AN IMPROVED ARRANGEMENT OF MACHINERY OR APPARATUS FOR TRANSMITTING MOTION TO SEWING MACHINES." OR APPARATUS FOR TRANSMITTING MOTION TO SEWING MACHINES
Year: 1872

page_text: LETTERS PATENT to Isaac Pickard, of Leeds, in the County of
.
York, for the Invention of "AN IMPROVED ARRANGEMENT OF MACHINERY
OR APPARATUS FOR TRANSMITTING MOTION TO SEWING MACHINES."
OR APPARATUS FOR TRANSMITTING MOTION TO SEWING MACHINES."
Scaled the 20th September 1872, and dated the 23rd March 1872.
PROVISIONAL SPECIFICATION left by the said Isaac Pickard at the
Office of the Commissioners of Patents, with his Petition, on the
23rd March 1872.
I, ISAAC PICKARD, of Leeds, in the County of York, do hereby declare
the nature of the said Invention for "AN IMPROVED ARRANGEMENT OF
MACHINERY OR APPARATUS FOR TRANSMITTING MOTION TO SEWING MACHINES," to
be as follows:-
My Invention has reference to sewing machines worked by treadle
and is as hereafter described.
I mount between the standards of the sewing machine table and in
suitable bearings a crank shaft provided with two cranks placed by
preference at right angles to each other, though not necessarily so.

page_text: Each crank is provided with a separate connecting rod and treadle of
ordinary construction. By having two cranks at right angles the dead
centres which occur when one crank only is used is avoided; as for
instance, according to my Invention, when one crank is at the bottom.
of its stroke the other is only half way, and by pressure on the treadle
connected therewith motion is given to the treadle wheel and thence
to the machine without applying the hand to the treadle wheel as
hitherto necessary when starting the machine.
When only one crank is used the machine stops generally when the
crank is on the top or bottom centre, and it is always necessary to apply
the hand to the treadle wheel and give it a turn to start the machine.
This improvement facilitates the working of sewing machines and is
particularly applicable to those employed for heavy work.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Isaac Pickard in the Great Seal Patent Office on
the 23rd September 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ISAAC
PICKARD, of Leeds, in the County of York, send greeting.
.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-third day of March, in the year
of our Lord One thousand eight hundred and seventy-two, in the
thirty-fifth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Isaac Pickard, Her special licence that
I, the said Isaac Pickard, my executors, administrators, and assigns, or
such others as I, the said Isaac Pickard, 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 ARRANGEMENT OF
MACHINERY OR APPARATUS FOR TRANSMITTING MOTION TO SEWING MACHINES,"
upon the condition (amongst others) that I, the said Isaac Pickard,
my executors or administrators, by an instrument in writing under

page_text: 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 imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Isaac Pickard, 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 Drawings,
and to the letters of reference marked thereon, that is to say:
My Invention has reference to sewing machines worked by treadle
and is as hereafter described.
The Invention will be best understood by reference to the accom-
panying Sheet of Drawings.
:
Figure 1 is a longitudinal elevation, and Figure 2 a cross section
shewing my Invention.
I mount between two standards a of a sewing machine table 6, and in
suitable bearings ca crank shaft d provided with two cranks e and f
placed by preference at right angles to each other as shewn, though not
necessarily so. Each cranke and fis provided with a separate connecting
rod g and a treadle h, which are of ordinary construction. By having two
cranks at right angles the dead centres which occur when one crank only
is used is avoided in the most effective manner; as for instance, according
to my Invention, when one crank e is on a dead centre as shewn, the
crank fis only half way, and by pressure on the treadle h in connection
therewith motion is given to the treadle wheel i and thence to the
machine on the table b, without applying the hand to the treadle wheel
as hitherto necessary when starting the machine.
When only one crank is used the machine stops generally when the
crank is on the top or bottom centre, and it is always necessary to
apply the hand to the treadle wheel and give it a turn to start the
machine. The herein fully described improvement facilitates the working
of sewing machines, and is particularly applicable to those employed for
heavy work.
.

page_text: manner in which the same is to be performed, I would remark in
conclusion that I do not limit myself to the exact details and con-
figuration of parts I have explained and shewn, as the same may of
course be varied or modified without' in any way departing from the
nature and principle of my Invention, but what I do claim and desire
to be secured to me by Letters Patent is as follows:-The arrangement,
combination, and application of the two cranks e and set at an angle
to each other on the shaft d, and the parts connected therewith for
transmitting motion to sewing machines, substantially as and for the
purposes herein set forth.
In witness whereof, I, the said Isaac Pickard, have hereunto set
my hand and seal, this Seventeenth day of September in the
year of our Lord One thousand eight hundred and seventy-two.
Witness,
J. W. HARDING,
Patent Agent,
2, East Parade,
Leeds.
ISAAC PICKARD. (L.S.)