IMPROVEMENTS IN WET-SPINNING FRAMES
Year: 1885

page_text: [Communicated from abroad by Messieurs Polydore Haillez and Leon George
Delandtsheer, both of the Société Linière Gantoise, Ghent, in the Kingdom of
Belgium, Engineers.]
I, ARTHUR WILLIAM LOVELL REDDIE of the Office for Patents, 6 Bream's
Buildings, Chancery Lane in the County of Middlesex, Patent Agent, do hereby
declare the nature of the invention for IMPROVEMENTS IN WET-SPINNING FRAMES
to be as follows:-
The object of the present invention is to maintain constant the position of the
nip of the front drawing rollers in wet spinning frames notwithstanding variations
in their size and to ensure the proper distribution of pressure on the front and
back drawing rollers notwithstanding the decrease in diameter of the front drawing
rollers due to refluting and wear and tear and the altered position of their axes.
To this end the invention consists in guiding the axles of the front pressing
rollers of wet spinning frames in a line perpendicular or nearly so to the line of
travel of the sliver, for which purpose the saddle bushes are fitted to move in
guide-ways or slots in the ends of bracket arms or supports carried from the beam ;
and in so constructing and mounting the saddle itself that its position may be
readily adjusted to suit the altered diameter of the front drawing roller and the "
consequent change of position of its bearing bushes in the said guide ways
or slots.
For this purpose the saddle may be cranked so that the pressure may be applied
at or near a point on a line cutting the axes of the front and back drawing rollers
or by making the bearing bushes of the front drawing roller adjustable so that the
angle at which the pressure acts on the saddle will be practically constant, and be
proportionately distributed upon the axles of the front and back rollers whether
the front drawing rollers be of large or small diameter.
The saddle is adjustably connected with the block which bears against the axle
of the back drawing rollers, and a screw is provided for locking it securely in its
set position.

page_text: Improvements in Wet Spinning Frames.
I, ARTHUR WILLIAM LOVELL REDDIE of the Office for Patents, 6 Bream's
Buildings, Chancery Lane in the County of Middlesex, Patent Agent, 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: —
The object of the present invention is to maintain constant the position of the
nip of the front or top pressing rollers of wet spinning frames, notwithstanding
the reduction of their diameter, due to the wear and tear and refluting of the same,
and also to ensure the maintenance of the proper distribution of pressure on the
front and back pressing rollers.
In the accompanying drawings, Fig. 1 shews a side view of the top and bottom
rollers of a wet spinning frame, and of the saddle with its support and guide:
Fig. 2 is a front view of the same:
The dotted line A B, which indicates the course of the sliver, is drawn so as to
touch the top face of the drawing and the top face of the retaining roller of the
spinning frame, and the dotted line C D indicates a line on which it may be
advantageous that the pressure of the front pressing roller should be maintained,
whatever may be the diameter of that roller. a is the bottom drawing roller, and a*
the pressing or top drawing roller. bis the bottom retaining roller, and 6 is the
pressing or top retaining roller. c is the saddle for applying pressure to the
rollers; this saddle is embraced by a bracket arm or support & bolted to the beam e
of the spinning frame.
The usual means for guiding: saddles is pins or arms projecting from the saddles
at a point between the axle of the front roller a* and the axle of the back roller b*,
and the result is, that as the diameter of the roller a* is diminished, the centre of
its axle will, in approaching the roller a, instead of moving in the plane.C, D,
describe a curve, and thereby shift the position of the nip or bite of the
rollers a a*..
Now the main object of the present invention is to ensure that the axis of the
roller a✶ shall always be on the line C D, irrespective of the diameter. of that
roller. In order to attain this result, the axle of the roller. a* is made.with two
collars, which embrace the bearing brass of the saddle c. This saddle, it will be
seen, fits between two cheeks of the bracket arm d carried by the beam 6, and
flanges on the bearing brass of the saddle-enter.and are guided in two slots or U's
in the cheeks of the bracket arm d, these slots being made parallel with the dotted
line C. D. By this means, the centre of the axle of the roller a* is always
maintained on the dotted line C, D.
The roller 6* is mounted in an extension piece c* of the saddle c; this piece is
capable of sliding on the saddle, and it is adjusted in position by means of a
screw c¹. Pressure is imparted to the saddle by means of the weighted rod f, fitted,
as usual, with a bearing nut f*.
It will be observed, that when the pressing roller a has been worn down and
refluted several times, until it has become small in diameter, the position of the

page_text: saddle will be changed as shown by the dotted lines in Fig. 1, and the position of
the rod and nut f, f*, which apply the pressure, would consequently be such as to
cause a greater proportion of the pressure to be applied to the front pressing
roller a*, when it is small, than when it is large. In order to obviate this defect,
the saddle shewn in Fig. 3 may be used. This figure shews in side view a
modification of the saddle illustrated in Fig. 1. This saddle is cranked to allow of
the point of contact with the bearing nut f (where the pressure is applied to the
saddle) touching a line drawn from the centre of the front pressing roller a*
to the centre of the back pressing roller b*, and this being so, the pressure applied
to the two pressing rollers will remain constant, whatever may be the diameter of
these rollers, provided the length of reach or distance between the centres of the
two rollers, remains the same.
Figs. 4 and 5 shew in side view and front view another modification of the
saddle, whereby the pressure will be maintained in the same proportions on back
and front pressing axles, whatever may be the relative diameters of the front
pressing rollers. The flanges of the saddle bearing brass, which fit between the
collars on the axle of the roller a*, will be guided in the line C D by the slots or
U's on the bracket arm d, in the same manner as in Fig. 1, but the bearing will be
adjustable in the saddle by means of the small screw c². As the diameter of the
pressing roller a* becomes reduced, its bearing must be adjusted by the screw c², so
as to ensure the saddle retaining a position parallel to the line A B. This provides
against any practical variation in the proportion of the pressure on the rollers a*b*,
however much the diameter of the roller a* may vary from time to time.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, as communicated
to me by my Foreign Correspondents, I declare that what I claim is
1. The means above described for maintaining the position of the nip of the
drawing rollers, of wet spinning frames, notwithstanding the variations in the
diameter of the pressing or top drawing roller.
2. The modified form of saddle shewn in Fig. 3, whereby the pressure of the
bearing nut is applied at or near a line which cuts the centres of the pressing
rollers.
3. The improved saddle shown in Figs. 4 and 5, wherein the bearing brass of the
pressing or top drawing roller, adapted to slide in fixed guides, is made adjustable
in its saddle to meet variations in the diameter of its rollers.