IMPROVEMENTS IN SEWING MACHINES
Year: 1881

page_text: .
LETTERS PATENT to John Clayton Mewburn, of 169, Fleet Street, in the City
of London; Patent Agent and Consulting Engineer, for an Invention of
IMPROVEMENTS IN SEWING MACHINES." A communication from abroad by
Edmond Antoine, of Fourmies, France.
"
PROVISIONAL SPECIFICATION left by the said John Clayton Mewburn at
the Office of the Commissioners of Patents on the 14th January 1881.
JOHN CLAYTON MEWBURN, of 169, Fleet Street, in the City of London, Patent
Agent and Consulting Engineer. "IMPROVEMENTS IN SEWING MACHINES."
[A communication from abroad by Edmond Antoine, of Fourmies, France.]
This Invention has reference more particularly to sewing machines which have
a circular action of the presser foot so as to allow of moving the work in all
directions, and it consists in constructing the machines so that heat can be applied.
to the shuttle thread.
Hitherto waxed threads could only be employed in ordinary machines with a
straight action, that is to say, which could move the work in only one direction,
but by means of this Invention waxed threads can be employed in machines of
any construction. The means employed for heating the shuttle thread consist of a
tube or channel for conveying the heat from any suitable source directly into the
box in which the shuttle is lodged. The necessary heat can be produced by a gas
jet, spirit lamp, candle, or otherwise, and may be conveniently conveyed to the
shuttle chamber by a channel cast with the shuttle race. This channel may be
bell mouthed at the end which comes above the gas jet or other heating agent,
and an orifice at the other end of the channel allows the hot air and products of
combustion to escape into the shuttle chamber.
For some descriptions of work it has hitherto been necessary to employ two
distinct machines, one, for example, having a circular action and the other with a
straight action for using a waxed thread; but by means of my Invention one
machine will do the work of both.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Clayton Mewburn in the Great Seal Patent Office on the
12th July 1881.
JOHN CLAYTON MEWBURN, of 169, Fleet Street, in the City of London, Patent
Agent and Consulting Engineer. " IMPROVEMENTS IN SEWING MACHINES."
(A communication from abroad by Edmond Antoine, of Fourmies, France.)
This Invention has reference to sewing machines which have a circular action
of the presser foot, so as to allow of moving the work in all direction, and it
consists in constructing the machines so that heat can be applied to the shuttle
thread.
Hitherto waxed threads could only be employed in ordinary machines with a
straight action, that is to say, which could move the work in only one direction.
The means employed for heating the shuttle thread consist of a tube or channel
for conveying the heat from any suitable source directly into the box in which the
shuttle is lodged. The necessary heat can be produced by a gas jet, spirit lamp,
candle, or otherwise, and may be conveniently conveyed to the shuttle chamber by
a channel cast with the shuttle carrier. This channel may be, bell mouthed at the
end which comes above the gas jet or other heating agent, and an orifice at the
other end of a channel allows the hot air and products of combustion to escape
into the shuttle chamber.
For some descriptions of work it has hitherto been necessary to employ two
distinct machines, one, for example, having a circular action and the other
a straight action for using a waxed thread; but by means of this Invention one
machine will do the work of both.
The annexed Drawing shews how the Invention may be carried out. A is the
support of the shuttle carrier; B, the shuttle carrier; C, the shuttle chamber or
box; G, the frame of the machine; D is a tube lodged in the shuttle carrier. At
the end D' this tube is bell mouthed, and below it is a gas flame E or other heating
agent. The hot air and products of combustion pass from the tube D into the
chamber C by an orifice at d.
Having now described the nature of the said Invention as communicated to me,
and in what manner the same is to be performed, I declare that I claim,-
Constructing sewing machines of the kind herein referred to with means of
heating the shuttle thread, substantially as hereinbefore described.
In witness whereof, I, the said John Clayton Mewburn, have hereunto set
my hand and seal, this Ninth day of July, One thousand eight hundred
and eighty one.
J. C. MEWBURN. (L.S.)