US2119820A - Burner wick and holder - Google Patents

Description

June 7, 1938. D. LUMSD EN BURNER WICK AND HOLDER Filed Dec. 21, 1955 2 Sheets-Sheet l v I .Davia flum ddezv.

d ln 1 1 I l June 7, 1938. D. LUMSDEN BURNER WICK AND HOLDER 2 Sheets-Sheet 2 Filed Dec. 21, 1935 Dal i d L amiden.

Patented June 7, 1938 UNITED STATES PATENT OFFICE BURNER WICK AND HOLDER David Lumsden, Sikeston, Mo.

Application December 21, 1935, Serial No. 55,644

1 Claim.

This invention relates to an improved burner particularly adapted for use in connection with a water heater, and one object of the invention is to provide a burner adapted to burn liquid fuel such as coal oil, the burner including a main wick and an auxiliary wick so associated with the main wick that fuel may be fed through a single pipe to both the main wick and the auxiliary wick.

Another object of the invention is to so mount the auxiliary wick that it may be very easily vertically adjusted independent of the main \vick and also removed and a new one set in place without disturbing the main wick.

Another object of the invention is to provide the auxiliary wick which serves as a pilot light with a casing formed of sheet metal and so constructed that it serves not only as a shield for the auxiliary wick but also as a tube through which oil can be fed to the pan in which the main wick is seated.

Another object of the invention is to so form the lower portion of the casing for the auxiliary wick that the wick can be very easily inserted or removed therefrom and in addition so form this lower portion of the casing that the wick can become thoroughly saturated with oil and the oil readily pass upwardly through the wick and the casing and enter the pan through side openings formed in the casing.

The invention is illustrated in the accompanying drawings, wherein Figure 1 is a view showing a burner and associated parts provided with the improved arrangement of main and auxiliary wicks.

Figure 2 is a sectional view upon an enlarged scale taken vertically through the burner along the line 22 of Figure 3.

Figure 3 is a top plan view of the burner.

Figure 4 is a fragmentary sectional view taken along the line 44 of Figure 3.

Figure 5 is a perspective view of the casing for the auxiliary wick.

In the accompanying drawings, the numeral l indicates the lower portion of a water heater in which the improved burner is mounted, as shown in Figure 1, and it will be understood that this heater may be of any desired construction which will permit water to be heated by hot products of combustion passing upwardly through the same from the burner which is mounted in the lower portion of the heater. This heater has an annular fuel pan 2 which is U-shaped in cross section, as shown in Figure 2, and open at its top. Inner and outer walls of the fuel pan carry circumferentially extending flanges or ledges 3 and 4 at their upper ends and these flanges are provided about their margins with upstanding lips 5 and 6 by means of which inner and outer combustion tubes or cylinders 1 and 8 of perforated metal are retained in place upon the ledges. The outer chimney or hood 9, which is also formed of metal, rises from a collar I!) carried by the outer combustion tube and the usual openings II are provided in this collar in order that the necessary air may enter the chimney. The main wick l2, which may be formed of asbestos or any other suitable material, is seated in the pan 2 with its ends terminating at opposite sides of an opening formed in the bottom of the pan so that fuel may enter the pan from a nipple l3 depending from the pan and upon referring to Figures 2 and 4 it will be seen that the auxiliary wick l4 extends vertically in the pan 2 between ends of the main wick. The auxiliary wick has its upper end even with the upper edge of the main wick, as clearly shown in Figure 2 and, therefore, the auxiliary wick may burn freely when the main wick is extinguished due to lack of fuel in the pan 2 and serve very effectively as a pilot to ignite the main wick when fuel flows into the pan and is taken up by the main wick. This auxiliary wick is enclosed in a tubular casing l5 which is constructed as shown in Figure 5, and formed from a sheet metal blank having meeting edge faces l5. Referring to this figure it'will be seen that from the lower end of the tubular casing there extends an arm or tongue [5 having its lower portion bent transversely as shown at I! and then upwardly to provide a tongue I8 terminating in spaced relation to the casing. The casing is of such length that when it is in place it extends from the open upper end of the trough or fuel pan 2 to the lower end of the neck IQ of the nipple l3 and the arm extends downwardly through the nipple to a point adjacent the lower end thereof. By this arrangement, the wick may become thoroughly saturated with liquid fuel in the nipple and the auxiliary wick will continue to burn as a pilot after the main wick is extinguished by lack of fuel in the fuel pan. Openings 20 are formed in the tubular casing at opposite sides thereof, as shown in Figures 4 and 5, and as these openings are located above the bottom of the fuel pan, oil may flow through these openings into the fuel pan. It will thus be seen that the tubular casing serves as a carrier for the auxiliary wick and also as a tube through which oil may be fed into the fuel pan. As the auxiliary wick is encased in the tubular casing it can be Very easily set in place or removed when necessary and also the main wick may be removed for cleaning or replacement by a new wick without disturbing the auxiliary wick.

In order to supply fuel to the burner, there has been provided a pipe 2| leading from the depending neck 22 of a cup 23 and connected with the nipple. An arm 26 projects upwardly from the pipe 2| and at its upper end communicates with an auxiliary oil cup 21 having its upper end closed by a removable cap 29. The length of time the main wick will burn after flow of oil has been shut ofi is controlled by a disc 3i of predetermined thickness placed in the cup upon supports 30.

The cup 01' chamber 23 extends upwardly above the level of the cup 21 and its cap 32 has a neck 33 with which a supply pipe 34 is connected. Oil flows from the cup 23 through the pipe 2| into the auxiliary cup 21 and also through the nipple l3 and the tubular casing l5 of the auxiliary wick into the oil pan or trough 2. A valve seat 3? is provided at the lower end of a perforated tube 35 extending vertically in the cup 23 from the passage 35 of the neck 23 and through this tube extends a stem 38 having a valve head 39 at its lower end which shuts off fiow of oil from the cup when seated against the valve seat 3?. The upper end of the stem 38 is pivoted to one end of a rocker arm 40 which has its other end pivoted to the lower end of a rod 42 constituting part of a conventional thermostat mechanism for causing the arm to move downwardly when water which is being heated attains a predetermined temperature. When the valve is closed, the main wick will continue burning until the level of the oil which is normally at the height indicated by the dot and dash line AA has been reduced to such a level that it is below the main wick l2 and this wick will be extinguished due to lack of fuel. The pilot wick will, however, continue burning and, when the temperature of the water has been reduced to a predetermined temperature and the rod 42 is drawn upwardly to move the valve 39 off the seat and allow oil to fill the auxiliary chamber 21 and the oil pan 2, the wick I2 will be ignited from the pilot wick. In order to maintain oil in the main' chamber or cup 23 at the normal level indicated by the dot and dash line previously referred to, there has been provided a float 43 which is pivoted to a hinge ear 44 and carries a spring strip 41 from which rises an upwardly extending needle valve 48 adapted to enter and close the opening 49 formed in a disc 50 which constitutes a bottom for the upper chamber 5| of the neck 33. When the float is in the raised position shown in Figure 1, the needle valve will shut off flow of oil from the chamber 5| but as the oil is consumed and the float moves downwardly the needle valve moves to an open position and allows additional oil to flow into the main chamber.

Having thus described the invention, what is claimed as new is:

In a device of the character described, a wick, and a casing for said wick having a tubular body open at its upper and lower ends and provided with side openings, and a tongue extending downwardly from said casing at one side thereof with its lower portion bent laterally under the casing in spaced relation thereto and then upwardly to provide a wick-protecting shield having a side wall extending downwardly from the lower end of the body of the casing and a second side wall spaced downwardly from the body of the casing.

DAVID LUMSDEN.

Images