Improvements in the Construction of Rock Drilling or Boring Machines or Apparatus.
Year: 1895

page_text: Date of Application, 1st Mar., 1895
Complete Specification Left, 29th Nov., 1895-Accepted, 29th Feb., 1898
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PROVISIONAL SPECIFICATION.
Improvements in the Construction of Rock Drilling or Boring
Machines or Apparatus.
GEORGE FREDERICK WYNNE Plasgwyu, Minera near Wrexham Mechanical
Engineer do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in the construction of rock drilling or
boring inachines or apparatus. The improvements consisting 1stly in the special
design and construction of the combined gland and induction port. 2ndly in a
novel and improved arrangement for taking up the wear in the feed nuts. 3rdly in
an improved design and arrangement for taking up the wear in the slide or saddle
aud fourthly in an improved oiling arrangement.
The general form of the combined gland and induction port is somewhat similar
to that described and illustrated in my Patent No. 903 of 1882 and the
improvement cousists in dividing this combined gland and induction port
longitudinally in such a way that the metallic rings to keep same air tight may be
easily inserted and that the drill socket which with the ordinary form of gland
must necessarily be a loose collar fixed to the piston rod may in this case consist
of a solid forging forming part of the piston rod itself. The metallic rings are of
cast iron or other suitable metal and are cut into threo equal parts and held
together around the piston rod by rings of india rubber or by springs or other
suitable device for pressing them inwards against the said piston rod. These cast
iron rings fit into suitable grooves in the combined glaud and induction port and
when the two halves of same are brought together they are firmly and securely
enclosed in their respective grooves. In the second arraugement for taking up the
wear in the feed nuts I employ two nuts inserted from opposite ends of the bottom
slide of the cylinder the flanges of these nuts bedding upon each end of the slide.
Two bolts fix these nuts firmly in position and each of them passes through both
flanges and also through the full length of the slide. Under the flange of one of
the nuts are placed washers of graduated thicknesses or a single washer of any
suitable material the thickness being adjusted so that the thread of the bolt fits
acourately in both the nuts.
When any wear has taken place in the nuts a washer or washers of greater or
less thickness is inserted under the flange the result being that the two nuts are
either separated or drawn more closely together, the threads of one nut bearing
against one side of the thread of the bolt and the threads of the other unt against
the other side of these threads.
In the third arrangement for taking up the wear in the slide or saddlo I
preferably employ a saddle of double V section upon which the slide of the cylinder
bears.
Instead however of making the saddle of oue casting I have a moveable strip of
metal which forms the upper side of one of the V's and fix this strip to the other
part of the saddle by suitable bolta. Between this strip and the other part of the
saddle I insert a piece of packing (preferably employing wood or vulcanized fible)
of such thickness as may be necessary to ensure a good sliding fit. When through
the working of the drill the slide of cylinder becomes too loose a fit in this saddle
it may be easily tightened again by removing the strip of packing reducing its
thickness and re-inserting it between the two parts of the saddle.

page_text: In the fourth arrangement for oiling the drill I insert (preferably in the induction
port of the drill) a small valve of special construction.
This valve consists of a spindle bored centrally and fitting into a slide screwed
into the drill.
To the bottom of this spindle is attached the valve which with the seating on
which it bears is in the induction port itself. The valve is so constructed that
when there is no pressure in the induction port the valve automatically opens and
oil may then be poured down the central bole in the spindle into the induction port
but when the compressed air or other motive fluid is admitted into the induction
port the pressure shuts the valve against its seating and prevents the escape of
the oil except through the cylinder itself which it effectually lubricates.
An alternative plan for taking up the wear in the slide is as follows:-The
saddle is made in the ordinary way but between the slide of the cylinder and the
saddle a space is left into which is fitted a long strip of metal of taper cross
section. This strip of metal is adjustable and being taper in cross section the
wear in the saddle may be taken up by moving it in such a manuer that the thick
part of the strip is moved in the direction of the narrowest part of the before
mentioned space.
When this adjusting strip is moved to the required position it may be fixed there
by a bolt passing through a slot in both the strip and the saddle or in any other
suitable manner.
Dated this Twenty-eighth day of February 1895.
Improvements in the Construction of Rock Drilling or Boring
Machines or Apparatus.
GEORGE FREDERICK WYNNE Plasgwyn Minera near Wrexham, Mechanical
Engineer, 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 relates to improvements in the construction of rock drilling or
boring machines or apparatus. The improvements consisting, Firstly-In the
special design and construction of the combined gland and induction port.
Secondly-In a novel and improved arrangement for taking up the wear in the
feed nuts. Thirdly :-In an improved design and arrangement for taking up the
wear in the slide or saddle and Fourthly:-In an improved oiling arrangement.
The general form of the combined gland and induction port is somewhat similar
to that described and illustrated in my Patent No. 903 of 1882. And the improve
mente consist in dividing this combined gland and induction port longitudinally in
such a way that the metallic rings to keep same air tight may be easily inserted
and that the drill socket which with the ordinary form of gland must necessarily
be a loose collar fixed to the piston rod may in this case consist of a solid forging
forming part of the piston rod itself.
Referring to the drawing the metallic rings A are of cast iron or other suitable
metal and are cut into three equal parts and held together around the piston rod B
by rings of india rubber C or by springs or other suitable device for pressing them
inwards against the said piston rod. These cast iron rings fit into suitable grooves
in the combined gland and induction port W, and when the two halves of same are
brought together and bolted by the bolts D the rings are firmly and securely
enclosed in their respective grooves.
In the second nrrangement for taking up the wear in the feed nuts I employ two

page_text: nuts E inserted from opposite ends of the bottom slide F of the cylinder G, the
flanges of these nuts bedding upon each end of the slide.
Two bolts H fix these nuts firmly in position and each of them passes through
both flanges and also through the full length of the slide.
Under the flanges of one of the nuts are placed washers I of graduated
thicknesses or a single washer of any suitable material the thickness being adjusted
so that the thread of the bolt J fits accurately in both the nuts.
When any wear has taken place in the, nuts a washer or washers of greater or
Jess thickness is inserted under the flange the result being that the two nuts are
either separated or drawn more. closely together, the threads of one nut bearing
against one side of the thread of the bolt and the threads of the other nut against
the other side of the same threads.
In the third arrangement for taking up the wear in the slide or saddle I employ
a saddle K of double V or other suitable section.
Instead however of making the saddle of one casting I have a moveable strip or
strips L of metal which forms the upper side or sides of one of these V's and I fix
this strip to the other part of the saddle by suitable bolts.
Between this strip and the other part of the saddle I insert a piece of packing M
(preferably employing wood or vulcanized fibre) of such thickness as may be
necessary to ensure a good sliding fit.
When through the working of the drill the slide of cylinder becomes too loose a
fit in this saddle it may be easily tightened again by removing the strip of packing
reducing its thickness and re-inserting it between the two parts of the saddle.
In the fourth arrangement for oiling the drill I insert (preferably in the induction
port of the drill) a small valve of special construction.
This valve consists of a spindle N bored centrally and fitting into a slide o
screwed into the drill at P.
To the bottom of this spindle is attached the valve Q which with the seating R
on which it bears is in the induction port itself.
The valve is so constructed that when there is no pressure in the induction port
the valve automatically opens and oil may then be poured down the central hole S
in the spindle into the induotion port but when the compressed air or other motive
fluid is admitted into the induction port the pressure shuts the valve against its
seating and prevents the escape of the oil except through the cylinder itself which
it effectually lubricates.
An alternative plan for taking up the wear in the slide is as follows:-
The saddle K Fig. 4 is made in the ordinary way but between the slide of the
cylinder and the saddle a space is left into which is fitted a long strip of metal of
taper cross section T.
This strip of metal is adjustable and being taper in cross section the wear in the
saddle may be taken up by moving it in such a manner that the thick part of the
strip is moved in the direction of the narrowest part of the before mentioned
space.
When this adjusting strip is moved to the required position it may be fixed
there by bolts U passing through slots V in both the strip and the saddle or in
any other suitable manner.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :-
1. A combined gland and induction port split longitudinally in two halves so as
to admit of the easy insertion of the metallic rings for keeping the gland air tight
and to enable the drill socket to be made in one forging with the piston and piston
rod substantially as described.
2. An arrangement for taking up the wear in the feed nuts consisting of two
outs inserted from opposite ends of the bottom slide of the cylinder combined with
an adjustable washer or washers under the flange of one of the nuts together with

page_text: bolts or other equivalent device for drawing the nuts together, the wear being
taken up by increasing or reducing the thickness of the washers substantially as
described.
3. The employment of an adjustable strip of any suitable material between the
sides of the slide or saddle in such a manner that the wear can be taken up by
reducing the thickness of this strip substantially as described.
4. The alternative plan of taking up the wear in the slide consisting of a strip
of metal of taper cross section fitting into a similar shaped recess between the
slide of cylinder and the saddle the adjustment of this strip taking up any wear
substantially as described.
5. The arrangement for oiling the drill through the spindle of an automatically
closing valve substantially as described.
T
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