US1091649A - Gas-stove. - Google Patents

Description

G. F. & F. L. GRADY GAS STOVE.

APPLICATION FILED no. a, 1900.

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Patented Mar.

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c. F. M". L. "GRADY. GAS STOVE.

APPLICATION FILED D110. 8. 1909.

Patented Mar. 31, 1914,

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ms STOVE. APPLICATION FILED D30. 8, 1909.

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CHARLES F. GRADY AND FRANK L. GRADY. OF BUFFALO, NEW YORK, ASSIGNORS, BY MESNE ASSIGNMENTS, TO JEWETT & COMPANY, OF BUFFALO, NEW YORK, A (303-.

PORATION OF NEW YORK.

GAS-STOVE.

Specification of Letters Patent.

Patented Mar. 31, 1914.

To all 10710111 it may concern Be it. known that we, CHARLES F. GRADY and Fran; L. GRADY, citizens of the United States. residing at Buffalo, in the county of Erie and State of New York, have invented a new and useful Improvement in Gas- Stoves, of which the following is a specification.

The object of this invention is to produce a gas stove which has improved means for supplying the air to the burners. for concentrating, retaining and intensifying the heat and for ventilating the oven and in which the burners are capable of adjustment, so that the same may be readily converted for burning either natural or artificial gas to the best advantage.

In the accompanying drawings consisting of 3 sheets :Figure 1 is a horizontal section of a stove embodying our improvements the same being taken in line 1- -1, Fig. 2. Fig. 2 is a vertical transverse section in line 2-2, Fig. 1. Figs. 3 and 4 are vertical longitudinal sections in the correspondingly numbered lines in Fig. 1. Fig. 5 is a fragmentary vertical longitudinal section, similar to Fig. 3, showing the burner in a different position. Fig. 6 is a fragmentary vertical transverse section in line 66, Fig. r. Fig. 7 is a view similar to Fig. 6 but showing a modification in the manner of constructing the oven flue. Fig. 8 is a vertical longitudinal section, similar to Fig. 4, taken in line 8-8, Fig. 9, and showing a modified construction of the air supply flue and oven ventilating flue. Fig. 9 is a vertical transverse section in line 99, Fig. 8. Fig. 10 is a fragmentary vertical transverse section in line 10-10, Fig. 8. Fig. 11 is a fragmentary vertical longitudinal section, similar to Figs. 4 and S, and showing a modified construction of the manner of connecting the oven ventilating flue with the chimney pipe. Fig. 12 is a fragmentary sectional elevation showing a modification in the man ner of adjusting the burner in the shield. Fig. 13 is a top plan view of the burner shown in Fig. 12. Fig. 14 is a fragmentary horizontal section in line l t-4%, Fig. 4, on a reduced scale.

Similar letters of reference indicate corresponding parts throughout the several views.

Referring to Figs. 16, A indicates the bottom, B, B the side walls, B the rear wall, B the front wall, .and C the top of the hollow stove body or burner box which rests with its bottom on the oven D. At the rear end of the body the same has the usual rearwardly off-set conduit 6 and collar 6 for connection with the stove pipe leading to the chimney when natural gas is used. The top of the stove body is provided with the usual holes or openings f over which the cooking dishes are set, which openings may be closed by lids F if desired. The number of lid openings in the top may be varied but as shown in the drawings four are employed, two on each side and one behind the other.

G represents an upright partition arranged transversely in the rear part of the space within the body and engaging the bottom thereof but stopping at its upper end short of the top, forming a main transverse outlet passage or flue g in the body between the partition and the rear wall B of the body, and a narrow passageway between the upper end of the partition and the top of the body. Below each top opening 7 the bottom is provided with an air inlet open ing H.

I represents a plurality of circular bowls, guards or shields each of which is preferably dish-shaped and meets the bottom at its lower narrow end in line with one of the openings therein while its upper large end is in line with the companion opening in the top and communicates with the surrounding flue chamber or burner box within the body. Although the shields may be made in various ways, it is preferable to cast them integrally with the top and estab lish communication between the burner chambers in the shields and the surrounding flue chamber by means of annular rows of outlet openings 72- formed in the upper parts of the shields. as shown in Figs. 15.

TVithin each of the shields is arranged a burner I preferably of circular form, which is supplied with a mixture of air and gas by a tubular shank or branch pipe 2' arranged lengthwise in the body and connected at its rear end with the burner while its front end is provided externally of the body with a valve 2' and an air mixer 11 and connected with a transverse pipe section J. Air is supplied to the burners by means of two air. channels or conduits K, K which are arranged lengthwise side by side underneath the bottom of the body and each of which is constructed in the form of an upwardly opening trough and communicates with two burner openings in the bottom. These troughs are secured with their upper edges to the underside of the body bottom and have their front ends opening to the external atmosphere preferably through the front of the stove while their rear ends are closed, as shown in Fig. 3.

When burning natural gas it is necessary to .arrange the burner a comparatively greater distance below the top of the stove than when burning artificial gas on account of the greater pressure at which natural gas is supplied and also to insure mixture of the natural gas with the proper volume of air to produce complete combustion of the gaseous 'fuel and avoid the odors of unconsumed gas and also to burn the fuel more advantageously. When burning artificial gas, the burner is arranged higher or nearer the top of the stove, so as to compensatefor the reduced gas pressure and also bring the flame which burns more readily and with less air near the cooking dishes.

For the purpose of permitting the burner to be readily and quickly shifted either into an elevated or depressed position relatively to the top'for adapting the same to be used either with artificial or natural gas, the following means are provided z-L represents a rear supporting arm projecting from the rear side of each burner and adapted to be secured either to the underside of a downwardly facing shoulder or lug Z on the outer side of the respective shield or the upper side of an upwardly facing upper shoulder or lug Z on the inner side of the shield, the preferred fastening for this purpose consisting of a bolt m passing vertically .through said arm and an opening m formed in said lugs Z, Z Adjacent to the front of the burner its branch gas supply pipe 2' is provided on opposite sides with laterally projecting arms 0, 0 which are adapted to engage either with the underside of the lower shoulders or lugs .79, p on the exterior of the respective shield on opposite sides of the branch pipe, or with the upper sides of upper lugs g, g arranged on the inner side of the shield in line with the lower lugs 2, p Une of the laterally projecting arms is secured in either of the above men tioned positions preferably by a bolt Q passing vertically through said arm and an opening formed in the respective pair of upper and lower lugs but the other laterally projecting arm merely engages one-or the other of its companion shield lugs and operates to steady ,the branch pipe and burner and hold the same against displacement.

hen burning natural gas, the burner an its tubular shank or branch pipe are lowered and held in this position byengaging the arms L, 0, 0 with the undersides of the lugs Z, 3), p and securing the same by the bolts m, Q, as shown in Figs 2, 3 and 4. When burning artificial gas the burner and its branch pipe are raised and the arms L, 0, 0 are engaged with the upper sides of the lugs Z 9, 9 as shown. in Fig. 5, and held in place by the same bolts m, Q. In either its raised or lowered position the burner is separated by an annular space of substantially the same width from the lower edge of the shield, so that the amount of air supplied to the burner is practically the same either in its raised or lowered position.

To permit of thus raising and lowering the burner and its gas supply pipe, the adj acent part of the shield is provided with a vertical slot R which receives the branch pipe '5. In the lowered position of the burner and branch pipe this slot is practically closed, so as to prevent undue entrance of air to the shield by a cover 9" fitting in said slot and resting on top of the branch pipe and held against displacement by a lug r arranged at its upper end and engaging with this inner side of the shield and a plurality of laterally projecting lugs r arranged on the outer side of said cover and engaging with the outer side of the shield, as shown in Figs. 2 and 3. In the raised position of the burner and supply pipe the cover 1" is removed and the slot R is practically closed I by the branch pipe of the burnefwhich occupies this slot in the raised position of the burner. This provision for rendering the stove capable of use either with natural or artificial gas renders it unnecessary for the dealer to keep two kinds of stoves in stock, inasmuch as he can readily adapt the stove so that it can be used with either kind of gas. To permit of thus changing the burner for use with either artificial or natural gas at any time, the transverse pipe J is connected by a rearwardly extending vertically swinging pipe section y with a main supply pipe J as shown in Figs. 1 and 2, one of said pipe sections being provided .with a hand valve j for turning ofi the gas, from all the burners when desired.

For the purpose of ventilating the bake oven, a due S is provided which connects the top of the oven with the chimney flue or stove pipe. ltn its preferred form this oven ventilating flue is constructed by means of a horizontal plate 8 which extends lengthwise from the front wall to the rear wall of the oven,as shown in Fig. l, and bridges the space between the two air conduits for the burners, as shown in Fig. 2, and side walls 8 s as shown in Fig. 6. The side walls 8 s are arranged between the rear ends of the air conduits and the rear wall of the oven, as shown in Fig. 14 and form a continuation of the oven flue in rear of the burner air channels or fines. The plate may be held in place by vertical bolts 6 connecting the same with the bottom of the stove body, as shown in Figs. 1, 2, at and 6.

Instead of forming the side walls of the rear part of the oven flue on the bottom of the stove body these walls, as shown at 8 Fig. 7 may be formed on the bottom plate .9 of the oven flue.

The vapors and spent gases pass from the bake oven upwardly through openings 2 in the bottom plate 8 of the oven flue, thence rearwardly through the latter and thence upwardly through an opening i in the bottom plate A in rear of the partition G and into the main flue 9 leading to the stove or chimney pipe.

Instead of making the air supply conduit or channel for the burners in two sections, as shown in Fig. 2, a single conduit or channel K may be employed to supply air to all of the burners, as shown in Fig. 9. In this construction the oven flue S is constructed in the form of a trough which engages at its upper edges with the underside of the one piece air conduit and is turned upwardly in rear of this conduit, as shown in Fig. 8, so as to conduct the oven vapors entering the inlet openings 16 to the outlet opening 2 in the stove body bottom leading to the stove or chimney pipe or fine.

If desired, the vapors from the oven may be carried from the rear end' of the oven flue S through an opening a in the rear wall of the oven and thence upwardly, a flue extenslon a being formed on the rear wall of the oven and leading to the stove pipe, as shown in Fig. 11.

Instead of effecting the vertical adjustment of the burners by the means shown in Figs. 15, 8 and 9, this may be effected by the means shown in Figs. 12 and 13 and which consist of a pair of upper lugs w, l)

and a pair of lower lugs 20, w arranged on' the upper and lower part of the burner I either one or the other pair of said lugs being adapted to engage with the edge of the bottom A of the hollow stove body or burner box. Upon engaging the upper lugs 0, Q) with the bottom A, as shown by full lines in Fig. 12 the burner will set low in the shield, whereas if the lower lugs to, w are engaged with the bottom, the burner will set high in the shield, thereby permitting of adapting the burner for use both with natural or artificial gas.

lVe claim as our invention:

1. A stove comprising a body having a top provided with a cooking opening and a bottom provided with an air inlet opening, a shield arranged between the top and bottom in line with the openings thereof. and a burner arranged in the shield, said shield and burner having means for adjusting the burner vertically in the shield comprising an arm moving with the burner and adapted to be secured either to the exterior or the interior of said shield.

2. A stove comprising a body having a top provided with a cooking opening and a bottom provided with an air inlet opening. a shield arranged between the top and bottom in line with the openings thereof, and a burner arranged in the shield, said shield and burner having means for adjusting the burner vertically in the shield comprising lugs arranged on the exterior and interior of the shield and an arm moving with the burner and adapted to be secured either to the underside of the lug on the exterior of the shield or to the upper side of the lug on the interior of the shield.

3. A stove comprising a body having a top provided with a cooking opening and a bottom provided with an air inlet opening, a shield arranged between the top and bottom in line with the openings thereof, a burner arranged in the shield and a fuel tube connected with the burner, said shield and burner having means for adjusting the burner vertically in the shield comprising two pairs of lugs the members of each pair being arranged on the exterior and interior of the shield, an arm arranged on the burner and adapted to be secured to the external or internal member of one of said pairs of lugs, and an arm arranged on the fuel tube and adapted to be secured to the internal or external member of the other pair of said lugs.

4. A stove comprising a body having a top provided with a cooking opening and a bottom provided with an air inlet opening, a shield arranged between the top and bottom in line with the openings thereof and having a vertical slot, a burner arranged in said shield and having a fuel supply tube arranged in the slot, said burner and shield having means for adjusting the said burner and its pipe vertically, and a cover for closing said slot in the lowered position of the burner and pipe.

5. A stove comprising a hollow body having a top and bottom provided with coinciding burner openings, and also having a stoye pipe collar, and a partition between sa d burner openings and said collar, and said bottom being provided between the partition and collar with a ventilating opening which communicates with said collar, burners arranged in line with said burner openings, two air flues or supply channels arranged side by side under said bottom and leading to the burner openings therein, an

oven arranged below said body, and an oven flues to the rear Wall of the oven and ar- 10 ventilating flue leading from the top of the ranged on opposite sides of said plate.

oven to the ventilating opening in said bot- Witness our hands this 6th day of Decemtom and having an opening whereby the ber, 1909.

5 ventilating flue communicates with the oven CHARLES F. GRADY.

and consisting of a plate extending from the V FRANK L. GRADY. front to the rear Wall of the oven and bridg- Witnesses: ing the space between said air fines, and side EUGENE P. OUoHIE,

walls extending from the rear of said air TZEEO. L. PoPP.

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