US2501396A - Oil burner with preheating and igniting means - Google Patents

Description

March 5 H. J. LE cLERc El AL 5 3 OIL BURNER WITH PREHEATING AND IGNITING MEANS Filed Nov. 19, 1947 2 Sheets-Sheet l Fig.

Henry J. LeC/erc Phil/1a J. LeC/erc INVENTORS D |||l| ||||l 0D 0 O O 0 D D D 0 o 0 O O O D O o O o 0 0 0M0 0 0 M0 0 0 O M O 000 0 0 0 0 0 0 March 21, 1950 H, J LE c c Er AL 2,501,396

OIL BURNER WITH FREHEATING AND IGNITING MEANS Filed Nov. 19, 1947 2 Sheets-Sheet 2 I n wen to r5 Henry J. LeC/erc Philip J. Le Clerc By M 5 Patented Mar. 21, 1950 OIL BURNER WITH PREHEATING AND IGN ITIN G MEAN S Henry J. Le Clerc, Cambridge, and Philip J. Le Clerc, West Medford, Mass.

Application November 19, 1947, Serial No. 787,010

1 Claim. 1

This invention relates to new and useful improvements in oil burners and the primary object of the present invention is to provide a wickless automatic lighting oil burner.

Another important object of the present ininvention is to provide an oil burner including a heating unit and an igniter, and embodying novel and improved means for simultaneously energizing the heating unit and the igniter.

A further object of the present invention is to provide an oil burner including novel and improved burner sleeves so designed as to direct a flow of heat through the same with the maximum efficiency.

A still further aim of the present invention is to provide an oil burner that is simple and practical in construction, strong and reliable in use, neat and attractive in appearance, small and compact in structure, relatively inexpensive to manufacture, and otherwise Well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a diagrammatic view showing the present oil burner applied to a source of fuel, and with parts of the burner shown in dotted lines;

Figure 2 is a similar view of Figure 1 and with parts of the burner broken away and shown in section;

Figure 3 is a transverse horizontal sectional view taken substantially on the plane of section line 33 of Figure 2;

Figure 4 is an enlarged fragmentary vertical sectional view taken substantially on the plane of section line 4-4 of Figure 5;

Figure 5 is an elevational view of the burner sleeves and fuel pan spaced relative thereto, and with parts of the sleeves and fuel pan broken away and shown in section; and,

Figure 6 is a transverse horizontal sectional view taken substantially on the plane of section line 66 of Figure 5.

Referring now to the drawings in detail, wherein for the purpose of illustration, there is disclosed a preferred embodiment of the present invention, the numeral Ill represents an annular heating unit having an upstanding flanged portion I2. Annular channels I4 and I6 are provided in this heating unit Ill and receive heating elements or coils I8 and 20 that are con- 2 nected to each other at one end. The free ends of these coils I8 and 20 are connected to depending terminals or posts 22 and 24 that extend beneath the unit I0.

An arcuate hollow rib 26, integrally formed at the bottom wall of the heating unit I0, is disposed between the channels I4 and Hi. The ends of the rib 26 are in spaced opposed relation to form a passage between the'channels I4 and I 6. The rib 26 is provided with a plurality of circumferentially spaced openings 25 that register with circumferentially spaced openings 21 provided in an arcuate hollow upstanding rib 28 forming part of the bottom wall of an annular oil pan 30.

The oil pan 3!] is supported on the heating unit I0 and the annular flange portion I2 embraces the oil pan 3!) as shown best in Figure 2 of the drawings.

The oil pan 30 is provided with a central flanged portion 32 having an annular inner shoulder 34 that receives the lower edge of an inner perforated sleeve 36, an inner annular oil receiving channel 38 that receives the lower edge of an intermediate perforated sleeve 40, an outer annular oil receiving channel 42 that receives the lower edge of a further perforated intermediate sleeve 44, and an annular outer shoulder 46 adjacent its outer annular flange 48 that supports the lower edge of an outer perforated sleeve 50.

Fixedly positioned in the bottom wall 52 of the oil pan 30 and in the interrupted portion 53 between the spaced ends of the channel 28, is a carbon trapping leg 54 having an inlet nipple 56 that is connected to a conduit 58 leading from a conventional electric time clock and oil valve mechanism 50. The blind bore or chamber 62 provided in the carbon trapping leg 54 communicates with the oil receiving channels 38 and 42, so that oil entering the chamber 62 from the conduit 58 will enter the oil pan.

Removably carried by the outer sleeve 50 is an electric igniter 64 that is connected to one terminal 66 of the mechanism by an insulated wire line 18 leading from the sump or supply pan 80 of an elevated oil tank 8.2, and the plug 84 carried by the electric cord 86 of the mechanism 60 is inserted into a usual electric outlet. The electric time clock in mechanism 60 will be actuated to simultaneously energize the coils i8 and 20 and the igniter 64. The valve in the mechanism 60 will remain open at all times to permit a flow of fuel into the oil receiving channels 38 and 42. The heating coils l8 and 20 and igniter 64 will remain energized for a predetermined period of time to preheat the oil in the channels 38 and 42 so that vapor formed from the oil in the oil pan will be ignited. Once the oil in the pan has been ignited, the time clock in mechanism 60 will shut off the current, as the heat prevalent in the sleeves and the oil pan will be sufiiciently heated to efficiently ignite the oil without having to retain the heating coils energized after the initial operation.

Having described the invention what is claimed as new is:

An oil burner comprising an annular heating unit having inner and outer annular walls, an arcuate rib provided between the inner and outer walls of said unit and dividing the same into inner and outer channels, said rib having a plurality of circumferentially spaced openings, the ends of said arcuate rib being in spaced opposed relation to form a passage between said channels, a resistance heating coil having a portion positioned in said inner channel and having one end anchored in said inner channel, said heating coil extending through said passage and having a portion positioned in said outer channel,

the other end of said heating coil being anchored in said outer channel, an annular oil pan having a concentric arcuate and hollow upstanding rib, the hollow rib of said oil pan having a pinrality of circumferentially spaced openings registering with the openings in said first named rib, a carbon trapping leg carried by the oil pan and received in the passagebetween the ends of said first named arcuate rib, an inlet conduit connected to said carbon leg, an igniter carried by said oil pan overlying said carbon leg, a

plurality of perforated, concentric sleeves rising from said pan, said heating unit and said pan having opposed, central openings, said carbon trapping leg including a cylindrical memher having a blind bore communicating with the REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Date Number Name 2,056,146 Sherman Sept. 29, 1936 2,291,441 Avampato July 28, 1942 2,458,630 Palko Jan. 11, 1949

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