IMPROVEMENTS IN MACHINERY FOR DRESSING STONE
Year: 1875

page_text: LETTERS PATENT to William Young, of the Firm of J. and T. Young,
of the Vulcan Foundry, Ayr, in the County of Ayr, North Britain,
Engineers, for the Invention of "IMPROVEMENTS IN MACHINERY FOR
DRESSING STONE."
PROVISIONAL SPECIFICATION left by the said William Young at the
Office of the Commissioners of Patents, with his Petition, on the
22nd May 1875.
I, WILLIAM YOUNG, of the Firm of J. and T. Young, of the Vulcan
Foundry, Ayr, in the County of Ayr, North Britain, Engineers, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
MACHINERY FOR DRESSING STONE," to be as follows, that is to say:-
This Invention relates to stone-dressing machinery of the kind in
which two blocks of stone are made to act on each other by being fixed
on separate carriers, each of which is moved by parallel crank shafts, as
a coupling rod is by the cranks of coupled locomotive wheels.

page_text: The Invention consists in making the slide, saddle, or carriage on
which each stone is fixed adjustable transversely for the purpose of
putting the two stones in working contact, and of moving the stones
closer together as the dressing operation proceeds, instead of the stones
being adjusted as heretofore in a clumsy manner on their slides or
saddles, and being liable to get out of parallelism when readjusted in
consequence of their unevenness.
In a machine embodying the improvements there are two horizontal
crank shafts with two pairs of horizontal coupling rods or bars, a pair
for each stone or stone carrier. On each pair of bars there are fixed
two or more transverse bearers, and on these bearers rests the saddle or
slide on which one of the stone blocks is fixed. The saddle or slide is
movable on the bearers, and has projections or ribs formed' or fixed on
its under side to fit and work in guide slots in the tops of the bearers.
The transverse adjustment of the saddle or slide is effected by means
of screw spindles in the bearers, and acting on nut blocks attached
to the saddle or slide, the screw spindles being actuated simultaneously
by means of a longitudinal shaft geared to them by bevil wheels.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Young in the Great Seal Patent Office
on the 20th November 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
YOUNG, of the Firm of J. and T. Young, of the Vulcan Foundry, Ayr,
in the County of Ayr, North Britain, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-second day of May, in the
year of our Lord One thousand cight hundred and seventy-five, in
the thirty-eighth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said William Young, Her
special licence that I, tho said William Young, my executors, admini-
strators, and assigns, or such others as I, the said William Young, 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 Kingdom of Great Britain and

page_text: Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN MACHINERY FOR DRESSING STONE," upon the condition
(amongst others) that I, the said William Young, 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 William Young, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement in writing, reference being had to the accompanying
Drawings, that is to say :-
My said Invention relates to stone-dressing machinery of the kind in
which two blocks of stone are made to act on each other by being fixed
on separate carriers, each of which is moved by parallel crank shafts, as
a coupling rod is by the cranks of coupled locomotive wheels. One
modification of machinery of the kind referred to is described in the
Specification of Letters Patent granted to William Adams, and dated
22 February 1870 (No. 518).
My present Invention consists in providing a slide, saddle, or carriage,
on which each stone is fixed, and which is adjusted transversely for the
purpose of putting the two stones in working contact, and of moving
the stones closer together as the dressing operation proceeds, instead of
the stones being adjusted, as heretofore, in a clumsy manner on their
carrying tables, and being liable to get out of parallelism when re-
adjusted in consequence of their unevenness.
And in order that my said Invention' and the manner of performing
O the same may be properly understood, I hereunto append a Sheet of
explanatory Drawings to be herein-after referred to, and representing
a self-grinding stone-dressing machine as made with my improvements.
In these Drawings the same reference numerals are used to mark the
same or like parts wherever they are repeated.
5 Figures 1 and 2 of the Drawings are side and end elevations; Figure 3
is a plan : and Figure 4 is a transverse vertical section.

page_text: The various parts of the machine are carried upon a single open-
framed sole plate 5 of cast iron, which maintains their proper positions
relatively to each other. Two parallel horizontal crank shafts 6, 7, are
carried one at each end of the sole plate, and each in three bearings 8,
and these shafts are driven by bevil wheels 9, 10, fast on them, and in
gear with bevil pinions 11, 12, on a longitudinal shaft 13, which last
may be driven by a special engine or in any convenient way. Each
crank shaft 6, 7, is formed with two long crank journals 14, 15, placed
diametrically opposite to each other, and with those of one shaft parallel
to those of the other at each side of the bed plate. On the two similarly
placed crank journals 14 there are jointed a pair of horizontal coupling
rods or bars 16, and a similar pair of bars 17 are jointed on the other
two crank journals 15. On each pair of coupling bars 16, 17, there are
fixed two (or it might be more) transverse bearers 18, and on these
bearers rests the horizontal saddle or slide 19, on which one of the stone
blocks 20 is fixed. Each saddle or slide 19 is a strong cast-iron plate
formed with numerous holes for the fixing and adjusting of the stone
block, and is movable on the bearers 18 to or from the longitudinal
centre line of the machine, there being projections or ribs formed or
fixed on its under side to fit and work in guide slots in the bearers 18.
Each bearer 18 is a casting with two sides united at the inner and outer
ends, and has a screw spindle 21 placed between the two sides and
lapped through a nut block fixed to the saddle or slide 19. The screw
spindles 21 have bevil wheels 22 fast on their outer ends, and the two at
each side of the machine are in gear with bevil pinions 23 on a shaft 24
carried by brackets attached to the bearers 18. A hand wheel 25 on
each shaft 24 serves for acting on the two screw spindles 21 simul-
taneously, so as to move the slide 19 in or out whilst keeping it parallel.
On each adjustable saddle or slide 19 there are fitted two brackets 26,
cast in the same piece with or attached to a vertical backing plato 27,
which is formed with a number of holes for holding and adjusting screws
or bolts 28, and these brackets 26 are movable inwards and outwards in
guide grooves on the horizontal plate or saddle 19 by screw spindles 29,
turned by bevil wheels on a horizontal shaft 30 having on it one or more
hand wheels 31

page_text: blocks 20 are gradually moved closer together by means of the screw
spindles 21 acting on the saddles 19, which carry forward the blocks
without in the least affecting the adjustment on their supports, the
brackets 26 and backing plates 27 being also carried by and moving
with the saddles 19, and rigidly maintaining the positions of the stone
blocks.
Having thus particularly described my said Invention and the manner
of performing the same, I have to state that I do not restrict myself to
the precise details herein described or delineated, but that what I believe
to be novel and original, and claim as the Invention secured to me by
the herein-before in part recited Letters Patent is,-
1. The constructing and arranging of the slide, saddle, or carriage (19)
on which the stone block (20) is set so that it can be adjusted inwards
or outwards on the bearers 18, substantially in the manner and for the
purposes herein-before described.
2. The providing of screws (21) for moving the slides or tables (19)
inwards or outwards, such screws (21) being distinct from and additional
to the screws (29) for moving the brackets (26) on the slides or tables
(19), as herein-before described.
In witness whereof, I, the said William Young, have hereunto
set my hand and seal, this Seventeenth day of November, in
the year of our Lord One thousand eight hundred and seventy-
Witness,
EDMUND HUNT,
Patent Agent,
Glasgow.
W. YOUNG. (L.S.)