-coupling 19. 70

On the long arm of the lever 14 is placed the weight 20, provided with a vertical slot to allow thelever to move independent ofthe weight, which in certain positions of thelever rests upon a bracket, 2l, secured to the top of 7 5 l.the cylinder 17.

To the outer end of the long arm of the lever 14 is attached one end of a spring, 22, the

.opposite end of the spring being secured to a lug, 23, projecting from the bottom of the cylinder 17. This spring aids in the downward movement of the lever and piston after the former has been relieved of the weight 20, and the tension to which it is adjusted determines the minimum pressure necessary to move the piston and open the valves. The head of the cylinder 17 is perforated, as shown, to allow tof the escape of the air above the piston during the upward movement ot the piston.

The valve mechanism having been att-ached 9o to the service-pipe, as above described, and the minimum and-maximum pressures to be employed at the point or points of use having been determined, the spring 22 is so adjusted that its tension will be sufticient to hold the 95 lever and piston at the lowest point of their movement until the minimum pressure is exceeded. The valve-Stem 9 and piston-rod 16 are so connected to the lever 14 that when the piston-18 is at the lower or upper end of the cylinder thevalves 1l or 10 will be held onto their seats, but when the piston is at or near the middle of its stroke the valves will be opened to the fullest extent; hence any move! ment of piston to either side of its central position lwill effect a partial or entire closing of The weight 20 is made of such al minimum, the Weight is supported by thebracket 2 l, which is arranged at such a height as to support the weight when the piston is at or below the middle of t-he cylinder, and is vertically slotted so as to permit the piston to freely move independent thereof between its middle and lowest positions.

It will be observed that as the valves are perfectly balanced the piston in its movements will not have to overcome the pressure of gas on the valves, and as the piston is attached to the long arm of the lever, slight pressures on the piston will easily move the valves. By making the valves balanced by having the pressure act on the long arm of the lever, the device can be delicately ffdjusted and will quickly respondy to slight variations in pressure.

It will be seen from the 'above that variav tions of pressure above the maximum or beduced, but should they be closed bya reduction of pressure below the minimum-. e, the point at which the f l une at some or all ofthe barriers isextinguished-the valves will remain closed until the lever and piston are raised by some attendant, thus preventing any escape from the burners on the restoration of pressure.

ln place of the valve mechanism shown, I may employ a plug-valve, 24, as shown in Fig. 2, the lever 14 being so connect-ed to a crankarm of the stem of the plug-valve by the rod 25 that said valve will be open when thevpiston is at or near the middle point of its stroke.

The operation of t-he other parts of the device with a plug-valve mechanism is similaito that-above described.

When it is desired to use the valve and operating mechanism shown in Fig. 1 as a regulator only to prevent excessive pressures, the lower valves, 11, and the stop 21 should be omitted, in which case the supply is cut ofi' only when the pressure is above the maximum.

In lieu of either the double-balanced or the plug-valve described, any other suit-able double-acting valve may be used, and by double-acting valve7 I mean one that is capable of being opened and closed by the movement of the valve in either direction.

I claim herein as my invention- 1. In a system of two or more pipes for the supply and distribution, under different pressures, of fluids under pressure, a double-acting valve for regulating and cutting oli' the supply from the high-pressure part of the system to the low-pressure part, in combination with a piston connected to said valve and subject to pressure from the low-pressure part of the system, said parts being so arranged for conjoint operation that the valve is closed by an abnormal pressure and opened by a redue` tion to normal pressure, and is closed by a dangerous reduction of pressure, and held in such closed position when the pressure is restored, substantially as set forth.

2. In a gas regulatorand cut-off, thecombination of double-balanced valves and a piston for operating said valves, said parts being arranged in such relation to each other that the valves are closed by an abnormal increase of pressure and opened by a reduction to normal pressure, and are closed by a dangerous reduction of pressure, and held in such closed position when the pressure is restored, substantially as set forth.

3. In a gas-regulator, the combination of balanced valves, a lever connected at one end to said valves, a cylinder having its piston connected to the opposite end of said lever, and a weight mounted on the lever, substantially as set forth.

4. In agas regulator and cut-off, the combination of a double-acting valve, a lever con! JAMES T. HAMBAY.

Witnesses:

DARWIN S. WoLcoTT,

lt. H. WHI'rfrLigsEY.

Images