IMPROVEMENTS IN SLATE-WORKING MACHINERY
Year: 1875

page_text: LETTERS PATENT to Jeffreys Parry de Winton, of the Union Iron
Works, Carnarvon, in the County of Carnarvon, Engineer, for the
Invention of "IMPROVEMENTS IN SLATE-WORKING MACHINERY."
•
PROVISIONAL SPECIFICATION left by the said Jeffreys Parry de
Winton at the Office of the Commissioners of Patents, with his
Petition, on the 5th October 1875.
I, JEFFREYS PARRY DE WINTON, of the Union Iron Works, Car-
narvon, in the County of Carnarvon, Engineer, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN SLATE-WORKING
MACHINERY," to be as follows:-
My Invention consists of an improved method of giving motion to
the tables or tools of slate planing, sawing, or other slate-working
machines.
Instead of giving motion to these tables or tools by chains, ratchets,
worm wheels, or other such usual methods, some or none of which
as usually applied are capable of giving a steady and regular, or
if required variable amount of feed, according to the thickness of
slate to bo cut for sawing, depth of out for planing, or other working,

page_text: I according to this Invention give motion to the said tables or tools
by hydraulic pressure by attaching to the frames or beds of the machines
one or more hydraulic cylinders, having pistons or rams connected
directly or indirectly with the travelling tables or tools of the machines.
And for the purpose of giving the requisite backward and forward
motion to the pistons or rams (and through them to the tables or tools)
and for controlling the speed of them I direct and regulate the hydraulic
power by a slide or other regulating valve, so constructed that the
bydraulic pressure can be directed to either end of the piston or ram as
requisite, thus giving a regular and steady travel to the tool or table
either way. And I give a variable speed of travel to the tables or tools
according to the amount of resistance to be overcome, cither by
decreasing or increasing (as the case may be) the hydraulic pressure
on the front or pressure side of the piston or rams, or by preference by
decreasing or increasing the rate of eduction on the back or exhaust
side of the piston or rams.
The valve box or apparatus which I prefer to use for regulating and
controlling the amount of pressure and exhaust is made with passages
communicating with cither end of the cylinder, and provided with an
ordinary slide valve communicating with the said passages, and from
them to the exhaust passage, which slide valve is reversed either by
hand or automatically by the alternate backward and forward motion
of the table. The valve box has a wheel or other valve opening or
closing the eduction passage, and it also has a supplementary eduction
regulating screw valve, being made with a conical point working into :
a suitable seat or other arrangement allowing of an exact adjustment of
the rate of eduction. Both the said valves open to the lower eduction
passage.
To work the machine the hydraulic pressure is first turned on to the
front or back side of the piston or ram as required by shifting the slide,
then the large eduction valve is opened allowing the table to commence
its travel at a quick speed, and a slow or feeding speed is obtained by
screwing down the said valve and opening the small or regulating valvo
to such an exɩent as will give the exact speed required.
When the piston gets to the end of its stroke the motion is reversed
by putting over the slide valve by hand or automatically by the table,
a quick return motion being made by opening the large eduction valve,
and so on.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Jeffreys Parry de Winton in the Great Seal Patent
Office on the 4th April 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JEFFREYS
PARRY DE WINTON, of the Union Iron Works, Carnarvon, in the County
of Carnarvon, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifth day of October, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Jeffreys Parry de Winton,
Her special licence that I, the said Jeffreys Parry de Winton, my
executors, administrators, and assigns, or such others as I, the said
Jeffreys Parry de Winton, my executors, administrators, and assigns,
should at any time agree with, and no others, from time to time
and at all times thereafter during the term therein expressed, should and
lawfully might make, use, exercise, and vend, within the United King-
dom of Great Britain and Ireland, the Channel Islands, and Isle of
Man, an Invention for "IMPROVEMENTS IN SLATE-WORKING MACHINERY,"
upon the condition (amongst others) that I, the said Jeffreys Parry
de Winton, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed
in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Jeffreys Parry de Winton, do
hereby declare the nature of my said Invention, and in what manner
the same is to be performed, to be particularly described and ascer-
tained in and by the following statement, reference being had to the
accompanying Drawings, and to the letters of reference marked thereon,
that is to say:-

page_text: Instead of giving motion to these tables or tools by chains, ratchets,
worm wheels, or other such usual methods, many or all of which
as usually applied are incapable of giving a steady and regular, or if
required variable amount of feed, according to the thickness or toughness
of slate to be cut or sawed, depth of cut for planing, or other working,
I according to my Invention give motion to the said tables or tools
by hydraulic pressure by attaching to the frames or beds of the machine
one or more hydraulic cylinders, having pistons or rams connected
directly or indirectly with the travelling tables or tools of the machines.
And for the purpose of giving the requisito backward and forward
motion to the pistons or rams (and through them to the tables or tools)
and for controlling the speed of them I direct and regulate the hydraulic
power by a slide or other regulating valve, so constructed that the
hydraulic pressure can be directed to either end of the piston or ram as
requisite, thus giving a regular and steady travel to the tool or table
either way. And I give a variable speed of travel to the tables or tools
according to the amount of resistance to be overcome, either by
decreasing or increasing (as the case may be) the hydraulic pressure
on the front or pressure side of the piston or rams, or by preference by
decreasing or increasing the rate of eduction on the back or exhaust
side of the piston or rams.
Figures 1, 2, and 3 of the accompanying Drawings illustrates how
my Invention may be applied to slate-sawing machines.
A is the framing of the machine; B, the saw spindle; and C, the
travelling table; D is the hydraulic cylinder fixed to the framing A,
the piston rod or ram E of which is connected directly or indirectly to
the travelling table O; F is the valve, which directs and controls the
hydraulic pressure to either end of the cylinder D through the pipes H
and I, being itself connected with the hydraulic head or pressure by the
pipes G.
The valve box or apparatus which I prefer to use for regulating and
controlling the amount of pressure and exhaust is shown at Figures 4,
5,6, and 7. H and I are the passages communicating with either end of
the cylinder, K being the eduction passage; L is an ordinary slide
valve communicating with the said passages H and I, and from them
to the cxhaust passage K, which slide valve is reversed either by hand
or automatically by the alternate backward and forward motion of the
table; N is the wheel or other valve opening or closing the eduction

page_text: passage, and P is a supplementary eduction regulating screw valve,
being made with a long conical point working into a suitable seat or
other arrangement allowing of an exact adjustment of the rate of
eduction. Both the said valves M and N open to the lower eduction
passage R.
To work the machine the hydraulic pressure is first turned on to the
front or back side of the piston or ram as required by shifting the slide L,
then the eduction valve N is opened allowing the table to commence
its travel at a quick speed, and a slow or feeding speed is obtained by
screwing down the valve N and opening the regulating valve screw P
to such an extent as will give the exact speed required.
When the piston gets to the end of its stroke the motion is reversed
by putting over the slide valve K by hand or automatically by the table,
a quick return motion being made by opening the large eduction valve N,
and so on "ad infinitum."
Having now described the nature of my said Invention and in what
manner the same is to be performed, I declare that I claim,—
First. Working the tables or tools of slate-working machinery
directly or indirectly by hydraulic pressure, and substantially as
described and illustrated in the accompanying Drawings.
Second. The construction and employment of hydraulio apparatus in
connection with slate-working machinery, the hydraulic pressure on the
pistons or rams being admitted and regulated by valve apparatus fitted
with slide or other admission valve, and with large and small eduction
valve for varying the speed, all substantially as herein-before described
and illustrated in the accompanying Drawings.
In witness whereof, I, the said Jeffreys Parry de Winton, have
hereunto set my hand and seal, this First day of April, in the
year of our Lord One thousand eight hundred and seventy-six.
.