IMPROVEMENTS IN SCREW GILL BOXES FOR PREPARING WOOL AND OTHER FIBROUS SUBSTANCES
Year: 1880

page_text: LETTERS PATENT to Thomas Whitley, of Halifax, in the County of York, for
an Invention of "IMPROVEMENTS IN SCREW GILL BOXES FOR PREPARING
WOOL AND OTHER FIBROUS SUBSTANCES."
nt
PROVISIONAL SPECIFICATION left by the said Thomas Whitley at the
Office of the Commissioners of Patents on the 31st May 1880.
THOMAS WHITLEY, of Halifax, in the County of York. "IMPROVEMENTS IN
SCREW GILL BOXES FOR PREPARING WOOL AND OTHER FIBROUS SUBSTANCES.'
This Invention has reference to that class of machine employed in treating or
preparing wool and other fibrous substances known as screw gill boxes, and in
which there are usually employed two top screws for travelling the fallers.
Our improvements consist in employing (by preference) eight top screws formed
in one or two barrels or shafts, the threads of each screw being of different pitch to
the other, by which means a draught is obtained between each screw.
The fallers to be actuated by the first screw near to the back roller has less pins
set in than the screw next succeeding to it, and the second screw has less pins than
the third, and the third less than the fourth, so that wool passing through a
machine constructed in the manner above named is subject to five different draughts
and four different sets or pitch of pins, thereby preparing the wool in one operation
far more than can be accomplished in an ordinary screw gill box as at present con-
structed. Intersecting fallers are employed to work in combination with the above
named screw gills.
Instead of four screws, six or more may be used with draughts, pitch of pins,
and screws in proportion.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thomas Whitley in the Great Seal Patent Office on the 30th
November 1880.
"IMPROVEMENTS IN
THOMAS WHITLEY, of Halifax, in the County of York.
SCREW GILL BOXES FOR PREPARING WOOL AND OTHER FIBROUS SUBSTANCES."
This Invention has reference to that class of machine employed in treating or
preparing wool and other fibrous substances, known as "screw gill boxes," and in
which there are usually two top screws for travelling the fallers.
My improvements consists in employing (by preference) three or four sets of
fallers and six or eight top screws, formed in two or more barrels or shafts, the
thread of each screw being of different pitch to the other, by which means a draft
is obtained between each set of fallers.
The fallers to be actuated by the first screws near to the back roller has less pins
set in than the fallers next succeeding to them, and the second fallers has less pins
than the third, and the third less than the fourth, so that wool passing
through a machine constructed in the manner above named is subject to five
different drafts and four different sets or pitch of pins. Intersecting fallers are
employed to work in combination with the above named screw gills.
In order that the Invention may be better understood, I herein give reference to
the accompanying Sheet of Drawings, which is a longitudinal section of part of a
screw gill box having my improvements applied thereto, and which will be readily
understood by those conversant with the trade. The first two top screws A and B
are cut or formed in one barrel, and the succeeding two screws C and D are cut or
formed in another barrel. Each screw is supplied with a set of fallers, and each set
of fallers have a different number of pins fixed into them for purposes hereinafter
explained. E, F, G, H, are the bottom screws, and motion is communicated to such
screws and fallers by gear wheels; I being the first motion shaft, which, by means
of bevil wheels J, turns the bottom screws H and G, and by spur wheels K the top
screws A and B are driven.
Motion is communicated to the bottom screws E and F through the medium of
stud wheel L, wheel M, shaft N, and other wheels O, which by means of wheels P
the top screws C and D driven.
It will be seen that the speed of each pair of screws can be regulated indepen-
dantly of the other pair, and that by change wheels the speeds of both pairs of
screws can be regulated as and when required, according to the class of wool or other
fibre under operation. Between the feed rollers R and delivery rollers S the wool
:-The
is subjected to five different drafts, obtained in the following manner :-
first draft is obtained between the feed rollers R and fallers A¹, the second draft is
obtained between the fallers A¹ and B¹, the third draft between the fallers B' and C¹,
the fourth draft between the fallers C¹ and D¹, and the fifth draft is obtained
between the fallers D' and delivering rollers S; and in order that the wool may be
more effectually worked, the pins in the fallers are of different strength and pitch,
the fallers A' having the least number of pins, and the number increasing in each
succeeding set of fallers, so that the fallers D¹ and T have the greatest number of
pins. Intersecting fallers T are employed for preventing the wool rising out of the
pins in the fallers D', and also in order to lessen the space between the roller S
and fallers D', the screws U and V being driven by the gearing W, X, from the
screw shaft Z. By this arangement of screws and fallers the wool or other fibre is
worked or prepared by once passing through the machine in a manner which
cannot be accomplished by a screw gill box as at present constructed.
Although I have shewn and described a machine having four sets of fallers
operated by eight top screws, it will easily be understood that three, five, six, or
more sets of screws and fallers may be employed.

page_text: The screws are arranged to work in a line with each other, and not one outside
the other.
Having thus described the nature of the said Invention, and shewn by the
accompanying Drawings, how the same is to be performed or carried into practical
effect, I would have it understood that I do not confine myself to the precise
details of construction or arrangement of the machine or apparatus herein shown
and described, as for instance, three sets of screws and fallers may be used, but
what I do claim is,―
Firstly. The combination and arrangement of the parts herein shewn and
described, whereby three, four, or more sets of fallers are employed, actuated by six,
or eight, or more top screws.
Secondly. The combination and arrangement of the parts shewn and described,
whereby four, five, or more drafts may be obtained between the feed rollers and
delivery rollers.
Thirdly. The combined use and employment of fallers having pins of different
pitch, for the purpose substantially as herein shewn and described.
In witness whereof, I, the said Thomas Whitley, have hereunto set my hand
and seal, this Twenty-seventh day of November, in the year of our Lord
One thousand eight hundred and eighty.