Improvements in the Feed Motion of Drills or Boring Machines for Coal and the like.
Year: 1892

page_text: Date of Application, 17th Nov., 1892
Complete Specification Left, 17th Aug., 1893-Accepted, 7th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in the Feed Motion of Drills or Boring Machines for
Coal and the like.
I, William George Liversidge, trading as Roper Son & Co., of Broad
Street, Sheffield, in the County of York, Manufacturer, do hereby declare the
nature of my invention to be as follows:-
:―
This invention has for its object to facilitate the adjustment of the feed screw of
boring machines for rock, coal and the like; this object I accomplish by making
the nut in which the long feed screw works, in two parts or halves that can be
drawn apart and so release the screw, enabling it to be moved instantly from one
end to the other.
I enlarge the bottom end of the tube in which the screw works, and from a
transverse opening on each side to receive a divided nut of square shape.
A hoop of elongated form is passed round the enlarged bottom end of tube, and
is secured to the back of one half of the die or nut, and a thumb screw is passed
through the opposite end of the hoop, by which the dies or half nuts may be
screwed together, so as to form a solid nut.
When it is desired to alter the position of screw, the parts of nut are drawn
apart releasing the screw and enabling it to be moved in any desired position.
As a modification in construction, I continue to use the divided nut before
described, supported in a swivelling head which is arranged so that it can be turned
round in the adjustable slide of the boring machine to any desired angle.
The swivelling head is prepared with a hole to allow the feed screw to be passed
through it, and between the parts of the divided nut, and on the outside it
grooved to receive an adjusting plate both ends of, which are turned down and pass
over the ends of the parts of the divided nut so. as to prevent their escape, but
giving sufficient room for opening and closing same.
A screw is passed through each returned end of the adjusting plate one screwing
into one half of the nut, and the other screw bears against the opposite half of the
nut, by which means the nut may be opened to release the screw, or be closed upon
the screw when the tool is being used.
ני.
1
1000
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in the Feed Motion of Drills or Boring Machines for
Coal and the like.
J, WILLIAM GEORGE LIVERSIDGE, trading as Roper Son & Co., of Broad
Street, Sheffield in the County- of York, Manufacturer, 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 :-
My invention has for its object to facilitate the adjustment of the feed screw of
boring machines for rock, coal, and the like, and I accomplish this broadly speaking
by making the nut in which the long feed screw works, in two parts or halves that
can by my special arrangements be readily drawn apart so as to release the screw,
enabling it to be moved instantly from one end to the other or to any desired
intermediate distance.

page_text: I have illustrated my invention in the annexed sheet of drawings-in which:
Fig. 1, is a side view of the nut box through which the feed screw passes.
Fig. 2, front view of same..
Fig. 3, side view of same.
Fig. 4, side view of nut box of modified construction.
Fig. 5, end view, partly in section.
I construct the nut box A, with a transverse opening B, to receive the two parts
of a divided nut C, C', and a central clearance opening D, for the screw to pass
through, and engage with the screw threads of the nut.
A hoop or clip E, is let into a recess on the face of the nut box, and secured by
a screw F, but so as to allow of a side motion in either direction for which purpose
a slot G, is provided. One of the returned ends E', of the clip E, (which I prefer
to a hoop) is screwed fast to the outer end of the half nut C, and the other
returned end E², is provided with a thumb screw H, the end of which acts against
the half nut C¹. The action of the screw H, is to draw the two parts of the nut
towards each other, and cause them to engage with the threads of the screw.
When during use it is desired to alter the position of the screw, such for example
to draw it back so as to substitute a different drill, the divided nut is released by
turning the thumbscrew H, which at once releases the screw, and when replaced in
the desired position, a few turns of the screw causes the threads of the nut to
engage with those of the screw.
Figs. 4 and 5 show a modification in the constructive detail of such a nut box as
before described.
The half parts of the divided nut are provided with projecting lugs J and J',
which project through openings K, made in the side of the box A, the lug J, being
tapped with a screw thread, and the lug J', being bored with a plain hole. Through
these lugs a thumbscrew L, is passed, and is secured in the lug J' between a
collar M, and the head of the screw. The travel of the two parts of the nut is
fixed by the screws N, and the length of the grooves O, in which the ends of the
screws engage.
The action of the apparatus is the same in both cases; the operation of the screw
either releases or secures the screw, or screwed spindle.
Having thus particularly described and ascertained the nature of my inven-
tion, and in what manner the same may be put into practice I declare that what I
claim is :--
1. In the feed motion of machines for boring coal and the like, a divided-nut box,
with releasing action, constructed substantially as hereinbefore described and shown
in Figs. 1. 2. 3 of the drawings.
2. A divided-nut box for coal boring machines in which the nuts are provided
with lugs, J and J', engaging with a screw L, substantially as hereinbefore
described and as shown in Figs. 4 and 5 of the drawings.
Dated the 15th dow of Aroust 1902
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.