US1962776A

US1962776A - Valve

Info

Publication number: US1962776A
Application number: US298836A
Authority: US
Inventors: John J Kenney
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-08-10
Filing date: 1928-08-10
Publication date: 1934-06-12
Anticipated expiration: 1951-06-12

Description

J. J. KENNEY June 12 1934.

VALVE Filed Au 10, 1928 Patented June 12, 1934 UNITED STATES PATENT OFFICE 4 Claims.

The present invention relates broadly to thermal responsive devices, and more particularly to a thermostatic valve effective for automatically cutting off the supply of a combustible fluid in the event of failure of a pilot light.

At the present time in burning combustible gases and some liquids it is customary to provide a thermostatically operated system comprising a pilot light for igniting the combustible fluid should the main burner be extinguished. In such systems, if the pilot light be extinguished and the thermostatic valve afterward opened, the combustible fluid escapes from the burner without being ignited. The escaping unconsumed fluid produces a condition favorable to the formation of explosive mixtures. The unconsumed combustible fluid is often poisonous.

I provide a thermostatic valve in which the valve proper is controlled by the heat liberated 20 from the pilot light. If the pilot light be extinguished. the valve is closed and remains closed until the valve is manually opened. The period of manual control continues until the pilot light has sufficiently heated the adjacent parts of the valve to cause the valve to remain open by the operation of thermal responsive elements adjacent the pilot light. Certain features of the present invention constitute improvements over the structure shown and described in my Patent No. 1,606,079 of November 9, 1926, and the structure shown and described in my copending application, Serial No. 166,126, filed February 5, 1927.

In the accompanying drawing there is shown, for purposes of illustration only, a preferred embodiment of the present invention, it being understood that the drawing does not define the limits of my invention, as changes in the-construction and operation disclosed therein may be made invention or the scope of my broader claims.

In the drawing,

Figure 1 is a longitudinal sectional view through a valve in its closed position and constructed in accordance with the present invention;

Figure 2 is a similar view of a portion of the valve showing the parts in the open position of the valve;

Figure 3 is a plan view of the valve with a portion thereof removed; and

Figure 4 is a sectional view thereof taken along the section line IVIV of Figure 1.

Referring to the drawing, a thermostatic valve 1 comprises a valve body 2 having an outlet port without departing either from the spirit of the.

4 and an inlet port 5 at one end. Figure 3 is a plan View of the valve after'the port 5 has been removed from the body 2. The body 2 is provided with a valve seat 6- against which a valve 7 is urged by a spring 8. The valve 7 is provided with ports 7a to permit the passage of gas when the valve is open.

An extension 9 on the valve body 2 is provided with a threaded bore 10 for the reception of a tube 11 of thermally responsive material, such as brass. The outer end of the tube 11 is closed by a threaded plug 12. The plug 12 is provided with an opening 14 in which a, pilot burner 15 is seated.

A rod 16, of material that is thermally responsive to a much less degree than the material of the tube 11, is supported in the plug 12 and extends through the tube 11, the bore 10 and into the interior of the valve body 2. When the tube 11 is heated by a flame from the pilot light or burner 15, the tube 11 expands and moves the plug 12 outwardly from the valve body 2 and carries the rod -16 therewith. The inner end of the rod 16 is provided with a pointed head 17 for actuating mechanism controlling the valve 7.

Combustible fluid is supplied to the pilot light or burner 15 through a tube 18 extending into a bore 19 in the valve body 2 disposed in the extension 9. A passageway 20 extends from the end of the bore 19'to the interior of the valve body. The passageway 20 is intersected by an opening 21 in which a regulating valve plug 22 is seated. The valve plug 22 is provided with an opening 24 for alignment with the passageway 20. The outer end of the valve plug 22 is provided with a notch 25 for engagement by a suitable tool.

For securing the valve plug 22 in place, it is provided with a groove 26 disposed substantially opposite to the outer surface of the material of the extension 9. After the valve plug 22 is inserted into the opening 21, the metal of the valve body 2 adjacent the groove 26 is upset and driven into the groove, thereby securing the valve plug 22 in place.

The position of the valve '7 is controlled by a protuberance 27 in the form of a pin seated in an opening 28 disposed at substantially the center of the valve 7'. The pin 27 extends downwardly beyond the wall of a recess 29 formed in the under surface of the valve. Upon the application of pressure to the pin 27, the valve is raised and held in a raised position, as illustrated in Figure 2, against the force of the spring 8.

For applying force to the pin 2'7, a dish-shaped boss or lug 30 is mounted on the end of a lever 31 for a rocking motion to bring the forward edge or rim 32 of the lug under and away from the end of the pin 27. The inner walls of the lug are substantially perpendicular to the end face of the lug to avoid a cam action. A portion 34 of the face is cut away to prevent the rear edge of the lug from engaging the end of the pin when the valve is in its closed position as hereinafter described.

When the pin 27 is opposite the depression in the lug 30, the valve 7 rests against its seat 6. However, when the end of the pin 27 engages the forward edge 32 of the lug, the valve '7 is raised from its seat.

The other end of the lever 31 rests upon lugs 35 projecting from the inner wall of the body 2 at opposite sides of the opening 4. The contacting areas of the lever 31 and lugs 35 may be hardened if desired. The lever 31 is provided with a notch 3'7 near its lower end for engagement with the end 1'? of the rod 16.

On the opposite side of the lever 31 from the notch 37 and below the latter, a notch 39 is provided for engaging a pointed pin 40 adiustably mounted in the valve body 2 by a screw 41. By

- reason of the relative longitudinal spacings of the notches 3'7 and 39, the

bearing points

17 and 40 impart a rockingmotion to the lever 31 upon relative movement between the rod 16 and the pin 40. A spring 42 is mounted between a boss 44 on the inner surface of the body portion 2 and the boss 45 on the surface of the lever 31 opposite the notch 3'7 for urging the lever 31 into firm engagement with the end 1'7 of the rod 16.

With the foregoing construction, when the parts are in the open position of the valve shown in Figure 2 and the tube 11 is heated sufilciently to draw the rod,16 to the right, as viewed in Figures 1 and 2, far enough to permit the lug 30 to occupy the position shown in Figure 2 with the end of the pin 2'7 resting upon the forward edge of the lug 30, the valve remains open so long as the pilot light 15 continues to develop heat. Should the pilot light 15 become extinguished, the tube 11 contracts, thereby moving the rod 16 to the left, as viewed in Figures 1 and 2. The movement of the rod 16 causes the lever 31 to turn about the end of the pin 40 as a fulcrum against the frictional resistance between the pin 27 and lug 30, and the resistance offered by the spring 42. When the turning movement is sufflcient to move the edge 32 from beneath the end of the pin 2'7, the valve '7 snaps into position over the valve seat 6, thereby closing communication between the

ports

4 and 5. If the tube 11 cools sufilciently to bring the rear edge 34 of the lug opposite the end of the pin 27, an opening movement of the valve '7 is avoided by the presence of the notch 34 in the face of the lug.

For manually opening the valve 7, a bail 46 is provided. One end of the bail mounted in a seat 4'7 in the valve body 2. The other end 48 is provided with a shoulder and extends through a joint 49 substantially diametrically disposed relative to the seat 47. The expansive force of the bail closes and maintains the joint. The end 48 is provided with a hand-grip 50. The intermediate portion 51 of the ball is bent to normally rest on a pin 52 projecting from the valve body 2, and to engage the lower face of the valve '7, as shown in dotted lines in Figure 2 when the ball is rotated. In starting a burner constructed according to the present invention, the valve '7 is lifted from its seat 6 by turning the bail 46. After the pilot light has been lit long enough to warm the tube 11 a sufiicient amount to permit the lever 31 to move far enough, under the influence of the spring 42, to bring the edge 32 of the lug under the end of the pin 2'7, the bail 46 is released and then rests on the pin 52. Fluid traverses the valve until the pilot light 15 is again extinguished or turned so low as to permit the tube 11 to cool oif.

With the foregoing structure, accidental opening of the valve 7 while the pilot light 15 is extinguished is prevented, as the opening of the valve '7, after it has been closed by the operation of the thermostat, requires a positive manual operation.

I claim:

1. A valve comprising a body portion having a valve seat formed therein, a valve cooperating with said seat and means for raising the valve from itsseat comprising a curved resilient memher, a portion of which extends through the valve body and having means for closing the opening through which the member extends, said means being urged into its sealing position by the resiliency of said member.

2. A valve comprising a body portion having a valve seat formed therein, a valve cooperating with said seat and manually operated means for raising the valve from its seat comprising a curved resilient member, a portion of which exe tends through the valve body and having means for closing the opening through which the member extends, said means being urged into its sealing position by the resiliency of said member.

3. In a valve, a body portion including a valve seat, a valve disk for cooperation with said seat, means for lifting said valve disk comprising a resilient bail traversing the body portion and having an imperforate bearing therein at one end and passing through the wall of the body portion at its other end, and means on said ball adjacent the point at which it passes through the wall, maintained in engagement therewith by the resiliency of said bail, for establishing a tight joint.

4. In a valve, a body portion, valve operating means comprising a resilient bail extending through the wallof said portion at one point only and having a pivotal bearing on the interior of said portion opposite said point, and means carried on said bail and urged into engagement 155 with the wall of said portion by the natural resiliency of the bail, for providing a tight joint.

JOHN J. KENNEY. I