An Improved Drill Stand and Drill Feed for Use in Boring Metal Pipes.
Year: 1895

page_text: Date of Application, 29th Oct., 1895
Complete Specification Left. 27th July. 1896-Accepted. 5th Sept.. 1896
PROVISIONAL SPECIFICATION.
An Improved Drill Stand and Drill Feed for Use in Boring
Metal Pipes.
JOSEPH WILBY Cotton Carder Grove Place Elland Yorkshire do hereby
declare the nature of this invention to be as follows:-
The object of this invention is to get the drilling spindle and drill of a hand-
drilling machine for pipe boring in the centre of the drill stand or frame, for the
purpose 1st of making the drilling apparatus more compact, and 2nd of securing
greater stability and firmness in the drilling mechanism while boring, than has
heretofore been attainable.
In carrying out my invention I make this new drill stand, or frame, with two
upright pillars instead of one as heretofore, which are joined together integrally
at their upper ends by a cross piece or bridge, which cross piece is provided with a
round protuberance, or boss, on the middle part of its upper surface.
The lower ends of these two pillars are joined integrally with a base, or foot,
which base is concave in one direction on its underside in the middle portion
of its length, so that the stand will sit on the convex surface of the pipe to
be bored.
The base is provided with a hole in its centre, through which the drill passes to
the metal to be bored, while each end of the base beyond the curved portion, is flat,
and is provided with a hole by which the stand can be clamped to the pipe in the
ordinary way by chain or other means.
The new arrangement for feeding the drill with this new form of drill stand is
as follows. The boss in the middle of the bridge of the stand is bored, and screw
threaded, and a hollow collar three or four inches long, and resembling a short
length of pipe, has a male thread for the greater part of its length to suit this
screw threaded hole, and the upper part of the screw threaded collar is provided
with a crosspiece, which is securely fastened to it by set screw, or other means,
which cross piece serves as a double handle to rotate the collar, and so feed the
drill as will hereafter be shewn.
The spindle of the drill passes through this screw threaded long collar in the
middle of the bridge, and the upper end of the spindle is provided with a handle,
or a ratchet brace without feed arrangement, by means of which continuous, or
intermittent rotary motion is imparted to the spindle, and drill when boring.
The drill stock on the lower end of the spindle bears against the long screw-
threaded collar when the drill is in action, and the drill is fed by screwing the
collar downwards against the stock of the drill by means of the cross piece secured
to its upper end.
Two other arrangements can be used for feeding the drill with this new
form of drill stand, both of which feed arrangements are ordinary and in
common use.
1st. Instead of a hollow collar with male thread, a similar solid threaded part
can be used, which is provided with a cross piece, or handle at its upper end to
turn it, and a countersunk recess at its lower end, which recess takes the conical
point of an ordinary ratchet brace. In this case the drill is fed by screwing the
solid threaded part against the ratchet brace in the ordinary manner.
2nd. The bridge of the drill stand instead of being bored, and tapped, can
have a countersunk recess in the middle of its undersurface, to take the conical

page_text: point of an ordinary ratchet brace, having the ordinary feed arrangement in
itself.
Dated this 28th day of October 1895.
An Improved Drill Stand and Drill Feed for Use in Boring
Metal Pipes.
JOSEPH WILBY Cotton Carder Grove Place Elland, Yorks, do hereby
declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement :-
The object of this invention is to get the drilling spindle and drill of a hand
drilling machine for pipe boring in the centre of the drill stand or frame for the
purpose 1st, of making the drilling apparatus more compact and 2nd of securing
greater stability and firmness in the drilling apparatus while boring than
heretofore.
In order to assist in the complete understanding of my invention by those skilled
in the art to which it relates I hereto annex a sheet of explanatory drawings
wherein Fig. 1 is a front elevation of my improved drilling apparatus Fig. 2 is a
side elevation of same while Fig. 3 is a view of a handle for same.
In carrying out my invention I make the frame or stand A B C D of my
improved drilling apparatus integral or all in one piece as shewn in Figs. 1 and 2,
and I make it preferably of cast steel or malleable cast iron so as to give strength
with light weight. The stand or frame consists of two uprights A A. Fig. 1,
extending upwards from the edges of the base B B to the neck or boss C. The base
or foot of the stand is made of the shape shewn in Figs. 1 & 2 B B so that it will sit
firm on various sizes of pipes and said base is provided with a hole in the centre two
or three inches diameter through which hole the drill passes to the metal of the
pipe to be bored.
Near to the top of the uprights or pillars A A are double ears or lugs D D
which are integral with the pillars between which lugs are hinged by rivet or pin
the flattened ends of the screw threaded rods E E so as to be capable of henging at
any desired angle. These rods screw into the long cylindrical nuts F F. The
bore of about ths of an inch of the lower end of these long nuts is less than
the threaded portion and a straight piece of round iron provided with a shoulder at
one cul is passed through the nut and afterwards bent into the shape of a hook as
shown at G G.
The shoulder of the hook rests on the top of the shoulder made by the contracted
bore in the nut as shewn in section at W Fig. 1, which allows rotary motion to be
given to the nut while the hook remains stationary.
To fix the drill to the pipe to be bored a chain is passed around the pipe in the
ordinary manner and linked to the hooks G G. The chain is then tightened by
screwing the long nuts F F by a key.
The arrangement for feeding the drill is as follows. The boss C. Fig. 1. is bored
and tapped and a hollow collar H six or eight inches long and resembling a short
length of pipe is provided with a male thread for the greater part of its length to
suit the screw threaded hole in the boss C and the upper part of the screw threaded
collar is provided with a cross piece 1. Fig. 1. securely fastened to it which serves
as a handle to rotate the collar and so feed the drill as will hereafter be shewn.
The drill spindle K passes through the long collar H, and the upper end of the
spindle is provided with a ratchet brace L as shewn in Fig. 1, which is actuated by
a lever or arm M which gives an intermittent motion to the spindle and drill when

page_text: horing. This arm is provided with a joint O as shewn in Fig. 3, and by turning
the end T so as to be at right angles to the remainder of the arm and inserting
a metal peg P into holes which are arranged to come opposite to each other
when at right angles the lever M becomes an ordinary handle R capable of
giving continuous rotary motion to the spindle K which is useful when the work
Es light.
The upper portion of the drill stock N has an annular space cut out into which
two grooved rings are inserted having a number of small steel balls between the
said rings the lower end of the long collar bears on the upper ring as shewn in
Fection at S. Fig. 1.
This ball bearing considerably diminishes the friction and thereby prevents the
boring apparatus feeding itself and becoming locked.
The drill is fed when boring by screwing the collar H downwards against the
ball bearings of the drill stock N by means of the cross piece I.
Two other arrangements can be used for feeding the drill with this new form of
drill stand both of which are ordinary and in common use.
1st. Instead of a hollow collar H with male thread a similar solid threaded
part can be used provided with a handle or a cross piece similar to I. Fig. 1.
at its upper end to turn it and a countersunk recess at its lower end to
take the conical point of an ordinary ratchet brace. In this case the drill
is fed by screwing the solid threaded part against the ratchet brace in the ordinary
manner.
2nd. The bridge C of the drill stand instead of being bored and tapped can
have a countersunk recess made in the middle or centre of its under surface to
take the conical point of an ordinary ratchet brace having the ordinary feed
arrangement in itself.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is :-
1st. In a pipe boring mechanism the use of a frame or stand which is completely
integral and of the form and construction substantially as herein described and shewn
in Figs. 1 & 2 and for the purposes herein specified.
2nd. In a pipe boring mechanism such as herein described and shewn the use in
combination therewith of an actuating lever provided with a hinged joint by which
the lever can be converted into a handle substantially as herein described and for
the purposes berein set forth.
3rd. In a pipe boring mechanism such as herein described and shewn the use in
combination therewith of a ball bearing on the stock of the drill substantially as
herein set forth and for the purposes specified.
4th. The general arrangement construction and combination of parts of a pipe
boring mechanism substantially as herein shewn and described and for the purposes
herein set forth.
Dated this 25th day of Jul 1806
JOSEPH WILBY.