US2424286A - Burner cradle - Google Patents

Description

Y July 22, 1947. BI Q ROBBlNS 2,424,286

BURNER CRADLE Filed May 25, 1945 fffm.

Patented July 22, 1947 UNITED STATES PATENT OFFICE BURNER CRADLE- eenjamin e. Robbins, Baltimore, Ma;

Application May '25, 1943,: Serial No.488j423' This invention refers to tools for welding and cutting with flames of heated gases or electric arcs and the like. More particularly, it pertains to a manipulating carriage for carrying the burner creating the flames and-guiding it through predetermined courses or lines. It has among its objectsto provide a carriage that will keep the burner at an active distance from the ground or surface treated by it, so its ames will not become interfered with or smothered. Another object is to have the device capable of burning round, straight or irregular contours into the material selected for the operation. A further object is to have the carriage adapted for carrying the burner at various angles in regard to the plate operated on. A still further object is to have the stand arranged for rigid attachment to the plate operated on without the use of conventional mechanical boltings; and so designed that it can be set accurately on a point selected and be kept there, in avery accessible and convenient manner.

Other objects will become apparent as the invention is more fully set forth.

In the drawings, which illustrate -an embodiment of this invention:

Figure 1 is a plan view of a device embodying this invention;

Figure 2 is a side elevation of Figure 1,

Figure 3 is a section taken along line 3-3 of Figure 2.

Figure 4 is an end view showing the roller;

Figure 5 is an end View showing the base partly in section, and

Figure 6 is an end view similar to Figure 5, except the square end of the punch is placed in the slot to guide the burning torch in a straight instead of a circular line.

Similar reference characters refer to similar' parts throughout the drawings.

In these drawings, a stand I is provided for the device in general to operate from. This stand has a flat bottom surface lil, suitable for contact with the surface 26 of the material to be operated on. It is made relatively heavy and solid so it will act in a very stable manner. rIhe bottom section 3' is partly square and converges into a trapezoidal surface Il whose apex portion 5 is nattened and surmounted with a slot This stand is preferably made of magnetic metal so it will stick to ferrous metal surfaces on which it operates and is cupped out in a series of hemispherical recesses 'I that will provide a suction action to reduce its tendency to slide on the plate on which it is located and made-ready. This stand is also provided with slanting passages 8 that serve to 2 Claims. (Cl. 266-23) 2 permit inspection of the surface of the plate below the center of the stand; When a spindle pricl:

punch II` is inserted through a vertical centralY holeQfin-the'stand, its point will be located at thecenter of the stand in the bottom surface space-at I0; When the punch islocated in a holev pricked underneath it in theplate I2 to be operated on; the stand will be located centrally thereon. The punch has an elongated square head 33 and is adapted to project through the body of the stand and serve as a center on which an arm I3 can swing circularly around. The punch spindle has a hole 3| for the arm I3 to slide through. This arm is made adjustable at I4 in length, so as to increase or decrease its radial swing about the center of the stand. The arm I3 is attached to a carriage I5 at the external end portion. This carriage has a pair of wheels I5 and I 'I respectively positioned to run in the circles arranged for by the adjusted arm mechanism. They are held together by an axle piece I8 extending transversely between them and supporting a burner holder I9. The latter is adjustable at any suitable inclination over a range of angles 20 as indicated on the gauge plate 2l. The thumb nut 22 and pressure plates 23 serves to hold the adjustment after the burner has been set in the holder. The holder holds the burner 24 straight along the diametrical line vertically marked across this plate, when in normal position. A roller 32 supported by arm 25 attached to the burner holder I9 in the gauge plate 2l is used to follow a center line on surface 26 of the material worked on to guide the burner travel and prevents the burner from getting too low and endangering its smothering out. The wheel IS is held in place on arm I 3 by collar 33, the wheel Il is attached to the axle piece I8 by washer 3&1 and screw 35.

When it is desired to use the device for straight line burning its stand I is turned so its rails 21 will serve as a guide for the travel of the burner. The punch II is raised out of the hole 9 to avoid its obstruction with this travel and slides across the rails. The stand is turned bodily in the direction of travel so the burner can take the predetermined course.

The attachments to the burner or details of its conventional construction are not elaborated in the drawings or descriptions as it is appreciated that this already is Well known to the art.

While but one general form of the invention is shown in the drawings, it is not desired to limit this application for patent to this particular form or in any other way otherwise than limited by 3 the scope thereof, as it is appreciated that other forms could be made that would use the same principles and come within the scope of the appended claims.

Having thus described the invention, what is claimed is:

1. In combination with a burner manipulating device of the class described comprising in combination a magnetic base having a passage therethrough, said passage being adapted to receive a prick punch attachment therein for marking and positioning material placed under the stand in a predetermined location, an adjustable oi-set arm mounted on the base and adapted to travel in predetermined directions, a carriage with a plurality of wheels to support and prevent the carriage from turning over, a burner mounted on the carriage and arranged to be positioned at predetermined angles thereto.

2. In combination with a burner manipulating device of the class described comprising in combination a magnetic base having a passage therethrough, said passage adapted to receive a prick punch therein for marking material upon which the magnetic base is located, an off-set arm adjustably attached to said base and adapted to travel in predetermined directions, said off-set arm having an extension at one end thereof to which is slidably attached an elongated square headed prick punch for placement in said magnetic base, for rotative or aligned movement in relation to said base, a rotatable disc forming part of said off-set arm, a burner mounted on said rotatable disc and arranged to be held in predetermined locations thereto.

BENJAMIN C. ROBBINS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,931,696 Hedenstrom Oct. 24, 1933 842,662 Heydrick Jan. 29, 1907 1,162,587 Eimann Nov. 30, 1915 1,317,425 Bryce Sept. 30, 1919 1,505,106 Schroder Aug. 19, 1924 1,176,584 Madgett Mar. 21, 1916 1,051,547 Bucknam Jan. 28, 1913 2,055,527 Glaum, Jr., et al. Sept. 29, 1936 1,141,192 Klensk June 1, 1915 FOREIGN PATENTS Number Country Date 331,083 Germany Dec. 29, 1920 254,654 England July 8, 1926 469,577 Germany Sept. 13, 1929 539,216 Germany 1931

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