US974671A - Gas-burner. - Google Patents

Description

G. A. JOHNSON. GAS BURNER;

APPLICATION FILED APR. 11, 1910.

974,671 D Patented Nov. 1,1910.

CARL A'. JOHNSON, OF BUGKLIN, MISSOURI, ASSIGNOR OF ONE-FOURTH 'IO JOHN T. COLEMAN, OF 'IOLAR, TERRITORY OF NEW MEXICO.

GAS-BURNER.

Specification of Letters Patent.

Application filed April 11, 1910.

Patented Nov. 1, 1910.

Serial No. 554,750.

To all whom it may concern:

Be it known that I, CARL A. JOHNSON, a citizen of the United States, residing at Bucklin, in the county of Linn and State of Missouri, have invented a new and useful Gas-Burner, of which the following is a specification.

It is the object of the present invention to provide an improved gas burner of that type embodying means for automatically cutting 0d the gas in the event that the flame is accidentally extinguished.

It is one aim of the present invention to improve and simplify the structure of the burner mechanism illustrated and described in Patent Number 939,263, issued to me on November 9, 1909. Incidentally, the invention aims to render more substantial the structure of the device whereby the same will be better adapted to general use and will not be liable to get out of order or become accidentally disarranged. The aims of the present invention are in general identical with those of the invention of the patent; mainlyto provide for the automatic cutting off of the flow of gas to the burner in the event of contraction of the thermostatic element of the burner, its abnormal expansion, its fracture, or its disengagement from the member by which it is supported.

In the accompanying drawings,-Figure 1 is a view partly in elevation and partly in section of the burner of the present inven tion. Fig. 2 is a similar view, illustrating the positions assumed by the several parts when the valve of the burner is open. Fig. 3 is a sectional view taken in a plane at right angles to the plane of Fig. 1. Fig. 1 is a horizontal sectional view through the burner on the line 4% of Fig. 1. Fig. 5 is a perspective view of one of the members of the burner to which the thermostatic element is connected. Fig. 6 is a perspective view of the valve actuating member of the burner. Fig. 7 is a view similar to Fig. 3 but of the lower end of the device only and illustrating the parts in the position assumed when the valve is open. Fig. 8 is a view similar to Fig. 7 illustrating the position assumed by the parts when the valve is closed.

In the drawings, the gas supply pipe of the burner is indicated by the numeral 10 and terminates in a burner tube 11 provided at its upper end with an ordinary burner tip 12. An ordinary plug valve 13 is fitted in the pipe 10 and has its stem provided with is preferably formed integral with the said supply pipe of the burner, the said head being located in a vertical plane, as clearly illustrated in Fig. 8 of the drawings. This head 15 constitutes part of the barrel of the casing and this barrel includes, in its structure, a second head which is made up of two semicircular sections 16 fitted together upon the stem of the valve 13 and formed each with a flange 17 and the edges of these flanges bear against the forward face of the said head 15 at the peripheral edge thereof, the said parts of the barrel being held together by suitable lugs or other means, the showing of which is omitted in the drawings, for the sake of clearness. Each of the sections 16 is formed with an upstanding substantially V-shaped casing extension which is rearwardly offset with respect to the barrel of the casing and the arms of this V-shaped extension are indicated one by the I numeral 18 and the other by the numeral 19, the arm 18 extending upwardly at an angle in advance of the burner tube 11, the arm 19 extending also upwardly at an angle rearwardly of the said burner tube. The eX- tensions of the casing between the arms 18 and 19 are preferably cut away leaving semibands 20 which embrace the burner tube and serve to hold the extension rigid with respectto the said tube. The arm 19, as will be presently made clear, may be solid, but the arm 18 is hollow.

'In the barrel of the casing and upon the stem of the valve 13, there is mounted, for free swinging movement, a valve actuating member in the nature of a plate of segmental form, indicated by the numeral 21. At one outer corner, the said plate is formed with a lug 22 which projects in the direction of the forward face of the head 15 and formed in this plate and extending from the said lug to and opening through the opposite radial edge of the plate is a slot 23. The formation of this slot results in a resilient arcuate finger 24, which is sprung rearwardly, or in other words, to project toward the head 15 and a lug or shoulder 25 upon this said head is adapted to be engaged by the free extremity of the finger whereby the said valve actuating plate 21 will be held against swinging over to the left in Fig. 3 of the drawings. Movement of the plate to the right in the said figure of the drawings is limited by a lug 26 formed at that corner of the plate opposite the corner at which the lug 22 is located. A spring 27 is engaged at one end with the first mentioned radial edge of the plate 21 and is coiled about the valve stem and connected at its other end to a pin 28 upon the head 15 and this spring tends at all times to swin the plate 21 to the left in the said Fig. 3 of the drawings, it being understood that this movement is normally prevented by the engagement of the free extremity of the finger 24 with the shoulder 25. The invention contemplates that the plate 21 will cooperate with the fixed member upon the valve stem whereby when the finger 24 is disengaged from the shoulder 25, the swinging to the left of this plate by the spring engaged therewith will result in the cooperation of the said plate and the member referred to as being upon the valve stem, to rotate the said valve stem and close the valve.

The member above referred to is in the nature of a plate fixed upon the stem of the valve and having a volute or cam edge, the said plate being indicated by the numeral 29 and having a portion of its edge (that portion which is more remote from the axis of the plate) formed With a flange 30 which projects, preferably forwardly from the said plate. It will be observed from inspection .of Fig. 3 of the drawings that at a point substantially diametrically opposite the outermost edge portion of the disk 29, the said disk is formed with a lug 31 adapted to engage with a stop 32 when the valve is in closed position whereby the same may not be opened except by rotation to the right in Fig. 3. Thus it will be understood that should the plate 21 be automatically released and be movedto the position shown in Fig. 8 of the drawings, it may be returned to original position (see Fig. 7) by turning the valve to the right.

It will be observed that the lug 31 on the member 29 engages against that edge of the valve actuating member at which the lug 26 is formed, when the parts are in the position shown in Fig. 8 of the drawings and that when the member 21 is in set position, the valve may be turned to any desired point and should the valve actuating member be released due to any cause, its said edge will strike the lug 31 resulting in a closing of the valve. It will further be understood that should the valve be only partly open and the actuating lever be released, the valve will be moved to closed position.

From the foregoing description, itwill be readily understood that means is to be provided for automatically disengaging the finger 24 from the shoulder 25 and that such means is to be actuated through the contraction and expansion of a thermostatic element connected therewith. The means mentioned is mounted in the hollow extension 18 of the casing for the mechanismand embodies an arm 34 which is formed, adjacent its upper end, with a housing 35 receiving a pivoted pin 36 which extends across the upper end of the said extension of the casing. F rom this it willbe understood that the arm has its major portion extending within the extension and that the said arm may rock to a limited degree upon the said pivot 36. A plate 37 is provided at its upper end'with a loop 38 and adjacent its lower end with an open-sided loop 39 both of which loops slidably fit the arm 34 and consequently support the plate upon the said arm for sliding movement. lower end of the arm 34 is directed forwardly, or in other words, in the direction of the finger piece 14 of the valve, as at 40. The forward edge of the plate 37 is formed with a flange 41 which extends in advance of the forward edge of the arm 34 and the convex edge of the arm bears against a filling 34 in the open-sided loop 39 for a purpose to be presently explained. The plate 37 is further formed with a rearwardly extending shoulder 42 and at its lower end is bifurcated, as at 43, to afford spaced portions 44 and 45, of which portions the one 45 is located rearwardly of the one 44. For a purpose which will presently be made clear, the plate 37, above the shoulder 42, is so relatively narrowed that its rear edge will lie forwardly of the rear edge of the arm 34. At a point below its pivot, the arm 34 is shouldered, as at 46, and a spring 47 is fitted upon the arm and bears at its upper end against the shoulders 46 and at its lower end against the upper end of the plate 37, it being understood that this spring tends to hold the plate at the limit of its downward movement upon the arm.

A bowed spring 48 is engaged at the lower end of one of its arms with the forward wall of the extension 18 of the casing and the corresponding end of the other arm is engaged through the arm 34 at a point between the upper edge of the shoulder 42 of the plate 37 and the loop 38 of the said plate. This spring 48 tends to expand and consequently it holds the arm 34 normally rocked rearwardly or in the direction of the burner tube 11' and furthermore, its engagement with the arm 34 at It will be observed that the the point mentioned, serves as a means for limiting the up and down sliding move ment of the plate 37 upon the said arm. The thermostatic element of the device is in the form of a wire 48 of some metal or composition of metals having a high coefficient of expansion and contraction, and at one end this wire is secured by means of a clip plate 50 and a set screw 51, to the upper end of the casing extension 19. The other end of the wire is hooked, as at 52, and is engaged 111 a notch 53 formed in the forward edge of the arm 34 of the upper end thereof and consequently above the pivoted end of said arm. It will be observed that this thermostatic wire extends adjacent the tip 12 of the burner tube and is consequently affected by the flame issuing from the said tip. For a purpose to be presently explained, the flange 30 is formed with a notch 54 and one wall of the casing extension 18 is formed with an opening The operation of the device is as follows:

hen the valve 13 is in closed position, under normal conditions the valve actuating member 21 is in the position shown in Fig. 3 of the drawings and the extremity of its finger 24 is in engagement with the shoulder 25, the spring 27 being at such time under a maximum tension. Also, the lower end of the portion 44 of the plate 37 rests upon the flange 30 of the plate 29 and in engagement with the notch 54 in the said flange, this engagement of the said portion with the flange serving to hold the plate 37 in the position shown in Fig. 1 of the drawings, or in other words, in elevated position with respect to the arm 34 against the tension of the spring 47. W'ith the parts in this position, the lug 31 engages the stop 32. Should it be desired to light the burner, the valve 13 is turned to the right or in other words, in the direction indicated by the arrow in Fig. 3 of the drawings so that the member 29 will assume the position shown in Fig. 7 of the drawings, in which position the lower end of the portion 44 of the plate 37- will rest upon the left hand end of the cam edge of the member 29, or in other words, on the edge at that end nearest the axis of the valve and the lug 31 will be against the left hand edge of the member 21 (supposing the valve to have been opened to its fullest extent). is the valve is rotated to open position, the plate 37 will be allowed to slide downwardly upon the arm 34 until its portion 45 engages or seats in a notch 56 formed in the head 15 in juxtaposition to the shoulder 25. lVhen in such position, the said portion of the plate will engage beyond the finger 24. It

will now be readily understood that should the thermostatic wire 49 contract, which would occur if the flame was extinguished, such as by being blown out, the pull exerted upon the upper endof the arm 34 will re salt in the lower end of the arm being swungforwardly or in other words in a direction away from the burner tube 11. This movement of the lower end of the arm will, of course, result in the extremity of the finger 24 being disengaged from the shoulder 25 so that the spring 27 will be permitted to rotate the valve-actuating member 21, of which this finger constitutes a part. This rotation of the said member is in a direction opposite the direction of movement of the valve to open position and inasmuch as the lug 31 of the member 29 is in engagement with the edge of the member 21, this lug will be readily engaged and the valve will be rotated to closed position, as shown in Fig. 8 of the drawings. It will be understood that the closing of the valve will result from this operation, whether or not the valve is completely or only partly open.

When it is desired to manually cut off the supply of gas to the burner, the valve is ro tated to the left of Fig. 7, it being under stood that this movement of the valve may be accomplished without disturbing the valve actuating member 21. It will further be understood that this movement of the valve will result in an elevation of the plate 37 owing to the volute form of the member 29 upon the stem of the valve so that the portion 45 of the plate will be brought to position with its lower end nearly to the upper edge of the finger 24 to such a degree that when the wire 49 contracts, the forward movement of the rocking arm 34 will not result in release of the valve actuating member. It will further be understood that the engagement of the lower end of the portion 44 of the plate 37 in the notch 54 in the flange 30 serves to hold the valve against being jarred or otherwise accidentally opened, although this engagement is not one of such positive character as to render difficult the manual opening of the valve.

In setting the trip mechanism after it has been tripped, a pin is inserted through the opening 55 and the valve is then opened to the fullest degree whereupon the resilient finger 24 will engage at its end with the shoulder 25.

As heretofore stated, the device is arranged to automatically close the valve should the thermostatic wire 49 become abnormally ex panded or fractured or disengaged from either of its supports and the manner in which this result is accomplished will now be described. The shoulder 42 of the plate 37 normally rests against the near side of the burner tube 11, as shown for example in Fig. 2 of the drawings, and should the thermostatic wire become abnormally expanded or should it become fractured, the spring 48 will be permitted to swing the arm 34 freely to the left in the said Fig. 2. In so moving, the arm would bear against the rear end of the loop 38 of the plate 37 and as this loop is above the shoulder 42 and the said shoulder is in contact with the burner tube, the plate 37 will be rocked upon the said shoulder 42 as a fulcrum. It will result in the portion 45 of the plate 37 moving forwardly to disengage the finger 24 of the shoulder 25 thereby releasing the said valve actuating member 21 and allowing the same to close the valve 13.

It will be observed that the concave edge of the lower portion 40 of the arm 34 bears against the filling 34 both when the plate 37 is raised, as in F ig. 5, and when it is lowcred, as in Fig. 7. Should the valve be manually opened when 21 is in set position, the member 37 slides down upon the arm 34 by the action of the spring 47 until the contact of the inner side of the leg 45 with the inner side of the free end of finger 24 and the contact of filling 34 with the concave edge of the arm 34 stops its further descent and it may be here said that when the wire 49 is first put in use and is cold this descent of the member 37 is very slight; but when the wire becomes heated and expands allowing 40 to move to the left due to the action of spring 48, the inclined surface of 40 allows the member 37 to descend farther, the degree of descent varying according to the degree of expansion of the wire. Thus at all times when the valve is open the inner side of leg 45 rests firmly against the finger 24 and the filling 34 has the concave edge of the lower part 4O 01 the arm 34 resting firmly against it so that Whether the degree .of expansion of the thermostatic wire be great or small, all subsequent contraction will be transmitted with no loss by looseness, when the wire contracts with the valve open due to the flame becoming extinguished.

What is claimed is 2-- 1. In a device of the class described, a burner body, a burner valve, a valve actuating member upon the stem of the Valve, a fixed projection on the burner body, the said valve actuating member having a portion engaging normally with said projection, a spring tending to rotate said member in the direction of rotation of the valve to closed position, a member fixed upon the stem of the valve and adapted for engagement by said valve actuating member when the same is disengaged from said projection, a pivoted member adapted when moved in one direction to so disengage the valve actuating member, a spring connected with the pivoted member holding it normally in one direction, and a thermostatic element connected to the said pivoted member.

2. In a device of the class described, a burner body, a burner valve, a valve actuating member upon the stem of the valve, a fixed projection on the burner body, the said valve actuating member having a portion engaging normally with said projection, a spring tending to rotate said member in the direction of rotation of the valve to closed position, a member fixed upon the stem of the valve and adapted for engagement by said valve actuating member when the same is disengaged from said projection, a pivoted arm, a member upon the arm arranged to disengage the valve actuating member when the arm is moved upon its pivot in either clirection, and a thermostatic element connected to the arm.

3. In a device of the class described, a burner body, a burner valve, a valve actuating member upon the stem of the valve, a fixed projection on the burner body, the said valve actuating member having a portion engaging normally with said projection, a spring tending to rotate said member in the direction of rotation of the valve to closed position, a member fixed upon the stem of the valve and adapted for engagement by said valve actuating member, when the same is disengaged from said projection, a pivot ed arm, means upon the arm arranged to so disengage the valve actuating member when the arm is rocked upon its pivot in either direction, a spring tending normally to hold the arm in one direction, and a thermostatic element connected to the arm.

4. In a device of the class described, a burner body, a burner valve, a valve actuating member upon the stem of the valve, a fixed projection on the burner body, the said valve actuating member having a portion engaging normally with said projection, a spring tending to rotate said member in the direction of rotation of the valve to closed position, a member fixed upon the stem of the valve and adapted for engagement by said valve actuating member when the same is disengaged from said projection, a pivoted arm, means arranged upon the arm for rocking and sliding movement and adapted to so disengage the valve actuating member when the arm is rocked upon its pivot in either direction, a spring tending normally to hold the arm in one direction, and a thermostatic element connected to the arm.

5. In a device of the class described, a burner body, a burner valve, a valve actuating member upon the stem of the valve, a fixed projection on the burner body, the said valve actuating member having a portion engaging normally with said projection, a spring tending to rotate said member in the direction of rotation of the valve to closed position, a member fixed upon the stem of the valve and adapted for engagement by said valve actuating member when the same is disengaged from said projection, a pivoted arm, a member upon the arm and adapted when the arm is rocked, a spring normally holding" the arm in one direction, the said member upon the arm moving bodily with the arm when the arm is rocked in one direction and adapted to rock upon the arm when i the same is moved in the other direction, and j a thermostatic element connected with the arm.

6. In a device of the class described, a burner body, a burner valve, a valve actuating member upon the stem of the valve, a fixed projection 011 the burner body, the said valve actuating member having a portion engaging normally with said projection, a spring tending to rotate said member in the direction ot'rotation of the valve to closed position, a member fixed upon the stem of the valve and adapted for engagement by said valve actuating member when the same is disengaged from said projection, a pivoted arm, a spring arranged to normally hold the arm in one direction, a thermo static element connected with the arm and normally holding the same against movement in such direction, and a member upon the arm arranged to disengage the valve actuating member when the arm is rocked in either direction upon its pivot, the said member being movable bodily with the arm when the arm is rocked in one direction and being movable independently of the arm when the arm is rocked in the other direction. I

7. In a device of the class described, a burner body, a burner valve, a valve actuating member upon the stem of the valve, a fixed projection on the burner body, the said valve actuating member having a portion engaging normally with said projection, a spring tending to rotate said member in the direction of rotation of the valve to closed position, a member fixed upon the stem of the valve and adapted for engagement by said valve actuating member when the same is disengaged from said projection, a pivoted arm, a spring arranged to normally hold the arm in one direction, a thermostatic element connected with the arm and normally holding the same against movement in such direction, and a member upon the arm arranged to disengage the valve actuating member when the arm is rocked in either direction upon its pivot, the said member upon the arm being movable independently of the arm when the arm is swung in that direction which the said spring tends to move it, and being bodily movable with the arm when the arm is moved in the opposite direction.

8. In a device of-the class described, a burner valve, means arranged when released to close the valve, oscillatory means arranged to rock in either of two directions to release thesaid valve actuating means, and a thermostatic element connected to the said means, said means being so arranged and constructed as to release the valve closmg means upon contraction or expansion of the thermostatic element beyond certain limits.

9. In a device of the class described, a. burner body, a burner valve, a valve actuating member upon the stem of the valve, a fixed projection on the burner body, the said valve actuating member having a portion engaging normally with said projection, a spring tending to rotate said member in the direction of rotation of the valve to closed position, a member fixed upon the stem of the valve and adapted for engagement by said valve actuating member when the same is disengaged from said projection, a pivoted arm, a thermostatic element connected to the arm, a member fitted on the arm for sliding and rocking movement thereon and having a portion cooperating with the burner tube of the valve to serve as a fulcrum upon which the member may rock, a spring normally holding the member lowered, a spring tending normally to move the arm in the direction of the said burner tube, the member upon the arm having a port-ion adapted to engage with the valve actuating member and dlsengage the same from the projection, the said member being movable bodily with the arm when the arm is moved in a direction away from the burner tube and being movable upon its fulcrum when the arm is moved toward the said burner tube.

10. In a device of the class described, a burner body, a burner valve, a valve actuating member upon the stem of the valve, a fixed projection on the burner body, the said Valve actuating member having a portion engaging normally with said projection, a spring tendin to rotate said member in the direction 0 rotation of the valve to closed position, a member fixed upon the stem of the valve and adapted for engagement by said valve actuating member when the same is disengaged from said projection, a pivoted arm, a thermostatic element connected to the arm, a member fitted on the arm for sliding and rocking movement thereon and having a portion cooperating with the burner tube of the valve to serve as a fulcrum upon which the member may rock, a spring normally holding the member lowered, a spring tending normally to move the arm in the direction of the said burner tube, the member upon the arm having a portion adapted to enga e with the valve actuating member and disengage the same from the projection, the said member being movable bodily with the arm when the arm is moved in a direction away from the upon the valve stem having a volute edge eoiiperatingwith the said member upon the arm whereby' to elevate the same when the valve is turned to closed position.

In testimony that I claim the fdregoing as my own, I have hereto affixed my slgnature 1n the presence of two wltnesses.

CAR-L A. JOHNSON. Witnesses:

H. E. BAILEY, R. W. BAILEY.

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