Year: 1874

page_text: missioners of Patents, the said Letters Patent have been transferred and
made over to me, the said William Hall Pearson:
And whereas I have been advised that the Specification of the said
Patent and the Drawing annexed thereto are defective, owing to some
inaccuracies and omissions which present difficulties to the under- 5
standing of certain of the details of construction of the improved
machine, and further that the Specification contains some suggestions
as to modifications which would require the exercise of ingenuity to
carry out, and that for these reasons objection may be taken to the
sufficiency of the Specification:
And whereas, in order to remove all grounds for such an objection, I
am desirous to amend, by way of Disclaimer and Memorandum of
Alteration, the Specification of the said Patent, and to file a corrected
Sheet of Drawings, and also to alter the claims so as to remove all
reference to shuttle machines, and confine the claims to chain stitch 1
machines; I do therefore hereby disclaim, strike out, and amend certain
words and expressions in the Specification of the said Patent as follows,
that is to say :-
1
In the printed copy of the Specification at page 3, line 21, after the
word "elevation" I introduce the following explanatory words,
of my
improved machine for producing single thread chain stitches." At the
end of line 29, after the numeral 10, I insert "projecting from the rear
of the arm 6," and in the next following line I alter "carrying” into
66 carries," and insert "which" before "enters." In line 34, after the
numeral 17, I insert the explanatory words, keyed on a rocking :
shaft 18." In page 4, at lines 9 to 11, I strike out the sentence com-
mencing "The same movement," and ending with the word "desired."
I also strike out the paragraph commencing at line 18, and ending at
line 20.
6
In the first claim at line 26 I strike out the words "or a shuttle if
desired," and in the third claim at line 33 I strike out the words " or
shuttle" after which the Specification will read as follows:-
The principle of this Invention, which relates to certain improve-
ments in sewing machines, having been described in my Provisional
Specification, I now proceed to describe fully the details thereof, for
which purpose I have annexed hereto Drawings which I now proceed to
.describe.

page_text: Fig. 1 is a side elevation of my improved machine for producing
single thread chain stitches; Fig. 3, an end elevation; Fig. 4, a trans-
verse section on the line A, B; and Fig. 2, a separate view of the
driving wheel.
In all Figures similar numerals are employed to denote similar
parts.
1 is a bed plate, having at one end a work plate 2 and at the other
a slotted upright 3, in and against which the slide 4 works truly and
vertically, being kept in place by the vertical pin 5. Upon the upper
end of the slide 4 is formed the curved arm 6, upon which is mounted
the needle 7, the reel holder S, and the tension screw 9. A stud 10,
projecting from the rear of the arm 6 carries a friction roller 11, which
enters the excentric groove 12 in the wheel 13 (see Fig. 2) which
revolves upon the stud 14 and is turned by the handle 15.
A truly
vertical motion is thus given to the needle 7 by the revolution of the
wheel 13. A pin 16 is fixed into the slide 4 (see Fig. 4), and enters
the slotted arm 17 keyed on a rocking shaft 18. When the pin 16 is
passing the rocking shaft 18 its close proximity to the said shaft 18
causes a very rapid motion of the arm 17 in a circular arc. Towards
the upper and lower extremities of its stroke the pin 16, being then at
a greater distance from the shaft, communicates a much slower circular
motion to the slotted arm 17; and for a short distance near its highest
position the pin 16 travels in the vertical portion of the slotted arm 17,
and therefore does not move it at all. This varying motion is exactly
suited to the functions of the hook 19, which is fixed upon the end of
the rocking shaft 18 and acts in concert with the needle 7 in forming
the chain stitch for which machines of this class are designed. The
second curved arm 20 has a rocking motion upon the horizontal centre
pin 21, which motion is derived from a small excentric 22 (see Fig. 2)
upon the wheel 13.
The bent portion 23 of the arm 20 embraces the
excentric 22, and the extent of motion is regulated by the screw 24
(see Fig. 4). The outer end of the curved arm 20 causes to reciprocate
the toothed feed bow or cloth presser 25, which is held upon the work
by the spring 26.
Having now described the nature of my Invention, and the manner
in which the same is performed, I desire it to be understood that without
limiting myself to the precise details herein-before described, I claim

page_text: as the Invention to be protected by the herein-before in part recited
Letters Patent,―
First. The method of actuating the hook 19, substantially as and for
the purpose herein-before described and illustrated in the accompanying
Drawings.
Second. The method of actuating the feed bow 25, substantially as
and for the purpose herein-before described and illustrated in the accom-
panying Drawings.
Third. Either or both of the aforesaid methods of actuating the hook
and the feed bow respectively, in combination with the method of 1
giving the needle 7 a truly vertical movement, substantially as and for
the purpose herein-before described and illustrated in the accompanying
Drawings.
In witness whereof, I, the said William Hall Pearson, have hercunto
set my hand and seal, the Seventeenth day of March in the
year of our Lord One thousand eight hundred and seventy-
six
1
I hereby grant my fiat, giving leave to the above-named William
Hall Pearson to file in the Great Seal Patent Office, with the Specifi-
cation to which the same relates, the above-written Disclaimer and
Memorandum. Dated this 27th day of May One thousand eight hundred
and seventy-six.
Temple.
JOHN HOLKER,
Attorney-General.

page_text: LETTERS PATENT to John Mountain, of Birmingham, in the County
of Warwick, Machinist, for the Invention of "CERTAIN IMPROVEMENTS
IN SEWING MACHINES."
Sealed the 21st December 1874, and dated the 23rd September 1874.
PROVISIONAL SPECIFICATION left by the said John Mountain at the
Office of the Commissioners of Patents, with his Petition, on the
23rd September 1874.
I, JOHN MOUNTAIN, of Birmingham, in the County of Warwick,
Machinist, do hereby declare the nature of the said Invention for
"CERTAIN IMPROVEMENTS IN SEWING MACHINES," to be as follows:-
This Invention relates to certain improvements in sewing machines.
On the base or stand is an upright pillar or support having a slot
in its centre. Two arms are connected to this stand or base by an
ordinary hinge or joint. In the above slot is a bar working freely

page_text: therein, and to which is secured one of the above arms by screws or
other contrivance. In in interior of the wheel is a groove, and upon
one of the said arms is a cam which engages with a peg and lifts the
other arm. The cloth presser works freely upon a pin on one of the
said arms and has a spring underneath so that it may retain its position.
The needle is held by one of the arms by means of a screw or other
contrivance. A hook is secured by a pin to the table but capable of
working freely.
Motion is imparted to the machine by turning the wheel, when the
cam engages with a peg and lifts one of the arms in a perpendicular
position, viz., sliding up the slot with the bar already described. The
said bar having a projection upon its far side forces out the other arm
horizontally, taking the cloth presser and cloth with it. The hook
catches the thread when the needle is up, being acted upon by the lever
in connection with the movement of the bar in the slot. Tension is
imparted to the thread by passing from the reel under a spring, having
at its end a ball regulated by an ordinary screw.
.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Mountain in the Great Seal Patent. Office
on the 20th January 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
MOUNTAIN, of Birmingham, in the County of Warwick, Machinist,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-third day of September, in
the year of our Lord One thousand eight hundred and seventy-four,
in the thirty-eighth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said John Mountain, Her
special licence, that I, the said John Mountain, my executors, ad-
ministrators, and assigns, or such others as I, the said John Mountain,
my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter

page_text: for the purpose herein-before described and illustrated in the accom-
panying Drawings.
In witness whereof, I, the said John Mountain, have hereunto
set my hand and seal, the Eleventh day of January, in the
year of our Lord One thousand eight hundred and seventy-
five.
JOHN MOUNTAIN. (L.S.)