US2389270A

US2389270A - Gas burner

Info

Publication number: US2389270A
Application number: US451571A
Authority: US
Inventors: Russell L Miller
Original assignee: Chrysler Corp
Current assignee: Old Carco LLC
Priority date: 1942-07-20
Filing date: 1942-07-20
Publication date: 1945-11-20
Anticipated expiration: 1962-11-20

Description

Nov: NQS. R. L. MILLER GAS BURNER- Filed July 2o, 1942 lNvENToR /QvsseZZ- L. MZZZeT. BY M, fang" M I ATTORNEYS.

burner of the Patented Nov. 20, `1945 GAS BURNER.

Russell L. Miller, Dayton, Ohio, assignor to Chrysler Corporation, Detroit, Mich., a corpora.-

tion ot Delaware Application July zo. 1942, sensi No. 451,571 l claims. 1 (ci. 15a-104)l My present invention relates to gas burners for heating appliances. '.I'he principal object of my present invention is to provide a lightweight, readily fabricated gas burner of emcient operating `characteristics. The purpose of the present invention is to provide a gas burner of the ribbon burner type made of sheet metal, rather than of cast iron as has been the custom in the past, thus saving critical materials and reducing manufacturing cost and shipy ping weight. The principal obstacle to be overcome in a construction of the type involved was that of obtaining uniform distribution ofthe gas to all burner ports. Another problem was to provide a construction which is not subject to excessive warping under fire and which would have suilicient. expansion and contractionv'freedom so as not `to fracture at joints or comers.

The objects and advantages of the present invention will be more readily understood from a study of the following specication .and drawing wherein like numerals refer to like parts throughout.

In the drawing:

Fig. 1 discloses a heating appliance with a present invention incorporated therein;

cient more or less to reduce turbulence to a .minimum and distribute the gas evenly to the various distributing troughs.

Each of the distributing troughs Itis made up .oh fiat sheets comprising parallel fiat side sheets Il welded to a sloping bottom sheet I8. The upper edges of the plates Il lie in a substantially horizontal plane parallel to the longitudinal axis of the inspirator tube and are substantially parallel to each other so as to provide parallel open'- ings lying in the same plane, Each trough holds a pack of alternate corrugated ribbons 2I and plain ribbons 22 forming therebetween a plurality oi' small orifices through which the gas escapes into the burner chamber. 'The' open mouths of the troughs are adapted to be held together by a plurality of rivets 23, the bodies of which form bridges adapted to support the packs of burner ribbons. The ribbon material preferably has the Fig. 2 is a plan view-of the burner-of the pres ent invention taken substantially alongline 2-2 of Fig. l;

Fig. 3 is a lvertical section taken substantially along line 3-t of Fig. 2:

Fig. 4 is a vertical section taken substantially along line II- of Fig. 2: and

Fig. 5 is a view similar to Fig. l of a-modiiled formvof the invention. 1

The present invention is designed to be employed in gas burning appliances such as the furnace body I0. The burner comprises a plenum chamber I2v adapted to be attached to the end oi'- a Venturi inspirator tube I3 and t0 support a plurality of parallel distributing troughsl Il. The

.plenum chamber l2 may be fabricated from sheet same coeiileient of eiipansion as the side4 plates Il so as to expand uniformly therewith. or' may kbe slightly shorter than the troughs so that solite difference in expansion may be accommodated.

A plurality of end clips 25 and 26 form the ends Vof the troughs and have horizontal portions projecting over the ends of the ribbon packs so as to retain the packs within the troug In order to prevent undue expansion diii'eren'ce between the various troughs it is preferred that the ends of the troughs I4 be capable of expanding relative to each other, and yet for rigidity it is preferred that chored to at least one other trough.` According- 1y, the end clips 26 extend across the spaces between pairs of the distributing troughs as illustrated in Fig. 2.- Thus, unequalities in expansion of one trough with respect to another may be metal plates since it is entirely rectilinear.' in

configuration. The plenum chamber is adapted to be fastened to the end of the inspirator tube by means of boltsv I5. and comprises an upwardly projecting portion I6 extending above the top of the' inspirator tubeI3 upon which are supported the plurality of distributing troughs I4. The mixture of sas and primary air admitted through the inspirator tube I3 strikes the back wall of the plenum chamber opposite the end of the tube It and is diverted upwardly into the projecting portion I6, the size of the chamber I2 beingl suitaken care of by canting of the end clip 26. but differences in expansion will not be multiplied or exerted against each other as would be the case if all the troughs were connected by one clip.

In order to achieve uniform distribution toeach of the distributor troughs the upwardly projecting portion I6 of the plenum chamber is provided with a plurality of slots 30 extending through the upper portion of the v side wall of the plenum chamber to which the inspirator tube is attached and into the adjacent portion ofthe upper wall of the plenum chamber, the volumetric center oi the opening thus formed being substantially directed along the major axis of the distributing trough which axis substantially bisects the angle between the bottom Wall I8 and the ribbon pack 2t. The center of volume oi' the gas stream owing through the opening 30 is preferably lothe end of each trough be an- Y 'cated along a smooth flow path of the gas emerglng from the inspirator tube i3 and rebounding the inspirator tubeare assured of a'steady ilow4 of gas. The ribbon packs overlie the top wall of the plenum chamber so .as to provide. a burner of maximum lengthy in a chamber of minimum size, and accordingly a plurality of perforations Il are provided in the top wall of the plenum chamber through which gas may be directed toward the portion of the ribbon pack overlying the plenum chamber. The sizes. of the perforatlons 3i are so selected with respect to the slots 3l as to direct the major portionoi the gas .stream longitudinally of the distributing trough Il,

Where, as in Fig. 5, a larger size burner is desired, the same may be provided by extending the distributor trough from both sides of the plenum chamber, the upwardly projecting portion of theplenum chamber being provided with slots' |30 similar to slots, each directing gas into an labove the top of said inspirator tube, and a plurality of 'parallel .gas distributing troughs attached to the upwardly projecting portion of said plenum chamber each of said troughs having a first portion thereof extending laterally from said one side wall and a second portion overlying said chamber, said plenum chamber having slotsl in said one wall and adjacent portion of the top wall thereof above said inspirator tube providing communication directly between the rst and second portions of said troughs and said chamber, and a plurality of perforations in the top wall of said chamber remote from the end of said'inspirator tube. in communication with the second portion of said troughs.

3. A gas burner comprising a horizontally positioned inspirator tube, a rectilinear plenum chamber attached to the egress end of the inspirator tube and having portions lying above and transversely to each side of said tube, a plurality of parallel gas distributing tubes having real' portions overlying the upper portion of the plenum chamber and projecting forwardly thereof in a plane parallel to the axis of said inspirator tube, said gas distributing tubes being connected lto the plenum chamber at the transverse side arm of the trough III., which is similar to the trough I4 in every other respect. The central portion of the trough overlying the plenum chamber H2 is provided with gas by a plurality of perfor-ations Ill similar .to the perforations 3i. Where, as in Fig. 5, the distributing troughs extend in both directions, uniform flow may be achieved by making the plenum chamber il! large -enough to reduce the velocity pressure of the gas in the inspirator tube I3 almost entirely to static pressurewhich causes escape of gas along smooth dow paths upwardly through the perforations of the plenum chamber, thus elimigniiiing turbulence differences as much as pos- Modifications in detail and arrangement of the.

present. invention should be apparent to those skilled inthe art. All such` as come within the scope of the. following claims are considereda part of my invention.

Iclaim: 1. A gas burner comprising an inspirator tube having itsaxls lying in a horizontal plane, a rectilinear plenum chamber having opposite side walls disposed in right angular relation to the longitudinal axis er sala tube, one of seid side 'Y .said upper portion, saldslots having volumetric .jecting portion of said plenum chamber and hal'- ing their upper edges lying in a horizontal plane4 parallel to andabove the axis of said inspirator tube, each oi' said troughs-having a nrst portion v thereof overlying said` chamber and a second portion thereof extending laterally from said one side wall. of said chamber, said plenum chamber having slots in 'said one side wall and'adiacent portion of the top wall thereof above said inspirator tube in communication with said nrs and second trough portions. 1

2. A gas burner comprising an inspirator tube havingitsaxislylnginahorizontalplane,arec tllinear plenum chamber having' longitudinal side walls disposed transverse to the longitudinal axis of said tube, one of said side walls being attached to the egress end of 'said inspirator tube, said chamber having a thereof projecting portions thereof and intermediate said portions, spaced slots formed in the plenum chamber in theupper portion thereof to provide communication between the chamber and each of said gas distributing tubes, the volumetric centers of said slots being directed substantially along the longitudinal axes of said gas distributing tubes, and openings formed in the upper portions of the gas distributing tubes for the escape of the gases flowing therethrough. i

4. A gas burner comprising a horizontally positioned inspirator tube, a plurality of gas distributing tubes positioned in spaced parallel relation in a plane parallel to andy overlying the longitudinal axis of the inspirator tube, said gas 'end of the inspirator tube and the rear ends of the gasdistrlbuting tubes, and slots formed in centers lying substantially in an axis bisecting the angle between the top and bottom walls of -each of said gas distributing tubes.

5. A gas burner comprising a horizontally positioned inspirator tube having an egress end, a -lenum chamber connected to said egress end 4and having an upper portion lying thereabove, a

plurality of spaced gas distributing tubes extending outwardly from the upper portion oi' the -plenum chamber, said gas distributing tubes having top perforated surfaces lying in a plane parellel to the longitudinal axes of the inspirator tube-said plenum chamber being. formed with slots in its upper portion to direct gases from the inspirator tube into and along the distributing tubes, said slots having volumetric centers 1o lying substantially ln the longitudinal center lines of said gas distributing tubes, and clip members connected across the outer' free. ends.

of pairs ofadiacent gas distributing tubes.

l Russell-I.. r.. isn-Lan.