US42914A - Improvement in boring-machines - Google Patents

Description

UNITED STATES PATENT OFFICE.

SAMUEL U. KING, OF WINDSOR, VT., ASSIGNOR TO THE LAMSON St GOODMAN MANUFACTURING COMPANY, OF SIIELBURNE FALLS, MASS.

IMPROVEMENT IN BORING-MACHINES.

Specification forming part of Letters Patent No. 4*),9LL dated May 24, 1864.

To all whom it may concern:

Be it known that I, SAMUEL U. KING, of Windsor, in the county of `Windsor and State of Vermont, have invented a new and Improved Boring and Drilling Machine; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure l is a side sectional view of my invention, taken in the line x w, Fig. 2; Fig. 2, a front elevation of the same.

Similar letters of refe-rence indicate correspondin g parts in the two figures.

This invention relates to a new and useful attachment for boring and drilling machines,

such as are provided with a sliding frame for holding the auger or drill arbor.

The invention consists in the employment or use of an adjustable rack bar arranged in connection with the gearing, by which motion is imparted to the drill arbor in such ainanner that the sliding frame may, when it has reached the lowest point of descent, or at any time when it is desired to raise the auger or drill, be readily raised by throwing the rackbar in contact with one of the wheels of the auger or drill driving gear, and while said gear is being turned in the proper direction for operating the auger or drill, the rack-bar being thrown out of gear when it is desired to lower the sliding frame, by simply turning the driving-shaft a short distance in a backward or reverse direction.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents a base-plate, to which two uprights, B B, are attached, said uprights being connected by a cross-bar, G, at their upper ends; and D is a sliding frame, which is.

tted to guide plates a a on the front side of the uprights B B, in such a manner that it may slide freely up and down thereon.

E is an arbor, which is fitted vertically in the frame D, and is provided with a socket, b, at its lower end to receive the auger or drill, the latter being secured in the former by a set-screw, c. On the upper end of the arbor E there is fitted av bevel-wheel, F, into which a bevel-wheel, G, gears, the latter being on a shaft, H, the bearings of which are on the frame D. The shaft H has a crank, d, on each end of it. The bevel-wheelGhas, besides its bevel-teeth, teeth e, which are parallel with the shaft H, as shown clearly in Fig. 2.

The sliding frame D, with its auger or drill arbor E and driving shaft H, may be arranged in the same way as those ofthe ordinaryboring or drilling machines, and therefore do not require a more minute description.

I represents a rack-bar, the lower part, f, of which has an oblique position relatively with its other part, as shown clearly in Fig.

l, and the upper part of said rack-bar has an oblong slot, J, made in it, the lower end, g, of which is curved forward toward the sliding frame D. The lower oblique part, f, of the rack-bar I is fitted within a guide, h, attached to one of the uprights B, and a screw, i, passes through the slot J into a projection, j, attached to the same upright B to which the guide It is attached. When the rack-bar I is elevated so that the screw t' will be in the lower curved part, g', of the slot J, the rackbar I will be-out of gear withthe teeth c of the wheel G, as shown in black in Fig. l, and when said rack-bar is lowered by shoving forward the upper part of the rack-bar the latter will drop in gear with the teeth c of wheel G, as shown in red outline in Fig. l. IVhen the auger or drill is at work, the rack-bar I is out of gear with the wheel G, and the sliding frame D settles or works down under its own gravity as the auger or drill progresses in its work of turning the shaft H. At any time when it is desired to raise the auger or drill and frame D the operator or attendant shoves forward the upper end of the rack-bar I, so that the screw i will be out of the lower curved end, g, ofthe slot J, and the raclcbar immediately drops in gear with the teeth e of the wheel G, and by turning the shaft H in the saine direction that it was turned in drilling the frame D will be elevated. The frame l) is retained in an elevated state by means of a catch, K, attached to the top of the frame D, and so constructed and arranged as to catch over the cross-bar C when the frame reaches its highest or culminating; point, and When the frame reaches this pointl the rackbar I is thrown out of gear by turning the shaft H in a reverse direction, and the frame D when released from the cross-bar C admits of the anger or drill being again adjusted to its Work. Thus by this simple arrangement the operation of the machine is greatly facilitated.

Having thus described my invention, what I claim as new, and desire t0 secure by Letters Patent, is

'lhe combination of the rack I, guide h, curved slot j, and stud i, when applied to a boring and drilling machine and operated as herein described. v

SAMUEL U. KING. Witnesses:

CARLOS COOLIDGE, WILLIAM HARRIS.

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