Improvements in Electrically Driven Sheep Shearing or Hair Clipping Machines."
Year: 1897

page_text: Date of Application, 22nd Jan., 1897
Complete Specification Left, 22nd Oct., 1897-Accepted, 4th Dec., 1897
66
PROVISIONAL SPECIFICATION.
Improvements in Electrically Driven Sheep Shearing or Hair
Clipping Machines."
We, WILLIAM BAINES Gentleman, and WILLIAM NORRIS, Engineer, both of
5 and 6 Great Winchester Street, in the City of London. do hereby declare the
nature of this invention to be as follows:-
Our Invention relates to electrically driven sheep shearing machines, but it is
also applicable to any electrically driven machines for cutting or clipping hair.
Our object is to improve the electro motor operating the machine in order to
get the maximum of power for the minimum of weight, and also to make it
possible to readily adjust the cutting stroke to enable the machine to be used for
operations so dissimilar in their conditions as sheep shearing and horse clippings.
In carrying our invention into effect according to one modification we provide
an electro motor with a stationary armature and revolving field, as it has been
proved by experience that this type of motor is very powerful and effective for the
weight required. By this construction we are enabled to get an extremely light
and powerful motor. We arrange the brush holders to revolve inside a barrel
commutator, and we carry the current by means of ordinary arc lamp carbons,
which serve as the brushes.
The stampings for the field magnet cores we form in shuttle shape, and those of
the armature we form as a toothed rim with teeth about an eighth or an inch square
on both inside and outside peripheries. The outside teeth form fitting pieces to
attach to they out side aluminium case.
winding by a pair of collector rings mounted on an ebonite disc. These brushes,
We communicate current to the field
which consist of copper strips, are carried on the terminal screws, and the circuit
is completed by means of a suitable press switch.
The motor is preferably series wound, and may run at 10 volts, with 3 amperes
current at about 2500 revolutions per minute.
The motor so constructed we arrange at one end of the machine, and com-
municate its motion by means of a rotating spindle passing down the axis of
he machine within the handle.
novable cutting knife by means of an eccentric or crank pin. The stroke of the
We connect the end of this spindle to the
utting knife depends upon the throw of the crank pin, and in order to vary that
troke we vary the throw of the crank pin by means of a disc, which disc is fixed
an eccentric or crank pin. The disc carries a pin which operates the end of
he knife lever in any convenient way. By turning the disc round the pin or
ccentric on which it is placed, we vary the throw to any pre-arranged extent.
his disc can be fixed in any position by steel grub screws or other device, but
e arrangement enables us to produce great change in the stroke of the knives.
one machine we have arranged we can vary the stroke between a quarter of an
ch and three quarters of an inch, and thus we are enabled to get a stroke
fficient for the operations of horse clipping and sheep shearing. To protect the
ank pin operating the end of the knife lever we provide a hard steel ball, which
1 revolves inside the long slot in the top cutter.
P07

page_text: In another method of varying the stroke we preserve a constant throw of crank
and provide several positions in the lever for a removable pin. We thus change
the position of the fulcrum and the lever, and produce a varied stroke.
D100 1 1
T
1007
MARKS & CLERK,
18, Southampton Buildings, London, W.C. and
13, Temple Street. Birmingham. Agents.
6
Improvements in Electrically Driven Sheep Shearing or Hair
Clipping Machines."
We, WILLIAM BAINES, Gentleman, and WILLIAM NORRIS, Engineer, both of
5 and 6 Great Winchester Street, in the City of London, 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 :-
Our invention relates to electrically driven sheep shearing machines, but it is
also applicable to any electrically driven machines for cutting or clipping hair.
Our object is to improve the electro motor operating the machine in order to
get the maximum of power for the minimum of weight, and also to make it pos-
sible to readily adjust the cutting stroke to enable the machine to be used for
operations so disimillar in their conditions as sheep shearing and horse clipping.
Two methods of carrying our invention into effect are illustrated in the accom-
panying drawings as follows,
Figures 1, 2, 3, and 4 are respectively horizontal section, vertical section, eleva-
tion, and a detail of our improvements applied to a shearing machine with
oscillating cutters.
Figures 5, 6, and 7 are respectively horizontal section and two part sectional
elevations at right angles to each other of our improvements applied to a shearing
machine with revolving cutters.
In carrying our invention into effect according to the modification illustrated
at Figures 1, 2, 3, and 4 of the drawings we provide an electro motor with a
stationary armature A and revolving field B, as it has been poved by experience
that this type of motor is very powerful and effective for the weight required.
By this construction we are enabled to get an extremely light and powerful.
motor. We arrange the brush holders C to revolve inside a barrel commutator D,
and we carry the current by means of ordinary arc lamp carbons E, which serve
as the brushes.
The stampings b, b, for the field magnet cores we form in shuttle shape, and
those of the armature we form as a toothed rim a, a, with teeth about an eighth
of an inch square on both inside and outside peripheries. The outside teeth,
form fitting pieces to attach to the outside aluminium case F. We communicate
current to the field winding by a pair of collector rings mounted on an ebonite
disc G. The brushes H which consist of copper strips, are carried on the terminal
screws I, J, and the circuit is completed by means of a suitable press switch K.
The motor is preferably series wound, and may run at 10 volts, with 3 amperes
current at 2500 revolutions per minute.
The motor so constructed we arrange at one end of the machine placed inside
and attached to the case F in the manner hereinbefore described, and we com-
municate its motion by means of a rotating spindle L passing down the axis of the
machine within the handle. We connect the end of this spindle L to the movable
cutting knife M by means of an eccentric or crank pin N. The stroke of the

page_text: that stroke we vary the throw of the crank pin by means of a disc O to which it
epends upon the throw of the crank pin N, and in order to vary
is rigidly attached, while the said disc is fixed to a crank pin P formed integral
with the shaft L and as the disc 0 is swivelled centrally upon the pin P it is
5 evident that by turning this disc, shorter or greater distances between the centre
of the shaft L and the pin N can be produced and therefore shorter or greater
strokes as desired also produced. Thus by turning the disc O round the pin P
on which it is placed, we vary the throw to any pre-arranged extent, and we
preferably fix this disc in any required position by a steel grub screw such as q
or other suitable devices may be employed, the combined devices enabling changes
in the stroke of the knives according to the class of work. In one machine we
have arranged we can vary the stroke between a quarter of an inch and three
quarters of an inch, and thus we are enabled to get a stroke sufficient for the
operations of horse clipping and sheep shearing. To protect the crank pin N
operating the end R of the knife lever S we provide a hard steel ball T, which
ball revolves inside the long slot provided in the end R.
In another method of varying the stroke we preserve a constant throw of
crank and provide several positions in the lever for a removable pin. We thus
change the position of the fulerum and the lever, and produce a varied stroke.
Figures 5, 6, and 7 illustrate the application of our improvements to a machine
with rotary instead of oscillating cutters.
herein before described contained within the aluminium case F operates the
A similarly constructed motor to that
vertical shaft L and through the small bevil wheel U drives a large bevil wheel
V placed upon a short shaft W. We provide an extension X on the back of the
large bevil wheel V which carries the knives mm, and these knives bear against
the stationary knives nn and are fixed in adjustable sockets so that their stroke
can be altered to give the required cut.
The knives mm may by means of pivots zz be made to swing to throw them
ut of position at the end of the stroke. In this way the liability of collecting
he hair or wool by the cutters is largely obviated.
Having now particularly described and ascertained the nature of our said
vention, and in what manner the same is to be performed, we declare that what
e claim is,
1-In electrically driven sheep shearing or hair clipping machines the pro-
sion of a high speed motor of the type wherein the field revolves and the arma-
re is stationary with the following constituent parts in combination, shuttle
aped field magnet cores bb a toothed rim armature a a, carbon brushes revolving
side a barrel commutator two collector rings mounted on an ebonite disc to
mmunicate the current to the field windings, and copper strip brushes to convey
e current from the terminals to the disc and collecting rings.
2. The improved sheep shearing or hair clipping machine herein before
scribed with reference to Figures 1, 2, 3, and 4 of the accompanying drawings.
3. The improved sheep shearing or hair clipping machine hereinbefore
cribed with reference to Figures 5, 6, and 7 of the accompanying drawings.
Dated this 20th. day of October 1807
MARKS & CLERK
18, Southampton Buildings. London, W.C. and
13, Temple Street, Birmingham. Agents.