US622540A - egberts - Google Patents

Description

No. 622,540. Patented Apr. 4, I899. B. V. ROBERTS.

GAS ATTACHMENT FOB STOVES 0R RANGES.

(Application filed Apr. 12, 1898.) (No Model.) 2 Sheets-Sheei i.

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No. 622,540. v

Patented Apr. 4, I899.

. ROBERTS.

GAS ATTACHMENT FOR STUVES 0B RANGES (Application filed Api'. 12, 1895,

2 Sheets-Sheet 2 (No Model.)

1-H: uonms PETER S co PHOTO-LITHOT, wnsumurou. a c

.rvrrn STATES PATET rrrcn.

CLARENCE V. ROBERTS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE THOMAS, ROBERTS, STEVENSON COMPANY, OF SAME PLACE.

GAS ATTACHMENT FOR STOVES OR RANGES.

srnoirroArrolv forming part of Letters Patent No. 622,540, dated April 4, 1899.

Application filed April 12, 1898, Serial No. 677,331. (No model.) A

To rtZZ witont it may concern:

Be it known that I, CLARENCE V. ROBERTS, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Gas Attachments for Stoves or Ranges, of which the following is a specification.

My invention relates to that class of coal stoves or ranges which are provided with to burners whereby gas may be used as fuel when the use of coal is not convenient or desirable, the gas used being either the ordinary illuminating-gas or a gas derived from the vaporization of gasolene or other hydrocarbon.

One object of my invention is to so construct the devices employed for heating the oven with gas that they will not interfere with the proper operation of the stove when coal is being burned, a further object being to insure the eflective heating of the water in the elevated boiler of the range when gas is used as fuel, and a still further object being to provide a convenient broiling device for use when 2 5 gas is employed.

In the accompanying drawings, Figure 1 is a perspective view of a stove or range constructed in accordance with my invention. Fig. 2 is a longitudinal section of the oven 0 portion of the stove, showing the parts as they appear when gas is being used as fuel. Fig. 3 is a view of part of the lower portion of the oven structure, showing the same as it appears when coal is being used as fuel. Fig.

5 4. is atransverse section, on an enlarged scale,

on the line at er, Fig. 2. Fig. 5 is a longitudinal section of part of the elevated boiler structure of the stove or range. Fig. 6 is a transverse section through said boiler structureand throughthebroilerattachment. Fig. 7 is a sectional view on the line to w, Fig. 2; and Fig. 8 is a transverse section of part of the lower-flue structure, illustrating a modification.

5 1 represents the oven of the stove; 2, part of the flre-pot5 3, the top fine, with gasburners 41 1 underneath the pot-holes in the top plate; 5, the descending flue at the side of the oven; 6, the bottom flue, and 7 the flue-strip,

usually located in said bottom flue for caus- 5o ing the products of combustion to circulate through the latter in their passage from the side flue 5'to the ascending flue 53, Fig. 7, which communicates with the chamber at the rear of the top flue back of the flue-strip 3 and leading to the smoke-pipe 9. This top flue strip 3 is in line with the vertical strip 5 which separates the fines 5 and 53, so that the products of combustion ascending the said flue 53 cannot gain access to that portion of the top flue containing the burners at. All of these parts are constructed as usual, with the exception of the flue-strip 7, which instead of being a single flat strip, as usual, has a curved portion 10 flanked by a curved cap-plate 10, the two forming a tubular chamher, through which passes the pipe 11, whereby the oven-burner 12 is supplied with a mixture of gas and air from a mixer 13 at the outer end of said pipe 11, said mixer being supplied with gas from the supply-pipe 14 at the side of the range.

The diameter of the tubular chamber within the flue-strip is somewhat greater than the external diameter of the pipe 11, so as to pro- Vide an air-chamber surrounding the latter, and thus protect it in large measure from the heat radiated from the burner 12 or from the hot oven. By this means I prevent that tendency to backflow of air and gas through the The bottom plate 15 of the oven has in it 0 A an opening, to which when the burner 12 is in use is applied an open frame 16, with detachable conical plate or deflector 17 for throwing outward the products of combustion arising from the burner 12, said frame also having a depending flange 17 which crosses the bottom flue 6 and incloses the burner 12 except where the supply-pipe enters the same.

By reason of this inclosing flange the products of combustion from the burner 12 are prevented from escaping into the flue 6; but in order to supply to said burner air sufficient to support combustion I form in the bottom plate of the range, below the opening in the plate 15, an opening surrounded by a short 11 pwardl y-proj ectin g flange 19, through which opening external air can flow to supply the burner, the flange directing the air up through the central opening of said burner. Instead of forming an opening in the bottom of the stove, however, for this purpose there may be a front, back, or side opening supplying an air-chamber, with flanged outlet 19 at the inner end, as shown, for instance, in Fig. 8.

Proper draft through the oven when the burner 12 is in use is effected by an opening or openings 20, located at the rear portion of the side plate 21 of the oven and contained in a chamber 50, formed at the top of the oven by a plate 51, with openings 52 in the bottom, as shown in Figs. 2 and 7, the openings 20 being controlled by a suitable sliding damper 22, so that their area may be regulated as desired or they may be completely closed when the gas-burner 12 is not in use for the purpose of heating the oven. By this means the products of combustion from the burner 12 are drawn toward the central portion of the top of the oven, and thence directed to the ascending side flue 53, which flanks the descending flue 5, as shown in Fig. 7, and from said flue 53 the products of combustion find their way through the chamber at the rear of the top flue 3 into the smokepipe of the range, the draft being regulated by the adjustment of the damper 22.

Openings leading from the oven into the room or apartment in which the stove is situated may be used, if desired; but it is preferable to provide communication between the oven and flue in order to insure a draft through the oven.

When coal is being used as fuel. in the range, the frame 16 is removed and the opening in the bottom plate 15 of the oven is closed by a plate 23, as shown in Fig. 3, this plate having a depending plug 24, which rests upon the top of the flange 19, surrounding the opening in the bottom plate of the stove, thereby closing said opening and preventing the access of air to the bottom flue 6, as is necessary under the conditions of Working when coal is employed as fuel. The plug 24 is mounted upon a bolt 25, depending from the plate 23, so that said plug can have a limited amount of vertical and lateral play independent of said plate, in order that it may seat itself properly upon the top of the flange 19 irrespective of slight variations in the distance apart of the plates of the stove, such as might exist in original structures or might be caused by'warping of the parts. The plate 23 also has on the under side an enlargement or flange 28, which fits snugly to the top of the burner 12 and closes the same so tightly that no air can gain access to the flue 6 through said burner when the plate 23 is in place.

When the gas-burners 4 are employed in connection with the pot-holes on the top of the range, said pot-holes are provided with gratings 26, such as are usually employed in connection with gas-stove burners; but when coal is being used as fuel these gratings may be replaced by the usual plates 27. (Shown detached in Fig. 1.)

The gas-pipe 14 has a valve 29, whereby the flow through the pipe 11 is regulated, and also has valved branches 30 and 31, which govern the flow of gas to the burners 4, and the pipe 14 is carried along the front of the stove and rearwardly along one side of the same and then upwardly and is provided at and near said upper end with three valved branches for supplying the mixers 32, 33, and 34, these mixers being used, respectively, in connection with the broiler 35, the pipe 36 for heating the elevated boiler 37, and the pilot-light 39, whereby the ignition of the jets on said pipe v 36 is effected in the ordinary manner.

A segmental shield or casing 40 extends from the rear side of the boiler down behind the pipe 36 and then forwardly under said pipe and under the boiler until it meets the front casing 41, so that the products of combustion escaping from the pipe 36 are com.- pelled to pass forwardly under the boiler 37, thence up in front of the same, and thence backwardly over the top of the boiler to the smoke-pipe 9, Which they enter through suitable openings in the front of the same, these openings being controlled by a damper 42, which is operated by a rod extending to the front of the casing 41 and provided with a suitable handle, whereby it may be readily manipulated. By this means the products of combustion from the burner 36 are compelled to pass around the greater portion of the circumference of the boiler 37, so as to exercise their maximum effectiveness in heating the boiler.

Openings,such as 43,are formed in the shield 40 to supply air to the burner 36, and the joint between the rear portionof said shield and the shell of the boiler is preferably closed by asbestos or other suitable packing, so as to prevent any flow of the products of combustion upwardly through said joint.

In order to prevent either the escape of the products of combustion or the inflow of air at either end of the boiler, I provide each of the recessed end plates 44 of the boiler-supporting structure with a ring 45, which closes the mouth of said recess, and I fill the recess with asbestos or other suitable packing 46, so as to form a tight joint between the boilershell and the end frame.

The broiler 35 occupies onehalf of the usual warming-closet, which is located below the elevated boiler, as usual in ranges of the class to which my invention relates, and the IIO smoke and gases arising from the'operation of the broiler ascend'in the rear of the boiler and escape through the dampered opening in the upper portion of the smoke-pipe.

opening in the oven-bottom, a gas-burner below said opening, a mixer and a supply-pipe for the burner leading from said mixer, and a bottom-flue strip having a chamber through which said burner supply-pipe passes, and which forms an air-space surrounding said pipe, substantially as specified.

2. The combination of a stove adapted to burn either solid or gaseous fuel having an opening in the bottom plate of the oven, an annular gas-burner below said opening, a lower flue for products of combustion from the solid-fuel burner, and an opening in the lower flue for supplying air to said burner, said opening being surrounded by a flange projecting upwardly within the annular burner so as to direct the air to the burner, substantially as specified.

3. The combination in a stove adapted for burning either solid or gaseous fuel, of the bottom plate of the oven having an opening therein, a lower flue for products of combustion from the solid-fuel burner and also having a bottom opening in the same, a gas burner in said fine and a plate closing said opening in the bottom plate of the oven when the gas-burner is not in use, said plate having a depending plug for closing the opening into the lower flue, substantially as specified.

4. The combination in a stove adapted for burning either solid or gaseous fuel, of the bottom plate of the oven having an opening therein, a bottom flue for products of combustion from the solid-fuel burner and also having an opening in the same, the latter opening being surrounded by an upwardlyprojecting flange, a gas-burner in said lower flue, and a plate adapted to close the opening in the bottom plate of the oven when the burner is not in use, said plate having a dependingplug for resting upon the top of said flange and thereby closing the opening into the lower flue, substantially as specified.

5. The combination in a'stove adapted for burning either solid or gaseous fuel,'of the bottom plate of the oven having an opening therein, a bottom flue for products of combustion from the solid-fuel burner and also having an opening in the same, a gas-burner in said lower flue, and a plate adapted to close said opening in the bottom plate of the oven when the gas-burner is not in use, said plate having a depending plug for closing the opening into the lower flue, and said plug being so mounted as to have a limited amount of play, substantially as specified.

6. In a stove, the combination of the bottom plate of the oven having an opening therein, an annular gas-burner below said opening, a frame adapted to the opening and having a depending annular flange for inclosing the burner, the bottom of the stove having an opening therein with an annular flange surrounding the said opening and projecting upwardly from the bottom within the annular burner, substantially as described.

7. A stove or range having an elevated boiler, a front casing for the boiler, a shield extending from the rear and below the boiler -to said casing, a gas-burner between said shield and easing, a smoke-pipe passing upwardly in the rear of the boiler and having a damper-controlled opening at the rear of and in proximity to the upper portion of the boiler, and a broiler below said boiler and shield, whereby the products of combustion from the gas-burner pass up and around the front of the boiler, while the products of combustion from thebroiler pass up and around the rear of the boiler to the damper-controlled opening in the smoke-pipe, substantially as described] 8. A stove having a gas-burner for heating the oven, and a chamber with central inletopenings at the top of the oven, said top Ghttll1=- ber discharging into one of the flues of the stove, substantially as specified.

9. A stove having a gas-burner for heating the oven, a top oven-chamber having openings communicating with the oven and other openings communicating with one of the flues of the stove, and a damper whereby the draft through said top chamber is controlled, substantially as specified.

10. The combination in a stove adapted for burning either solid or gaseous fuel and having a bottom flue for the products of com bustion from the solid-fuel burner, of the bottom plate of the oven having an opening in the same, and a gas-burner located in the said flue and beneath said opening, with a cover-plate for closing the opening when the burner is not in use, said plate having a portion for resting upon the top of the burner and closing the same, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CLARENCE V. ROBERTS.

Vitnesses:

CI-IAs. H. BANNARD, FRANK E. BECHTOLD.

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