US1136338A - Self-heating sad-iron. - Google Patents

Description

G. B. HUDSON & W. P. BOPE.

. SELF HEATI NG SAD IRON.

APPLICATiON FILED DEC. 29, 1913. RENEWED MAR. 15, 1915.

1 3]. 3@,3$& Patented Apr. 20, 1915.

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15 1 I l (56/3ylli a ils W a 3 9 aw'uewto'as lm mm I M THE NORRIS PETERS c0.. FHOTC-LITHO.. WASHINGTON. D. C.

G. B. HUDSON & W. P. BOPE.

SELF HEATING SAD IRON.

APPLICATION man 05c. 29, 1913. RENEWED MAR. :5. 1915.

Patented Apr. 20, 1915.

2 SHEETS-SHEET 2.

THE NORRIS PETERS 60., PHOTO-LITHQ. WASHINGTON. D. c.

GEORGE B. HUDSON AND WILLIAM P. BOPE, 0F DECATUR, MICHIGAN.

sELnHEA'rING SAD-IRON.

Specification of Letters Patent.

Patented Apr. 20, 1915.-

Gontinuation in part of application Serial No. 697,116, filed. May 14, 1912. This application filed December 29, 1913, Serial No. 809,159. Renewed March 15, 1915. Serial No. 14,505.

To all whom it may concern.

Be it known that we, GEORGE B. HUDSON and WILLIAM P. Born, citizens of the United States, residing at Decatur, Michigan, have invented certain new and useful Improvements in Self-Heating Sad-Irons, of which the following is a specification.

This invention relates to improvements 1n self heating sad-irons in which gasolene or similar hydrocarbon fuel is used.

The objects of this invention are: F irst, to provide an improved burner structure for use in such a sad-iron, having an lmproved valve and valve head structure. Second, to provide in such a self heating sad-1ron an improved cover construction. Thlrd, to provide in such a structure, easily removable means for deflecting the heat downwardly.

Further objects and objects relating to details and economies of construction will definitely appear from the detailed descriptlon to follow.

We accomplish the objects of 011I1IlV611- tion by the devices and means descrlbed 1n the following specification.

The invention is clearly defined and pointed out in the claims.

A. structure which is a preferred embod1- ment of our invention is clearly illustrated in the accompanying drawing forming a part of this specification, in w h1ch:

Figure I is a side perspectlve view of a sad-iron embodying the features of our 1nvention. Fig. II is an enlarged detail longitudinal sectional view thereof, taken on a line corresponding to line 22 of F gs. III and IV. Fig. III is a sectional view taken on a line corresponding to line 33 of Fig. II, a portion of the handle being broken away. Fig. IV is a detall sectional view taken on line 44 of Figs. II and III, with the burner and generator tube removed. Fig. V is a detail plan view of the inner top plate 7. Fig. VI is a detail plan view of the inner end of the tubular burner, the extreme inner end thereof being shown in section. Fig. VII is a perspective view of one of the heat deflecting members removed from the sad-iron. Fig. VIII is an enlarged detail sectional View on the line 88 of Fig. II, showing the burner valve. Fig. IX is a detail elevational view showing the top plate engaging one of the notched lugs on the sad-iron.- Fig. X is a detail sectional view on the line 1010 of Fig. III, showing details of the lug and set screw for securing the cover in place. Fig. XI is a detail sectional view showing amodified form of handle and the means for securing the same to the top plate.

In the drawing the sectional views are taken looking in the direction of the little arrows at the ends of the section lines and similar numerals of reference refer to similar parts throughout the several views.

Considering the numbered parts of the drawing, the main body of the sad-iron 1 is hollow and of the usual external form, being pointed at both ends, the forward end being centrally notched for the support of the generator tube. The cover comprises an outer top plate 2 and an inner top plate 7 The outer top plate 2 carries the handle 3, which is preferably made of wood or similar material, and secured by means of the screws 5 to the members 4 projecting upwardly from and integral with the top plate 2. From the bottom side of the top plate 2 project the lugs 6 which are received in suitable openings 8 in the top plate 7. The lower side of the top plate 2 is provided with a boss 10. The stove-bolt 12 passes through said boss and through an alined opening 11 in the top plate 7, and secures the two top plates together. Boss 10 serves to space the two top plates from each other so as to permit the circulation of air between them, thus serving to keep the top plate as cool as possible. The top plate 7 is also provided with apertures 9, 9, to aid in the circulation of the air for cooling the cover.

Upwardly projecting lugs 13 on the side walls of the sad-iron are provided with notches 14: on the rear sides thereof. These lugs are disposed in notches 15 in the inner plate 7 so that the notches 14 engage the edges of said inner top plate. Upwardly projecting spacing lugs 16 are provided at the opposite sides of the plate 7 Supporting and spacing lugs 16 are also provided on said plate. The plate 7 is notched toward its rear end at 15 and receives in said notches the upwardly projecting lugs 17 which extend to a proper height to contact with the outer cover plate 2 so that when the cover is removed they serve as supports for a frying pan or kettle so that the burner may be used as a stove. Lug 18 depends from the under side of the top plate 7 and a set screw 19, disposed through one of the transverse walls 20 of the sad-iron, engages said lug to prevent rearward movement of the plate 7 and hence secure the cover in place. Apertures are formed by the notches 21 in the side walls of the sad-iron to permit the circulation of air and the escape of the heated gases, to aid in cooling the top. The air for combustion is admitted through the burner tube.

Between the transverse walls 20 of the sad-iron is disposed the burner support 22 which is suitably grooved and tapered so as to fit substantially gas tight at this joint. The generator tube 24 is screw threaded into this burner support 22 and bottoms against a suitable seat to make a gas tight joint. This tube is disposed in notch 26 at the front end of the sad-iron, and a gasolene or fuel reservoir 25 is carried on the outer end thereof. The burner support 22 is integral with a suitable valve casing and chamber 27 into which the generator tube opens, is connected by the oblique passage 28 with the valve chamber 29. The needle valve 30 is provided in the said chamber and said Valve is somewhat less in diameter than the chamher, so that a space is provided around the valve which is filled with the generated gas. Said needle valve terminates in the needle point 31 which fits into a suitably tapered seat 32 in the Valve casing. The needle valve is provided with a square shoulder 34 which fits against a corresponding square shoulder 35 in the valve casing at the end of the chamber 29. The needle point is fiattened at 33 on each side to afford a very free passage when the valve is open and to accommodate any accumulation of grit or the like, and said point normally projects beyond the face of the valve casing to keep the opening free from dirt. The square shoulders insure a perfect seating of the valve and a perfect closing of the same. The valve is screw threaded and provided with a suitable stuifing box and is squared at its outer end for the use of a wrench or key. These features clearly appear'in Figs. II and VIII. This structure insures, as indicated, the free passage of the gas and the certain feeding of the gas at the restricted jet orifice and insures the ready delivery of the gas without any likelihood of the bore of the jet aperture being injured.

A tubular burner 36 is inserted into a suitable opening in the burner support 22 and is adjustably secured in position by means of the set screw 39. The inner end of the burner is provided with a plug 38 and the burner is suitably perforated as at 37 toward the under side so as to direct the jets of flame downwardly. However, this burner is reversible and the jets of flame may be directed either up or down as desired. The sad-iron with this single burner is very effective for all uses and effectively heats the generator in any position to which it may be adjusted.

It is of the highest importance to secure jet action from the valve to force the gas into the tubular burner at a strong pressure so that air will be entrained and carried in in sufficient amount to complete combustion when the mixture passes beyond the burner in the hollow sad-iron.

To aid in heating the bottom of the sadiron, I have provided the members 40 which serve to keep the heat from the burner 36 in the bottom of the sad-iron, and to deflect a portion of it so that it will strike the generator tube and heat the same perfectly. These members 40 are suitably curved to conform to the curvature of the sad-iron and their central portions are T-shaped in cross section, being provided on their upper edge with the deflecting flanges 41. The ends of said members are directed inwardly and they are of such length that when a pair of these members are disposed in the bottom of the sad-iron, with the central portions 011- gaging the sides thereof, the ends will fit normally in engagement with each other. WVhen the burner is started the heat therefrom will cause these members to expand so that they will be held tightly in the bottom of the sadiron. They can be removed as desired when the sad-iron is cool and they have contracted to their normal size.

In Fig. XI we have shown a modification in which is provided a curved handle 4-2 of wood or similar material having at its ends protecting washers 43. This handle is secured to the cover by means of the screw ell passing through the cover and into the handle 42. The top plates 2 and 7 are provided with upstanding lugs 45 and l6 respectively for spacing the handle relative to the plate 2 and the plate 2 relative to the plate 7. This insures the complete circulation of the air between the parts and aids in keeping the same cool.

When it is desired to use the sad-iron as a heater the tubular burner can be turned so that the jets will be directed upwardly, delivering the heat where it is desired to use it. Owing tothe strong jet action which we secure by our improved valve structure we are able to entrain and deliver enough air in the tubular burner along with the gas and under such pressure that it passes out of the tubular burner through the perforations into the hollow sad-iron and burns very effectively without any other air inlet to deliver air to support combustion. The apertures in the upper part of the sad-iron are merely for the escape of the heated gases. The effect of the apertures 9 through the inner plate 7 is to secure circulation and to distribute the heated air quickly and also to permit the ingress of cold air to keep the top plate cool.

The burner support is held in place by means of the top plate 7 and the latter is held in position by the set screw 19 engaging against the depending lug 18. It will thus be seen that the single set screw 19 retains all the parts in place. By making the heat deflecting members 40 so that they can be removed when the sad-iron is cold it is very easy to turn the sad-iron into a stove. The ends of the deflecting members 40 which are disposed nearest the valve casing are beveled so as to form a V-shaped notch 40. The base of the sad-iron at the rear end is provided with a flange 48 which forms a reservoir 47. To start the burner the cover is removed and the burner support 22 is lifted a slight distance. Alcohol is then poured into the base of the sad-iron and into the reservoir 17 It is then ignited and the flame heats the burner and generator tube to start the same. The reservoir 47 insures the thorough preheating of the valve casing.

We are aware that the particular embodiment which we have here shown is susceptible of considerable variation with departing from the spirit of our invention, and, therefore we do not wish to be restricted to the same. However, we have found that this particular embodiment of our invention is to be preferred, and we desire to claim the same specifically as well as broadly as in dicated by the appended claims.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent, is:

1. In a self heating sad-iron and heater, the combination with a tubular burner, of a needle valve casing for said burner, with a reduced tapered nozzle aperture and a shouldered valve seat; and a needle valve with a needle point conformed to said nozzle aperture and flattened at its sides, and shouldered to fit said shouldered valve seat, the said nozzle disposed to deliver to said tubular burner, all coacting as specified.

2. In a self heating sad-iron and heater, the combination with a tubular burner, of a needle valve casing for said burner, with a reduced tapered nozzle aperture and a shouldered valve seat; and a needle valve with a needle point conformed to said nozzle aperture, flattened at its sides, and shouldered to fit said shouldered valve seat, said needle point normally projecting beyond the face of said casing, the said nozzle disposed to deliver to said tubular burner, said valve casing being provided with a chamber surrounding said needle valve, all coacting as specified.

3. In a self heating sad-iron and heater, the combination with said sad-iron, of a cover therefor comprising inner and outer top plates, a handle supported on said outer top plate, upwardly extending lugs on the side walls of said sad-iron, rearwardly directed notches in said lugs, notches in the inner top plate adapted to receive said lugs with the edges of said top plate engaging in said lug notches, upwardly extending lugs on said inner top plate, said lugs being adapted to support the upper top plate in spaced relation to the inner top plate, a lug depending from the inner top plate, and a set screw carried by the rear wall of said sad-iron and engaging said depending lug to prevent rearward movement of the inner top plate, all coacting as specified.

4. In a self-heating sad-iron, a pair of removable heat defiecting members curved in conformity with the curvature of the sadiron and adapted to be disposed in the base thereof, said members carrying deflecting flanges on the upper edge thereof, the ends of said members being adapted to engage each other, all coacting substantially as described for the purpose specified.

5. In a self heating sad-iron, a burner support slidably mounted in the rear wall of said sad-iron, a burner and valve casing carried by said support, a starting reservoir in the base of said sad-iron beneath saidburner head, and a pair of heat deflecting members disposed in the base of said sadiron and having their ends nearest the valve casing, notched, all coacting as specified.

In witness whereof, We have hereunto set our hands and seals in the presence of two witnesses.

GEORGE B. HUDSON. WILLIAM P. BOPE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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