US2625149A - Gas range - Google Patents

Description

Jan. 13, 1953 I G.\o. Y( aALJfQwAY GAs RANGE Filed Jan. 28, 1948 www IN VEN TOR.

@iA/EY Patented Jan. 13, 1953 GAS RANGEV Glenn O. Galloway, McLean, Va., assignor to Servei, Inc., New York, N. Y., a corporation of Delaware Application January 28, 1948, Serial No. 45,839 (C1. 126-39) 6 Claims.

This invention relates to gas ranges and particularly to means for distributing, ltering and preheating air that ilows into the combustion chamber in which the oven burner is located.

This application relates back for common subject matter to my earlier application Serial Number 602,063, filed June 28, 1945, now abandoned. This application is a continuation in part of the foregoing abandoned application.

In gas stoves generally and domestic gas ranges particularly, it is desirable that the intake air for the oven burner be adequate and that this air be uniformlyy distributed in the combustion chamber in which the oven burner and pilot are located. It is also desirable that the intake air be free of lint, dust and other foreign matter and that this air be supplied to the different burners in such manner as not to produce or set up drafts upon the burners. It is further desirable that the intake air be preheated, thus increasing the over-all eiiiciency of the oven. Furthermore, it i-s desirable and necessary with domestic gas ranges that the floor beneath the gas range be insulated from the relatively high temperature of the oven burner. Y

By this invention, I have accomplished the above and other objects and advantages in a simple, practical andvefcient manner, by providing a permeable pad of thermal insulating material below the combustion chamber in which the oven burner is located, and by providing a baiile plate above this insulating material. The insulating pad may be self supporting and form the `bottom of thecombustion chamber, or a bottom member, uniformly perforated throughout its entire area, may be provided as a support for the insulating pad.

The insulating pad is so arranged relative to the combustion chamber that substantially all intake air. primary, secondary and excess, that flows into the combustion chamber must first pass through this insulating pad. The baiile plate is arranged above and spaced from the insulating pad in such a manner as to prevent radiation or convection of heat from the flames of the gas burner directly to the insulating pad, while at the same time permitting substantially free flow of ambient air into and through all parts of the insulating pad. In this manner, the pad is uniformly cooled by the flow of ambient air therethrough, and the air is preheated in passing through the pad and beneath the baille plate. The pad is treated with a substance which renders the insulating material a filter whereby in passing through the pad. The'pad covers the entire bottom of the combustion chamber, nthereby insulating the floor beneath the range. A While I have shown but one pervi-ous wall, alloutside walls of the combustion chamber may be made pervious, whereby these Vwallsvwill lbe cooled by air flowing into the combustion chamber.

vReferring vnow to the accompanying drawing, wherein a preferred embodiment of this in vention is illustrated, and in which:

Y Fig. 1 is a broken perspective view, partlyin section, -of a gas range illustrating my invention; Fig. 2 is a transverse vertical sectional view taken substantially on line 2- 2 of Fig. l; and

Fig. 3 is an exploded perspective viewof a housing, van insulatingpadranda baille plate. A

The gas range II), illustrated in the drawings, includes an oven I I provided with a burner compartment or combustion chambeq` I2, a broiler or auxiliary oven I3, a utility drawer I4, top burners I5 and a supporting base I6. The oven II and combustion chamber I2 are each provided with doors, not shown. y y

In accordance with this invention, the combustion chamber I2 is provided with a perforated :box-like housing or bottom member I'I Vadapted to receive and hold a pad of insulating and filtering material I8. As shown in Fig. 3, member I1 is perforated to such an extent that air is free toiiovv through substantially the entire bottom area thereof. While I do not wish to be limited to particular materials, it has been found in practice that a pad of permeable material, such as glass wool or the like, coated With a suitable noniniiammable sticky substance such as, forexample, a heavy viscous oil, provides an excellent insulating and filtering pad. A baffle plate I9 is removably supported inspaced relation above the pad I8, as by four integral legs 2U which rest upon opposite top edges of member I'I. The .baffle plate is provided with perforations 2I along each of its transverse edges. As shown, baille plate I9 is smaller than the pad I8 so as to permit unobstructed ow of air from beneath the baffle plate into the combustion chamber. Furthermore, the baffle plate is so located and spaced relative to the insulating pad, that air owing into the combustion chamber, iiows upward through the interstices of the entire mass of the insulatingV pad', whereby 'the velocity of such air is materially reduced and the air enters the combustion chamber quietly without causing any draft on the burner. A gas burner 22 provided with a suitable pilot, not shown, is supported by entrained foreign matter is filtered out of the air the baie plate. The burner 22 1s provided with 3 a primary air mixing tube 22a located within the combustion chamber.

The oven II is formed with a bottom 23 provided with a slot 23a along each transverse edge and with perforations 24 along the front edge thereof. The top 25 of the oven lining is provided with a row of perforations 26 along each transverse, edge thereof, which perforations open into a horizontal flue 2'1. The horizontal flue'21 opens into a vertical flue 28 provided with louvers 29 on the top portion thereof. A dilution flue 30 leads from the lower rear portion of the range and opens into the Vertical flue. As shown in Fig. 2, base member I6 is provided with an elongate opening 3I which extends'alongthe rear of the range beneath the combustion chamber I2. The oven is provided withaa. drip;` pan, not shown, but which is spaced from and traverses substantially the entire bottom of the Voven so as to protect the pad I8. The oven is also provided with Vsuitable racks'. and. rack guides. not shown.

In operation, assuming that the ovenv burner is lighted, a chimney eiect .is produced in the vertical'ue 28 Which causes air to be.. drawn into the combustion chamber I2. All intake airpthat is primary,` secondary andy excess air, that enters the combustion chamber, passes through kthe elongate opening 3| at thek rear of thekbase'member I6 and into and across the space beneath the combustion chamber. As illustrated' by the arrows in Fig. 2. the -air then flows upwardly through the perforations in bottom member I'I, through the interstices in the insulating pad I8 into the space between the insulating pad and the baffle I9. The air then flows from' beneath the baffle member through the aperturesrZI and through the spaces provided between the peripheral edges of the bale and the side walls of the combustion chamber, into the combustion chamber proper. Air also flows directly Vupward through the margins of the insulating padVV and joins the air flowing from beneath the baiile into the combustion chamber. The blanket of ambient air iiowing into and across the space' beneath the bottom member I1 picks up heat and would otherwise be radiated to the floor beneath the range. In passing through the apertures Yof the bottom member andV through the insulating pad the` intakeair tends to uniformly cool the entire, bottom of the combustion chamber. Furthermore, the'air in passing from beneaththe baiilev IS' tends to pickupv additional `heat which would otherwise be radiatedk to the insulating pad. In passing through the insulating padl the air deposits entrained solid matter upon the sticky substance with which the pad is treated, thus protecting the oven burner and pilot; from theefects of lint, dust or other foreign particles. The spacing of the insulating pad I8V and the baiile plate I9` is such that suicient resistance is offered' to the flow of air passinginto the combustion chamber so that this air reachesthe burner without setting up any draft. The products of combustion ancl'heatedY air flow from the combustion chamber I2 through the slotslia and the perforations 24 into the oven II. From the oventhe products of combustion. and. heated air pass through the perforations 26, in theV top Apermeable external wall, a gas burner in said combustion chamber, so located as to heat said 1 permeable. .wall and means for permeating ambient -air into saidl combustion chamber through interstices of substantially the entire mass of said permeabley wall, whereby the air is heated in passing through the interstices of said wall andthe temperature of the external surface of said wall is maintained. at approximately room temperature during th-efoperationV ofsaidjgas burner, said; last. named means including 4a Aflue for conveying products of combustion from said' combustion ichamber.

2. In a` gas range as set forth4 in claim 1 where* in` said permeable wall includes a pad of porous` thermal insulating materialthrough the pores of `which the ambienti air permeates.

3. In a gas range asset forth in claim 2'. wherein the pad of insulating material is arrangedin a manner that'substantially all primary, secondary and excess air. that reaches thescombus.- tion chamber passes through the pores Yof said. insulating material..

4.' In -a gasrangeas set forth in claim 3 .wherein'a baiile plate is located in the combustion chamber between the .pad of insulating material and the gasV burner.

V5. Ina gas range as'setlforth in claim 4 wherein the baille plate is spaced from the pad of-.in sulating-material, whereby ambient air permeatesv through the pad of insulating materialv and across asurface of said baffle plate.

6. In a gas range as set forth in claim 5 wherein the pad of insulating material is treated with al substance which renders said padan air lter as well as a thermal-insulator, whereby all air that passes through the insulating materialis filtered beforereaching the combustion chamber.Y

GLENN O.'GALLOWAYL REFERENCESv CITED The `following references are. of record. in the le of this patent:

y GreatBritain Nov.s24,.1927

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