US1854749A - Burner - Google Patents

Description

April 19, 1932. H. c. LORD BURNER Filed March 22, 192s fill - ure been heretofore controlled b Patented Apr. 19, 1932 UNITED STATES PATENT OFFICE application med umh 22, 192s. serial ineens.

Burners which are arranged for delivering varying degrees of heat have, in a large meascompletel shutting down the burner at intervals so that the mean out-put of the burner was of the amount desired. The present invention is designed to improve such burners by providing a burner in which the capacity may be varied to suit the requirements with a con, tinnous operation of the burner and is in many respects an improvement over the aplication filed by me, Feb. th, 1926, Serial umber 88,481, means for forming explosive mixtures and carburetor therefor. The present invention simply adapts the broader Ainvention of that application to the ordinary motor-driven burner. Features and details of the invention will appearfrom the specip cation and claim.

The invention is illustrated in the accompanying drawings as follws Fig. 1 shows a side elevation of a burner, partly in section.

Fig. 2 an end view of the burner, partly in section, on the line 2-2 in Fig. 1

Fig.-3 a section on the line 3-3 in Fig. 1.

Fig. 4 a section on the line 4-4 in Fig. 3.

1 marks th'e burner nozzle, 2 an air passage leading to the nozzle, 3- a fan delivering air for combustion, '4 a shaftion which the fan is mounted, 5 an electric motor driving the fan, and 6 an inlet passage to the fan.

A constant level float chamber 7 is connected by a fuel passage 8 with a nozzle tube 9.

- The passage 8 is controlled by a needle valve 10. The nozzle tube `9 has discharge openings 11.v These nozzle openin s discharge intoawell 12 andina be adjuste as to height by a screw 9a. The el passes from the well 12 b a passage 13 to a well 14. A tube 15 -is a justably arranged in the well 14 and is extended by means of a tube 16. The tube 16 is connected by a coupling 17 with the end of a bridge 18 arranged on the passage 2. The bridge has ,an opening 19 in continuation of the opening `of the tube 16 leading to an atomizing chamber 20 having a nozzle 21 directed into the burner nozzle 1. An air nozzle 22 is directed opposite the atomizing nozzle 21 in the usual manner of atomizers breaking up and atomizing the fuel and at the same time through the aspirating ef-` fect exhausting whatever fuel may be supplied to the well 14. It is connected by a passage 23 extending throu h the bridge with a 55 pipe 24. The pipe 24 eads from a rotaryl pump 25 having gear connections for the rotating elements of the pump and is driven from the shaft 4. It receives its air through a pipe 27 leading from the intake assage 6.

The well 14 is connected wit the intake passageby an opening 28 and the well 12 is connected with the passage by an opening 29.

r1 he openings 28 and 29 are suicient to maintain the wells under approximately the u same pressure as the intake passa e 6 so that the suction effort induced by the an is communicated to the nozzle well 12 to induce a flow of fuel in proportion to the low of air induced by the same suction effort, and the passa e 28 leading to the Well 14 prevents a distur ance as to the action of the Well 12 due to any suction effort over and above what is necessar to elevate the fuel through the pipe 16, it eing understood that the-aspirating effect of the atomizer is sufficient to discharge the maximum amount of fuel that may be fed to the well 14 through the suction effort on the nozzle 11. Ordinarily, therefore, there will be some'air drawn through 80 the pipe 16, but the opening 28 is'of such size that thev uantity drawn throu h the pipe 16y will not isturb the pressure alance in the Well 14 sufficiently to effect a pressure disturbance in the well 12. `This forms a measuring means for the fuel which assures a delivery of fuel proportioned to the flow of air.

The capacity of the burner may be controlled either by controlling the speed of the pump, or by an ordinary throttle 30. If the throttle is closed the delivery of air by the fan is reduced and consequently the suction effort is reduced in the passage 6 and the fuel supply reduced in proportion to the sup ly of air. As the throttle is opened andp a greater supply of air isdelivered a greater suction is induced and in consequence a proportionate amount of fuel is suplied. v It will be noted that any air drawn t rough the i e 24 by the umpv 25 is simply bypassed rm the inlet pgssage 6 and, therefore, adds to the extent ofthe air withdrawn throu h the suction effort in that bypass so that e fuel delivered responds to the total air drawn through the suction passage by way of the fan, or the ump. v

"Wl1at I c aim as new is In a burner, the combination of a burner nozzle; a passage leading to the nozzle; an aspirating atomizer discharging to the passa e; means comprising a fan in the passage,

said means inducing a varying flow of au through the passafge with varying pressure in the passage; a uel connection eading to the atomizer; and fuel measuring means responding to the varying pressures of the passage comprising a constant level fuel chamber containing fuel under atmospheric ressure and having a fuel discharge there om opening at a point adjacent to such constant level subjected to the pressures of the passage for varying the fuel flow to correspond to the air flow and means also subjected to the passagey pressure delivering the fuel discharge by the measuring means to the fuel connection.

In testimony whereof I have hereunto set my hand.

- HUGH C. LORD'.

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