IMPROVEMENTS IN SEWING MACHINES
Year: 1875

page_text: PROVISIONAL SPECIFICATION left by Henry Joseph Petit at the
Office of the Commissioners of Patents, with his Petition, on the
10th February 1875.
;
I, HENRY JOSEPH PETIT, of Brussels, in the Kingdom of Belgium,
Manufacturer, do hereby declare the nature of my said Invention for
"IMPROVEMENTS IN SEWING MACHINES," to be as follows:-
This Invention relates to that class of sewing machines in which
certain parts of the mechanism, such for example, as the needle bar,
presser foot, and feeder have imparted to them a relative rotatory
motion, whereby the necessity for moving the material in working and
embroidering in any pattern with the chain stitch is obviated since the
parts of the machine themselves follow the desired outline simply by
the act of working the crank placed under the table of the machine.
The Invention consists of a peculiar combination of parts by means of:
which this principle which has hitherto been applied to embroidering
machines only, may be carried out with sewing machines in general so
as to obtain a feed in every direction, also to embroider with either
the chain stitch or the plain or quilting stitch upon the braid, and it

page_text: may be applied to an embroidering machine, chain stitch, single or
double thread, or shuttle machines, or to sewing machines of any other
description.
This improved combination of parts also admits of embroidering with
the chain stitch upon the braid being effected by bringing the braid
below the cloth plate of the machine, and of embroidering with the
quilting stitch upon the braid by bringing the latter from above the
overhanging arm of the machine.
In carrying out this Invention as applied to embroidering machines,
for example, a bobbin carrying the braid is placed upon a holder upon
the arm of the machine, from which bobbin the braid passes along the
whole length of the needle bar, is fed under the needle, and issues from
a braider below, the function of which latter consists in remaining
continually upon the material so as to cause the needle to descend
invariably through the centre of the braid in every direction.
On the needle bar, to the lower extremity of which the needle is
screwed, there is formed a flat side throughout its whole length along
which the braid is passed. A. tube or spindle is provided which receives
rotary motion from gearing, and turns the whole of the mechanism of
the arm of the machine, and simultaneously therewith the bobbin, which
receives motion from a spindle carrying a toothed wheel which gears
into another wheel placed upon the tube or driving spindle before-
mentioned. As this spindle is connected with mitre pinions placed
inside the hollow arm which are in communication with the working
crank, it is evident that the whole of the parts of the machine turn in the
same direction as the feed. The braid passes through the centre of
the driving spindle and issues from the braider fitted to the lower
extremity of this spindle, which is provided with a flat surface as before-
mentioned.
In the interior of the hole bored in the braider there is fitted a small
flat piece which bears upon the said flat surface, and the braider is
consequently caused to turn with the driving spindle in every direction.
A spring is also provided which continually presses the braider upon the
material.
To the overhanging arm of the machine there is fixed a support
carrying a toothed wheel which gears into another wheel fitted to the
end of the spindle actuating the braid bobbin, which arrangement

page_text: enables the braid bobbin attached to its holder to turn in any desired
direction by means of the crank before-mentioned.
The thread is wound upon a bobbin which is placed upon the needle
bar and turns by the motion of the other parts; the thread from the
bobbin passes through the centre of the tube or driving spindle and
issues by a hole to the needle.
A. plate disposed in the table of the machine is fitted with the sewing
mechanism which is driven by a mitre pinion, which gears into another
mitre pinion placed at one extremity of a spindle, the other end of which
carries a toothed wheel gearing into another toothed wheel fixed upon a
slotted tube. This tube is provided in its interior with a rod which
carries a pin working in a helical groove cut in another tube carrying
on its extremity a mitre pinion, which gears into another pinion mounted
on a vertical tube. Upon this tube is fixed a pin working in a slot
formed in a pivotted plate which carries the hook or looper, whereby a
to-and-fro motion is imparted to the latter, thereby causing it to lay hold
of the loop formed by the needle.
When it is desired to make the chain stitch upon the braid the braid
bobbin is carried by an arm connected by gearing with the actuating
gear below the table of the machine. The braid passing through a hole
formed in a plate which is fitted beneath the hook or looper mechanism
issues under the material placed on the cloth plate.
When it is required to sew with two threads a thread bobbin is
substituted for the braid, the thread from which bobbin passes to the
hook or looper and issues upon the cloth plate.
The thread from the thread bobbin firstly herein-before mentioned
interlocks with the lower thread, and a double thread chain stitch is
formed under the cloth, this stitch is made at each stroke by the thread
of the needle which passes through a needle plate and turns in a hole
formed in the centre of the fixed cloth plate, this needle plate is moved
in any direction in a similar manner to the other parts.