Improvements in Screw-gill Machinery for Operating upon Fibrous Material.
Year: 1892

page_text: Date of Application, 20th Aug., 1892
Complete Specification Left, 23rd May, 1893-Accepted, 24th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in Screw-gill Machinery for Operating upon Fibrous
Material.
We, JOHN CHARLES WALKER and JONATHAN EDWARD STEPHENSON, both
trading as John Perry, of Shipley Fields Mill Shipley, in the County of York,
Machine Maker, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in both that type of screw-gill boxes or
machines for operating upon fibrous material in which screws of increasing pitch
are used to traverse the gills or fallers and also that type of machine in which
"intersecting" gills or fallers are employed that is an inverted set of gills or fallers
arranged in co-operation with the ordinary gills.
That part of our invention relating to machines in which screws of increasing
pitch are employed consists in the arrangement hereinafter described whereby the
fibres after being loosened and opened out are passed in a loose condition on to a
second set of gills operated by the same screws to straighten out and clean the
fibres.
For this purpose we form a double thread which may be of even pitch on the
latter portion of the screws of increasing pitch and operate thereby a second set of
gills or fallers. This double thread only commences after the fibres have been
opened out or loosened sufficiently to enable them to be advantageously treated by
a more finely pinned or closely arranged set of fallers and these latter fallers may
be sufficiently numerous to approximately hold the full length of the fibres operated
upon.
An intermediate set of fallers may be introduced operated by double threads of
increasing pitch on the same screws.
Or in certain cases an intermediate set of fallers operated by even pitch screws
may be introduced between two sets of fallers operated by increasing pitch screws
and the portions of the screws operating the latter sets of fallers may have two or
more threads.
The object of the second part of our invention is to obviate the difficulty of
cleaning the gills or fallers of intersecting machines.
We
For this purpose we mount the inverted set of fallers in an independent framc
capable of being readily detached from the machine and bodily raised or turned
aside so as to give ready access to both sets of gills for cleaning purposes.
may mount said frame between vertical guides and raise it by screws on either side
geared together. And we may provide a device to prevent the parts being returned
to their working position unless the screw gearing of each set is relatively in its
true position. This device may consist of a disc on each of the connecting wheels
one of which has a projection on its periphery the other a depression to allow it
to pass.
For feeding short fibres we may use a "shell" feed.
1
A
1000
DRACUP & NOWELL,
Bradford, Agents.

page_text: Improvements in Screw-gill Machinery for Operating upon Fibrous
Material.
We, JOHN CHARLES WALKER and JONATHAN EDWARD STEPHENSON both
trading as John Perry, of Shipley Fields Mill, Shipley, in the County of York,
Machine Maker, 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 :-
This invention relates to improvements in that type of screw-gill boxes or
machines for operating upon fibrous material in which " 'intersecting" gills or
fallers are employed that is to say an inverted set of gills or fallers arranged in
co-operation with the ordinary gills and the object of our invention is to make the
gills more accessible so as to obviate or reduce the present difficulty of cleaning
the gills or fallers of intersecting machines.
For this purpose we mount the inverted set of fallers in an independent frame
capable of being bodily raised or turned aside so as to give ready access to both
sets of gills for cleaning purposes.
A convenient arrangement for this purpose is illustrated in the accompanying
sheet of drawings forming a part of this Specification in which similar letters of
reference indicate corresponding parts in each of the figures.
Figure 1, represents an end elevation partly in section of such parts of an
intersecting gill box as are necessary to illustrate the application of our improve-
ments. Figure 2, is a side view of the same. Figure 3, is a view of a detail
hereinafter referred to.
The side frames A, A and the screws B, B for the lower set of gills C, C and
the screw and guide blocks D, D in which they are mounted are of any ordinary
construction. The upper set of gills E, E and screws F, F are mounted in similar
screw and guide blocks G, G but instead of being permanently fixed on the top
of D, D they merely rest thereon and are connected together by the cross
pieces H, H so as to form a detachable frame capable of holding the upper set of
gills and screws. The guides or spring fingers for guiding the upper set of gills or
fallers E, E from one pair of screws to the other are preferably fixed to the cross
pieces H, H but it has not been deemed necessary to show these in the drawings as
they are of ordinary construction.
Standard guides J, J are secured on each side of the gill-box to the outer face
of the blocks D, D, and guide pieces K, K are formed on each of the upper
blocks G, G fitting these standards. A lug L is also formed on each of the
blocks G having a female screw thread formed or fixed therein fitting the screws M
mounted in each of the standards J. The screws M have an upper bearing in the
cross bar N connecting the tops of the standards J. Mitre wheels O, O are fixed
on the tops of the screws engaging mitre wheels P, P fixed on the cross shaft Q
mounted in bearings R secured upon the cross bar N.
A hand lever S or other device is provided by which to rotate the shaft Q and
thus turn the screws M through the medium of the mitre wheels and thereby bodily
raise the upper set of fallers and the framework in which they are mounted to the
position represented by the broken lines.
When the upper set of fallers are lowered to their working position to insure the
gear wheels T, T connecting the top screws of the lower set to the bottom screws
of the upper set being replaced so as to engage each other as before the discs U, U
are keyed upon the shanks of the screws. One disc of each pair is provided with a
projection on its periphery whilst the other disc has a corresponding recess W
so arranged, that when the screws B and F are turned to their proper relative
position the projection V passes into the recess W as the screws are rotated.
But in case the screws are not in proper relation to each other the projection V

page_text: does not meet W and the screws are consequently prevented from revolving.
Figure 3, represents a pair of the discs with the screw shanks in section and the
right-hand side of Figure 1 is shown in section on the broken line a, b Figure 2 so
as to show these discs.
Instead of raising the framework containing the upper gills and screws it may be
hinged at one side and mechanical means may be provided to raise the other side
so as to expose both sets of gills.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
1. In an intersecting screw gill box, mounting the upper set of gills in an
independent framework capable of being bodily raised or moved aside to give
more ready access to the two sets of gills, substantially as herein shown and
described.
2. The combination with the screws of an intersecting gill box of the discs U,
substantially as herein shown and described.
D1 M. 1902
DRACUP & NOWELL,
Bradford, Agents.