US419071A

US419071A - Drilling-machine

Info

Publication number: US419071A
Authority: US
Publication date: 1890-01-07
Anticipated expiration: 1907-01-07

Description

(No Model.)

P. H. RICHARDS. DRILLING MACHINE.

No. 419,071. Patented Jan.7,1890

N. PETERS Prawn-Lithographer. wmm nm D. c.

UNITED STATES PATENT QFFICE.

FRANCIS II. RICHARDS, OF HARTFORD, CONNEGTICU T, ASSIGNOR TO ECKLEY B. COXE, OF DRIFTON, PENNSYLVANIA.

DRILLING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 419,071, dated January '7, 1890.

Application filed December 6, 1888. Serial No. 292.845. (No model.)

To all whom it may concern: to said nuts, and at their upper ends are Be it known that I, FRANCIS l'I. RICHARDS, journaled in the brackets 21 and 22, respecta citizen of the United States, residing at ively, which are affixed to the under side of Hartford, in the county of Hartford and State the table T. A coupling-shaft 23 is also jour- 55 of Connecticut, have invented certain new naled in hearings in said brackets, and is and useful Improvements in Drilling-Mageared to the feed-screws l9 and 20 by the chines, of which the following is a specificasimilar pairs of gears 2t 25 and 26 27, respecttion. ively. Said shaft 23 also has a hand-wheel This invention relates to multiple drilling- 28, whereby to turn the feed-screws by hand. 60 1o machines, the object being to furnish a ma- By means of this organization of feed mechchine of that class especially adapted for sianism the table may be moved vertically multaneously drilling a series of holes, some either by hand or by power. \Vhen the nuts of which are in close proximity to others, and are not revolving, the operator may by means also to provide for the convenient and secure of the hand-wheel turn the screws in either 6 5 r 5 readjustment of the drills, together with their direction to raise or to lower the table, and driving-spindles, for the drilling of holes at when the shaft 23 is not revolving (andit may various distances apart. be clamped by a clamp-screw, not shown, if In the drawings accompanying and formthis is necessary or desirable) the feed-nuts ing a part of this specification, Figure 1 is a 9 and 10 may be revolved, as described, to 7b front elevation, partially in section,ofadrillfeed up the table. This being fed up far ing-machine embodying my improvements. enough, the clutch is then disengaged and Fig. 2 is a side elevation, also partially in secth table lowered by hand. Stops orlike welltion, of the same. known devices (not shown) may be employed Similar characters designate like parts in to hold in place on said table the piece to be 75 all the figures. drilled.

The framework of my improved drilling- That part of the frame-work which immemaehine consistsof some suitable column A, diat-ely carries the drilling mechanism conwhich carries the drilling mechanism and has sists in a cross-beam B, carried on the coldevices for supporting the table T, on which to umn, and having the upper and lower ribs so place the pieces to be drilled. These devices 31 32, respectively connected by the vertical consist, as shown in the drawings, of vertical wall or back plate 33 of said beam, and also ways on the frame-work and furnished with having bearing 3l 35 for the worm-shaft 36. caps 2 and 3 for the slide S. In said ways This principal driving-shaft has, as shown in the feed-shaft 4 has its bearings, and said the drawings,apulley37, whereby it is driven, S 3 5 shaft 4 has fixed thereon worms 5 and 6, meshand a pulley 38, for carrying the feed-belt 39, ing with the worm-wheels 7 and 8, that are affor driving the lower feed-pulley 11. It will fixed to the revolving nuts 9 and 10 in some be obvious, however, that these pulleys may well-known manner. The shaft 4 is driven be replaced by othersor by different devices by a clutch-pulley 11, and an ordinary sliding for like purposes without thereby modifying 9o clutch 12, splined on said shaft, is provided my invention.

with the usual handle or lever 13 for operat- The spindle-heads 0, each carrying one ing the same. This lever is or may be cardrill-spindle to, which is provided with a ried by a pivot lat on the bracket 15, projectsuitable drill -11, are adjustably secured upon ing from the frame-work. By throwing the the front of the said beam B by some well- 5 5 handle 16 of lever 13 toward the right hand known means as, for instance, the straps 42 in Fig. 1 the pulley 11 is engaged through 43 and clamp'screws H. The worm 36 meshes said clutch to turn the shaft 4, and through with a worm-wheel on each spindle. These this shaft and the gearing described to revolve worm-wheels are what I call half-wheels, the nuts 9 and 10, which are carried in the being the ordinary form of worm-wheel di I00 bearings 17 18, respectively, on the framevided in the center at right angles to the work. The feed-screws 19 and 20 are fitted spindle-axis. The said wheels are placed on the spindles alternately above and below the center line of worm 36, so that the upper wheels can overlap the lower wheels 46, and thus permit the spindles to be set more closely together than otherwise on the beam B. This feature is especially well shown in that part of Fig. 1 in which the two heads 0 (shown in section) are set in close proximity to each other .and with the wheels one extending over the other.

The heads 0, being narrow and of considerable height, require some guide to keep them vertical in addition to their short contact upon the upper and lower edges of the beam B. Accordingly I make in said beam two grooves or channels 48 50 and construct each of said heads 0 with a guide-bar fitted head can pass under the next adjoining head,

and thus does not interferewith the setting of the heads on the beam one contiguous to another.

The upper bearing for the spindle has a step 61, which is retained by a check-nut 63 and takes the upward thrust of the spindle.

This thrust tends strongly to spring the head G, which cannot in practice be conveniently made rigid'enough in its curved part 65, Fig. 2, to resist that thrust without flexure. To obviate this objection and preserve the wellknown advantages of a step-bearing, I make a ledgeor notch 66, under which the head C is constructed to engage, so that the thrust on step 61 is directly transmitted to the beam at said point 66.

To adjust the head 0 to any required position on the beam, it is only necessary to slacken the screws 4A, Fig. 2, when the head may be slid along, the worm-wheel rolling in the Worm 36 as a gear in a rack The screws being then retightened, the spindle thus ad justed is ready for use.

1 Having thus described my invention, I clai1n 1, In a drilling-machine, the combination, with a spindle-supporting beam, of spindleheads having upper and lower bearings on said beam and the auxiliary guides interme-.

diate such upper and lower bearings, sub stantially as and for the purpose specified.

2; In a drilling-machine, the combination, with a spindle-supporting beam, of spindleheads having engagement with the upper and lower sides of said beam, the auxiliary guides intermediate such upper and lower sides, a

worm located for driving the spindles in said heads, and half-wheels on said spindles arranged alternately above and below each other, substantially as and for the purpose shown. 3

3. In a drilling-machine, the combination, with a spindle-supporting beam provided in its face with the auxiliary guideways or channels, of the spindlerheads having blocks in en.-

gagement with such guideways, substantially as andfor the purpose set forth,

4. In a drilling-machine, the combination of the beam having two guide-bar channels, substantially as described, and heads adjustable lengthwise of said beam over said channels, one of said heads having a guide-barlying in one channel and adapted to extend therein under a contiguous head, all substantially as described.

5. In a drilling-machine, the combination, with the beam having the ledge 66, of the spindle-head adjustable on said beam in engagement with said ledge and having the step 61, substantially as described.

6. In a drilling-machine, the combination of a frame-work, the table carried on a slide, the feed-screws, one on either side of said slide and both journaled in bearings on said table, a coupling-shaft and gearing, substantially as described, carried on the table and operatively connecting said screws, (whereby the screws may be'turned by hand,) a pair of revolving feed-nuts carried by the framework and engaging said screws, and a feedshaft and gearing, substantially as described, operatively connecting said nuts, whereby the table may be fed up by power, substantially as described.

FRANCIS H. RICHARDS.

Vitnesses:

SAML. W. POWEL, HENRY L. RECKARD.