US1148365A - Speed-drill. - Google Patents

Description

J. DUVAL.

SPEED DRILL.

APPLICATION FILED SEPT- 11. 1914.

1 148,,365u Patented July 27, 1915.

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JOHN DUVAL, OF GRAND JUNCTION, COLORADO.

SPEED-DRILL.

Application filed September 17, 1914.

To all whom it may concern:

Be it known that I, JOHN DUVAL, a citizen of the United States, residing at Grand Junction, in the county of Mesa and State of Colorado, have invented a new and useful Speed-Drill, of which the following is a specification.

The invention relates to improvements in drills.

The object of the present invention is to improve the construction of drills and to provide a simple, practical, and efficient tool which will be smooth and easy in its operation, and capable of rapidly boring either metal or wood.

\Vith these and other objects in view the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawing, and pointed out in the claims appended hereto, it being understood that various changes in the form, proportion, size and minor details of construction, within the scope of the claims, may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawing, Figure 1 is a side elevation of a speed drill constructed in accordance with this invention. Fig. 2 is an en larged sectional view through the case, the gears and ball bearing being shown in ele vation. Fig. 3 is a similar view, the gears and ball bearing being shown in section. Fig. 4 is a sectional view through the gear case on the line 4l4: of Fig. 2. Fig. 5 is a sectional view through the case on the line 5-5 of Fig. 3. Fig. 6 is a detail sectional view through one of the sections of the case.

Like numerals of reference designate corresponding parts in all the figures of the drawing.

In the accompanying drawing, in which is illustrated a practical embodiment of the invention, the drill comprises in its construction a brace member 1 having a crank bend 2 carrying a rotary handle 3 of the ordinary construction. The brace member 1 is provided at its inner or rear end with a rotary head or stock 4, adapted, when the tool is used by carpenters for wood boring, to be arranged in the pocket of the belt commonly employed by such mechanics. The outer terminal portion of the brace member constitutes a shaft section 5, arranged in alinement with a chuck shaft section 6, which carries a bit chuck 7 of any preferred con Specification of Letters Patent.

Patented July 2'7, 1915.

Serial No. 862,228.

struction. The shaft sections 5 and 6 are tangular gear case 10, divided centrally in a plane in parallelism with the side faces of the gear case to form two similar sections 11. The sections 11, which have interior recesses to form a chamber 12, are provided at their inner and outer ends with similar exterior attaching flanges 13, secured together by screws 14 or other suitable fastening device, and provided with the said bearings 8 and 9, and also with alined bearings 14: for the reception of a counter-shaft 15, which is connected by inner and outer sets of gears with the shaft sections 5 and 6.

The shaft section 5 has its terminal 16 reduced to form a terminal journal which fits in a bearing socket 17 in the inner end of the shaft section 6. The said shaft section 5 has suitably'fixed to it a spur gear wheel 18, which meshes with a spur pinion 19, suitably fixed to the inner portion of the countershaft 15. The counter-shaft has mounted on its upper portion a spur gear wheel 20, which meshes with a spur pinion 21 of the shaft section 6. The outer set of gears is suitably fixed to the countershaft and the outer shaft section 6, and the inner and outer sets may be of any desired diameters to increase the speed of the outer shaft section6 and the bit chuck carried thereby, to the desired extent. lVhen-the brace member is turned in the usual manner, motion is communicated therefrom through the inner and outer sets of gears to the outer shaft section 6, which is rotated at a relatively high rate of speed, thereby effecting rapid boring either in metal or wood.

In order to render the drill or brace easy running, a ball bearing is interposed between the gear wheel 18 of'the inner shaft section 5 and the pinion 21 of the outer shaft section 6. The ball bearing, which is supported in recesses 22 of alined abutting transverse webs 23 of the sections of the gear case, is composed of race way plates 24', having oppositely faced channels for the reception of anti-friction balls 25 and arranged in a retaining or holding ring 26. The ring 26, which is flanged at its side edges to partially embrace the race way plates, fits snugly within the opening formed by the recesses 22 of the webs 23. The antifriction balls are interposed between the race way plates, which contact with the gearwheel 18 and the pinion 21. The said plates 2% are adapted to rotate independently of each other and reduce the friction to a minimum and provide a smooth, easy running tool. The ball bearing has a central openinginto which extend the interfitting ends of the shaft sections 5 and 6.

One of the sections of the gear case is equipped with a handle 27, which, in the use of the tool, is conveniently held in the chuck shaft section also journaled in the gear case, said shaft sections being arranged in alinement and having contiguous inner ends, gears mountedon the said shaft sectionsand arranged in spaced relation at the inner ends of the same, and an annular ball bearing surrounding the inner ends of the shaft sections and interposed between the said gears, said ball bearing having independently rotatable plates in contact with the gears, a countershaft carried by the gear case, and other gears mounted on the countershaft and meshing with the said gears.

2. A tool ofthe class described including a gear case composed of sections fitted together and having bearings at their meeting edges, said gear case being also provided with abutting webs provided with registering recesses forming an opening, a brace member having a shaft section journaled in one of the bearings, a bit chuck shaft section alined with the said shaft section and journaled in a bearing of the gear case, a countershaft journaled in other bearings of the gear case, separate sets of inner and outer gears connecting the countershaft with the shaft sections, and a ball bearing mounted within the opening of the said webs and interposed between the gears of the shaft sections and having independently rotatable portions in contact with the said gears.

8. A tool of the class described including a gear case divided on the plane in substantial parallelism with its side faces to form two sections, the latter having front and rear abutting attaching flanges provided with inner and outer pairs of bearings, said sections being also provided with alined abutting webs having registering recesses forming an opening, a brace member having a shaft section journaled in one of the inner bearings, a bit chuck shaft section alined with the said shaft section and journaled in one of the outer bearings, said shaft sections having interfitting ends located at the opening formed by the webs, a countershaft journaled in the otherv bearings of the gear case, inner and outer sets of gears mounted on the countershaft and the shaft sections, and a ball bearing arranged within the opening of the said webs and surrounding the interfitting ends of the shaft sections and having independently rotatable portions in contact with the gears of the shaft sections.

In testimony that I claim the foregoing as my own, Ihave hereto atlixed my signature in the presence of two witnesses.

JOHN DUVAL.

Witnesses r R. E. STARR, l/V M. CAMPBELL.

Copies of this patent mayv be obtained for five cents each, by addressing the Commissioner of Patents,

7 Washington, D. C.

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