Spindles of Slubbing and Roving Boxes and the like.
Year: 1888

page_text: Spindles of Slubbing and Roving Boxes and the like.
We, GEORGE MITCHELL and THOMAS HARGREAVES, both of Waterloo Mills,
Bradford, in the County of York, Managing Overlookers, do hereby declare the
nature of this invention to be as follows:-
This invention is specially applicable to slubbing and roving boxes and similar
machines in which tension pullies are used; and its object is to drive the spindles in
such a manner that, they revolve with less vibration, at a more uniform speed, and
with less tension on the driving bands; also to twist the fibre with greater regularity,
and to drive the machine with less power than hitherto.
The cylinder or pullies on
We accomplish our object in the following manner:
the driving shaft of the machine is or are of the ordinary description: but the whirls
or pullies on the spindles are cut with two grooves on the circumference, in which the
bands are placed, one band driving two spindles.
Each driving band from the cylinder or driving pullies pass round a spindle wharl
twice, thus obtaining more frictional contact between the driving band and wharl, at
the same time tending to press the spindles towards each other, thereby steadying them:
each band after leaving the wharls passes over the cylinder or another pulley on the
driving shaft, and over a friction pulley mounted in the ordinary manner; but by
obtaining the increased frictional contact as described, the spindles are run at a more
uniform rate, thereby twisting the fibre with greater regularity, and at the same time
requiring loss tension on the band; so that the weight on the tension pulley frame arm,
does not require to be so heavy, or the ordinary weight placed so far from the fulcrum,
as when the driving bands pass round the wharls in the ordinary manner.
1000

page_text: Spindles of Slubbing and Roving Boxes and the like.
We, GEORGE MITOHELL, and THOMAS HARGREAVES, both of Waterloo Mills,
Bradford, in the County of York, Managing Overlookers, 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 is specially applicable to slubbing and roving boxes and similar
machines in which tension pulleys are used, and its object is to drive the spindles in
such a manner that they revolve with less vibration, at a more uniform speed, and
with less tension on the driving bands; also to twist the fibre with greater regularity
and to drive the machine with less power than hitherto.
We accomplish our object in the following manner :--
The cylinder or pulleys on the driving shaft of the machine is or are of the ordinary
description. The whirls or pulleys on the spindles are cut with two grooves on the
circumference in which the bands are placed one band driving a pair of spindles.
Each driving band from the cylinder or driving pulley passes round a spindle whirl
twice, thus obtaining more frictional contact between the driving band and whirl, at
the same time tending to press the spindles towards each other, thereby steadying
them. Each band after leaving the whirls, passes over the cylinder or another pulley
on the driving shaft, and over a friction or tension pulley mounted in the ordinary
manner.
In order that our invention may be fully understood, we proceed to describe it with
reference to the drawings annexed, in which Fig. 1. represents a transverse sectional
'elevation.
Fig. 2. a front view of a portion of a slubbing or roving box, and
Fig. 3. a plan of a portion of a machine to which our improvements are applied.
In the drawings A. indicates the driving cylinder or pulleys; B. the tension pulley;
C. and D. a pair of spindles, each carrying double-grooved whirls, the grooves of
which are marked E. F G H. The driving band J. passes from the underside of the
driving cylinder into the groove E. thence round the groove G. thence round the
groove F. and thence to the groove H. thence to the upper side of a driving pulley A.
or the driving cylinder as the case may be, and round it to the tension pulley C.
round which it passes to the driving pulley A or the driving cylinder at the starting
point.
It will be understood that the driving pullies, cylinder tension pulley, and double
grooved whirls are all severally old, but our arrangement is such as to permit of the
driving band J. being passed from and to the driving pulley or cylinder, and round
and round the whirls of the spindles as often as may be desired. Hence the whirls
may with the same arrangement. be treble or multiple grooved in cases where more
driving friction is required; but we have found that double grooved whirls arranged

page_text: as shown, the frictional contact is so much increased and the retarding friction so
much diminished, that a machine containing 15 pairs of spindles may be easily turned
by hand.
By obtaining the increased frictional contact as described, the spindles are run at a
more uniform rate, thereby twisting the fibre with greater regularity, and at the
same time requiring less tension on the band; so that the weight W on the tension
pulley frame arm does not require to be so heavy, or the ordinary weight placed so far
from the fulcrum shaft S., as when the driving bands pass round the whirls in the
ordinary manner.
Having now particular 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 apparatus for driving the spindles of slubbing and roving boxes and the like
arranging the spindles in pairs and carrying the driving band round and round the
whirls of each pair of spindles for one turn of the band back. and forth to the driving
cylinder substantially as described.
2. In apparatus for driving the spindles of slubbing and roving boxes and the like
the combination of a pair of spindles with double or multiple grooved whirls with the
driving cylinder and tension pulley so that the band may be carried round and round
the whirls of the spindles and back and forth to the driving cylinder and tension
pulley substantially as and for the purpose described.
3. In apparatus for driving the spindles of slubbing and roving boxes and the like
the use of the arrangement of pairs of spindles with double grooved whirls driving
cylinder tension pulley and band hereinbefore described and illustrated by the
drawings.