US2471374A - Drill jack - Google Patents

Description

May 24, 1949. s. H. MCAFEE, JR

DRILL JACK Filed Oct. 27,1945

Inventor SAMUEL H l/cfla z fa Patented May 24, 1949 UNITED STATES ATENT OFFICE DRILL JACK Samuel H. McAfee, J r., Oakdale, Pa.

Application October 27, 1945, Serial No. 625,000

2 Claims.

My invention as described herein, and illustrated in the accompanying drawings, consists of a jack, an object of which is to provide a one man pressure drill.

Another object of my invention is to provide a jack for exerting pressure upon a drill.

A further object of this invention is to provide a reversible jack for either right or left hand pressure upon a power driven drill.

Another object of my invention is to provide a jack having means for attaching it to work to be drilled.

A primary object of my invention is the provision of means whereby pressure may be applied to a power drill or other like tool in places where common methods are not practical.

Other features and advantages will become more readily apparent from the following description and the accompanying illustrative drawings in which:

Figure 1 is a plan view of my jack,

Figure 2 is a side elevational view thereof operatively associated with a drill,

Figure 3 is an elevational view of a jack lever, and

Figure 4 is an edge View thereof.

While one embodiment of my invention is illustrated in the above referred to drawings, it is to be understood that they are merely for the purpose of illustration and that various changes in construction may be resorted to in the course of manufacture in order that the invention may be utilized to the best advantage according to circumstances which may arise, without in any way departing from the spirit and intention of my device, which is to be limited only in accordance with the appended claims. And while I have stated the primary field of utility of my invention it remains obvious that it may be employed in any other capacity wherein it may be found applicable.

In the accompanying drawings, and in the following specification, the same reference characters are used to designate the same parts and elements throughout and in which l designates the drill jack and II indicates a rack bar which consists of a channel iron l2, within and connected to the sides I3 and I4 of which are a series of semi-cylindrical fulcrum members l5 and I6, etc., suitably spaced apart and the open 2 sides I! of which face the integral T-head l8, of said member I2.

To the end I9, of the head I8, is secured the end 20, of an attaching bar 2|, by two bolts through holes or bores 22 and 23, and through the end 24, of said head are provided threaded bores 25 and 26, whereby by removing the bolts at holes 22 and 23, and changing end 20, of bar 2|, to seat on end 24, of the head I8, and then aflixing the same thereto by said bolts, a power drill 21, may be used on either the right or the left hand side of bar 2I'.

The end 28, of bar 2|, terminates in a vertically disposed inverted U or goose-neck flange engaging clip 29, whereby the jack may be attached to the vertical flange 30, of a bounding angle iron 3 I, for the floor plates 32, of a ship or other similar place. The operating lever 33, for the jack terminates at its lower end 34, in an offset cylindrical pintle 35, adapted to be operatively seated in any one of the members I5, I6, etc., whereby the lever may be manually operated to bear against the handle 36, of motor 31, by which the bit 38, is driven.

In operation, the goose-neck 29, is slipped down upon flange 30, and the drill suitably supported or seated upon the member II, then the jack is slid to position for the first bore, the power for the drill switched on and lever held against the handle and pressure gradually applied by the lever. After the bore is completed the jack is slid along the flange 30, to position for the next bore, etc. If bores are to be made in an adjoinin member or wall, above the edge 38', of flange 3. 3, a spacer block may be seated upon the rack member II, upon which the drill may be seated.

It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with the drawings. Therefore, a more lengthydescription is regarded as unnecessary.

Changes in shape, size and rearrangement of details and parts such as come within the purview of the invention claimed may be resorted to, in actual practice, if desired.

Having now described my invention that which I claim as new and desire to procure by Letters latent is:

1. A drill jack comprising an elongated rack bar having a longitudinal series of spaced transverse semi-cylindrical fulcrum members, an elongated attachin bar fixed to and extending forwardly from said rack bar and having an inverted hook on its forward end for engagement over a flange of a piece of work, said attaching bar being ofiset laterally with respect to the rack bar, and a vertical jack lever having a transverse pintle on its lower end selectively engageable in any desired one of the fulcrum members at the front of the latter.

2. The construction defined in claim 1, in combination with a plate-like head rigid with the forward end of and projecting laterally beyond opposite'sides of the rack bar, and-means to secure the attaching bar to the head at either side of the rack bar.

SAMUEL H. McAFEE, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

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