US2241295A - Safety pilot burner - Google Patents

Description

May 6, 1941.

J. K. CLARK SAFETY PILOT BURNER Filed May 29, 1939 3 Shae cs-Sheet 1 JwmesKCZa/rk,

May 6, 1941, J. K CLARK SAFETY PILOT BURNER 3 Shoet-Shcet 2 Filed Ma 29, 195s) 7 I 2-. 2 I a 6 L 1 |fl 5 2 r/ 6 n 0 y 1941! J; K. CLARK 2,241,295

SAFETY PILOT BURNER WWW Patented May 6, 1941 UNITED STATES PATENT OFFICE azimas' I f sm'i y rnio'r BURNER James K. Clark. New Hartford, my..- assignor to The Partlow Corp ration. New Hartford, N. Y. Application May 29, 1939, Serial No. 276,475

4 Claims, (01. 158-115) The primary object of the invention is to pro-- vide an improved pilot burner which is of maximum eiliciency in affording safety against extinguishment of the flame.

Further, the invention aims to provide a pilot burner wherein thl .flame from the burner is enveloped by a surrounding flame, which functions celaln member I and nut protruding end of electrode 6. The upper portion of the nut 8 slidingly receives thereover a ring l6, which has suitably secured thereto a series to guard or protect the main flame from lifting or being blown away, thus minimizing danger of extinguishmenti v Still further, the invention aims to increase the activity of ionization and to improve conduction of the current across the spark gap.

Further, the invention resides in the structure and organization or combination of the parts, as fully hereinafter described and claimed.

In the drawings:

Fig. 1 is a top plan view of the pilot burner, in

accordance with one form oi the invention,

Fig. 2 is a side elevation,

Fig. 3 is a section on line 3-3 of Fig. 1,

Fig. 4 is a top plan view of another form of the invention,

Fig. 5 is a side elevation, and

Fig. 6 is a section on line 58 of Fig. 4,

Fig. 7 is a top plan view of the pilot burner disclosed in my said patent,

Fig. 8 is a side elevation, and I Fig. 9 is a section on line 8-9 of Fig. '7. In the form of the invention depicted in Figs.

1-3, a hollow body 8, is provided and which. is

of substantially inverted L-shaped electrodes. The lowerends of the electrodes may be anchored in the ring is, for example by brazing or welding, as depicted. The upper ends I! of the electrodes confront one another-and overlie the tip H, being spaced therefrom and radiate from the tip in effect forming substantially a ring of metal thereabout. The ends l8 the electrodes are preferably equally spaced and due to their described arrangement, aflord positive crossing of the spark gap, in operation. The electrode carrying ring i8 by virtue of its vertical sliding movements may accordingly be adjusted to vary the width of the gap, and is flxedly held in selected position by means of a set screw is.

As illustrated in Figs. 4-6, a body 50, is provided with a porcelain insulator i, and with an insulator 52 of cylindrical form. The insulator in this instance is formed with a gas burning chamber 63 and an integral burner tip it, the base of the latter being formed with a series of preferably iour gas passages 55 to conduct gas into the chamber 58.

A pair of spaced opposed substantially U- shapedinner electrodes 5|, have their arms extending through openings provided therefor in the insulator, and their bases engaged by a coil spring 55', which latter seats on the upper end formed with a lateral nipple 2 connected to a branch 3, that in turn is connected to a raw gas source of supply. A porcelain insulator l is secured to the body by a nut 5, and is eq pped with a metal electrode ti which projects from its upper end. An insulator l of cylindrical form has an outwardly extending flange 8 at its bottom engaged by a ring nut a threaded into engagement.

with the upper end of the body I, and by virtue of which the insulator is rigidly clamped in position. i

The upper end of the insulator l is provided with an inwardly extending flange i0, through of porcelain member 5i, and engages the electrode 55 of the latter.

The upper ends-of the electrodes extend into the gas chamber ,53 and surround the gas or burner tip 54, as shown in Fig. 6. A series of outer electrodes 51, of generally inverted L-shape,

, are rigidly anchored at their lower ends to a vertically adjustable ring 58, the latter being held in adjusted position by means of a set screw 59.

' The flame z" issuing from the chamber 53, envelopes .that issuing from the tip of the burner M, and functions to prevent the flame issuing which extends a sleeve ii having a flange ii at its top that overlies the flange i0, and is clamped in position by means of 'a' nut i3, engaging the under face of the flange iii. A metal burner tip it is threaded into the outer end of sleeve I l.

A coil spring conductor i5, preferably of bronze, is interposed between the upper end of the porfrom the tip from rising or blowing away, which latter objections frequently occur when slow burning gas, such as natural gas, is used with burners of the conventional type. The electrodes 54, are formed of corrosion-resisting alloy, and due to their surrounding the burner tip, contact the outer or enveloping flame, as shown in dotted lines in Fig. 6. With this arrangement ionization is of greater activity and improved conductzlon oi the current across the gap results.

The form of the invention depicted in'Figs. 7-9,

I3, and engages the which is disposed a porcelain insulator 36 that protects a .metal electrode 31. which extends axially in the porcelain, and whose bottom end is equipped with a binding-post 38. The porcelain 36 is held in place by a gland-nut 39, which threads into the bottom opening of the body 30. In order to further insulate the high tension electrical parts of the pilot burner, an inverted cupshaped cylindrical lava part 40 whose-reduced bottom end is threaded, screws into the nipple 32, which is axial to the porcelain 38. The top end of the electrode member 31 is fitted with a spring 4!, which is capped with a washer 42 that trictionally engages the reduced lower end of a threaded metal conductor or terminal 43, having ed and the electrode 6, 5i, and 36 connected in the line i5, as disclosed in my said patent, and as indicated in Figs. 3, 6, and 9 of the instant application.

. What is claimed is:

1. A pilot burner, including a body having an insulated electrode therein, said body having .an insulator member therein formed with a gas chamber disposed above the electrode and having a burner, and further having gas passages Ior conducting gas into the chamber, a serie of in- ,ner electrodes in the chamber surrounding the an axial gas passage or orifice 44, which forms v one side of the spark gap This produces a continuous sole and free passage for the gas delivered by the branch 34. The spark gap 1: is then completed by the top end 43' of the terminal 43 and a plurality of equally spaced metal electrodes 45, which are anchored in a threaded collar or exigencies of the pilot burner arise.

By the prqvision of the relatively large number of'the electrodes 45 and the regular spacings of their free tips, a ring oi! metal is formed that alines axially with the terminal 43, and the other.

insulating supports render failure of the pilot burner practically impossible.

In each instance, the gas supply pipe is groundlate the certain crossing of the gap as the various burner, means to electrically connect the, first named electrode to the innerseries of electrodes, and an outer series of electrodes surrounding the first named, series and having free ends con-, fronting each other and disposed above the first named series with their free ends forming aringlike arrangement,

2. A pilot burner in accordance with claim 1, wherein the inner electrodes are arranged in pairs, each pair being integrally formed and of U-shape having their arms extending through openings provided therefor in the insulator member, and whereinthe means to connect the first named electrode to the inner series of electrodes consists of a coil spring disposed between the first named electrode and the inner series of electrodes and which bears against the bases of the of electrodes surrounding the first named series, 4

and means to electrically connect the electrodes to produce spark gaps.

4. A pilot burner in accordance with claim 3 where in the electrodes of the outer series have free ends located above the gas chamber and above the electrodes of the inner series.

JALEES K. CLARK.

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