US790268A - Portable drill. - Google Patents

Description

No. 790,268 PATENTED MAY 23, 1905.

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PORTABLEv DRILL. APPLICATION FILED SEPT. s, 1904.

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' No. 790,268.. PATENTED MAY 23,1905

P. R; ANTON.

PORTABLE DRILL.

APPLIUATION FILED SEPT. 6. 1904.

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Patented. May 2?, 1905.

PATENT OFFICE.

PAUL R. ANTON, OF TOPEKA, KANSAS.

PORTABLE DRILL.

SPECIFICATION forming part of Letters Patent No. 790,268, dated May 23, 1905.

I Application filed September 6, 1904. Serial No. 223.370.

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Be it known that I, PAUL R. ANTON, a citizen of the United States of America, residing ,in the city of Topeka, in the county of Shaw nee and State of Kansas, have invented new and useful Improvements in Portable Drills, of which the following is a specification.

The invention has reference to the adjustable frame for securing the drill to variations in the shape of the work, also to the means for securing the drill-bitto the spindle or chuck, to the automatic feeding mechanism, and to the gearing attachment, making the drilling quick and eas Aportable drill of the kind herein described is especially adapted for drilling holes in iron columns and I-beams embedded in place in the building for the purpose of attaching awnings thereto, although its use is not restricted to that purpose only.

Objects of the invention are to improve generally upon drills of this nature; to provide an adjustable frame for securing the drill to columns and I-beams embedded in place in the completed building, especially adapted for use in attaching awnings, awnmgfixtures, lamps, signs, brackets, and the like thereto; to overcome the tendency of the drill-bit to bite through the thin portion at the finishing of the hole; to provide an especially eflicient automatic feeding device, and to provide a portable drill adapted to the class of work mentionedwhich is light, strong, and durable, simple and efficient in construction and operation, and readily adjusted and applied to and removed from any such work; and my invention consists of the novel parts, improvements, and combinations, the preferred form of the embodiment whereof is hereindescribed and claimed, and shown in the accompanying drawings, forming part of this specification, and in which- Figure 1 is an elevation view of the drill, assuming it to be applied to a vertical column, the driving-gear and its shaft being removed. Fig. 2 is a top view thereof com- Fig. 3 is a vertical central sectional view through the line 3 3 of Figs 1, 2, and 4. Fig. 4 is a sectional view through the line 4 4 of Figs, 2 and 3. In Figs. 1 and 2 is shown in dotted outlines a means for operating the feed-cylinder by hand, the full outlines in all the figures showing the drill equipped with the automatic feeding device.

Like letters of reference indicate like or corresponding parts throughout the several views. d

On the gas-pipe A, which forms the mainframe rod, are adjustably secured by setscrews 1) I) the sleeves B B, which are provided with sockets in which are adjustably secured by set-screws c c the clamping-arms C 0, through the outer ends of which are the pointed set-screws 0 a, respectively. Also on the gas-pipe A, between the two adjustable sleeves B B, is adjustably secured, by means of the set-screw d, the drill-box D. Screwed into a part of the drill-box is the brace-rod E, having an opening 0 to permit the extension therethrough of the gear-shaft R, hereinafter to be described, and at its lower end an opening 6, in which may be adjustably secured the rod F by means of the set-screwf. The drill-box has an internally-threaded portion G, into which is screwed the correspondingly externally threaded feed-cylinder H, within which is rotatably held the drill spindle or chuck I, in which is secured the twist-drill J by means of the countersunk set-screw 'i. The feed cylinder has an enlarged head h, and an oil-hole h ermits lubricationof the drill-chuck. The ceding may be eifected by hand or automatically. If by hand, then, as indicated by the dotted outlines in Figs. 1 and 2, the crankKmaybe secured to the Outer end of the chuck or spindleI by means of the countersunk set-screwi (similar to the set-screw i) dle, and spokes in the manner just described.

The head h has a series of notches h h, so as to form a ratchet. The pinion L is keyed by the countersunk set-screw 'L to the outer end of the drill chuck or spindleI. .Secured to the inner side thereof by screws m m is an arm M, to the outer end of which is pivoted the pawl or dog N by means of the countersunk pivot-screw n. The engaging end of the pawl is kept in natural tendency to engage the notched head by the spring O, which is fixed in a slotted lug 0 on the pawl and which bears against the pin m, projecting from the rearward extension m of the arm M. The collar U, having a peripheral depression at mounted on the unthreaded portion of the feed-cylinder and adjacent to the head h, is of slightly larger diameter than the head. It is held against rotation with the cylinder by the rod V, reciproeatingly extended through the portion 12 of the drillbox, so as to permit its backward and forward movement without partaking of the rotary motion of the cylinder. The pawl N is Wide enough to engage both the head h and the collar U, from which it may be understood that the pawl will engage the notches 71/ only when passing along the depression u. As shown in the drawings, the pawl will be uided by the collar U and will move the feed-cylinder head one notch each revolution. It is to be understood, however, that by increasing the length of the depression 11. the cylinder may be moved more than one notch at each revolution, thereby increasing the speed of the feeding as may be desired.

To drive the pinion, I provide an internally-geared drive-wheel P, to which is fastened the crank p, provided with the handle 1). The drive-gear is mounted on the shaft R, which is secured in a part of the drill-box D by set-screw d and which may be extended for additional rigidity and to prevent the unscrewing of the brace-rod E through the opening e of said brace-rod E. The hub S of the drive-gear has a hollow portion in which, between the shoulder 8, formed thereby, and the head 1 of the shaft R, is the compression-spring T, which serves to keep the drive-wheel in close engagement with the pinion L'as the latter is moved back and forth by the operation of the feeding mechanism. It will be found, however, in actual practice that the necessity for this spring is not great, as there is nothing tending to disengage the gear from the pinion, and the operator naturally will bear the drive-gear against the pinion.

The operation is as follows: To apply the drill to the work, if it be, for instance, a vertical column the sleeves B B should be first adjusted to the approximate width of the column and there set by set-screws b b, so that the clamping-arms C C will approximately embrace the sides of the column. The arms C C may be lengthened or shortened and secured by set-screws 0 c. The pointed setscrews cc are then screwed down tightly into depresslons made with a center-punch, I so that the points engage the sldes of the column firmly to hold the frame and drill to the work. The rod F engages the face of the column and may be nicely adjusted to set the drill at exactly right angles to the work or at any other angle which may be desired and prevents the frame from oscillating or turning on the pivots formed by the pointed setscrews cc. The drill-box may be adjusted to any point on the gas-pipe A by means of the set-screw d. The drilling is accomplished by applying the hand to either one of the handles, as above described, and in case of handfeed the feeding may be accomplished by turning the feed-cylinder by the other hand, as the case may be. here the contour of the column in cross-section is such that the arms C C, as shown in the drawings, are not long enough, obviously longer arms may be provided.

In case the drill is to be used on an I-beam or like structure then the pointed set-serens c 0 may be turned around and pointed outwardly, asindicated in dotted outlines in Fig. 2, either by turning the arms C C half-way around or by taking out the pointed setscrews 0 c and screwing them in the other way, and in this way they may be adjusted and screwed into the inner face of the flanges of the beam, while the rod F may rest against the web, thus holding the drill firmly in place while drilling into the beam.

It will be clear that the driving-gear above described may be used in. connection with the pinion and without the automatic feed if desired, and also that the feeding-pawls might be pivoted directly onto the crank-arm if a more rapid feed should be desired.

Although the foregoing illustrates and describes the preferred form of the invention, it will be understood that I do not intend to limit myself unduly to the exact description herein or in the drawings and that l eontemplate changes in form, proportions, and size and the substitution of equivalent members, so as to adapt the machine to all cir cumstances within the spirit of the in vention.

What I claim is The combination with the main-frame rod and the drill operatively mounted thereon; of the two clamping-arms adjnstably sr-scnred to the main rod on opposite sides of the drill; the pointed set-screws on the clamping-arms to engage opposite facesrespeetively of the work; and the adjustable brace-rod to engage the front face of the work; substantially as set forth.

In testimony whereof I have hereunto set my handin the presence of witnesses.

PAUL R. ANTON.

WVitnesses:

JOSEPH GROLL, Z. T. Frsmm.

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