IMPROVEMENTS IN SEWING MACHINES
Year: 1881

page_text: LETTERS PATENT to Herbert John Haddan, of Kensington, Middlesex, for
an Invention of "IMPROVEMENTS IN SEWING MACHINES." A communication
from abroad by D'Arcy Porter and Thomas H. White, both of Cloveland,
United States of America.
COMPLETE SPECIFICATION filed by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 26th November 1881.
HERBERT JOHN HADDAN, of Kensington, Middlesex. IMPROVEMENTS IN
SEWING MACHINES." A communication from abroad by D'Arcy Porter and
Thomas H. White, both of Cleveland, United States of America.
"
This Invention relates to sewing machines, and consists in a mechanical move-
ment which converts the rotary motion of the main horizontal driving shaft of a
sewing machine into a vibrating motion for operating the shuttle bar, and by the
interposition of other mechanism at the same time communicates rotary motion to
the feed shaft.
In the Drawings Fig. 1 is a view in front elevation of a portion of a sewing
machine constructed according to this Invention, and Fig. 2 is an end view of the
Bame.
In the said Drawings A represents the standard of an ordinary sewing machine
adapted to hold and support the operative parts of this device as a frame. B repre-
sents the main horizontal driving shaft, which is provided with a crank B¹. Upon
the crank B' is adapted to turn the lever C; this lever C is pivoted at its lower
end to the crank E' upon the feed shaft E. The lever C is also provided with a
radius bar C, which oscillates upon the stationary shaft C, and is pivotally
attached to the lever C at c. Now as the horizontal shaft B is revolved a rotary
motion is communicated to the shaft E through the lever C.
To the crank B' is also attached the lever D by means of a yoke and slot D';
this lever D is pivoted at D², while its lower end is pivotally attached to the
shuttle-bar F.

page_text: Now as the main horizontal shaft B is revolved the crank B¹ moves in the slot in
yoke D' of the lever D, and as the latter is pivoted at Da vibrating motion is given
to tho bar D, and the same motion is communicated to the shuttle-bar F.
By this Invention by the use of a single crank upon the main horizontal driving
shaft of a sowing machine a vibrating motion is given to the shuttle bar and a
rotary motion to the feed shaft.
It is apparent that the same movement can be produced in the lever C if the
lover was slotted at small c and the pivot e permanently attached to the frame A
as is produced by the use of the radius-bar C₁, shown in the Drawings.
Having thus described this Invention, what I claim is,―
1st. The combination with the main horizontal driving shaft of a sewing machine
of a crank upon said shaft to which are attached two levers, one adapted to rotate
the feed shaft by the interposition of a radius bar or equivalent mechanism, while
the other communicates a vibrating movement to the shuttle-bar, substantially as
and for the purpose shown and described.
2nd. In a sewing machine the combination of the main driving shaft B,
crank B', lever C, radius-bar C¹, crank E³, and shaft E, with the lever D provided
with the yoke Di and shuttle bar F, substantially as and for the purpose shown
and described.
In witness whereof, I, the said Herbert John Haddan, have hereunto set
my hand and seal, this Twenty fifth day of November, A.D. 1881.