US1726027A - Combined burner and scraper - Google Patents

Description

Aug. 27, 1929. R, H, JQHNSON 1,726,027

COMBINED `BURNER AND SGRAiPER Filed July 5, 1928 ff. JO-7016021@A amy F ting snugly about the nozzle.

Patented Aug. '27, 1929.

UNITED STATES PATENT OFFICE.

ROBERT H. JOHNSON, OF WASHINGTON, DISTRICT OF COLUMBIA.

COMBINED BURNER AND SCRAPER.

Application led July 5, 1928.

- from painted surfaces and following the burning in one operation with the removal of the burned paint by scraping.

Another object of the invention is to provide an attachment for a blow torch which will acomplish the two-fold purpose above described and be simple and compact in construction and capable of an inexpensive manufacture.

The device is so constructed and arranged as to remove the paint without injuring the surface from which the paint was removed.

llVith the foregoing and other objects in view, the invention will be more fully described hereinafter, and will be more particularly pointed out in the claims appended hereto.

In the drawings, wherein like symbols refer to like or corresponding parts throughout the several views,

Figure 1 is a side View of a blow torch showing the improved burner and scraper applied thereto.

Figure 2 is a longitudinal sectional view taken through the improved device and showing the blow torch nozzle in elevation.

Figure 3 is a cross sectional view taken on the line 3-3 in Figure 2.

Figure 4 is a similar view taken on the line 4-4 also in Figure 2, and

Figure 5 is a 'section taken on the line 5*5 in Figure 4.

Referring more particularly to the drawings 6 designates generally a blow torch of conventional type having the pump 7 for compressing air therein, the perforated nozzle 8 and the needle valve 9.

In accordance with the invention a tube 10 is fitted over the end of the nozzle 8, such tube having a flange 11 at one end for fit- The other end of the tube is externally threaded, as indicated at 12, to receive the internal threads upon the sleeve 13. This latter sleeve carries at its outer end a plate having numerous perforations 14 therein. The diameter of the plate is preferably larger than that of the sleeve 13 and a flaring portion 16 connects the outer edge of the plate 14 with the adjacent end of the sleeve 13. lVithin this flaring portion 16 is a Serial No. 290,628.

chamber disposed between the end of the sleeve and the plate 15 which are spaced apa-rt as shown in Figure 2. The sleeve 13 is traversed by an annular series of air inlet ports 17. The port area is controlled by a ring 18 having corresponding ports 19 therein. The ring is preferably formed with a flange 20, which rotatably fits about the tube 10 F orwardly of the an ironing plate 21. This ironing plate is imperforate and spaced from the plate 14. The ironing plate 21 is provided with a flange 22, which envelops the flaring end portion of the sleeve 16. Screws 23 are threaded through the flange 22 and have their inner ends disposed in sockets 24 in the part 16 whereby to hold the flange 22 spaced from the member 16 and from the peripheral edge of the perforated plate 15.

A pocket 25 is formed in the lower portion of the ironing plate 21 and flange 22 and in this pocket is disposed a scraping blade 25 adapted to project beyond the outer edge of the ironing plate 21. The degree of the projection of this scraper blade 25 is determined by a cam 26 mounted in the pocket 25 and operable through a stem 27 and hand wheel 28 which is accessible from the exterior.

In the use of the device, the attachment is applied to the usual form of hand torch by simply slipping the tube 10 over the nozzle 8; whereupon the device is in condition for use. The flame from the blow torch will enter the tube 10 and be directed toward the chamber 29 in back of the perforated plate 15. In this chamber the flame and other products of combustion will receive quantities of air through the ports 17 and 19. By rotating the cut-off ring 18, as indicated in Figure 3, the ports 17 and 19 may be moved into and out of registry or into partial registry so that the amount of air entering the chamber 29 can be nicely controlled.

The air entering the chamber 29 will serve to support the combustion which might otherwise tend to lag owing to the confined space into which the flame is directed. The commingled flame and air passes through the numerous perforations in the plate 15 and is directed through these perforations against the ironing plate 21. As a consequence this ironing plate acquires a high degree of heat.

perforated plate 15 is The ironing plate is moved over the painted surface and burns the paint off such surfaces. rlhe plate is moved over the surface by manipulation of the hand t rch which is provided with the usual handle. n the act of moving the ironing plate 21 over the surface, the scraper blade 25 will be re quired to follow up the operation of burning the paint by scraping and removing the burned paint from the painted surface. By rotating the handle wheel 28, the scraper blade 25 may be made to project more or less from the pocket 25.

It will be appreciated from the foregoing that both burning and scraping operations are enabled to be carried on at one and the same time and that the expense 0f two implements for conducting these operations is dispensed with.

lt is obvious that various changes and modifications may be made in the details of construction and design of the above specifically described embodiment of this invention without departing from the spirit thereof, such changes and modifications being restricted only by the scope of the following claims.

That is claimed is l. A combined burner and scraper comprising, in combination with a` hand torch having a nozzle, a tube removably fitted over said nozzle, a sleeve removably fitted over said tube and carrying in advance of the tube a perforated plate, said sleeve havlng air openings therein, means for controllinoV the ort larea of the air o eninvs an.

ironing plate carried in advance of the perforated plate, and a scraper blade carried by the .ironing plate.

2. A combined burner and scraper comprising, in combination with a hand torch having a nozzle, a tube removably fitted over said nozzle, a sleeve carried removably by said tube and having an outwardly flaring portion, a perforated plate carried by the outwardly flaring portion, said sleeve having air duct-s therein, a rotary perforated cut-oft' plate mounted in connection with said ducts, an ironing plate supported in advance of the perforated plate, and having a flange eX- tending about the flaring portion, fastening means engaging the flange and the Haring portion, and scraping means carried by said ironing platef 3. A combined burner and scraper comprising, in combination ywith a hand torch having a nozzle, a tube removably fitted over said nozzle, a sleeve removably carried by said tube, perforated plate carried by the sleeve forwardly of the tube and forming chambers on both sides of said'perforated plate, an ironing plate carried forwardly of said perforated plate and having openings to the atmosphere about` the 'perforated plate, said ironing plate having a pocket therein, a scraper blade mounted in said pocket, and cam means for moving the scraper blade outwardly in the pocket.

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