US1625992A - Gas burner - Google Patents

Description

April 26, 1927. 1,625,992

H. M. GODSEY GAS BURNER Filed Sept. 14, 1925 ggl I l i -I--- Patented Apr. 26, 1927.

UNITED STATES E. MITCHELL GODSE Y, OF SHREVEPORT,

IiOUISIANA, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO GODSEY-MURPHY COMPANY, INC.

GAS BURNER.

I Application filed September 14, 1823. Serial No. 682,773.

My invention relates to appliances for burning gas efliciently and economically in boiler or other furnaces for which it is suit;

able. It relates more particularly to an appliance for burning natural gas of a heat value approximating one-thousand British thermal units per cubic foot, although it may be suitably proportioned to handle any fuel gases of other heat values satisfactorily.

An object of the invention is to provide a burner with which the greatest economy may be produced with the use of gaseous fuels, and such economy maintained permanently by the use'of the simplest means possible to be provided for attaining the highest furnace efiiciencies.

A further object of the invention is to provide a gas burner which embodies the reatest simplicity of construction and therey reduces the cost to manufacture to the lowest minimum. a In the accompanying drawing, Figure l is a longitudinal section along the line AA of Figure 2. Figure 2 is a plan, and F igure 3 is an end or front elevation.

The numeral 1 represents a block, preferably of cast iron, which is the main body of the burner, and 2 refers to mixing tubes, preferably of the Venturi type so as to produce the best air inspirating and mixing effect. The latter are represented in Figure 2 by dotted lines and are to be cast or shaped integral with and through the block 1. Nu-

meral 3 is a hollow chamber which extends in length the entire width of the tube block and is joined to the latter by members t at each end of the chamber and side of the block, being cast or formed between the chamber and block in such a Way as to hold these rigidly in place and leave an open space for the entrance of air from above and below the burner, the block and chamber and this member being preferably cast in one piece to form or constitute the burner as a whole. Numeral 5 refers to small gas ports or orilircs drilled through the front wall of the chamber '3 and opposite the center of each mixing tube 2, and 6 are ports or openings at each end of the chamber, preferably round and tapped with suitable pipe threads in order to connect the main gas supply pipe to the burner chamber at either or both ends. Numeral 7 represents passages of some convenient form and size (shown only in Figure 3) formed in the block 1, and adapted .fices 5. The latter being proportionately to conduct secondary air through the burner mto the furnace and to points adjacent the burner ports; and 8 refers to the space or opening between the chamber and block for the entrance of both primary and secondary air.

In operation, gas enters and fills the chamber 3 through either one or both of the ports 6 and is allowed to escape through the orivery small in comparison to the volume of gas entering and filling the chamber 3, pressures may be rapidly built up in the latter. Any appreciable pressure measured in inches of water built up in chamber 3 will cause a relatively high velocity of flow through the orifices 5 and into the tubes 2, which will create the well known Bunsen effect of mixmg the gas and air into a highly combustible mixture so that the latter, when ignited, burns at the end of the tubes with the characteristic blue flame of a well proportioned gas and air mixture.

As it is practicably impossible to construct a gas burner of this type so proportioned that under all conditions of gas pressures and furnace drafts the flame will not either tend to flare back and burn inside the burner or leave the end of it entirely, without the use of so-called secondary air, I have provided the air passages 7 (shown only in Figure 3) which extend through the tube block parallel with the tubes, in order to allow a sufficient supply of secondary air to flow to points adjacent the outer ends of the mixing tubes, or to the burner ports in addition to the primary air drawn in through the burner tubes. Such secondary air has the effect of balancing the mixtures with the rate of flame propagation, thereby stabilizing the flame at the end of the burner.

In the drawings I have shown a convenient size or arrangement of the tubes and air passages for an eight tube unit. One of these units may be used on a furnace if found sufiicient by connecting the gas supply line to one end and plugging the other, or it. may be connected into both ends; or two or more units may be connected together by suitable pipe fittings in order to form a set or one large burner to be controlled by one valve. It is to he understood. however, that these units'may be varied in this respect by being built to form any number of pairs of tubes such as two, four, six, eight and twelve no tubes to the unit; and that the particular arrangement as shown in .the drawing will not be strictly adhered to, and that the following claim specifically states what my in- 5 vention actually constitutes.

I claim:

A as burner comprising a block, a gas chamber adapted to receive a gaseous fuel and supported in spaced relation to the inner end of said block, the space between said block and said chamber being open to the atmosphere, said block having a plurality chamber adjacent said air space and directed towards the inner ends of said Venturi passages to discharge streams of gas through the space and into the Venturi passages.

H. MITCHELL GODSEY.

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