IMPROVEMENTS IN MACHINERY OR APPARATUS For DRILLING BORING OR CUTTING COAL ROCK IRON OR OTHER HARD SUBSTANCES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
I GEORGE FREDERICK WYNNE of Minera near Wrexham in the County of
Denbigh, Secretary to the Minera Mining Company Limited do hereby declare the
nature of my said invention for IMPROVEMENTS IN MACHINERY OR APPARATUS For
DRILLING BORING OR CUTTING COAL ROCK IRON OR OTHER HARD SUBSTANCES
to be as follows, that is to say :-
This Invention relates to a Novel Machine or Apparatus in one arrangement of
which specially designed for drilling Coal or Rock, I employ a long screw working
in a nut which latter runs on small Balls and a Brake upon the nut puts on an
automatic feed when the pressure upon the end of the drill goes below a certain
point. In another arrangement specially designed for drilling Iron or other Metals
in place of the ordinary Ratchett, the handle which turns the drill is brought
outside the stand to which the Machine is fixed by which means the handle can be
turned round for the whole revolution instead of swinging in a small are only as in
the ordinary Ratchett arrangement.--In carrying out my Invention, in the first
arrangement I employ a long Male Screw to one end of which is fixed the Cranked
handle and to the other. the Auger or Drill.
This Screw works in a round nut which may be split in two halves and is fitted
into a short piece of tube of about the same length as the nut to keep the two
halves together. This tube again is fitted into a small Cylindrical Chamber which
latter is fixed by a Bolt to the Bar or Stand in the ordinary way.-At the end of
the Cylindrical Chamber which receives the thrust when the Drill is working are
placed a number of Steel Balls which revolve between the end of the before
inentioned Cylindrical Chamber and a steel ring or washer on which washer the
end of the nut presses when the drill is in operation.-On the outside of the
Cylindrical Chamber is cast a Boss in which is fitted a screw which presses through
a strong Spiral Spring, a filling piece against the periphery of the short piece of
Tube before mentioned.
In a machine constructed according to my invention if the point of the Auger or
drill be pressed against the Coal, Rock or other substance to be bored the pressure
will be thrown back upon the nut and upon turning the handle the nut will run
round on the before mentioned small Balls with the Bolt so that there will be no
feed whatever.

page_text: If however the Set Screw in the Boss be screwed down so as to bring a pressure
upon the periphery of the short piece of tube before mentioned, and as the nut
cannot turn round without it, the nut will be kept from revolving until the
pressure upon the point of the Auger and consequent friction upon the threads of
the Screw and nut over come the resistance of this Brake and the nut again
revolves.
In the second arrangement for drilling Iron or other hard substance it is not
necessary to have the nut in two halves and the before mentioned short piece of
Tube may be dispensed with the only object of these being to enable the operator
instead of turning the handle round to bring the tool back to slide the Bolt and,
nut back together after removing the end of the Cylindrical Chamber and put the
two halves together further up the feed screw thus saving time.-The filling piece
spring and set screw before mentioned are dispensed with in the second arrangement
and the automatic feed is produced by a special contrivance as follows:-
One end of the feed nut has teeth formed in the periphery of same, a pawl
engages in these teeth and prevents the nut from rotating unless the before
mentioned pawl is lifted up by an adjustable Cam which keyed on to the feed
screw by a sliding key, the amount of feed being regulated by the portion of the
revolution during which the pawl is allowed to engage in the teeth upon the
before mentioned nut.
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page_text: I GEORGE FREDERICK WYNNE of Minera near Wrexham in the county of
Denbigh Secretary to the Minera Mining Company Limited do hereby declare the
nature of my said Invention for IMPROVEMENTS IN MACHINERY OR APPARATUS
FOR DRILLING BORING OR CUTTING COAL ROCK IRON OR OTHER HARD SUBSTANCES
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 a Novel Machine or apparatus in which I employ
a long Screw working in a nut which latter runs on Balls and a brake upon the
nut puts on an automatic feed when the pressure upon the end of the drill goes
below a certain point.
In another arrangement specially designed for drilling Iron or other Metals in
place of the ordinary Ratchett the handle which turns the drill is brought outside
the stand to which the Machine is fixed by which means the handle can be turned
round for the whole revolution instead of swinging in a small are only as in the
ordinary Ratchett arrangement.
In carrying out my Invention in the first arrangement I employ a long Male
Screw to one end of which is fixed the cranked handle and to the other the Auger
or Drill.
This Screw works in a round nut (which may be split in two halves) and fitted
into a short piece of tube of about the same length as the nut, to keep the two
halves together.
'
.
The nut works in a Cylindrical Chamber which latter is fixed by a Bolt to the
Bar or Stand in the ordinary way. At each end of the Cylindrical Chamber
which receives the thrust when the Drill is working; are placed a number of Steel
Balls which revolve between Steel rings and the ends of the nut.
On the outside of the Cylindrical Chamber is cast a Boss on which is fitted
a Screw which presses through a strong spiral spring a filling piece against the
periphery of the nut.
The portion of the nut which the pawl presses against may be either eccentric.
or formed into a cam.
In a machine constructed according to my invention if the point of the Auger
or Drill be pressed against the Coal, Rock or other hard substance to be bored the
pressure will be thrown back upon the nut and upon turning the handle the nut
will run round on the before mentioned small Balls with the Bolt so that there will
be no feed whatever.
If however the Set Screw on the Boss be screwed down a pressure will be
brought to bear upon the pawl and when the higher part of the eccentric formed
on the nut comes in contact with this pawl the pressure will be communicated to
the periphery of the before mentioned nut.
The nut will thus be kept from revolving until the pressure upon the point of
the Auger and consequent friction upon the threads of the Screw and nut overcome
the resistance of this Brake and the eccentric lifts up the pawl over the highest
point of the eccentric. The filling piece spring and set screw before mentioned are
dispensed with in the second.arrangement and the automatic feed is produced by
a special contrivance as follows:-
One end of the feed nut has teeth formed in the periphery of same, a pawl
engages in these teeth and. prevents the nut from rotating unless the before
mentioned pawl is lifted up by an adjustable Cam which is keyed on to the feed
Screw. by a sliding key....

page_text: The amount of feed being regulated by the portion of the revolution during
which the pawl is allowed to engage in the teeth upon the before mentioned nut.
But to make my Invention better understood I will proceed to describe the same
by reference to the accompanying drawings in which Figure 1 is a Longitudinal
Section of a Rock Drilling or Boring Machine constructed according to my invention
and Figure 2 a Transverse Section of same on line X Y of Figure 1.-Figure 3 is
a longitudinal Section of an apparatus specially designed for drilling Metals and
Figure 4 a Transverse Section of same through line Y Z.
'
Referring to figures 1 & 2.-A is a long screw to one end of which is fixed the
handle K and to the other the Auger or Drill L.
This screw works in a round nut B which may be split in two halves and fitted
into a short piece of Tube to keep the two halves together.-It is however not so
shewn in the drawings it being found simpler to make it solid as described in the
Second arrangement in the provisional specification.
The nut B works in a Cylindrical Chamber E which latter is fixed by a bolt to
the Bar or Stand J in the ordinary way.
At each end of the Cylindrical Chamber are placed a number of Steel Balls C
which revolve between the Steel Rings D D and the ends of the nut B.-On the
outside of the Cylindrical Chamber is placed a Boss in which is a screw which
presses through a strong spiral spring G a filling piece or pawl F against the
periphery of the nut B.
The portion of the nut B which the pawl F presses against may be either
eccentric as shown at B in figure 2 or be formed into a cam.
The action is as follows. If the point of the Auger or Drill L be pressed against
the Coal or other substance to be bored the pressure will be thrown back upon the
nut B and upon turning the handle the nut will turn round with the Bolt; on the
Balls C so that there will be no feed whatever.
If however the Cap H be screwed down a pressure will be brought to bear upon
the pawl F and when the higher part of the eccentric formed on the nut comes in
contact with this pawl as shown in Figure 2 the pressure will be communicated to
the periphery of the before mentioned nut B.-The nut will thus be kept from
revolving until the pressure upon the point of the Auger L and consequent friction
upon the threads of the screw and nut overcome the resistance of this Brake and
the eccentric or cam lifts up the pawl over its highest point.
When the highest point of the eccentric or cam has passed from under the pawl
the brake upon the nut will be released until the pawl again arrests the revolution
of the nut by coming in contact with the higher part of the eccentric formed
thereon.
In order to save the time of removing the drill from the hole bored in order to
put in a longer one.-The balls C. C. C'. C' are placed at each end of the nut and
each end of the feed screw has an exactly similar square formed upon it so that the
handle K and tool holder N are interchangeable.
When the hole is bored as deep as the Screw will allow, it is obvious that the
end of the screw projecting through the nut towards the face of Coal &c will be
long whereas that projecting through the other end will be short.-When therefore
it is necessary to change a drill the screw must be withdrawn some 2 or 3 inches
so as to allow of the drill and socket being removed from the screw.
The Bolt M securing the machine to the clipper I must then be slackened and
the screw nut &c be swung round so that the short end of the screw is presented
to the face, a large drill can then be attached to the screw and the handle to the
long end of same.
The pressure then will be thrown onto the Balls C¹. C².
Referring to Figures 3 & 4.-The automatic feed is produced by a different.
arrangement as follows:-
One end of the nut B has teeth C formed in the periphery of same and a pawl F
engages in these teeth and prevents the nut from rotating unless the before
mentioned pawl is lifted up by an adjustable cam D. D¹ which is keyed on to the

page_text: feed screw A. by a sliding key G the amount of feed being regulated by the portion
of the revolution during which the pawl is allowed to engage in the teeth of the
before mentioned nut.-When the pawl is in the position shewn in Figures 3 & 4
it is engaging in the teeth of nut but when the cam D D¹ as shewn in Figure 4
moves round it will lift up the pawl F out of the teeth of the before mentioned
Ratchett.
The length of the depression N shewn in the Cam D is adjustable by moving
the cam D¹ round a certain distance on cam D and then locking it with the nut H.
Having now particularly described & ascertained the nature of iny said
Invention, and in what manner the same is to be performed.-I would have it
understood that I do not confine myself to the precise details herein laid down and
shewn in the Drawing, as the same may be varied without departing from the
peculiar character of my Invention, but I declare that what I claim is :-
Firstly. The construction and employment of a Drill or Perforator in which
a screw works in a nut which latter runs on Balls and in which an intermittent
pressure is brought to bear upon the end of the Auger or Drill by the arrangement
described and illustrated herein thus saving the friction which would be produced
if the Brake pressure were kept on the nut during the whole of the revolution.
Secondly. The combination of a nut working on Balls placed at both ends
of the nut and an interchangeable handle and Drill by which the necessity of
unscrewing the Screw out of the nut is avoided.
Thirdly. The arrangement for producing an automatic feed shown in Figures
3 & 4.
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