US613681A

US613681A - Combined excess and back pressure check for gas-meters

Info

Publication number: US613681A
Authority: US
Publication date: 1898-11-08
Anticipated expiration: 1915-11-08

Description

No. 6I3,68|. Patented Nov. 8, I898. W. B. HOYT.

COMBINED EXCESS AND BACK PRESSURE-CHECK FOB GAS METERS.

(Applieationflled Aug. 21, 1897.)

(N0 Mbdol.)

iiitivilii'vi INVENTOR Mrflfiyfi ATTORNEY m: NORRIS PETERS c0, FNOTO-LITHOU wunmo'rom a. c.

I NITED STATES PATENT OFFICE.

WALTER B. IIOYT, OFELMHURST, NEW YORK.

COMBINED EXCESS AND BACK PRESSURE CHECK FOR GAS-METERS.

slaiaemeimn forming part of Letters Patent No. 613,681,-dated November 8, 1898. imitation eta August 21, 1897. Serial no. 649,090. (No model.)

T0 at whom it may concern.-

I Be it known that LWALTER B. HOYT, a citi- Zen of the United States, residing at Elmhurst, Queens county, New York, have invented certain new and useful Improvements in a Oombined Excess an Back Pressure Check for Gas-Meters, of'v ich the following is a full, clear, and exact description.

My invention relates to checks for gas-meters, and has for its objects the prevention of inaccurate registering by gas-meters by reason of what is commonly termed back pressure, and also the prevention of too-rapid registering by said meter, resulting from excess pressure.

My invention is illustrated by the accompanying drawings, in which- Figure 1 is a longitudinal section through the center of a gas-pipe and through my improved checking apparatus contained therein. Figs. 2, 3, and 4. are perspective views of detai%s, and Fig. 5 is a plan view of another detai A A are ends of a gas-pipe connected by means of the well-known union B and leading from a suitable gas-meter. (Not shown.) D is the casing of my improved gas-check, the said casing being of suitable size and shape to be inserted within the pipe. E is a flange at the upper edge of said casing D, the same being of slightly-greater diameter than the inner diameter of said gas-pipe, so that, as shown in Fig. l, the said flange will overlap the end of the pipe. I

F is a gauze disk made from any suitable material. The disk F in operation is located, preferably, at or near the upper end of the casing D.

G is a washer of a size to correspond substantially to the flange E. The Washer G provides one means by which the gauze F may be held, the same being in this case placed between the said flange and washer.

H is an eyelet of suitable shape and size and located in the disk F. This eyelet loosely surrounds and acts as a guide for the stem I of the valve J. The valveJ is by preference substantially conical in shape,or it may be of any other shape so long as it is adapted to overlap the valve-seat K, which is internally directed and made to correspond substantially thereto.

The valve-seat K is located in the casing D, preferably at its lower end. Through the seat K suitable perforations-,one or more,are made. Through these perforations the gas maypass in one direction, the reverse direction of the gas being prevented by the closing of the Valve, as hereinafterdescribed. In the chan* nel around the valve-seat K may be held a suitable liquid L, such as glycerin, the object of the same being to perfect the gas-tight joint when the valve shall be closed. In Fig. 1 the valve is shown at a point approximately half-way between the opened and the closed position. When the sealing liquid is used, the pressure of gas from below in the pipe A seeking to pass through the pipes in the direction of the arrow, Fig. 1, raises the valve J, so that its lower edge clears the liquid, leaving sufficient space for the gas to flow.

In placing the device in a gas system the check is dropped into a pipe A. Then by bringing the pipe A into alinement with the pipe A the same are drawn toward each other by means of the'union B, the adjacent ends of the said pipe engaging and holding the flange E, gauze F, and washer G,

Should it be found that the wire-gauze is too fine, a coarser disk may be substituted, or vice versa, as required, disks of varying meshes being readily obtainable.

While the disk F is designed and is chiefly effective in retarding the excess flow of gas, it in a way serves to check back pressure. The more important means for accomplishing the latter end is the valve J, which closes as soon as the pressure in the pipe A is greater than that in pipe A. The cooperative effect of the gauze F and valve J, however, has been found to be far more effective than the separate use of either.

It should be understood that the valve J may be used without the liquid, and I therefore desire to have-it understood that I claim my invention with that end in view.

What I claim is In a combined excess and back pressure check in combination a casing adapted to be held within a pipe and having a flange, an inwardly projecting conical valve seat, a

valve adapted to fit over said seat and having a spindle projecting longitudinally of said pipe, wire-gauze held by said casing fhrough York and State of New York, this 10th deify which said spindle passes and by which it is of August, 1897.

mided said valve operatin to allow the pasr 1 .7 n i age ofgas through said seat and to prevent VVALIER HOX 5 the backward passage through said seat, sub- XVitnesses:

stantially as described. R. O. MITCHELL,

Signed at New York, in the county of New R. S. OSWALD.