US 3407023 A
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17968 E. E. HIRSCHBERG ET AL 3,407,023
MOUNTING FOR REPLACEABLE GAS BURNER Filed Jan. 5, 1967 a \fi Z I y" I! 39 mammwmm WW (Show linmhl United States Patent 01 ice 3,407,023 MOUNTING FOR REPLACEABLE GAS BURNER Erwin E. Hirschberg and Edward E. Moore, Rockford,
Ill., assignors to Eclipse Fuel Engineering Co., Rockford, Ill., a corporation of Illinois Filed Jan. 5, 1967, Ser. No. 607,571 6 Claims. (Cl. 431-328) The primary object of this invention is to provide for a hollow gas burner head a new and improved mounting which permits of convenient and low cost replacement of the burner head in service use.
Another object is to secure the burner head detachably to its mounting by the use of a tubular clamping element through which combustible gas is conducted into the burner.
A further object is to utilize the clamping tube as part of a simple flow regulating valve adjustable selectively from the exterior of the head and its mounting.
The invention also resides in the novel construction and arrangement of the parts of the regulating valve.
Other objects and advantages of the invention will become apparent from the following detailed description taken in connection with the accompanying drawings, in which- FIGURE 1 is a side elevational view of a burner head and the improved mounting with parts broken away and shown in section.
FIG. 2 is an exploded perspective view.
FIG. 3 is a fragmentary section taken along the line 3-3 of FIG. 1.
The invention is especially adapted for use in a gas burner in which an air-gas mixture is delivered through a hollow head closed on one side by a generally flat plate 11 having transversely extending pores or fine passages 12 through which the gas mixture is forced and burns at the outer surface of the plate. In so-called infrared burners, the plate is usually rectangular and most commonly composed of a porous layer of silicon carbide.
The flame plate 11 covers the open side of a hollow dish-shaped casing or manifold 14, which is an iron casting, and forms with the plate the self-contained burner head 10. Herein, the periphery of the plate is seated in an internally recessed and shouldered flange 15 of the casing and is secured thereto by cement 16 or other suitable means. To accelerate the development of the desired radiant heat, a screen 13 of a suitable alloy is disposed a short distance in front of the burner face and suitably supported from the burner head flange 15.
The bottom of the casing converges from. the flange to a central tubular hub 17 defining an opening 18 through which 'an air-gas mixture is delivered under pressure from a chamber 19 into the burner chamber 20. The chamber 19 is disposed between spaced walls 21 and 22 of a boxlike rectangular casing 23 closed at the sides and having openings 24 at opposite ends within flanges 25. The gas mixture is supplied to the chamber 19 through a pipe (not shown) coupled to one of the flanges and usually constituting the support for the burner assembly resulting from clamping the casings 14 and 23 together. The other flange may be covered by a plate or coupled to another pipe for conducting the gas to or receiving gas through one or more other interconnected burner units. The wall 21 of the casing 23 is flat and formed at the center with an outwardly opening recess 28 in which the outer end of the hub 17 of the burner head is seated in the final assembly. The head is thus centered on the casing 23.
-In accordance with the present invention, the burner head is secured detachably to the casing wall 21 (FIG. 1) by a clam-ping element which takes the form of a tube 30 constructed and arranged in the burner head mounting so as to perform additional functions including con- 3,407,023 Patented Oct. 22, 1968 ducting gas from the chamber 19 to the burner head while preserving the ready replaceability of the burner head. For this purpose, the tube is cylindrical and long enough to extend through alined holes 31 in the casing walls 21 and 22 and the hole through the hub 17 which becomes alined with these holes when seated in the recess 28 as shown in FIG. 1. Preferably, the clamping action is effected by a threaded coupling comprising a thread 32.around the inner end portion of the tube mating with an internal thread in the hub 17. A head 33 of polygonal shape is formed on the outer end of the tube and adapted to be turned to screw the tube into the hub, the manifold and burner head casings becoming clamped together rigidly when the head comes into abutment with a gasket 34 backed by the wall 22 and a gasket 35 comes between the hub 17 and the bottom of the recess 28.
Gas from the sup-ply chamber 19 is admitted to the tube 30 through one or more holes 36 formed in and angularly spaced around the tube between the walls 21 and 22 of this chamber. The gas flows inwardly along the tube and is delivered into the burner head through one or more holes 37 in an end portion 38 of the tube projecting beyond the hub 17 into the chamber 20. By closing the end of the tube at 39 and employing a series of holes angularly spaced around the tube, the gas mixture is distributed more evenly to the passages across the back of the burner plate 11.
In gas burners of the above character, it is frequently desirable to adjust the rate of flow of the gas mixture to the burner head. To this end, the clamping and gas conducting tube 30 constructed and mounted as above described is utilized as part of a valve 40 of very simple construction forming a permanent part of the detachable mounting for the burner head and easily adjustable from the exterior of the manifold casing 23 while the burner head is secured to this casing. Herein, the movable part of the valve comprises a plug 41 telescoped into the outer end portion of the tube 30 and adapted for adjustment of its inner end 42 back and forth across the holes 36. Preferably, the plug is a screw threaded into the tube with a slot 43 in its head exposed at or through the outer end of the tube after removal of a headed cap 44 also threaded into the outer end of the tube. By turning the screw head in opposite directions, the plug 41 may be advanced or retracted in the tube thus uncovering any selected part of the area of the holes 36 to correspondingly change the supply of gas to the burner head.
When it is desired to remove and replace the burner head 14, the tube head 33 is turned to retract the inner end of the tube out of the hub 17 thus releasing the burner head for convenient removal as a unit from its mounting. A new head may then be placed against and centered on the casing wall and the tube 30 screwed back into the hub thus clamping the new burner head to the casing. During such replacement, the setting of the valve 46 is not disturbed since the axial position of the plunger 41 is disposed within the tube and forms therewith a self-contained valve unit.
We claim as our invention:
1. A gas burner having, in combination, a casing defining a chamber for receiving a combustible gas mixture and having spaced walls with alined holes extending therethrough, a burner head having a back wall abutting one of said first walls around one of said holes and having an internally threaded hole smaller than and alined with the latter hole, said head having a chamber covered by a wall with passages therethrough for passing said mixture for combustion, a tube extending through said first holes and having a head at its outer end abutting said casing, means operable in response to turning of said tube relative to said casing to clamp said casing and said head into sealed abutment, while permitting removal of said head by turning and retracting said tube, and holes in said tube establishing communication between the tube and said casing chamber within the latter and between said tube and head chamber within the latter.
2. A gas burner assembly as defined in claim 1 in which the clamping of said burner head to said casing is effected by a threaded connection between said burner head and said tube.
3. A gas burner assembly as defined in claim 1 in which said burner head and casing are centered relative to each other by telescoping of parts on the two.
4. A gas burner assembly as defined in claim 1 including a plunger disposed in and closing the outer end of said tube and adjustable along the latter to vary 'the area of communication between said tube and said casing chamber and therefore the flow of gas to said burner head.
5. A gas burner assembly as defined in claim 4 in which said plunger is a screw threaded into the outer end portion of said tube.
6. A gas burner having, in combination, a casing defining a chamber for receiving a gas mixture and having spaced walls with alined holes extending therethrough, a hollow burner head having a back wall abutting one of said first walls around one of said holes and having an internally threaded hole alined with the latter hole, said head having a front wall with passages therethrough for passing said mixture for combustion at the outer face of the wall, a tube extending through said first holes and having a head at its outer end abutting said casing and threaded at its inner end into said threaded hole to clamp said casing and said head in sealed abutment, while permitting removal of said head by turning and retracting said tube, said tube communicating at its inner end with the interior of said burner head a valve hole in said tube communicating with said chamber, a valve member threaded into the outer end of said tube and projecting along the latter to dispose its inner end adjacent said valve hole, and means by which the outer end of said member may be gripped and turned to advance or retract the member and change the uncovered area of said valve hole.
References Cited UNITED STATES PATENTS 678,624 7/1901 McKallip 239-553 XR 2,302,751 11/1942 Howe 158-104 3,199,570 8/1965 Williams et a1. 158-113 XR 3,136,354 6/1964 Fitzgerald 158104 XR FREDERICK L. MATTESON, JR., Primary Examiner.
H. B. RAMEY, Assistant Examiner.