IMPROVEMENTS IN WAXED THREAD SEWING MACHINES
Year: 1876

page_text: PROVISIONAL SPECIFICATION left by Alfred Christmas Andrews at the
Office of the Commissioners of Patents on the 20th January 1876.
_ALFRED CHRISTMAS ANDREWS, of Birmingham, in the County of Warwick.
"IMPROVEMENTS IN WAXED THREAD SEWING MACHINES."
I first provide two points or hubs which are fixed on the top of the shuttle race,
one or both of which are affixed to a slide, and by suitable mechanical arrangements
are caused to feed the work under the needle the required distance; these points
are also permitted to form an opening between them for the free passage of the
needle which works through the deepest part of the channel or groove formed in
the usual manner for the reception of the bottom thread.
The shuttle race is inclined at a suitable angle or radius from its base to meet
the different forms of channeling now in use, some of which are cut at a more
acute angle than others, thus throwing the bottom of the channel a greater or less
distance from the edge of the sole of the boot, while the needle having to pierce the
welt (or middle sole) at an uniform distance from the edge of the upper, and the
edge of the sole respectively makes this arrangement necessary to admit of the
placing of the placing of the bottom of each stitch at the bottom of the channel.
The arrangement for opening the loop of the top thread for the free passage of
the shuttle carrying the bottom thread is as follows:-A suitably pointed and
shaped piece of metal actuated in any convenient manner enters a slot in the
needle, or where no slot is used between the needle and its thread immediately
above the short groove, and is made to travel a certain distance at right angles
thereto, forming as it does so an open loop for the shuttle to pass through, and
thus skipping or missing a stitch is impossible; this is found to be a necessity
where hard wax is used.
"
The wax or waxed thread may be heated in any suitable manner to a plastic
state for working.
My improved presser foot stands at right angles to the feed, and is so constructed
as to allow the stitches to be placed close to or at the required distance from the
edge of the upper, the said upper being protected from injury by a very thin sheet
of metal carried on the end of the said presser foot.
[Price 2d1

page_text: I construct an improved shuttle for using hard waxed thread therefrom; it
consist on its bottom side of a long roller (where the single bar is now used), and
one or more rollers on its top side, and in the place of the usual tension holes the
required tightness is obtained and regulated by a pressure spring and set screw;
the wax on the shuttle thread is heated previous to working in any suitable 5
manner.

page_text: PROVISIONAL SPECIFICATION left by Alfred Christmas Andrews at the
Office of the Commissioners of Patents on the 20th January 1876.
ALFRED CHRISTMAS ANDREWS, of Birmingham, in the County of Warwick.
"IMPROVEMENTS IN WAXED THREAD SEWING MACHINES."
I first provide two points or hubs which are fixed on the top of the shuttle race,
one or both of which are affixed to a slide, and by suitable mechanical arrangements
are caused to feed the work under the needle the required distance; these points
are also permitted to form an opening between them for the free passage of the
needle which works through the deepest part of the channel or groove formed in
the usual manner for the reception of the bottom thread.
The shuttle race is inclined at a suitable angle or radius from its base to meet
the different forms of channeling now in use, some of which are cut at a more
acute angle than others, thus throwing the bottom of the channel a greater or less
distance from the edge of the sole of the boot, while the needle having to pierce the
welt (or middle sole) at an uniform distance from the edge of the upper, and the
edge of the sole respectively makes this arrangement necessary to admit of the
placing of the placing of the bottom of each stitch at the bottom of the channel.
The arrangement for opening the loop of the top thread for the free passage of
the shuttle carrying the bottom thread is as follows:-A suitably pointed and
shaped piece of metal actuated in any convenient manner enters a slot in the
needle, or where no slot is used between the needle and its thread immediately
above the short groove, and is made to travel a certain distance at right angles
thereto, forming as it does so an open loop for the shuttle to pass through, and
thus skipping or missing a stitch is impossible; this is found to be a necessity
where hard wax is used.
The wax or waxed thread may be heated in any suitable manner to a plastic
state for working.
My improved presser foot stands at right angles to the feed, and is so constructed
as to allow the stitches to be placed close to or at the required distance from the
edge of the upper, the said upper being protected from injury by a very thin sheet
of metal carried on the end of the said presser foot.
[Price 2d1

page_text: I construct an improved shuttle for using hard waxed thread therefrom; it
consist on its bottom side of a long roller (where the single bar is now used), and
one or more rollers on its top side, and in the place of the usual tension holes the
required tightness is obtained and regulated by a pressure spring and set screw;
the wax on the shuttle thread is heated previous to working in any suitable
manner.