US733719A - Multiple-drill attachment for drill-presses. - Google Patents

Description

No. 783,719- PATENTED JULY 14, 1903. F. A. KEHL & W. GOERS.

MULTIPLE DRILL ATTAGHMENT FOR DRILL PRESSES.

APPLICATION FILED MAY 26, 1902.

2 SHEETS-SHEET 1* N0 MODEL.

Attorneys.

No. 733,719. PATBNTED JULY 14, 1908.

I. A. KEHL & W. GOERS.

MULTIPLE DRILL ATTACHMENT FOR DRILL DRESSES.

APPLICATION FILED MAY 26, 1902.

N0 MODEL. 2 SHEETS-SHEBT 2.

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UNirEn STATES Patented Jul 14, 1903. I

PATENT OFFICE.

MULTIPLE-DRILL ATTACHMENT FOR DRILLyPRESSES.

SPECIFICATION formingpart Of Letters Patent N 0. 733,719, dated July 14, 1903.

Application filed May 26, 1902. Serial No. 108,921. No model-l T0 (tZZ whmn it may concern.-

Be it known that we, FRANK A. KEHL and \VILLIAM GOERS, citizens of the United States, residing at Detroit, county of lVayne, State of Michigan, have invented a certain new and useful Improvement in Multiple- Drill Attachments for Drill-Presses; and we declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to drilling-machines, and has for its object an improved attachment intended to be used with drill-presses or drilling-machines in which a large number of small regularly-arranged drills are contemporaneously driven by the single spindle of the drill-machine.

The attachment is especially intended to be used for the purpose of drilling holes in the burners of gas-stoves; but it may be used with advantage where it is desired to employ a larger number of regularly-arranged or regularly-grouped holes, and it will facilitate the rapidity of the work as well as its regularity.

The attachment consists of a plate arranged to hold a large number of small drill-spindles in fixed relation with respect to the bearing through which the main drill-spindle works, and it is arranged to drive all the spindles of the many drills which are employed by means of a single master-wheel, which rotates on the main spindle of the drill-press and from which motion is communicated to the smaller spindles by a number of submaster-wheels, each of which drives several of the small spindles, and by idlers which take up and carry forward motion, carrying it from one small spindle to another beyond the range of the sub-- master-wheels.

In the drawings, Figure 1 is a plan view showing the attachment of the small spindles of the individual drills and the attachment of the master and of the submaster wheels and of the idlers. This drawing is rather diagrammatic than pictorial. Fig. 2 is a vertical section or a section along the axis of a drillspindlc A, and it is taken at the line a a of Fig. 1. Fig. 3 is a section along the axis of the drill-spindle A and taken at the line b b of 1. Fig. 4c is a detail of a single small spindle and shows the means of holding the drill therein.

A indicates the spindle of a drill-press, gen erally placed in a vertical position and driven in bearings 2, which are arranged at the end of a bracket 011 the frame of the drill-press. To the bearing 2 is secured a collar at, which collar is secured tothe top plate at of the attachment.

The attachment consists of a main or body part 5, to which is secured, by screws or bolts, a cap-bearing plate 15, and this cap-bearing plate is provided with an annular collar 10, to the upper side of which is secured the top plate 4, by means of which the entire attachment is held to the drill-spindle. The main or body-plate 5 is provided with a large number of cavities that are nearly circular in cross-section and which extend into the bodyplate for substantially halfits thickness or slightly less than half its thickness. The circular cavities intersect each other or run into each other, and there are several sections in the plate in' which a number of circular cavities intersect in the way mentioned.

By referring to Fig. 1 there will be seen at the part shown as broken away a section containing a number of such cavities that inter sect each other, and there also appears the half of a second section in the part broken away. At other parts of the drawings similar cavities are indicated by dotted lines. Each section contains cavities in which can be placed the submaster-wheel 9, which is intermediate with and between the master-wheel 6 and the smaller drill-spindle wheels, here inafter mentioned, and also in which can be placed the spindle-wheels a b e (Z c fg h t, and also in which can be placed transfer-idlers 1 1" 1 1. The cavities for the several gearwheels extend to substantially the same depth in the body part 5 and intersect each other to allow of the intermeshing of the several wheels. The submaster-wheel 9 is journaled on a screw-stud 9, the upper end of which is supported in the ring 10. The submasterwheel 9 is preferably centered in a line which is intermediate between the inner circumference and the outer circumference of the ring 10, and the arbor of the submaster-wheel is thus held at both ends in a firm bearing.

The toothed part of the wheel projects above the upper surface of the cap-bearing plate 15, and its extending portion engages with the master-wheel 6, which is keyed to the spindle A. The end of the submaster-wheel 9, which is in the cavity, engages with a number of individual drill-spindle gears, which are journaled at their upper end in the cap-bearing plate 15 bypointed orcone bearings, and axles extend through the body plate 5 and terminate at their protruding lower end with chucks for holding the individual drills.

As shown in Fig. 1, there are in direct engagement with each submaster-wheel 9 five individual drill-spindle gears, two of which are in the-radial line on the opposite side of the submaster-wheel 9. The small or individual drill-spindle gears 1 actuate an offsetidler 1', which intermeshes with a third drillspindle gear, and this intermeshes with an offset-idler 1, which in turn aetuates the outermost of the radially-arranged individual spindles in one radial line of gears, and so also the gear-wheel g actuates an idler 1, which actuates the third gear-wheel in another radial line of gears. The gear 72 actuates an idler 1 which actuates the outermost gear 1'. From each submaster-wheel 9, as shown in this drawing, are actuated nine individual drill-spindles, each of which has an upper bearing in the cap-plate 15 and a lower bearing or spindle-bearing through the body plate 5, and all of which receive their primary actuation from the master-wheel 6 and the spindle A, and the holdingplates in which they are contained are stationarily fixed on the bearing 2, through which the spindle A is journaled.

Each individual spindle E is provided with a square socket 17 and is split at its lower extremity. It is provided with a threaded part 18 back of the socket, and its lower extremity is coned as well as split. An internally-coiled cap 19, provided with an internal thread, is arranged to be run over the lower point of the spindle, and these parts, taken together, comprisea chuckin which the small drills can be held.

In assembling the various parts the individual drill-spindles with the cone-caps removed but with their gears attached to them, preferably made integral with them, are inserted from the upper side through the body part 5, the chuck-caps 19 are run into place, the subm aster-wh eels 9 are dropped into their cavities on their bearing-stud 9, the masterwheel 6 is dropped into place, and the top plate 4 placed over the ring of the cap-bearing plate and secured thereto by screws. (See at 20 in Fig. 2.)

To use the device, it is placed on the spindle A of the drill-press with the key 73 in place and is held properly by set-screws 3, that pass through suitably-threaded holes in the collar 4: and engage against the bearing 2. Vhen motion is given to the drill-spindle A, the individual drills rotate at equal speeds and at a higher rate of speed than that of the main spindle A, and the individual drills are all protected from danger of breakage by the long bearings which each spindle has in the body 5 and by the long bearing which each drill has in its socket, and they are especially protected by the regularity and equality of the speed of all the drills.

Vhat we claim is In an attachment for drilLpresses, the combination of a body-plate arranged to be held to a fixed part of a drill-press, individual drill-spindles engaging through said bodyplate and having individual gear-wheels arranged in cavities in said body-plate, a capbearing plate for the ends of said individual drill-spindles, a submaster-wheel journaled in bearings that are fixed with. respect to said bod y-plate an d arranged to engage a plurality of individual drill gear wheels, a masterwheel arranged to be actuated by the main drill-spindle and to engage the submasterwheel, substantially as described.

In testimony whereof we sign this speci tication in the presence of two witnesses.

FRANK A. KEHL. \VILLIAM GOERS.

Witnesses:

CHARLES F. BURTON, ELLIOTT J. STODDARD.

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