IMPROVEMENTS IN SEWING MACHINES, SHUTTLES FOR THE SAME, AND BOBBINS FOR THE SAME
Year: 1875

page_text: PROVISIONAL SPECIFICATION left by Walter Alfred Blake and George
Moss at the Office of the Commissioners of Patents, with their
Petition, on the 10th March 1875.
We, WALTER ALFRED BLAKE, of Grange Road, Bermondsey, in the
County of Surrey, Sewing Machine Manufacturer, and GEORGE Moss,
of Rolls Road, Bermondsey, in tho County of Surrey, Machinist, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
SEWING MACHINES, SHUTTLES FOR THE SAME, AND BOBBINS FOR THE SAME," to be as
follows:-
The Invention relates, firstly, to a new method of sewing by machinery,
whereby a perfect stitch is made by each to-and-fro motion of the
shuttle or other instrument carrying the bottom thread. In existing
shuttle sewing machines the shuttle must necessarily pass and repass
the needle to make one stitch. By this Invention these two motions of
the shuttle to make one stitch are superseded, and a perfect stitch is
made by each passage of the shuttle or other instrument carrying the
bottom thread, the first stitch being made by the motion of the shuttle
or other instrument in the one direction, the next stitch being made by
.

page_text: its return motion in an opposite direction to the first and so on in
succession.
The Invention relates, secondly, to a new description of sewing machine
shuttles made in one or more parts, which wo mako with both ends
pointed.
The Invention relates, thirdly, to a new mode of operating the feed
and the stitch regulator, thereby obtaining a silent feed at any length of
stitch, the feed standing vertically upon the feed cam, the said feed
having a slot from nearly the top to nearly the bottom, which said slot
is in a parallel line with the feed cam shaft or spindle. The said slot has
a pin or stud passed through it and fixed in a lever, which said lever lies
horizontally across the machine at a right angle to the feed cam shaft by
the side of the said vertical feed, the said pin or stud in the slot of the
said vertical feed forming a centre upon which the feed oscillates; by
pressing the said lever or stitch regulator the stitch is lengthened and
by raising the said lever the stitch is shortened; the bottom of the said
feed is always pressed against the feed cam by means of a spring.
The Invention relates, fourthly, to the application in sewing machines.
of a slide bar, which stands parallel to the needle bar, upon which slide
bar the needle cam moves up and down and is fitted to prevent the side 2
oscillation of the needle cam.
The Invention relates, fifthly, to a new mode of raising and lowering
the presser foot, which is effected by the means of an inclined plane and
oscillating slide which is attached to the end of the arm of machine by
the side of the presser foot bar so as to slide to and fro, the foot bar having a
a fixed pin or stud projecting under the said stud the oscillating inclined
plane slide moves. By pulling the said slide the presser foot is raised,
and by pushing it back the presser foot is lowered, and by pressing
down the said oscillating inclined plane slide the presser foot is raised and
by drawing the slide and then pressing it down the foot is turned partially 3
round.
The Invention relates, sixthly, to the application of wood, horn, bone,
and ivory, for use in sewing machines for the purpose of wheels or teeth
of wheels for the purpose of obtaining silence in working.
The Invention relates, seventhly, to the mode of attaching india-rubber 3
rings on the feet or stand, which is accomplished by stretching the rings

page_text: over bevilled or grooved pegs which are under the feet, or stand in such
a position as will prevent the rings slipping off.
The Invention relates, eighthly, to a new mode of winding sewing
machine shuttle reels or bobbins, and for the manner in which the
said reels or bobbins are made. The said reels have a small toothed
wheel or pinion fixed at one or both ends, into which said pinion a larger
wheel runs to drive round the said reels for the purpose of winding the
said reels.