US1026570A - Gas cut-off. - Google Patents

Description

V 0. P. DRESSEL.

GAS GUT-OFF. APPLIUATION FILED SEPT. 21, 1909.

1,026,570, I Patented May 14, 19 12.

COLUMBIA PLANDuRAPl-l 60., WASHINGTON. D. c.

UNITED STATES PATENT ()FFTCE.

CHARLES P. DBESSEL, OF WILKES-BARBIE, PENNSYLVANIA, ASSIGNOB 0F TWO-THIRD$ TO ARTHUR MORGAN AND I. W. MENDELSOI-IN, BOTH OF WILKES-BARBIE, PENNSYL- VANIA.

GAS CUT-OFF.

1,026,570. Specification of Letters Patent Patented May 14, 1912.

Application filed. September 21, 1909. Serial No. 518,782.

To all whom a may concern I Be it known that I, CHARLES P. DREssEL, a citizen of theUnited States, residing at Wilkes-Barre, in the county of Luzerne and State of Pennsylvania, have invented new and useful Improvements in Gas Cut-Offs,

of which the following is a specification.

The invention relates to an improvement in gas cut-offs, comprehending specifically a means automatically controlled by the pressure of the gas which will close the burner to the passage of the gas upon the cessation of flowing pressure.

The mainobject of the present invention is the provision of a gas cut--oif arranged to be mechanically opened to permit the flow of gas from the supply pipe to the burner and maintained in open position during the flow of the gas, the construction of the cut-off insuring its automatic closing to prevent passage of gas to the burner immediately upon the cessation of flowing pressure from any cause whatever.

The invention in its preferred details of construction will be described in the following specification, reference being had particularly to. the following drawings, in which Figure l is a sectional view, partly in elevation, illustrating the improvement, the cut-oft being shown in closed position. Fig. 2 is a similar view with the cut-off in open position. Fig. 3 is a section on line 3-3 of Fig. 1. Fig. & is a broken perspective showing the bearing pin for the lever. Fig. 5 is a section on the line 5-5 of Fig. 1. Fig. 6 is a view in elevation, partly in section, showing a slightly modified construction of the manually operable means. Fig. 7 is a side elevation "of the same. Fig. 8 is a section on line 88 of Fig.7.

Referring particularly to the accompanying drawings, my improved gas cut-off comprises a casing 1 formed adjacent one end with an upwardly extending gas outlet 2, ex teriorly threaded for the reception of the usual burner tube, the casing being provided at the opposing end with a depending nipple 3, exteriorly threaded to permit the connection thereto of the gas supply pipe leading from the meter or other source.

Secured transversely of the casing is a bearing pin 1, threaded at one end as at 5 for engagement with one wall of the casing,

the bearing portion of the pin being of triangular shape in section with a rounded base, thereby presenting a. knife edge 6 upon which the operating lever is fulcrumed for actuation with the minimum friction. Mounted upon the pin 4: is an operating lever 7 having the pin engaging portion in the form of a ring 8, and opposing arms 9 and 10 project-ing in opposite directions from the ring. The lever extends longitudinally of the casing with the longer arm 9 projecting toward the outlet end 2 of the casing, the shorter arm projecting toward the inlet end 8. Secured to the free terminal of the longer arm is a rod 11 carrying at its upper end what I term a pressure disk 12. The disk is preferably of truncated cone shape having its base portion 13 of a diameter slightly less than the interior diameter of the outlet nipple 2. The disk is formed with a. vertical bore 14.- for the passage of the gas which, at the lower end, communicates with one or more transverse bores opening into the nipple 2, whereby the gas may find its way freely through the disk at all times.

The free end of the arm 10 of the lever is formed with an elongated slot 15 in which is loosely secured a rod 16 carrying at its lower end a cut-off valve 17. The valve 17 is of cylindrical shape for the greater portion of its length, being formed at the upper end to provide a conical valve plug 18, and at the lower end to provide an inverted cone shaped deflecting surface 19. The valve plug 18 is designed, when the valve is in closed position, to cooperate with a valve seat 20 formed in a partition 21 bridging the inlet nipple approximately at its juncture with the casing, the barrel or body of the valve operating in a guide ring 22 connected by radial arms to the nipple.

In Figs. 1 and 2 I have shown the manually operable means as comprising a stem 23, formed at the outer end with a button 24E with its inner end arranged to underlie the long arm 9 of the lever. The stem preferably operates in a nipple 25 threaded in an opening in the casing, and carries a valve 26 designed to seal the stem opening in the nipple when said stem is in lowered or inoperative position, thereby effectively preventing the escape of gas at this point.

In Figs. 6, 7 and 8 I have shown a modified form of manually operable means, in-

cluding a rod 27 provided at the outer end with a head 28 and revolubly bearing, at the inner end, in a boss 29 fixed to the opposing wall of the casing. On the rod, in a position to underlie the long arm 9 of the lever, is a cam disk 30, the cam action of which is secured by eccentrically mounting the disk on the rod. The opening for the rod into the casing is sealed in any desired manner, preferably by a packing gland, as shown at 31 in Fig. 8. The case is preferably open on one side and designed to be closed by a sliding gate 32, the opposing edges of which are of angular formation, as at 33, to fit within correspondingly shaped grooves in the Walls of the case opening. The gate is secured in place by pins 34 passing therethrough and threading into bosses 35 carried by the opposing wall of the casing. As constructed, it will be noted that the long arm 9 of the lever with its connected parts constitutes the'weighted end and that therefore, in normal position, said weighted end is depressed with the effect to draw upward the short end of the lever and thereby force the valve 17 to its seat and cut off the flow of gas to the casing and burner tube.

In the initial use, the long arm of the lever is manually elevated by pressure upon the stem 23 in the preferred form or the turning of the rod 27 in the modified form. This elevates the pressure disk 12 and depresses the valve 17 permitting a free flow of the gas to the burner tube. Upon opening the burner cock and igniting the gas, the flow continues and the pressure exerted by the flowing gas bearing against the enlarged surface 13 of the disk is sufficient to maintain the parts in set position and provide an uninterrupted flow for consumption in the usual manner. Immediately upon the cessation of such flow, however, the excess weight favoring the long arm of the lever reasserts itself with the effect to depress said end and elevate the short end of the lever, closing the valve 17 and preventing further flow of the gas until the lever is again manually operated.

The invention is particularly applicable to coin controlled meters as it prevents any person from restoring the flow of gas in the burner tubes and thereby causing a dangerous condition at a burner tube which has been left lighted and is thereby open, as under said conditions the particular burner tube will automatically cut off the flow of gas therethrough until the open condition of the valve is manually restored. The invention also prevents the possibility of a flow of gas through a burner tube after the usual burner cock has been turned to cut off said flow, as under such conditions the pressure on opposing sides of the disk becomes balanced, releasing the lever to the influence of the weighted end. The invention will also automatically cut off the flow of gas in the event of a breakage in the main or a supply pipe, and the flow cannot be restored except upon the manual operation described.

The use of the fulcrum pin 4: reduces the 79 friction of the lever in operation to a minimum and insures sensitive and speedy effect; the diameter of the base of the disk, being slightly less than the diameter of the outlet nipple, causes the flowing gas to maintain the edges of said disk circumferentially. spaced from the interior surface of the nipple, thereby avoiding all friction, at this point, while the conical lower end of the valve 17 obviates direct pressure of the gas upon said valve and thereby prevents a seating of the valve by the upward pressure of the gas thereon.

The invention provides a simple form of gas cut-off which may be connected between the supply pipe and burner tube of any fixture and will automatically and positively control the flow of gas through the tube, preventing the passage of gas therethrough succeeding any cessation in the gas pressure within the casing no matter from what cause the pressure is educed.

The material of which the various parts is to be constructed is not important in the presentinvention, though in this connection it is to be understood that I contemplate having the parts of light metal, such as aluminum or the like, so as to render the device particularly susceptible to variations in the gas pressure.

If desired, the partition 21 and the guide ring 22 may be of independent parts and threaded within the inlet nipple 3, as shown in Fig. 6, and the outlet nipple is preferably provided with a stop 36 to limit the upward movement of the disk under the influence of the flowing pressure.

I claim:

A gas cut-off including a casing formed with an outlet nipple and an inlet nipple, 110 an operating lever pivotally mounted in the casing and composed of two arms, the pivot point of said lever being arranged nearer the inlet nipple than the outlet nipple, one of said arms being of a greater length than 115 the other, a pressure disk pivotally connected with said longer arm and arranged in the outlet nipple of the casing, a stop arranged in the outlet nipple and in the path of movement of the disk and adapted to limit the 12 upward movement of the disk in. the operation thereof, the shorter one of said arms being formed with an elongated slot, a cylindrical controlling valve arranged in the inlet nipple of the casing, the upper end of said 125 valve being formed to provide a frusto conical valve plug for closing the communication between the inlet nipple and the casing, an inverted conical deflecting surface formed integral with the lower end of the valve, a 130 connection between said valve and the lastadapted to actuate the lever to open the named arm of said lever and operating in valve. 7 10 the slot therein, a guide ring formed in the In testimony whereof I afiix my signature outlet nipple of the casing and embracing in presence of two witnesses.

the controlling valve for guiding the same, CHARLES P. DRESSEL. and a manually operable means arranged in Witnesses:

the casing below the longer arm of said lever JOHN L. Fm'roHER,

and forwardly of the pivot point thereof and N. K. MCGEE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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