IMPROVEMENTS IN PURCHASES FOR THE RAISING AND LOWERING OF WEIGHTS BY MEANS OF
Year: 1858

page_text: LETTERS PATENT to Jonathan Wardill, of Commercial Road East, in
the County of Middlesex, Engineer, for the Invention of "IMPROVEMENTS
IN PURCHASES FOR THE RAISING AND LOWERING OF WEIGHTS BY MEANS OF
"
Sealed the 3rd May 1859, and dated the 8th November 1858.
PROVISIONAL SPECIFICATION left by the said Jonathan Wardill at the
Office of the Commissioners of Patents, with his Petition, on the
8th November 1858.
I, JONATHAN WARDILL, of Commercial Road East, in the County of Mid-
dlesex, Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN PURCHASES POR THE RAISING AND LOWERING OF WEIGHTS BY
MEANS OF CHAINS, ESPECIALLY APPLICABLE TO SHIPS' CAPSTANS AND WINDLASSES,"
to be as follows:-
"
My Invention consists in constructing purchases in such manner that a
bite is afforded for both the horizontal and vertical links of the chain, or those
links which alternately assume a vertical and horizontal position when being
passed or wound over a windlass or drum. For this purpose I take a central
piece or core, and form round the periphery thereof (say) five concave spaces
intended to receive those links, which, when the purchase itself is used

page_text: vertically, pass in a vertical position. I bolt, cast, or form this central corc
between two flat-sided discs or plates, provided on their inner faces each with
as many radial chocks or blocks as there are concave spaces in the core.
These radial blocks on the two discs come opposite each other, and over or
in line with the centre of each concave space, then between the radial blocks
are laid or cast on each disc flat blocks, which form with the radial blocks
hollow chambers, and when the chains are passing receive those links which
are presented horizontally: The radial blocks are curved or sloped off at
bottom where they join the discs. In the case of open link chains an
additional grip may be obtained by means of a tongue or projection carried
up from that portion of the periphery of the core which divides or separates
one concave space from another.
SPECIFICATION in pursuance of .the conditions of the Letters Patent, filed
by the said Jonathan Wardill in the Great Seal Patent Office on the
7th May 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JONATHAN
WARDILL, of Commercial Road East, in the County of Middlesex, Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighth day of November, in the year of our Lord
One thousand eight-hundred and fifty-eight, in the twenty-second year of Her.
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Jonathan Wardill, Her special licence that I, the said Jonathan
Wardill, my executors, administrators, and assigns, or such others as I, the
said Jonathan Wardill, 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
Ireland, the Channel Islands, and Isle of Man, an Invention for "IMPROVE-
MENTS IN PURCHASES FOR THE RAISING AND LOWERING OF WEIGHTS BY MEANS OF
CHAINS, ESPECIALLY APPICABLE TO SHIPS' CAPSTANS AND WINDLASSES," upon the
condition (amongst others) that I, tho said Jonathan Wardill, 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 perforined,

page_text: 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 Jonathan Wardill, 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 thercof, reference being had to the Drawings hereunto annexed,
that is to say-
My Invention consists in constructing purchases in such manner that a
bite is afforded for both the horizontal and vertical links of the chain, or
those links which alternately assume a vertical and horizontal position when
being passed or wound over a windlass or drum. For this purpose I take a
central piece or core, and form round the periphery thereof (say) five concave
spaces intended to receive those links which, when the purchase itself is used,
vertically, pass in a vertical position. I bolt, cast, or form this central core
between two flat-sided discs or plates, provided on their inner faces each with
as many radial chocks or blocks as there are concave spaces in the core.
These radial blocks on the two discs come opposite each other, and over or in
a line with the centre of each concave space, then between the radial blocks
are laid or cast on each disc flat blocks, which form with the radial blocks
hollow chambers, and when the chains are passing receive those links which
are presented horizontally. The radial blocks are curved or sloped off at
bottom where they join the discs. In the case of open link chains an
additional grip may be obtained by means of a tongue or projection carried
up from that portion of the periphery of the core which divides or separates
one concave space from another.
Figure 1 of the accompanying Drawings is a front view of this purchase;
Figure 2 is a section through the line a, b, of Figure 1, and Figure 3 is a
section through the line c, d, of Figure 2. A is the centre piece or core;
B, B, B, B, B, are the concave spaces formed round the periphery of the
core; C, C, are the flat-sided discs, having radial chocks or blocks
D, D, D, D, D, formed on them; E, E, E, E, E, are flat blocks placed
between the radial blocks.
Although I have shewn five concave spaces and blocks, I do not limit
myself to that number, as the same may be varied without departing from
the essential features of my Invention.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I claim the manufacture
:

page_text: of purchases in such manner that a bite is afforded for both the horizontal
and vertical links of a chain, as herein-before described and illustrated in the
accompanying Drawings.
In witness whereof, I, the said Jonathan Wardill, have hereunto set my
hand and seal, this Seventh day of May, One thousand eight hundred
and fifty-nine
J. WARDILL. (L.S.)