IMPROVEMENTS IN CLEATS AND CHOCкs
Year: 1874

page_text: LETTERS PATENT. to Alfred Tattersall Gibson, of Liverpool, in the
County of Lancaster, Engineer, for the Invention of "IMPROVEMENTS
IN CLEATS AND CHOCкs."-A communication from abroad by William
Brown, of the City and State of New York, Engineer.
PROVISIONAL SPECIFICATION left by the said Alfred Tattersall Gibson
at the Office of the Commissioners of Patents; with his Petition,
on the 13th May 1874.
I, ALFRED TATTERSALL GIBSON, of Liverpool, in the County of Lan-
caster, Engineer, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN CLEATS AND CHOCKS," to be as follows:-
The object of my Invention is to obtain strength and durability in
cleats and chocks, together with reduced friction and wear on ropes.
For these purposes I form the body of the cleat or chock of cast iron or
other suitable material, and the surfaces where the cleat or chock and.

page_text: . rope come into contact of brass, Babbits', or other soft metal. To hold
the said soft metal securely in its place I cast it into or around recesses
or projections in or on the cleats or chocks. The said soft metal or
material may be secured by dovetailing or otherwise.
SPECIFICATION filed in pursuance of the conditions of the Letters
Patent, and of an Order of the Lord Chancellor, by the said Alfred
Tattersall Gibson in the Great Seal Patent Office on the 25th
November 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, Alfred
TATTERSALL GIBSON, of Liverpool, in the County of Lancaster, Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirtieth day of May, in the year of
our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Alfred Tattersall Gibson, Her special
licence, that I, the said Alfred Tattersall Gibson, my executors, admi-
nistrators, and assigns, or such others as I, the said Alfred Tattersall
Gibson, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times there-
after 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 In-
vention for "IMPROVEMENTS IN CLEATS AND CHOCKS," a communication to
him from abroad by William Brown, of the City and State of New York,
Engineer, upon the condition (amongst others) that I, the said Alfred
Tattersall Gibson, 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 on or before the Twenty-fifth
day of November next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that I, the said Alfred Tattersall Gibson, do hereby
.

page_text: is to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the accompanying
Sheet of illustrative Drawings, and to the figures and letters marked
thercon, that is to say :-
-
The object of my Invention is to obtain strength and durability in
cleats and chocks, together with reduced friction and wear on ropes.
For these purposes I form the body of the cleat or chock of cast iron or
other suitable material, and the surfaces where the cleat or chock and
rope come into contact of brass, Babbits', or other soft metal. To hold
the said soft metal securely in its place I cast it into or around recesses
or projections in or on the cleats or chocks. The said soft metal or
material may be secured by dovetailing or otherwise.
:
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a longitudinal section and Fig. 2 a plan view of a cleat or
chock constructed under my Invention. a is the body of the cleat or
chock, and b is the soft metal let into the body of such cleat or chock
and held in position by dovetail recesses in a.
Fig. 3 is a side elevation and Fig. 4 a plan view of another cleat or
chock under my Invention. a, body; b, soft metal.
-
Fig. 5 is a side elevation and Fig. 6 is a sectional plan view of a
further modification of a cleat or chock under my Invention. a, body of
cleat or chock; b, soft metal cast around a and secured by filling the
recesses C.
Fig. 7 is a side clevation and Fig. 8 a sectional plan view of another
modification of cleat or chock. Here a is the body formed of cast iron
and is the soft metal cast on the internal faces thereof and secured by
the projections d.
Fig. 9 is a side elevation and Fig. 10 a sectional plan view of a further
modification. a, body; b, soft metal.
It will be observed that in the cleats or chocks above described the
rope on that part of its surface where it binds or bears will come into
contact with the soft metal and not with the iron, thus preventing the
oxide or rust of iron from cutting or chafing such rope.
Having now described the nature of the said Invention. and par-
ticularized the same, I would have it understood that I do not confine
t

page_text: myself to the particular forms of cleats and chocks shown, as these may
be varied, nor do I restrict my Invention to the method of applying or
attaching the soft metal to the cast iron or other material. What I
claim is cleats or chocks fitted or provided with brass, Babbits', or soft
metal, substantially in the manner and for the purpose set forth.
In witness whereof, I, the said Alfred Tattersall Gibson, here.
unto set my hand and seal, the Twenty-third day of November,
in the year of our Lord One thousand eight hundred and seventy-
four.
In the
presence of
JAMES JOHNSON,
4, Clayton Square,
Patent Office,
Liverpool.
ALFRED T. GIBSON.
(L.S.)