IMPROVEMENTS IN TOOTHED CHAINS FOR WORKING TOOTHED OR CHAIN WHEELS
Year: 1864

page_text: LETTERS PATENT to James Slater, of Salford, in the County of Lancaster,
Chain Maker, for the Invention of "IMPROVEMENTS IN TOOTHED CHAINS
FOR WORKING TOOTHED OR CHAIN WHEELS."
Sealed the 7th February 1865, and dated the 12th October 1864.
PROVISIONAL SPECIFICATION left by the said James Slater at the
Office of the Commissioners of Patents, with his Petition, on the 12th
· October 1864.
I, JAMES SLATER, of Salford, in the County of Lancaster, Chain Maker,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
TOOTHED CHAINS FOR WORKING TOOTHED OR CHAIN WHEELS," to be as follows:-
The sides of the chain are composed of as many links as required, and
made of any desired pitch and strength. The distance between the inner
links depends upon the thickness of the wheel; but over the pins which
constitute the pitch and hold the links together, I place hoops or ferrules, so
fitted that they can .turn on the pins but not shake, which hoops or ferrules
are intended to substitute the solid links before in use.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said James Slater in the Great Seal Patent Office on the 12th
April 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
SLATER, of-Salford,-in-the-County of Lancaster, Chain Maker, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twelfth day of October, in the year of our Lord
One thousand eight hundred and sixty-four, in the twenty-eighth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said James Slater, Her special license that I, the said James Slater, my
executors, administrators, and assigns, or such others as I, the said James
Slater, 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 "IMPROVEMENTS IN TOOTHED CHAINS
FOR WORKING TOOTHED OR CHAIN WHEELS," upon the condition (amongst others)
that I, the said James Slater, 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 James Slater, do hereby declare
the nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement (that is to say):-
The sides of the chain are composed of as many links as required, and
made of any desired pitch and strength. The distance between the inner
links depends upon the thickness of the wheel; but over the pins which
constitute: the pitch and hold the links together I place hoops or ferrules, so
fitted that they can turn on the pins but not shake, which hoops or ferrules
are intended to substitute the solid links or pins before in use.
These improvements will be clearly understood by referring to the figures
and letters on the accompanying Sheet of Drawings, in which Fig. 1 is a side
elevation of a toothed or chain wheel, having geared into it one of my improved
toothed chains, the chain being partly in elevation and partly in section;

page_text: Fig. 2 a plan of the chain only; and Figs. 3 and 4 are similar views of
another chain wheel and toothed chain modified to suit it.
a, in Fig. 1, represents the toothed wheel; b, in Figs. 1 and 2, the sides or
links of the chain; c; the pins for holding them together, and d the hoops
or ferrules which are fitted to the pins.
In this arrangement it will be seen that there is a space between each hoop
or ferrule for the teeth of the wheel to gear into, and that the hoops or ferrules
form the teeth which gear into the spaces between the teeth of the wheel;
and it is evident that if the chain is applied to a wheel of the same diameter,
but having only half the number of teeth, there will be an unoccupied space
in the chain at the side of each space occupied by a tooth of the wheel; or,
in other words, that between two spaces occupied by two teeth there will be
one space of the chain. unoccupied.
In Fig. 3 I represent a modified arrangement of my improved toothed
chain applied to a wheel of the same diameter as that shewn in Fig. 1, but
with half the number of teeth; and in Fig. 4 a plan of the chain only.
Instead of employing single hoops or ferrules, as before described, I form
two together, as shewn at e, and place them loose on pins rivetted to the links,
the double boops entering the spaces between the teeth of the wheel, and the
spaces between the double hoops gearing on the teeth of the wheel.
Having now described the nature and particulars of my said Invention,
and the manner in which the same is to be performed, I desire it to be under-
stood that I claim the improvements in toothed chains for working toothed or
chain wheels, as herein described and illustrated in the accompanying Sheet
of Drawings.
In witness whereof, I, the said James Slater, have hereunto set my hand
and seal, this Eleventh day of April, in the year of our Lord One
thousand eight hundred and sixty-five.
Signed, sealed, and delivered by the
within-named James Slater, in
the presence of
E. J. HUGHES,
Patent Agent,
Manchester.
JAMES SLATER.
(L.S.)

page_text: Lord One thousand eight hundred and sixty-four, grant to the said James
Slater, his executors, administrators, and assigns, the sole use, benefit, and
advantage of his Invention of "IMPROVEMENTS IN TOOTHED CHAINS FOR WORKING
TOOTHED-OR CHAIN WHEELS," as expressed in the Specification filed in pursuance
of a proviso in the said-Letters-Patent_contained.
And whereas since the date of the said Letters Patent, and of the filing-of-
the Final Specification thereof, I have been advised that it is not desirable to
retain as part of the said Specification and Letters Patent a certain portion
described in the said Final Specification and illustrated in the Drawings
accompanying the same, to wit, that part described as a modification of the
general principle of my Invention; I am therefore desirous of disclaiming-such
portion or portions of the said Specification and Drawings accompanying the
same as relates to the modification aforesaid.
NOW KNOW YE, that I, the said James Slater, by and with the leave of
Her Majesty's Attorney General, do hereby disclaim so much of the said
Specification as relates to the modification aforesaid; and I do hereby alter the
said Specification by omitting the parts struck out, so that the said Specification
when altered by my Disclaimer shall be in the words, letters, and figures
following (that is to say):-
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
SLATER, of Salford, in the County of Lancaster, Chain Maker, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent bearing date the Twelfth day of October, in the year of our Lord One
thousand eight hundred and sixty-four, in the twenty-eighth year of Her reign,
did for Herself, Her beirs and successors, give and grant unto me, the said
James Slater, Her special license that I, the said James Slater, my
executors, administrators, and assigns, or such others as I, the said James
Slater, 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 "IMPROVEMENTS IN TOOTHED CHAINS FOR
WORKING TOOTHED OR CHAIN WHEELS," upon the condition (amongst others)
that 1, the said James Slater, my executors or administrators, by an instru-
ment 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

page_text: 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 James Slater, do hereby declare the
nature of my said Invention, and in what manner the same is to be* per-
formed, to be particularly described and ascertained in and by the following
statement (that is to say):-
.
The sides of the chain are composed of as many links as required, and
made of any desired pitch and strength. The distance between the inner
links depends upon the thickness of the wheel, but over the pins which
constitute the pitch and hold the links together, I place hoops or ferrules so
fitted so fitted that they can turn on the pins but not shake, which hoops or
ferrules are intended to substitute the solid links or pins before in use.
These improvements will be clearly understood by referring to the figures and
letters on the accompanying Sheet of Drawings, in which Fig. 1 is a side
elevation of a toothed or chain wheel having geared into it one of my improved
toothed chains, the chain being partly in elevation and partly in section, Fig. 2
a plan of the chain only, and Figs.-g-and-4-are-similar-views-of-another-ehain
wheel-and-toothed-chain-modified-to-suit-it.
a, in Fig. 1, represents the toothed wheel; b, in Figs. 1 and 2, the sides or links
of the chain; c, the pins for holding them together; and d, the hoops or ferrules
which are fitted to the pins. In this arrangement it will be seen that there is
a space between each hoop or ferrule for the teeth of the wheel to gear into,
and that the hoops or ferrules form the teeth which gear into the spaces
between the teeth of the wheel, and it is evident that if the chain is applied
to a wheel of the same diameter but having only half the number of teeth
there will be an unoccupied space in the chain at the side of each space
occupied by a tooth of the wheel, or in other words that between two spaces
occupied by two teeth there will be one space of the chain unoccupied.
In Fig. 3 I-represent a modified-arrangement-of-my-improved-toothed-chain
applied-to-a-wheel-of-the-same-diameter-as-that-shewn-in-Fig.-1-but-with-half-the
number-of-teeth-and-in-Fig.-4-a-plan of the chain only. Instead of employing
single-hoops-or-ferrules-as-before-described, I-form-two-together-as-shewn-at-ey-and
place-them-loose-on-pins-rivetted-to-the-links,-the-double-boops-entering-the-spaces
between-the-teeth-of-the-wheel-and-the-spaces between-the-double-hoops-gearing
en-the-teeth-of-the-wheel.
Having now described the nature and particulars of my said Invention,
and the manner in which the same is to be performed, I desire it to be

page_text: understood that I claim the improvements in toothed chains for working toothed
or chain wheels as herein described and illustrated in the accompanying Sheet
of Drawings.
In witness whereof, I, the said James Slater, have hereunto set my
-hand-and-seal,-this-Eleventh-day-of-April,-in-the-year--of-our-Lord-
In witness whereof, I, the said James Slater, have hereunto set my hand
and seal, this Thirtieth day of December, in the year of our Lord 1
One thousand eight hundred and sixty-seven.