Improvements in Gassing Frames for Gassing Yarn, Thread, and the like.
Year: 1896

page_text: Date of Application, 13th May, 1896
Complete Specification Left. 3rd Sept. 1896 Accepted. 17th Oct. 1896
PROVISIONAL SPECIFICATION.
Improvements in Gassing Frames for Gassing Yarn, Thread, and
the like.
We GEO. SWINDELLS & SON LTD., of The Adelphi and Clarence Mills,
Bollington, in the County of Chester, Spinners and Doublers, and FREDERICK
JACKSON, of Clough Bank, Bollington, aforesaid, Secretary to the said Company,
do hereby declare the nature of this invention to be as follows:-
Our invention relates to improvements in gassing frames for gassing yarn, thread,
and the like and has for its object to increase the efficiency of such frames.
In gassing frames as at present in use the yarn to be gassed is carried by two
grooved pulleys the yarn being led from the underside of one pulley to the upper
side of the other pulley and so on back again to the first pulley. The yarn is thus
crossed midway between the two pulleys and beneath the point where the yarn
crosses, the burner is placed. In carrying pulleys containing four grooves the yarn
would thus be gassed eight times in its passage over the pulleys.
It has been found in practice that with a flame of moderate size the yarn is
insufficiently gassed and a large flaring flame is considered necessary for efficient
gassing. The drawbacks to the use of a large flame are many, entailing as it does
the danger of browning or singeing the yarn, and causing an undue emission of
smoke from the burning fibre highly detrimental from a sanitary point of view.
Moreover a large proportion of the flame is entirely wasted as it flares bigh above
the yarn in its passage through the flame of the burner.
The object of our invention is to remedy such defects.
In carrying our invention into effect we interpose between the two grooved
carrying pulleys a third grooved pulley and pass the yarn over and under this in a
similar manner to the other pulleys so that we obtain two crossing points of yarn
instead of one as formerly. We also employ a double burner, one burner at each
point of crossing of the yarn. It will be observed therefore that in our improved
gassing frame the yarn is gassed twice instead of once as formerly so that with
carrying pulleys formed with four grooves the yarn passes through the flame sixteen
times instead of eight.
We are therefore euabled to dispense with a large wasteful flame and by the
employment of two flames of moderate size, can not only more efficiently gas the
yarn but cau run the yarn through the frame at a greatly increased speed. As
the fibre is consumed at two points with a sinall Hame the emission of smoke
is greatly lessened if not entirely obviated.
Our improvement may be applied to existing gassing frames at a small outlay.
We do not confine ourselves to one additional gassing point, as in some cases if
considered desirable we might provide the gassing frame with more than one
additional carrying pulley in conjunction with the requisite number of burners.
Dated the 12th day of May 1896.

page_text: COMPLETE SPECIFICATION.
Improvements in Gassing Frames for Gassing Yarn, Thread, and
the like.
We GEO. SWINDELLS & SON LTD., of The Adelphi and Clarence Mills,
Bollington, in the County of Chester, Spinners and Doublers, and FREDERICK
JACKSON, of Clough Bank, Bollington, aforesaid, Secretary to the said Company,
do hereby declare the nature of this invention and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement and accompanying drawings:-
Our invention relates to improvements in gassing frames for gassing yarn, thread,
and the like and has for its object to increase the efficiency of such frames.
In gassing frames as at present in use, the yarn to be gassed is carried by two
grooved pulleys the yarn being led from the underside of one pulley to the upper
side of the other pulley and so back again to the first pulley. The yarn is thus
crossed midway between the two pulleys and beneath the point where the yarn
crosses, the burner is placed. In carrying pulleys containing four grooves, the
yarn would thus be gassed eight times in its passage over the pulleys.
It has been found in practice that with a flame of a moderate size the yarn is
insufficiently gassed and a large flaring flame is considered necessary for efficient
gassing. The drawhacks to the use of a large flame are many, entailing as it does
the danger of browning and singeing the yarn and causing an undue emission of
smoke from the burning fibre highly detrimental from a sanitary point of view.
Moreover a large proportion of the flame is entirely wasted as it flares high above
the yarn in its passage through the flame of the burner.
The object of our invention is to remedy such defects.
In carrying our invention into effect we interpose between the two grooved
carrying pulleys a third grooved pulley and pass the yarn over and under this in a
similar manner to the other pulleys so that we obtain two crossing points of yarn
instead of one as formerly. We also employ a double burner, one burner at each
point of crossing of the yarn. It will be observed therefore that in our improved
gassing frame the yarn is gassed twice instead of once as formerly so that with
carrying pulleys formed with four grooves the yarn passes through the flame sixteen
times instead of eight.
In order that our invention may be fully understood we have attached hereto a
sheet of explanatory drawings to which we will now refer.
In the said drawings Fig. 1. represents the old method of gassing yarns whilst
Fig. 2. shows our improved method. So much of a gassing frame is shown in the
drawings as is necessary to illustrate our invention. Referring in the first place
to Fig. 1. it will be seen that under the existing conditions the yarn a is led from
the bobbin under the grooved pulley b which is mounted to revolve in an adjustable
bracket and thence over the pulley e mounted in a similar bracket c' and partly
around the same and returned over and partly around the pulley being thus
crossed about midway between the two pulleys. The course of the yarn is indicated
by the arrows.
A burner d is placed beneath the point where the yarn crosses, the yarn passing
through the flame of the burner. When the yarn a has thus passed through the
flame of the burner a sufficient number of times it is wound upon a drum. Suppose
the yarn to be passed over the pulleys four times the yarn would thus be gassed
eight times in its passage through the flame.
Fig. 2. shows our improved arrangement in which we employ an intermediate
grooved pulley e mounted to revolve in an adjustable bracket e.
The yarn a is
passed over and under the intermediate pulley e as indicated so as to obtain two

page_text: crossing points of the yarn. A burner is disposed beneath each of these two
crossing points. In the drawings we show a two branch Bunsen burner which we
have found to be very suitable for the purposes of our invention securing as it does
perfect combustion of the gas.
Any form of double or single burner in general use suitable for gassing yarns
may however be employed.
It will be observed that under our improved arrangement the yarn is gassed
twice where formerly it was gassed once only and by passing the yarn over the
pulleys four times the yarn would be gassed sixteen times in its passage through
the flames.
By these means we can dispense with a large wasteful flame and by the employ-
ment of two flames of moderate size, we are enabled not only to gas the yarn more
efficiently but also to run the yarn through the frame at a greatly increased speed
and thus materially increase the output. As the fibre on the yarn is consumed at
two points with small flames the emission of smoke is greatly lessened if not
entirely obviated. It has been moreover found in practice when using our
invention that the burning fibres of the yarn in its passage from one burner to the
other, are not extinguished by the slight contact with the top and bottom of the
intermediate pulley, and this contributes in great measure to the efficiency of our
improved gassing frame. Formerly the yara after passing through the flame of
the burner was passed almost entirely around the pulleys and this had the effect of
extinguishing the burning fibre. The fibre of the yarn being thus partially
carbonised did not readily ignite when again passed through the flame and inefficient
gassing consequently resulted.
Under certain circumstances it may be found desirable to provide more than one
additional carrying pulley and thus obtain more than two crossing points of the
yarn, each crossing point being in such case provided with a suitable burner.
Our invention may be adapted to existing gassing frames at a small outlay.
Having now particularly described and ascertained the nature of our inveu-
tion and in what manner the same is to be performed we declare that what we
claim is.
1. The improved gassing frame for gassing yarns, thread and the like constructed
and arranged substantially as described and shown with reference to Fig. 2. of the
drawings.
2. In gassing frames of the indicated nature the combination of the intermediate
pulleys e with the double burners d or their equivalents, arranged and acting for
the purposes and substantially as described and shown with reference to Fig. 2. of
the drawings.
3. In gassing frames of the indicated nature crossing the yarn at two or more
points in its passage across the frame and gassing the yarn at such points sub-
stantially as described and shown.
Dated this 2nd day of September 1896.