SEWING MACHINES
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by the said Thomas Fletcher at the
Office of the Commissioners of Patents on the 14th July 1880.
THOMAS FLETCHER, of Hyde, in the County of Chester.
SEWING MACHINES."
"
IMPROVEMENTS IN
In sewing machines of the usual construction the needle bar is connected to the
arm by a small steel stud, on which is a belt or collar which works in the bearing
where the stud passes through the arm; this bearing becomes worn by the stud,
and causes irregularity in the rise and fall of the needle. Now my Invention
consists in placing an india rubber washer on the stud, where it passes through
the arm, rather larger than the bearing in the arm into which it is pressed; this
washer can easily be renewed, and a regular and slightly elastic action of the
needle is thereby maintained. A similar india rubber washer may be applied to
the stud on the end of the arm driven from the eccentric shaft.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Fletcher in the Great Seal Patent Office on the 14th
January 1881.
THOMAS FLETCHER, of Hyde, in the County of Chester.
SEWING MACHINES."
“IMPROVEMENTS IN
In sewing machines of the usual construction the needle bar is connected to the
arm by a small steel stud, on which is a belt or collar which works in the bearing
where the stud passes through the arm; this bearing becomes worn by the stud

page_text: (and the stud also wears), and causes irregularity in the rise and fall of the
needle.
Now my Invention consists in placing an india rubber washer on the stud where
it passes through the arm, rather larger than the bearing in the arm into which it
is pressed; this washer can easily be renewed, and a regular and slightly elastic
action of the needle is thereby maintained.
A similar india rubber washer may be applied to the stud on the end of the arm
driven from the eccentric shaft.
And in order that my Invention may be fully understood and readily carried
into effect, I will describe the accompanying Sheet of Drawings, reference being
had to the figures and letters marked thereon.
Figure 1 is an elevation of a sewing machine to which my Invention is applied,
and Figure 2-shows-on an enlarged scale the stud c; a is the needle bar; b is the
arm which is bored to receive the stud c (fixed in the needle bar-a); in this stud is
an annular groove to receivo an india rubber washer e, larger in diameter than the
stud and larger than the bearing in the arm b; d is the eccentric (or driving)
shaft; is the connecting rod which actuates the arm b when the shaft & is set in
motion; f is a stud screwed into one end of the arm b; in this stud is an annular
groove to receive an india rubber washer i; on one end of the connecting rod h is
formed an annular clamp to pass over and form a bearing for the stud f, the other
end of the connecting rod is bored to fit the eccentric on the driving shaft.
When the driving shaft rotates the connecting rod imparts an oscillating motion
to the arm b, and the india rubber washer i, on the stud f, causes an elastic motion
to be imparted to the arm, and also prevents the stud and its bearing in the
connecting rod-from-wearing...
The india rubber washer c on the stud c (which is fixed to the needle bar),
passing through the bearing near the end of the arm b, causes an clastic and regular
motion to be imparted to the needle bar and prevents the wear of the bearing in
the arm and of the stud c; it also obviates the danger of breaking the arm when
the bearing becomes worn.
When the india rubber washor c is used on the stud c, it is not necessary to raise
or lower the needle in the bar, as is usual when the stud c or the bearing in tho
arm wears.
When the stud c and its bearing in the arm b become worn, the needle often
comes in contact with the loopor, thus injuring the looper, and frequently breaking
the needle.
The studs to which the india rubber washers are applied work noiselessly, and
nced no oil.
The washers may be made of other material instead of india rubber, but I prefer
india rubber..
Having stated the nature of my Invention, and described the manner of
performing the same, I declare that
I claim the application of the elastic washers c and i to the studs c and ƒ,
substantially as shown and described.
In witness whereof, T, the said Thomas Fletcher, have hereunto set my hand
and seal, this Twelfth day of January, One thousand eight hundred and
eighty one.
THOMAS FLETCHER. (L.S.)