VARIOUS IMPROVEMENTS IN THE CONSTRUCTION OF A HORIZONTAL WINDMILL THAT MAY BE APPLIED TO ALL SORTS OF MACHINERY THAT IS TO BE WORKED BY WIND
Year: 1813

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
WALKER, of the City of Norwich, Machine Maker, send greeting.
WHEREAS His 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 Fifth day of May, in
the fifty-third year of His reign, give and, grant unto me, the said Thomas
Walker, my exors, admors, and assigns, His especial licence, full power,
sole privilege and authority, that I.. the said Thomas Walker, my exors,
admors, and assigns, should and lawfully might, during the term of years
therein mentioned, make, use, exercise, and vend, within England, Wales, and
the Town of Berwick-upon-Tweed, my Invention of "VARIOUS IMPROVEMENTS IN
THE CONSTRUCTION OF A HORIZONTAL WINDMILL THAT MAY BE APPLIED TO ALL SORTS OF
MACHINERY THAT IS TO BE WORKED BY WIND;" in which said Letters Patent there
is contained a proviso, that if I, the said Thomas Walker, shall not particularly
describe and ascertain the nature of my said Invention, and in what manner.
the same is to be performed, by an instrument in writing under my hand and
seal, and cause the same to be inrolled in His Majesty's High Court of Chan-
cery within six calendar months next and immediately after the date of the
said Letters Patent, that then the said Letters Patent, and all liberties and
advantages whatsoever thereby granted, shall utterly cease, determine, and
become void, 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
Thomas Walker, do hereby declare that the nature of my said Invention, and

page_text: the manner in which the same is to be performed, are particularly described
and ascertained in and by the Drawings hereunto annexed, and the following
references or description thereof, that is to say:-
No. 1 represents the bottom, and No. 2 the top; No. 3 the elevation; No. 4
the leaver that regulates the shutters by a weight acting on a pulley fastened
by a chain or cord at the back side of the leaver, going through the board
fastened to the rod that is connected with the shutters, there being a weight at
the bottom to work against the weight at the top that takes the wind on or off
by the leaver board. As the wind blows stronger the shutters close too by
putting more or less weight at the bottoni, as may be thought proper. No. 5,
the arms to carry the vanes of one partition fixed according to the plan, the
vanes being made of thin boards, the one standing edge upwards, and the other
put on the top leaning towards the wind, forming the 8th angle. The vanes
are sixteen in number; every fourth must be filled with thin boards, as the wind
would have great power over them when in action. When the vanes are fixed
their proper places they will form a >. In the inside of them, when only
tour of them must be boarded up, there must be some strong boards fastened
to the arms across the vacant places, that form the to carry the vanes.
No. 6, the elevation of the vanes and upright shaft that
forms the ends of the vanes. When the windmill is in
must be four open and four shut, except the wind blows very strong, then six
shut and two open.
carry them; No. 7
action the shutters
In witness whereof, I, the said Thomas Walker, have hereunto set my
hand and seal, this Twenty-eighth day of October, in the year of our
Lord One thousand eight hundred and thisto
Inrolled the Thirtieth day of October, in the year of our Lord One
thousand eight hundred and thirteen.