IMPROVEMENTS IN DRAWING FRAMES FOR COTTON AND OTHER ANALOGOUS TEXTILE MATERIALS
Year: 1880

page_text: LETTERS PATENT to Walter Alfred Barlow, of 6, St. Paul's Churchyard,
London, Patent Agent and Engineer, for an Invention of "IMPROVEMENTS IN
DRAWING FRAMES FOR COTTON AND OTHER ANALOGOUS TEXTILE MATERIALS."
A communication from abroad by Charles Pfeiffer and Henri Offroy, both of
Paris, France.
PROVISIONAL SPECIFICATION left by the said Walter Alfred Barlow at the
Office of the Commissioners of Patents on the 13th October 1880.
WALTER ALFRED BARLOW, of 6, St. Paul's Churchyard, London, Patent Agent
and Engineer. "IMPROVEMENTS IN DRAWING FRAMES FOR COTTON AND OTHER
ANALOGOUS TEXTILE MATERIALS." A communication from abroad by Charles
Pfeiffer and Henri Offroy, both of Paris, France.
In the drawing of short filaments, and especially of cotton in drawing frames,
the beards of the fibre roll around the top leather covered cylinder, which is a
great inconvenience, and if care is not taken to stop the machine at once the
beards continue to accumulate, they cut the leather, and even strain the drawing-
rollers.
The object of this Invention is to obviate these inconveniences by very simple
mechanism in order to stop the drawing-frame as soon as beards roll around the
top cylinder.
The throwing out of gear is effected by means of an articulated lever, which
through its longer arm produces the stoppage of the drawing, the shorter arm
pressing on a tappet fixed upon the rod which supports the weight giving pressure
to the drawing-rollers.
When beards roll around the top cylinder the latter is raised to a height equal to
the thickness of the layer of accumulated beards, and lifts in its turn the pressure
weight, which is attached to the shaft of the said cylinder by means of a hook,
and also raises the aforesaid tappet, which is fixed or of a piece with the rod of the
weight, thus rocking the articulated lever, and the longer arm whereof will throw
the machinery out of gear. In the outer extremity of the tappet is a screw
threaded hole for carrying a screw, which will thus be capable of vertical
adjustment so as to be advanced nearer to or farther from the shorter end of the
articulated lever and thus regulates the speed of its action.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Walter Alfred Barlow in the Great Seal Patent Office on the
13th April 1881.
WALTER ALFRED BARLOW, of 6, St. Paul's Churchyard, London, Patent Agent
and Engineer. "IMPROVEMENTS IN DRAWING FRAMES FOR COTTON AND OTHER
ANALOGOUS TEXTILE MATERIALS." A communication from abroad by Charles
Pfeiffer and Henri Offroy, both of Paris, France.
In the drawing of short filaments, and especially of cotton in drawing frames,
the beards of the fibre roll around the top leather covered cylinder, which is a
great inconvenience, and if care is not taken to stop the machine at once the
beards continue to accumulate, and they cut the leather, and even strain the drawing
rollers.
The object of this Invention is to obviate these inconveniences by very simple
mechanism in order to stop the drawing frame as soon as beards roll around the
top cylinder.
The throwing out of gear is effected by means of an articulated lever, which
through its longer arm produces the stoppage of the drawing, the shorter one
pressing on a tappet fixed upon the rod which supports the weight giving pressure
to the drawing-rollers.
When beards roll around the top cylinder the latter is raised to a height equal to
the thickness of the layer of accumulated beards, and lifts in its turn the pressure
weight, which is attached to the shaft of the said cylinder by means of a hook, and
also raises the aforesaid tappet, which is fixed or of a piece with the rod of the
weight, thus rocking the articulated lever and the longer arm whereof will throw
the machinery out of gear.
screw,
In the outer extremity of the tappet is a screw threaded hole for carrying a
which will thus be capable of vertical adjustment, so as to be advanced
nearer to or farther from the shorter end of the articulated lever and thus regulates
the speed of its action.
In the following description will be found described the means by which the said
tappet may be regulated.
In the accompanying Drawings there is represented an application of this
Invention to a cotton drawing frame. It is evident that not only the form shown
in the Drawings of the different parts of the mechanism are to be claimed, but that
the Invention can be applied in a general manner to all drawing frames,
whatever may be the form or dimensions given to the rods carrying the pressure
weights.
Fig. 1 is a vertical section of the apparatus; Fig. 2, a front view.
Fig. 3, a side view; Fig. 4 shows the weight attachment.
Like letters of reference designate similar parts in all the Figures.
A is the top drawing cylinder covered with leather; B, the fluted drawing
cylinder; C, rod carrying the weight fixed by a book on the shaft of the
cylinder A. If desired one rod only may be fixed at both ends of this cylinder, as
shown in Fig. 2.
On this rod is fixed a square angle piece H carrying a screw F;
D is the weight which determines the pressure of the drawing cylinders; E is a
lever articulated at O and destined by the movement of its part K to produce the
stoppage.
The part E of this lever rests firmly against the extremity of the screw F, which
forms the tappet which has been referred to above, and the employment of a screw
permits of the regulation of the said tappet and of giving it the desired length.
With the said arrangement it is seen that by the beards rolling around the
cylinder A the latter is raised and lifts in its turn the rod C and the tappet F. The

page_text: arm E of the lever, which is actuated by the weight of the longer arm K, follows
the movement of the tappet and is the cause of the oscillation of the lever around
the point O, which oscillation stops the machine by throwing it out of gear.
Having now described the nature and particulars of the said Invention in such
wise that any one acquainted with this class of apparatus may readily carry the
same into practical effect, I claim,—
1st. The improvements in drawing frames operating by the utilization of the
thickness of the layer of accumulated beards around the top drawing cylinder for
the stoppage of the machine, as herein specified.
2nd. In apparatus herein described, the tappet regulated by means of a screw
fixed upon the rod which supports the weight giving pressure to the drawing
rollers, and against which screw rests the one arm of the articulated lever which
produces the stoppage of the machine, as herein described and shewn by the
Drawings.
3rd. The apparatus, as and for the purpose herein specified and described in
reference to and shown by the Figures of the accompanying Drawings.
In witness whereof, I, the said Walter Alfred Barlow, have hereunto set my
hand and seal, this Eleventh day of April, One thousand eight hundred
and eighty one.
Witness,
ALFRED E. WELSH,
79, Arthur Rd.,
North Brixton,
S.W.
WALTER A. BARLOW. (L.S.)