AN IMPROVEMENT IN HANGING AND SECURING GRINDSTONES FROM BREAKING IN THE MIDDLE OR CENTRE;
Year: 1810

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
SLATER, of Birmingham, in the County of Warwick, Coach Spring Maker,
send greeting.
WHEREAS Ilis most Excellent Majesty King George the Third did, by
His Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Twelfth day of February,
in the fiftieth year of His reign, give and grant unto me, the said John Slater,
my exors, admors, and assigns, his especial licence, full power, sole priviledge
and authority, that I, the said John Slater, my exors, adiñors, and assigns,
during the term of years therein mentioned, should and lawfully might make,
use, exercise, and vend, within England, Wales, and the Town of Berwick-
upon-Tweed, my Invention of "AN IMPROVEMENT IN HANGING AND SECURING
GRINDSTONES FROM BREAKING IN THE MIDDLE OR CENTRE;" in which said Letters
Patent there is contained a proviso, obliging me, the said John Slater, by an
instrument in writing under my hand and seal, to cause a particular description
of the nature of my said Invention, and in what manner the same is to be
performed, to be inrolled in His Majesty's High Court of Chancery within two
calendar months after the date of the said recited Letters Patent, as in and by
the same, relation being thereunto had, may more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
John Slater, do hereby declare that my said Invention is described in and by

page_text: The Drawings in the margin hereof, and the following description thereof, that
is to say:-
First, I cause cach grindstone to be hung through its centre upon a spindle
in the customary manner, tight wedging excepted, and then I place on cach
side of the grindstone a flat piece of wood, or washer, or other substance of a
soft or yielding naturo, which must extend in a circle from the spindle hole in
the grindstone to any degree or part of its diameter as may be found most
convenient to form a bed or equal bearing against or upon the wood or washer,
so described. I place on each side of the grindstone a flat ring or rings of iron
or other metal, wrought or cast, about half an inch thick, more or less, and the
diameter of the circle of each ring or rings must be about twenty-four inches,
more or less, as may be most conveniently adapted to the magnitude of the
grindstone, and to which ring or rings I add a pair of strong gripes or bracing
plates with screws made of iron or any other metal, each of which pair of
gripes or bracing plates is to be a strong flat circular plate, and correspondent
in diameter with the ring or rings described above, and each griper or bracing
plate must have a hole in its centre of a proper size and figure to admit and
receive the spindle of the grindstone; and also, as near as convenient to and
round the circular outward edges of each griper or bracing plate, I cause holes
to be made at small distances of a proper size and form to receive, or admit
screwed nuts or barrs, fitted and screwed to them, so as to hold and admit of
strong screw pins or bolts, which must be made to screw pointedly or in a
direct manner towards the before-described ring or rings and grindstone. The
strong gripes or bracing plates with strong screws may be made occasionally
with or without tho nuts or barrs, as their necessity depends upon the gripes or
bracing plates being made of cast or wrought iron. The gripes or bracing
plates being thus made, I then place them upon the rings, and on each side of
the grindstone, the spindle of the said grindstone passing through them all,
which are then to be screwed compleatly tight and firm to their places by
cotters through or screws fixed to the spindle of the grindstone on the outside
of the whole griping or bracing, apparatus; I then firmly screw the screws
or bolts in the gripes or bracing plates on or against the rings or washers, so
as to press, gripe, or brace, and hold the grindstone between the apparatus on
each and both its sides. And for the better elucidation of my said appa-
ratus, I have caused Drawings to be made in the margin of these Presents.
In witness whereof, I, the said John-Slater, have hereunto set my hand
and seal; the Third day of April, in the year of our Lord One thousand
eight hundred and ten.
•
JOHN SLATER. (L.B.)

page_text: AND BE IT REMEMBERED, that on the Third day of April, in the year
of our Lord 1810, the aforesaid John Slater came before our said Lord the
King in Ilis Chancery, and acknowledged the Specification aforesaid, and all
and every thing therein contained and specified, in form, above written. And
also the Specification aforesaid was stampt according to the tenor of the Statute
made for that purpose.