Year: 1887

page_text: Date of Application, 25th May, 1887
Complete Left, 3rd Feb., 1888
Complete Accepted, 9th Mar., 1888
We, ARTHUR TREDGOLD LAWSON, Engineer and SOMERVILLE DEAR, Manager, both
of the Hope Foundry Leeds in the County of York do hereby declare the nature of
this invention to be as follows:-
This invention relates mainly to improvements in the construction of differential
wheels used in conjunction with the varying motion required for driving the bobbins
of a regulating roving or spinning frame.
The drag.wheel or wheel to be retarded or accelerated is arranged to run loosely
upon the main or driving shaft of the machine and is retarded or accelerated in its
rotation in any ordinary way. The wheel carries two short axes parallel with the
main shaft these axes are driven by spur gear wheels upon them gearing into an
internally toothed wheel which is fast on the main shaft-and the axes by other spur
wheels upon them give motion to a socket wheel which turns loosely on the main
shaft and from the socket wheel motion is transmitted to the bobbin shaft.
As the rotation of the drag wheel is more and more retarded or accelerated so
the speed at which the bobbin shaft is driven will be increased or diminished.
By this construction of the differential motion the desired speed of the bobbin is
brought up at once without strain upon the leading gearing and the wheels or pinions
in the differential motion have not only the advantage of having spur teeth but also
the bearings in which they are supported can be of sufficient size to withstand any
strain put upon them in performing their work as the short axes. can be supported at
their two ends as well as in the middle.
The wheels and pinions are arranged to give the same result as the ordinary or
commonly used differential wheel and have the advantage that a greater or less
difference of speed can be easily arranged by changing the socket wheel and the two
pinions on the ends of the two short shafts.
CARPMAEL & Co.,
Agents for the Applicants.

page_text: Required.
We, ARTHUR TREDGOLD LAWSON, Engineer, and SOMERVILLE DEAR, Manager,
both of the Hope Foundry, Leeds, in the County of York, 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 mainly to improvements in the construction of differential
wheels used in conjunction with the varying motion required for driving the bobbins
of a regulating roving or spinning frame.
The main toothed wheel of the differential wheel is arranged to run loosely upon
the main or driving shaft of the machine and is driven at varying speeds in the
manner herein after described or in other ordinary way. The wheel carries two short
axes parallel with the main shaft-these axes are driven by spur gear wheels upon
them gearing into an internally toothed wheel which is fast on the main shaft-and.
the axes by other spur wheels upon them give motion to a socket wheel which
turns loosely on the inain shaft and from the socket wheel motion is transmitted to
the bobbin shaft.
As the rotation of the main toothed wheel is more and more retarded or
accelerated so the speed at which the bobbin shaft is driven will be increased or
diminished.
By this construction of the differential motion the desired speed of the bobbin is
brought up at once without strain upon the leading gearing and the wheels or pinions
in the differential motion have not only the advantage of having spur teeth but also
the bearings in which they are supported can be of sufficient size to withstand any
strain put upon them in performing their work as the short axes can be supported at
their two ends as well as in the middle.
The wheels and pinions are arranged to give the same result as the ordinary or
commonly used differential wheel and have the advantage that a greater or less
difference of speed can be easily arranged by changing the socket wheel and the two
pinions on the ends of the two short shafts.
Figure 1 is a longitudinal section of the differential wheel-Figures 2 and 3 are
end elevations Figure 4 is an elevation of the toothed wheel B which is loose upon
the main shaft-Figure 5 is a plan of the ring M-and Figure 6 a plan of the
ring O.
Figure 7 is a back elevation of part of a roving frame showing the cone druins
used for driving the wheel B and accelerating or retarding the speed at which it
is driven.
Figure 8 is a sectional elevation of the roving frame showing the gearing by which
motion is transmitted through the differential wheel to the bobbins. -

page_text: A is the main driving shaft of the roving frame-B is the main toothed wheel of
the differential gear loose upon it-C C are bosses on two opposite sides of
the centre of this wheel and carrying two short shafts G G-H H are pinions on
one end of these shafts gearing with and driven by the internally toothed wheel I
which is fixed upon the main shaft. On the opposite ends of the shafts G are the
pinions K which gear into and drive the socket wheel L-the socket 9 turns loosely
upon the driving shaft and at its opposite end carries a toothed pinion 10 from
which motion is transmitted to the bobbins as herein after explained-F is part
of the boss of the wheel B it forms a sleeve over the boss J of the internal
wheel I.
M is a ring formed with overhung bosses N to support the ends of the shafts G-
it is fixed to four projecting lugs E on one side of the rim of the wheel B. On the
opposite side the wheel has projecting from it two arms D to which is fixed a ring O
which is provided with bosses P to support the opposite ends of the shafts G to those
which are supported by the bosses N.
.
We will now describe the means we adopt for giving motion to the wheel B and
for transmitting motion from the socket 9 to the bobbins.
In Figures 7 and 8-1 is a box frame end of the roving frame, it serves both as
a cover and support for the main gearing-2 is a cone shaft driven from the main
shaft by gearing not shown in the drawing-3 is a cone upon the shaft from which
power is transmittnd by means of a strap to a cone 4 below it. Upon the axle or
shaft of this cone is fixed a pinion 5, this gears into a pinion 6 on the shaft 7 and
upon the shaft 7 is a pinion 8 gearing into the main toothed wheel B of the differential
wheel. From the socket 9 of the differential wheel motion is conveyed through the
wheels 10, 11, 12 and 13 to the bobbin shaft 14-from which with the bevil
pinions 15 and 16 the bobbin wheels 17, 171, 172, are driven. On the upper part of
the wheels are the bobbin plates 18, 18' which give motion to the bobbins. The
spindles 19, 19¹ pass through the wheel collars 20, 20¹ on the lifter 21. The spindle
shaft 22 gives motion to the spindles with the bevil pinion 23 gearing into the
pinion 24 on which is a pinion 25 gearing into the pinions 26 and 27 on the
spindles. The varying motion is given to the bobbins through the differential wheel
in the following manner.
If the bottom cone 4 and consequently the toothed wheel B of the differential
wheel were not moving the rate of revolution transmitted from the annular wheel I
through the pinions in the differential wheel to the socket wheel L would be exactly
equal to that of the shaft A and the socket wheel from which the bobbins are driven
would revolve at the same speed as the wheel on the shaft A from which the spindles
are driven only the two wheels would revolve in opposite directions. In this way
the spindles and bobbins would be driven at the same speed and no winding could
take place but if the wheel B of the differential wheel be driven through the conos
in the opposite direction to the shaft A the speed of the socket wheel will be
accelerated in the same ratio and thus the excess speed of the bobbin over the spindle
is obtained.
At the commencement of the bobbin the strap which works over the two cones is
at the largest end of the upper cone and the wheel B and consequently the bobbin is
driven at its maximum speed. With the deposit of every layer of rove upon the
bobbin the strap is, traversed a little distance from the largest diameter of the top
cone until with a full bobbin the minimum diameter is reached giving the minimum
rate of revolution to the bobbin.
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. The construction of the differential wheels used in driving the bobbins of
regulating roving and spinning frames and in other machinery in which a similar
varying or regulating motion is required substantially in the manner herein before
described and illustrated in the drawing annexed.

page_text: 2. The combination of the toothed wheel B which is loose on the main shaft
of a roving or spinning frame and is driven at varying speed as the yarns or
rovings accumulate on the bobbins and which also carries spindles each having
two pinions on it one gearing with an internally toothed wheel fast on the main
shaft and the other with a toothed wheel on a socket which can turn loosely on
the shaft and from which socket motion is transmitted to the bobbins substantially
as described.