Ax. IMPROVED MODE OF BUSHING THE SHEAVES OF BLOCKS EMPLOYED FOR LIFTING HEAVY WEIGHTS, ALSO OF BUSHING ROLLERS INTENDED TO CARRY HEAVY WEIGHTS, TO ENABLE SUCH SAID SHEAVES AND ROLLERS TO MOVE MORE FREELY AND RENDER THEM MORE DURABLE
Year: 1868

page_text: LETTERS PATENT to John George Piton, of the Jerusalem Coffee
House, Cowper's Court, Cornhill, in the City of London, Master
Mariner, for the Invention of "Ax. IMPROVED MODE OF BUSHING THE
SHEAVES OF BLOCKS EMPLOYED FOR LIFTING HEAVY WEIGHTS, ALSO OF BUSHING
ROLLERS INTENDED TO CARRY HEAVY WEIGHTS, TO ENABLE SUCH SAID SHEAVES
AND ROLLERS TO MOVE MORE FREELY AND RENDER THEM MORE DURABLE."
Sealed the 16th March 1869, and dated the 21st September 1868..
PROVISIONAL SPECIFICATION left by the said John George Piton
at the Office of the Commissioners of Patents, with his Petition, on
the 21st September 1868.
I, JOHN GEORGE PITON, of the Jerusalem Coffee House, Cowper's
Court, Cornhill, in the City of London, Master Mariner, do hereby
declare the nature of the said Invention for "AN IMPROVED MODE OF
BUSHING THE SHEAVES OF BLOCKS EMPLOYED. FOR LIFTING HEAVY WEIGHTS, ALSO OF
BUSHING ROLLERS INTENDED TO CARRY HEAVY WEIGHTS, TO ENABLE SUCH SAID
SHEAVES AND ROLLERS TO MOVE MORE FREELY AND RENDER THEM MORE DURABLE,"
to be as follows:-
The novelty of this Invention consists in constructing the sheaves
of blocks and also rollers with loose bushes composed of two or more

page_text: concentric rings of metal or other suitable substance or material, a
recess being formed in the sheave or roller to receive the largest of
such said rings, the other smaller rings fitting easily therein and into
each other, so that when placed on the centre pin or axis of the sheave
or roller it shall move thereon more freely than when the bush is fixed
in the sheave or roller, as heretofore commonly practised in their con-
struction. The aforesaid concentric rings if made of metal may each.
be made of a different kind of metal, for example, suppose there are
two of such concentric rings, one may be of brass or gun metal and the
other of steel or iron, and the sheave of a different kind of metal to
that ring which is to be in contact therewith, and this applies to the
other rings composing the bushing, not limiting myself to the use of
metal only, but if desirable making one or other or all of the rings of
any suitable substance-other than metal.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John George Piton in the Great Scal Patent Office
on the 20th March 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
GEORGE PITON, of the Jerusalem Coffee House, Cowper's Court, Cornhill,
in the City of London, Master Mariner, send grecting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-first day of September, in the
year of our Lord One thousand eight hundred and sixty-eight, in the
thirty-second year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said John George Piton, Her special
licence that I, the said John George Piton, my executors, adminis
trators, and assigns, or such others as I, the said John George Piton, 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
MODE OF BUSHING THE SHEAVES OF BLOCKS EMPLOYED FOR LIFTING HEAVY WEIGHTS,
ALSO OF BUSHING ROLLERS INTENDED TO CARRY HEAVY WEIGHTS, TO ENABLE SUCH
SAID SHEAVES TO MOVE MORE FREELY AND RENDER THEM MORE DURABLE," upon

page_text: the condition (amongst others) that I, the said John George Piton, 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 performed, 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 John George Piton, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement, that is to say :-
This Invention consists in constructing the sheaves of blocks and
also rollers with loose bushes composed of one or more concentric rings
of metal or other suitable substance or material, a recess being formed
in the sheave or roller to receive the largest of such said rings, the
other smaller rings fitting casily therein and into cach other, so that
when placed on the centre pin or axis of the sheave or roller it shall
move thereon more freely than when the bush is fixed in the sheave
or roller, as heretofore commonly practised in their construction. The
aforesaid concentric rings if made of metal may cach be made of a
different kind of metal, for example, suppose there are two of such
concentric rings, one may be of brass or gun metal and the other
of steel or iron, and the sheave of a different kind of metal to
that ring which is to be in contact therewith, and this applies to the
other rings composing the bushing, not limiting myself to the use of
metal only, but if desirable making one or other or all of the rings
of any suitable substance other than metal.
And in order to explain my said Invention as completely as possible,
I now proceed to describe the best means I am acquainted with for
carrying the same into practical effect, reference being had to the
illustrative Sheet of Drawings accompanying these Presents, and to the
numeral figures and letters of reference marked thereon, as follows:-
DESCRIPTION OF THE DRAWING.
Figure 1 represents a transverse and vertical section of a metal sheave
shewing my improvements applied thereto; Figure 2 is a similar section
of a wooden sheave shewing my improvements adapted thereto;
Figure 3 is a similar section of an ordinary circular roller box for a

page_text: sheave shewing my improvements adapted thereto in lieu of the
ordinary rollers; Figure 4, a vertical section through the line A, B,
at Figure 3; Figure 5 represents a roller, box of a triangular shape
externally; and Figure 6 shews a roller box of a square shape externally.
At each of the foregoing Figures I employ similar letters of reference t
to denote corresponding parts in so far as such parts appear or can
be seen at each of such said Figures respectively.
At Figures 3 and 4 a is a strong circular flange with four holes for
rivetting or otherwise fastening it to a wooden sheave, the said flange
.to have a circular rim c attached to it, inside of which two or more
rings e, f, are placed and revolve with the sheave on the pin x. Another
flange of the same size as a is fastened on the other side of the sheave
as shown at Figure 2, in the same manner as is usually practised of
bushing sheaves with rollers. The revolving rings e, f, can be multiplied
to any number at pleasure, but more than -three are not recommended
with a good turned steel pin.
Having now fully described and set forth the nature and object of
this Invention for "An improved Mode of Bushing the Sheaves of
Blocks employed for Lifting Heavy Weights also of Bushing Rollers
intended to Carry Heavy Weights to enable such said Sheaves to Move
more Freely and Render them more Durable," together with the best
means I am acquainted with for carrying the same into practical effect,
I would remark in conclusion that what. I claim, as my Invention
intended to be secured to me by the herein-before in part recited Letters
Patent is, bushing the sheaves of blocks and rollers by the application
thereto of tubular rollers or concentric rings in the manner above
described with reference to the accompanying Drawing.
In witness whercof, I, the said John George Piton, have hereunto
set my hand and scal, this Eighteenth day of March, in the year
of our Lord One thousand eight hundred and sixty-nine.