US2295784A - Gas burner - Google Patents

Description

P 1942- 'H. E. HANDLEY 2,295,784

GAS BURNER Filed July 27, 1938 4 Sheet s-Sheet l INVENTOR. HAROLD E. HANDL EV ATTORNEYS v & M 2 .mm W 7 a m s, m W 5 w M 1 A 2 a E m 0, s m- 4 M H mm H. E. HANDLEY GAS BURNER Filed July 27, 1958 Sept. 15, 1942 P 1942- H. E. HANDLEY 2,295,784

GAS BURNER Filed July 27, 19 38 4 Sheets-Sheet 4 HAROLD 5 HANDLE) 7 4L 41, 41 @544 ATTORNEY5.

Patented Sept. 15, 1942 UNITED STATES PATENT OFFICE mamas oasauauaa' Harold E. Handley, Jackson, Mich, aasignor to Handley Brown Heater Company, Jackson. Mich, a corporation of Michigan Application July 27, 1938, Serial No. 221,469

'lClaims.

t a regular central house heating plant especially during those months when a continuous fire is not needed and the firing of solid fuels becomes troublesome and inefficient.

An object. of the present invention is to provide a gas burner which may be installed-or removed at will by the householder with a minimum amount of trouble on his part, and without the necessity of detail knowledge of gas burners and gas combustion.

A further object of the invention is to provide a burner which may be adjusted for maximum combustion efllciency and which is so arranged that the householder may readjust it to the same position when converting his heating plant from a solid fuel burner to agas burner. A further object of the invention is to provide a burner which has a burner head so designed that the application of heat to the furnace is most beneficial.

An additional object of the invention has to do with the details of the design of the burner head used and also with the arrangement of a pilot light and thermostatic control which will permit opening of the main gas inlet only at specified times. Additional safety features have to do with an arrangement whereby the pilot light only may be lighted when the auxiliary closure member for the furnace door is not in closed position.

Other features and objects of the invention have to do with retails of construction which permit the burner to be used with any type of heating plant without the necessity of drilling and tapping numerous holes and fitting each particular burner to an installation. Another important feature has to do with the adjustability of the burner head which permits one burner assembly to be adaptable to various sized heating plants.

Other features and objects of the invention have to do with details of construction and operation which will be set forth in the following specification and claims.

In the drawings:

Fig. 1 is a perspective view of the burner. assembly illustrating the various details thereof.

Fig. 2 is a side view of certain of the safety arrangements in connection with the burner gas supp y- Fig. 3 is an illustration of the reversed side mechanism for holding the same in a furnace opening.

Fig. 4 is a detail partial section showing the manner in which the closure member engages the furnace opening.

Fig. 5 illustrates a side view of the burner head.

Fig. 6 illustrates the burner head with the thermostatic arrangement and pilot light.

Fig. '7 is a cut away view of the furnace showing the gas burner in operation, particularly the action of the flame.

Fig. 8 illustrates the gas burner in storage position.

Figs-9 is an illustration of a damper setting mechanism which permits a predetermined ad- Justment to be maintained.

Referring to the drawings, in Fig. 1, the main elements of the assembly are shown. They consist of a burner head II, a supply pipe II, a closure member comprising a stationary portion l2 and a movable portion l3, and a valve II for controlling the inlet of gas to the supply pipe. Fig. 7 illustrates the relation of the burner assembly to a furnace A having a fire-pot B.

We consider first the details of the burner arrangement in connection with a safety thermostatic control and pilot valve. The supply pipe i I is a hollow tube which is provided at its outer end, Figs. 1 and 2, with a mixing chamber II, and at its inner end with a distributing housing l8 upon which is mounted the burner head III. A gas inlet is shown at l1 and this inlet is the entrance to the control valve M which is a constant bleed type of valve. This constant bleed valve is of the type in which a diaphragm controls a valve member to open and close a passageway extending through the valve. A chamber is provided above the diaphragm which is normally open to the gas in the valve inlet and which is bled through a separate passageway it to the mixing chamber ii. If, for any reason, this passageway II is closed, pressure will build up above the diaphragm and cause the gas to be cut off. Bince this type of valve is well known in the art, it has been considered unnecessary to illustrate the details thereof.

A pipe I! leads from the outlet of the valve H to the mixing chamber l5 (Fig. 2). A needle valve 2| is threaded into an inlet housing 2| within the mixing chamber to regulate the flow of gas from the pipe I! to the mixing chamber II and the pipe II. The inlet housing 2| extends beyond the end of the mixing chamber I! and is of the auxiliary closure member showing the threaded so that a shutter plate may be adjustably positioned thereon to control the inlet of primary air to the mixing chamber and supply pipe. A cap 23 covers the end of the extension 2| and may be removed to permit adjustment of the needle valve 20.

Consider now the burner head It). It will be seen that the burner head is substantially triangular in shape with the apex of the triangle at the bottom and the base of the triangle at the top in a substantially horizontal position. The

' burner may perhaps best be described by referring to it as two triangular wing portions 24 and 25 which spread from a common side at the center and point away from the pipe Each outer edge of the wing portions 24 and 25 which slants down toward the apex of the triangle, is provided with apertures or burner ports 25 where the flame of the gas burner originates. Referring to Fig. 5, it will be seen that the burner may also be inclined in such a way that it slants back from the top to the bottom when viewed from the side. The resulting flame from the burner is shown in Fig. 7. It will be seen that the flame flows around the fire-pot and wipes the sides thereof in more or less of a horseshoe form. This insures most efflcient use of gas which is burned.

Referring to Fig. 2, it will be seen that a valve 21 is positioned directly beneath the inlet ll of the main valve l4. This is a pilot gas shut-off valve and is open to the inlet II. Leading there-.

Fig., 6). A thermostatic unit 32 is positioned directly adjacent the pilot tube 3| and it is so arranged that a movable rod in a tube 33 will actuate a switch 34a in a control box 34 to open or close the same depending on the position. of the thermostatic unit 32.

In the top of the valve I4 is located a thermostatic snap disc unit 35, Fig. 2, which actuates a normally spring closed valve 33 in the bleed line l8. The snap disc is heated by a small electric coil, (not shown). These units are known as "Klixon units and ar well known in the art.- When the snap disc is actuated, that is, connected with the current, the valve 35 in the bleed line |8 will be open, and consequently gas may flow through the valve H. An electri conduit 40 connects one pole of the snap disc nit 35 with one pole of an electrical source, and conduits 4| and 42 lead'iiom another pole of an electrical source through the switch 34a in the control unit 34 to the other pole of the snap disc unit in the valve 14. A room thermostat 4la, shown diagrammatically, is also interposed in the line 4|. When the pilot is lighted, the thermostatic unit 32 will be expanded by the heat thereof and the switch 34a will be closed. If room temperature is down so that the thermostat 4|a is calling for heat, the switch in the unit 4|a will be closed. Electric current will then actuate the snap disc unit 35 and valve 35 in the valve l4 and open the bleed line 8 so that pressure will not develop above the diaphragm in the valve l4 to close the valve. Gas may then pass through the valve M to the mixing chamber l5 and the supply pipe II. If the pilot light goes out it will be impossible to light the burner head I0 since the switch 34a.

will be open and the bleed line |8 will consequently be closed by the valve 35. Pressure then develops above the diaphragm in the valve H to close the same. Similarly, when room temperature rises to a point where the switch in the thermostatic unit is opened, the bleed line l3 will be closed and gas is no longer furnished to the burner head.

Consider now the mounting of the burner assembly in the furnace. The door panel member which is adapted to serve as an auxiliary closure for the normal opening in the furnace A consists, as previously indicated, of a stationary portion-I2 and a portion |3 hinged thereon. Door panels may consist of flat pieces of flreproof ma- .terial suitably adapted to this use. on the door piece I2 is mounted a flange 43 having apertures for receiving the supply pipe H and the auxiliary pipes 29, 30 and 33. Set screws 44 are tapped in the flange 43 to lock the pipe H in the proper position, Fig. 8. A figure-8 opening 45 is shown in Fig. 3 to permit the pipes to pass therethrough. Apertures 45-, shown in Fig. 3, are covered by a movable secondary air door 41 which may be adjusted in various positions by a screw 48.

Brackets 49 are shown at the bottom edge of the door piece l2 and these are adapted to rest upon the lower edge of the furnace door opening. A screw 50 extending through a lug 5| is adapted to be positioned to contact one side of the furnace door opening. Substantially aligned with this screw 50 is a short rod 52 slidable in a guide 53. A lever 54 is pivoted in the flange 43 and extends therethrough to the other side (see Figs. 1 and 3). This lever 54 is adapted to be controlled by a thumbscrew 55 and is attached at its inner end to the bar 52 so that, by moving the thumbscrew 55', a contact block 55 at the end of the rod 52 may be moved toward or away from the edge of the door piece l2. The contact block 55 is adapted to abut the side of the furnace door opening so that when the,thumbscrew is turned the head of the screw 50 will contact one side edge of the door opening and the block 55 will be pressed firmly against the other side of the door opening (see Fig. 4). The closure member isthus held in place by frictional contact with edges of the door opening. Once the piece l2 of the closure member is fastened securely in the furnace opening, the set screws 44 may be loosened and the burner head may be adjusted to its proper position in the furnace by moving pipe II in or out and re-tightening the set screws 44.

In Fig. '7 the burner assembly is shown in its operative position. A flexible hose 51 connects the inlet I! with a gas pipe 53 in which is located a shut-ofi valve 59. With the burner assembly in position, it will be seen that a regular door 50 of the furnace A is aiar.

To permit lighting of the pilot, the piece H is hinged to the piece 12 so that it may be opened outward to permit access to the inside'of the furnace. A spring clip 5|v serves to keep the door portion l3 in closed position.

Referring now to Fig. 2, it will be seen that in the bleed line I8 is a valve 52 from which extends a safety shut-off rod 53. This rod is v pivotally fastened to an angle 54 on the face of ously described, the closing of the bleed line l8 will cause pressure to build up above the diaphragm of the valve 14 so that valve M will be closed thus cutting oil gas to the burner. Consequently, when the door I 3 is open, it will be possible to light the pilot flame but there will be no danger of the main flame lighting at the same time.

In Figs. 7 and 8, a hook 65 is shown on the outside of the furnace to permit hanging of the entire bumer assembly on the furnace A when it is not in operation.

In Fig. 9 is illustrated a portion of the chimney flue in which the damper is located. A handle 66 controls the damper. On the damper rod 66a is a lug 61, which is adjustable. On the pipe is a fixed lug 68 having a portion 69 for contacting the lug 61. When the burner is installed the lug 61 is positioned so that when the damper is moved to a position where lug 61 contacts the portion 69, the damper is in the proper position for gas burning.

When the householder desires to convert his furnace from a solid fuel burner to a gas burner, he first rakes the fire-pot B to cover the grates with a fairly thick layer of ashes. The burner assembly is then inserted into the furnace opening and the panel l2 secured therein by tightening the thumbscrew 55. Next the damper handle 66 is turned so that the lug 61 contacts the lug 69. The damper will then be adjusted for gas burning.

The valve 59 may now be turned on, the door l3 opened and the pilot tube 3| lighted. In order .to light the pilot, it will be necessary to make sure that no ashes contact the lower portion of the burner head Hi. When the pilot is lighted, the door l3 may be closed. As soon as the thermostat unit 32 becomes heated by the pilot light,

. the switch 34a will be closed. If the room thermostat Ha is also cold, the thermostatic snap disc unit 35, controlling the valve in bleed line I8, is actuated so that bleed line l8 will be open. Gas may then pass through the valve H to the mixing chamber I and the burner head Ill where it will be ignited to form a sweeping flameas shown in Fig. 7.

What I claim is:

l. A gas burner assembly to be used in connection with the fire-box of a building heating unit including an auxiliary closure member for the fire-box opening of said heating unit which comprises a stationary portion adapted to be temporarily and removably mounted in said fuel opening by a thumbscrew operated mechanism, a movable door portion mounted adjacent said stationary portion adapted to open to permit access to the interior of said heating unit, and a gas burner comprising a supply pipe passing through and adjustably mounted in said stationary portion of the closure member connected at its outer end to a combustible gas supply and having a burner outlet member formed at the inner end thereof.

2. A gas burner unit to be used in a building heating device -which comprises an auxiliary closure member for the normal fuel opening of said unit, means on said closure member for removably locking said closure member in the normal opening of said heating device comprising a member for abutting one side of said opening, and a member movably positioned on said closure member whereby it may be moved into contact with another side of said opening to frictionally position said closure member therein, and a burner unit projecting through and supported in said closure member.

3. A gas burner unit to be used in a building heating device which comprises an auxiliary closure member for the normal fuel opening of said unit, means on said closure member for removably locking said closure member in the normal opening of said heating device comprising members movably positioned on said closure member and adapted to contact opposing sides of said opening to frictionally position said closure member in said opening, and a means on the outside face of said closure member operably connected with at least one of said movably positioned members to move the same toward and away from a side of said opening, and a burner unit projecting through and supported in said closure member.

4. A gas burner unit to be used especially for light loads in a building heating device which comprises an auxiliary closure member for the normal fuel opening of said unit, means on said closure member for removably locking said closure member in the normal opening of said heating device comprising members for abutting the lower edge of said opening to position said closure member vertically, a member for abutting one side of said opening, and a member movably positioned on said closure member whereby it may be moved into contact with another side of said opening to frictlonally position said closure member therein, and a burner unit projecting through and supported in said closure member.

5. In a gas burner conversion unit adapted to temporary use in a solid fuel heating unit, a supply pipe, a support therefor, and a triangularly shaped burner head mounted on said pipe having one horizontal side and two vertically disposed sides and having gas outlets formed in the vertically disposed sides thereof, whereby a gasflame may be directed around the sides of a flrepot in said heating unit.

6. In a gas burner conversion unit adapted to temporary use in a solid fuel heating unit, a burner member projected through and supported by the walls of said heating unit comprising a burner head formed as a triangularly shaped piece including two wings inclined forwardly from the center of said head and provided with burner ports at the outer edges thereof whereby a gas flame may be directed around the sides of a iirepot in said heating unit.

7. In a gas burner conversion unit adapted to temporary use in a solid fuel heating unit, a burner member projected through and supported by the walls of said heating unit comprising a triangularly shaped piece mounted with an apex of said triangle ointing downward and formed of two wings inclined forwardly from the center of said piece and provided with burner ports at the outer edges thereof adjacent the lower apex whereby a gas flame may be directed around the sides of a flrepot in said heating unit.

HAROID E. HANDLEY.

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