US1723180A - Gas burner - Google Patents

Description

Aug. s, 1929. H, E, KERR 1,723,180

GAS BURNER Filed Apri; 29, 1926 (gn/vento@ H. E. KERR.

Patented Aug. 6, 1929.

UNITED STATES 1,723,180 PATENT OFFICE.

may E. nim, or cLnvELmnoin'o, AssIGNon To rim cLEvELm eas BURNER a Annunciaconrm, or CLEVELAND. omo, A conronnon or omo.

GAS BURNER.

Application mea April as, 192e. serial n. 105,436.

bottom of which isuished and finishaiv My invention relates to an improvement in gas burners, and in general my 'object is to provide a small burner or burner unit adapted to produce a spreading blue flame 5 which .may be used with efficiency in small heating appliances, such as coffee urns, ovens, cook stoves, gas ranges, and other heating apparatus in which a circular sheet of fla-nie may be advantageously applied to l a superposed object.

In the accompanying drawing showing the preferred embodiment of my invention, Fig. i

i 1 is a top view of the burner cap, and Fig. 2

a perspective view of the prong member l used to support saidburner cap. Fig. 3 is a bottom View of the prong member and cap assembled, and Fig. 4 is a side View thereof. Fig. 5 is a side elevation of the mixing tube for the burner alixed to a supply pipe coupling. Fig. 6 is a sectional view of the complete burner mounted upon a supply.

pipe. v

The invention comprises a relatively small tube 2, preferably of brass, having a hexagonal enlargement; 3 at its lower end in which a cross-port 4 intersects the lower end of an axial bore 5 extending the major length of the tube; Thelower extremity 6 of tube 2 is screw-threaded to permit attachment to a suitable base member 7 which in the present instance is shown as screwed to a pipe coupling 8 through which gas may be supplied. A short gas orifice 9 is provided axially in the base of the tube, the diameter of which is such that a' fine stream of gas is jetted under normal pressure through the tube and to a substantial distance beyond the mouth thereof. This stream of gas entrains a certain amount of air through the lateral ports 4, which entrained air is suilicient to maintain a small blue flame at the mouth of the tube when the gas pressure is-reduced or turned down low compared with normal n pressure operations. Then the gas is turned on full and discharged through orifice 9 under normal pressure the force or velocity of the gas stream is such that a constant flame cannot be maintained opposite .the mouthV of the tube unless the gas is intercepted and mixed with additional air. Briefly, the gas will blow out. Having this characteristic of the gas discharge tube in mind, I provide an intercepting plate or battle member 10 the axis of which is coincident with the axis of the tube and the smoothly. That is the bottom 11 of the plate opposite the mouth of the tube is preferably concaved and rounded and finished 'smoothly to merge with an upwardly curved or rounded edge 12 of the plate. T hls plate is' also spaced a predetermined distance beyond the mouth of the tube, the

spacing means in the present device comprising a skeleton frame having forked arms or prongs 14 extending on diverging lines from an angular body part 15 having'a central opening to permit this part to be sleeved over tube 2 in rest position upon enlargement 3. The dished element or plate 10 is a separate cast iron member preferably, which is securedto the diverging arms IJr prongs 14 as followsi'lhus the plate is provided with notchees 16 'at uniformly spaced intervals radially at its edge, which notches correspond in number and position to the radial arms 14, and each arm vhas a curved seat1 i7 opposite a reduced extremity 18 adapted to occupy notches 16. Arms 14 are made of malleable metal and when the plate is seated upon the arms the extremities 18 are bent inwardly to effect clamping engagement against the rounded portion 19 of the notch in plate 10, as shown in Fig. 6, thereby locking the vplate rigidly upon the arms.

' In operation, the gas .Y which is jetted through the tube strikes the center of the smooth round cavity or recess in the bottom of the plate and the gas is caused to spread radially in all directions toward the edge of the plate. Before escaping a thorough inter- Y around the edge of the ring. When the gas is turned down and the Vvelocity of the stream of gas is not sufficient to cause the gas to strike the plate, suflcient air is taken in at ports 4 which is mixed with the stream of gas as it issues so that a blue iame will be maintained at the mouth of the tube. gas may be turned down, or the pressure may drop so that a mere bead of flame may be maintained at the mouth of the tube, without back-fire, and the cap or plate covers the mouth of the tube completely and pro-- tects it from` drippings or overflow from a vessel exposed to the flame.

A single burner or unit has been shown in the drawing, but obviously a series of such The head or various styles of manifolds if 'desired for use in portable bake ovens, doughnut stoves, etc., and the gas may be ed intol either the side or bottom of the base member 5 or coupling for the burner tube. The prong member may be made of malleable iron or bronze, While the plate may be made of automobile cylinder iron, or any other suitable metal adapted to withstand high temperatures. The cap or plate is mede separate from its skeleton supporting mem-v ber to permit the respective parts to be made of dierent materials and to permit the round surface of the cavity o1' pocket to be smoothly finished What claim, is:

l. A gas burner? comprising an air and gas commingling tube of small cross section having air orices of restricted aree therein,. Hand adapted to ]et under no1-mal ges pressure a stream of ges yand air a substantial distance beyond the mouth of the tube, a forked member sleeved upon said tube having notched edges and a small circular plate detachably clamped between the notched edges of said forlted member, said plate being formed with a smooth centrally concaveshaped bottom encircled by a convex-shaped zone. 4

2. A gas burner, comprising an air and gas commingling tube of small cross section and with air orifices of restricted area, a member having diverging arms extending angularly from said member beyond the mouth of said tube, notches at the free end of said diverging arms and a small circular plate detachably clamped between said arms, said plate being formed With a concave central bottom portion extending into a convexshaped zone.

ln testimony whereof affix my signature.

HARRY E. KERK.

Images