Improvements relating to Miners' Boring Apparatus.
Year: 1893

page_text: Date of Application, 9th Feb., 1893
Concification Left 9th Nov., 1893-Accepted, 9th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements relating to Miners' Boring Apparatus.
I, FRANK SCOTT of Cornish Street, Sheffield, in the County of York,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
This invention is for improvements relating to the construction of miners boring
apparatus and more particularly to two parts of same namely the extension slide,
and the nut through which the boring spindle works.
The objects aimed at are rapidity of adjustment and simplicity of construction.
I propose to construct the extension slide of a flat or T bar of iron or steel
with notches formed down one or both of its edges, and having a hoop or clip
secured upon its top end provided with an oblong opening through which the bar
forming one side of the body of apparatus slides.
At the bottom of side bar I fix another hoop or clip which is provided with an
opening through which the slide bar passes, both bars being side by side. The
opening in last named hoop or clip through which the slide bar moves, is open at
the side of the bar which is notched and carries a catch which engages with the
said notches when they are opposite to it, and thus retains the parts in the position
to which they may be extended.
The improvement in the nut and its holder, is for rapidity of withdrawal and
readjustment of the drill spindle or main screw.
This has constantly to be drawn back a few inches and in ordinary cases to
accomplish this the screw would have to be turned round a many times causing a
considerable loss of time, to avoid this I propose to make the nut through which
the screw works, capable of sliding the required distance inside the holder or nut
carriage which is supported between the sides of the body of the apparatus or
trunnions in the usual way.
The holder has a longitudinal groove in which the nut engages to prevent
turning, and stops are provided near each end to limit its travel, a centre screw at
the top with quick thread enables the nut to be fixed at each end of its travel,
and by a turn or two of this screw the nut is released and the spindle with the nut
can be instantly pushed back the required distance.
the 7th dox of February 1893.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements relating to Miners' Boring Apparatus.
I, FRANK SCOTT of Cornish 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 :-.
This invention is for improvements relating to the construction of miners boring
apparatus and more particularly to two parts of same namely the extension slide,
and the nut through which the boring spindle works.
The objects of my invention are rapidity of adjustment, and simplicity of con-
struction, and the parts of a boring machine to which the invention refer are
illustrated in the sheet of drawings annexed hereto.
Fig. 1, is a vertical section of the nut and its holder, for the rapid movement of
the drill spindle.
T
1
Imame in its complete state.

page_text: Fig. 3, plan of clip and catch, with the two bars in section.
Fig. 4, elevation of a boring machine.
Fig. 5, portion of square bar of single standard machine.
The first part of my invention relates to the extension slide and its adjuncts.
I construct the extension slide A, of iron or steel having notches B, formed
down one of its edges, and having a hoop or clip C, secured upon or made from its
top end, and being provided with an oblong opening through which the bar D,
forming one side of the body of the apparatus slides see Fig. 3.
At the bottom of the side bar D, I fix another hoop or clip E, which is provided
with an opening through which the slide bar A, passes, both bars A and D, being
side by side.
This last named opening in the clip through which the slide bar A, moves, is
open on the notched side of the bar, and a catch F, is pivotted therein which
engages with the aforesaid notches in the edge of the bar when they come
opposite to it, and thus holds the bars in the position to which they may be
extended.
Where two catches are used, one for each side bar, they may be secured upon
one axis F2, so that both may be operated by one movement of the hand.
In a single standard machine, I make the bar G, square see Fig. 5, and to save
labour and files I form the notches H, in one of the edges; the slide is made to
fit upon the bar and is provided with a catch taking into the notches.
The second part of my invention relates to the nut J, of the drill spindle,
and refers to a method by which it may be rapidly moved and adjusted longi-
tudinally; this has constantly to be done, and in ordinary cases the screw K.
has to be turned round in the nut many revolutions causing considerable delay and
loss of time.
To avoid this I make the nut J, through which the screwthreaded spindle K,
(see Fig. 4,) works, capable of moving the required distance inside the holder
or nut carriage L, which is supported upon the trunnions M, between the
sides which form the body of the apparatus, the trunnions resting in the
notches N.
The holder L, has a longitudinal groove P, and the nut has a projection Q,
which slides therein to prevent turning or vice versa, and stops preferably in the
form of removable screw R, are placed near each end of the groove P, to
limit the travel of nut. A central screw S, at the top with a quick thread enables
the nut to be fixed at each end of its movement or travel, and by a turn of this
screw the nut is released and the spindle and nut can be instantly drawn back the
required distance.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is carried into practice I declare that what I
claim is:
1. In a boring machine for coal and the like, a nut holder L, having an internally
fitted nut J, capable of being moved longitudinally, and provided with means such
as the stop screws R, projection Q, and groove P, for limiting its amount of travel,
and also with means such as the screw S, for holding it.
2. In a coal boring machine such as shown in Fig. 4, the construction and
arrangement of the extension slide A, and body D, with the clips E, substantially
as hereinbefore described and illustrated in Figs. 3 and 4.
3. In a single standard machine, a square extension bar having the notches for
the catch made in the angle or edge of the bar and a catch made to engage with
same for the purpose specified and as shown in Fig. 5.
D1 0 1
Nombor 1902
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.