CERTAIN IMPROVEMENTS ON OR SUBSTITUTES FOR PATTENS AND CLOGS
Year: 1823

page_text: GREENWOOD AND THACKRAH'S SPECIFICATION.
TO ALL TO WHOM THESE PRESENTS SHALL COME, wе, THOMAS
GREENWOOD, of Gildersom, near Leeds, Machine Maker, and JOSEPH THACKRAH,
Surgical Mechanist, of Leeds, both in the County of York, send greeting.
WHEREAS His most Excellent Majesty King George the Fourth did, by
His Letters Patent under the Great Seal of that part of the United Kingdom
of Great Britain and Ireland, called England, bearing date at Westminster,
the Twenty-seventh day of December, One thousand eight hundred and
twenty-three, in the fourth year of His reign, give and grant unto us, the said
Thomas. Greenwood and Joseph Thackrah, our exors, admors, and assigns,
His especial licence, full power, sole privilege and authority, that we, the said
Thomas Greenwood and Joseph Thackrah, our exors, adñors, 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, our Invention of "CERTAIN IMPROVEMENTS ON OR SUBSTITUTES FOR
PATTENS AND CLOGS;" in which said Letters Patent there is contained a proviso,
that if we, the said Thomas Greenwood and Joseph Thackrah, shall not
particularly describe and ascertain the nature of our said Invention, and in
what manner the same is to be performed, by an instrument in writing under
our hands and seals, or under the hand and seal of one of us, and cause the
same to be inrolled in His Majesty's High Court of Chancery within two
calendar months next and immediately after the date of the said Letters
Patent, that then the said Letters Patent, and all liberties and advantages

page_text: whatsoever thereby granted, shall utterly cease, determine and become void,
as in and by the same, relation being thereunto had, will more fully and at
large appear.
NOW KNOW YE, that in compliance with the said proviso, we, the said
Thomas Greenwood and Joseph Thackrah, do hereby declare that the nature
of our said Invention, and the manner in which the same is to be performed,
are particularly described and ascertained in and by the Drawing hereunto
annexed, and the following description thereof (that is to say):-
Our improvements on or substitutes for pattens and clogs consists in making
the soles of such pattens and clogs of elastic materials, by which they may accomo-
date themselves to the spring of the foot in walking. Thesoles of pattens and
clogs have heretofore been usually made of wood or some stiff non-elastic
substance, but our improved pattens and clogs are proposed to be made with
soles of leather, whalebone, horn, hard, rolled, or hammered metal, or any
other elastic substance or substances combined.
In the Drawing hereunto annexed, Fig. 1 shews a patten upon our improved
plan. The sole a, a, is made of thick leather, such as is usually employed for
the soles of shoes, and on the underside of the leather a thin elastic plate of
steel b, b, about the substance of a saw blade, is attached by means of rivets
or other convenient means. Previous to uniting the leather and steel soles
together, the plates are perforated with such holes as may be necessary for the
purpose of riveting or otherwise fastening the rings or irons thereto, and also
for attaching the straps or ties, heel-piece, &c.; which mode of fastening the
rings or irons under the pattens much more durable than when affixed to
wood. After this is done the elastic steel plate is secured to the leather sole
by several rivets or other fastenings; we usually put three near each end,
leaving the small or middle part at liberty, which completes the patten as
shewn in the Figure.
In this, as before, the
is a plate of thin steel;
This plate is perforated
Fig. 2 represents a clog upon our improved plan.
sole is made of thick leather, and under the leather
a, a, is the leather sole; b, b, the thin plate of steel.
with holes for the purpose of attaching the wooden blocks, as well as the
straps or ties, heel piece, &c.; and when that is done the steel plate and
the leather are united by rivets as before.
We have thus described the precise mode by which we usually make our
improved pattens and clogs, and also the materials which we in general prefer
to use; but we wish it to be understood that we do not mean to confine our-
selves to the exact manner of operating described above, nor do we intend to
limit ourselves to the use of the materials above mentioned, our Invention

page_text: being simply an elastic or flexible sole applied to pattens and clogs of whatever
material or materials that sole may be made, and which elastic soles, as applied
to pattens and clogs, being to the best of our knowledge a new contrivanco
and never before used in this Kingdom.
We claim under the above-recited Letters Patent the exclusive right and
privilege to make, use, exercise, and vend within these IIis Majesty's
Dominions of England and Wales, as above recited.
In witness whereof, I, the said Thomas Greenwood, have hereunto set
my hand and seal, this Twenty-sixth day of February, in the year of
our Lord One thousand eight hundred and twenty-four.
THOMAS (L.s.) GREENWOOD.
AND BE IT REMEMBERED, that on the Twenty-sixth day of February,
in the year of our Lord 1824, the aforesaid Thomas Greenwood came before
our said Lord the King in His 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.
Inrolled the Twenty-sixth day of. February, in the year of our Lord
One thousand eight hundred and twenty-four.