US3406003A

US3406003A - Liquid fuel burning heaters

Info

Publication number: US3406003A
Application number: US602910A
Authority: US
Inventors: Hebard Hugh Charles
Original assignee: Aladdin Industries Ltd
Current assignee: Aladdin Industries LLC
Priority date: 1966-03-01
Filing date: 1966-12-19
Publication date: 1968-10-15
Anticipated expiration: 1985-10-15
Also published as: GB1104224A; FR1507070A

Description

Oct. 15, 1968 H. c. HEBARD 3, ,0

LIQUID FUEL BURNING HEATERS Filed Dec. 19, 1966 2 Sheets-Sheet 1 FIG]. FIGZ.

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LIQUID FUEL BURNING HEATERS FiledDec. 19, 19 66 2 Sheets-Sheet 2 M/ VENTOI? HUGH CHARLES HEBARD 3ammu ATTORNEYS United States Patent C 3,406,003 LIQUHD FUEL BURNING HEATERS Hugh Charles Hebard, High Wycombe, England, assignor to Aladdin Industries Limited, Greenford, England, a British company Filed Dec. 19, 1966, Ser. No. 602,910 Claims priority, application Ggeat Britain, Mar. 1, 1966,

69/ 6 9 Claims. (Cl. 431-307) ABSTRACT OF THE DISCLOSURE This invention relates to liquid fuel burning heaters of the kind in which an annular wick is detachably secured to a carrier capable of being raised and lowered by an externally operable pinion engaging a rack on the carrier.

A common method of fitting the wick to the carrier is to provide lugs on the latter which are moved circumferentially into engagement with sockets secured to the former. With such an arrangement it is usually necessary to dis engage the rack from the pinion and remove the wick carrier from the burner whenever the wick requires renewal, and difficulty is often experienced in replacing the car-rier due to the tendency of the lugs thereon to slip out of engagement with the sockets on the new wick.

The principal object of the present invention is to provide a wick which can be secured to the wick carrier without removing the latter from the burner and to this end, according to the invention, at least one pair of circumferentially spaced socket members are secured to the outer surface of the wick and are adapted to receive resilient members on the wick carrier movable radially into locking engagement with said sockets upon upward movement of the wick carrier relative to the wick.

A preferred embodiment of the invention will be described, by way of example, with reference to the accompanying drawings in which:

FIGURE 1 is an elevational view of a wick;

FIGURE 2 is a shortened elevational view of the wick taken at right angles to FIG. 1;

FIGURE 3 is a perspective view of a wick carrier;

FIGURE 4 is a sectional elevation of part of a burner structure incorporating the wick and wick carrier to FIGS. 1 to 3; and

FIGURE 5 is a horizontal section on the line VV of FIG. 4.

The annular wick shown in FIGS. 1 and 2 includes an upper cylindrical portion 1, the inner and outer surfaces of which are reinforced and protected by strips of adhesive tape or like material (not shown), and two separate tail portions 2 depending therefrom and which in operation extend into the fuel reservoir 3 of the burner shown in FIGS. 4 and 5 and pass between inner and outer wick tubes 4 and 5 respectively. At diametrically opposed points on the outer surface of the portion 1 of the wick there are mounted two clips 6 adapted to be engaged by the resilient arms 7 of an arcuate wick carrier 8 (FIG. 3) and each consisting of a thin metal plate shaped to fit the curvature of the wick and secured thereto by prongs (not shown) which pierce the wick fabric and are turned over on the inside thereof. Each plate is formed with a central socket 3,400,003 Patented Oct. 15, 1968 portion 9 above and below which it is embossed to provide surfaces 10 whichslope outwardly from the top and bottom and terminate in free parallel edges 11.

The wick carrier 8 accurately fits the inner surface of the outer wick tube 5 of the burner and is provided at its central portion with a vertical rack 12 which engages a pinion 13 on the inner end of a shaft 14 provided at its outer end with a knob or handwheel 15 for manual operation. Each arm 7 of the wick carrier 8 is formed adjacent its end with a raised portion 16 for engagement in the socket portion 9 of a clip 6 and an arcuate portion 17 having the same radius of curvature as the main-portion of the wick carrier.

To fit the burner with a new wick to which clips 6 have already been secured, the rack and

pinion

12, 13 is operated to lower the wick carrier 8 as far as it will go and the new wick is drawn down over the inner wick tube 4 until the clips are positioned about /2" above the upper edge of the outer wick tube 5. The tail portions 2 of the wick are then firmly grasped to prevent upward movement of the wick and the operating shaft 14 is rotated by means of the knob 15 to raise the wick carrier 8. As the latter emerges from the outer wick tube 5 the raised portions 16 on the arms 7 ride up the lower of the surfaces 10 on the clips 6 and are moved radially outward thereby until they snap into the socket portions 9. The wick carrier 8 and with it the new wick, is then lowered into the operative position in which the upper end of the carrier is wholly within the outer wick tube 5. In this position, due to the shape of the portions 17 of the wick carrier arms 7, the raised portions 16 thereof are prevented from springing out of the socket portions and the wick is thus firmly attached to the wick carrier 8.

I claim:

1. For use in a liquid fuel burning apparatus, the combination of an annular wick having fixed to its exterior at least one pair of circumferentially spaced outwardly open socket members and a wick carrier surrounding said wick having resilient arms extending in opposite circumferential directions, each arm having an inwardly projecting portion to extend within the associated socket member, said projecting arm portions and said socket members being so structurally related that said arms may move substantially radially inwardly into locking engagement with said members upon relative axial movement of said wick carrier and said wick.

2. The combination of claim 1, wherein said socket members comprise a pair of diametrically opposed socket members, each socket member being formed with an outwardly open portion and smoothly inclined portions above and below said open portion upon which said wick carrier arms ride when moving into said locking engagement.

3. The combination of claim 1, wherein each socket member comprises a metal plate shaped to the curvature of said wick and having internal attachment prongs to pierce the wick fabric.

4. The combination of claim 1, wherein each socket member is formed above and below an open arm receiving portion with surfaces which slope outwardly from the top and bottom toward said open portion and terminate in oppositely facing edges which cooperate to define said open portion.

5. The combination of claim 1, wherein each arm comprises an arcuate portion of the substantially same radius of curvature as the wick carrier axially adjacent said projecting portion, said arcuate portion inhibiting disengagement of the arm from the socket member.

6. The combination of claim 1, wherein said wick carrier comprises a centrally positioned vertical rack adapted to be meshed with a pinion for adjustment within the burner.

burning appar atus in combination with a wick carrier,.said wickcomprising two circumferentially spaced socket members, each socket member being formed with an outwardly open socket recess for engagement with an arm of said wick carrier and external smoothly inclined Wick arm guide and locking portions above and below said socket recess.

8. An annular wick according to claim 7,- wherein socket member comprises a thin metal plate shaped to fit the curvature of said wick and secured thereto by prongs which pierce the wick fabric and are turned over for attachment on the inside of said wick.

9. An annular wick according'to claim 7, wherein said socket member is formed above and below said recess with 4 v i guiding and locking surfaces'which slope outward from the top. and bottom .toward the recess and terminate in oppositely facing edges at said recess.

References Cited UNITED STATES PATENTS 5/ 1896 Welch 6760 4/1897 Nankervis 67-59 FOREIGN PATENTS 510,075 Y 4/ 1952 Belgium.

JAMES W. WEST HAVER, Primary Examiner.