AN IMPROVED ASHES HOIST."
Year: 1871

page_text: LETTERS PATENT to John Purves, of Liverpool, in the County of
Lancaster, Engineer, for the Invention of "AN IMPROVED ASHES
HOIST."'
:
Sealed the 9th January 1872, and dated the 11th July 1871:
PROVISIONAL SPECIFICATION left by the said John Purves at the
Office of the Commissioners of Patents, with his Petition, on the
11th July 1871.
I, JOHN PURVES, of Liverpool, in the County of Lancaster, Engineer,
do hereby declare the nature of the said Invention for "AN IMPROVED
ASHES HOIST," to be as follows:-
The object of my Invention is to provide an efficient, simple,. and
durable hoist for raising or elevating ashes from the stoke holes of steam
ships and from sunk stoke holes generally. For that purpose I fit a
cylinder with a piston and piston rod and to the latter I connect two,
three, or more sheaves. A chain or rope is rove around the said slicaves
and also around another set of sheaves in a stationary frame. When

page_text: steam is admitted to the cylinder the piston, piston rod, and connected
sheaves are caused to move. A long travel is thus given to the chain or
rope to which the bucket or other hoisting vessel containing the ashes is
connected, hence one stroke of the piston in a cylinder of convenient
length is made to elevate a load of ashes the required height. ·
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Purves in the Great Seal Patent Office on
the 11th January 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
PURVES, of Liverpool, in the County of Lancaster, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of July, in the year of our
Lord One thousand eight hundred and seventy-one, in the thirty-fifth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said John Purves, Her special licence that I, the
said John Purves, my executors, administrators, and assigns, or such
others as I, the said John Purves, 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 "AN IMPROVED ASHES HOIST," upon the condition
(amongst others) that I, the said John Purves, my executors or admi-
nistrators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain tho
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 Scal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said John Purves, 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, reference being had to the, accompanying Sheet of

page_text: attendant.admits or cuts off steam, and so raises or lowers the ashes
vessel at the required times. If desired a slide valve could be applied.
As here shown the weight of the piston, piston rod, cross head, and
sheaves. with that of the ashes vessel are intended to lower the latter.
It will be evident that if desired steam can be admitted on to the top of
the piston, and in that case the space over the piston will not be open to
the atmosphere, whilst a cut-off lever similar to m might be used for the
down stroke. It will be evident too that the cylinder may be placed
in a horizontal or diagonal position.
Having now described the nature of my said Invention, and parti-
cularized the same in such manner that others will be enabled to carry
the same into effect, I claim, fitting to the end of the piston rod of a
single or double acting steam or motive-power engine two, three, or
more sheaves, and passing a rope, chain, or band around the said sheaves,
and also around two, three, or more sheaves in a stationary frame when
the free end of the said rope, chain, or band is employed directly or
indirectly to elevate a vessel or vessels containing ashes, whereby to
ensure that one stroke of a piston, piston rod, and sheaves shall raise
a load the required distance.
In witness whereof, I, the said John Purves, have hereunto sct
my hand and scal, the Ninth day of January, in the year of
our Lord One thousand eight hundred and seventy-two.
In the presence of,
JAMES JOHNSON,
Draughtsman to J. T. King,
4, Clayton Sq.,
Liverpool.
JOHN PURVES. (L.S.)