An Improved Rotary Shearing Machine.
Year: 1899

page_text: Date of Application, 14th Mar., 1899-Accepted, 22nd July, 1899
An Improved Rotary Shearing Machine.
We, JonN HENRY SILLEY, and WALTER WILLIAM BACON, of 41, Castlereagh
Street, Sydney, in the Colony of New South Wales, Engineer, 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 shearing machines, and more particu-
larly to sheep shearing machines.
The objects of this invention are:-
1. To provide a machine in which the vibration of the working parts is reduced
to a minimum.
2. To substitute a rotary movement of the cutting blades for the reciprocating
movement generally adopted in shearing machines.
'
3. To provide a machine in which the cutting blades are easily interchangeable.
4. To provide a machine which can be manufactured cheaply and which
consists of few working parts.
To make our invention clear we shall refer at once to the accompanying
drawings.
Figure 1 is a plan of our machine with top cover removed.
Figure 2 is section through machine complete.
Figure 3 elevation showing end of tension lever, and portion of revolving disc.
A is comb.
BB are adjustable cutting blades which are held in position by the screws CC,
these blades may be made in any desirable shape.
Dis disc to which the cutting blades B B are fixed.
E is spindle by means of which the disc 1) carrying the cutting blades BB
is revolved. The spindle E may be an integral part of disc D or may be attached
thereto in any suitable manner.
F is a shoulder or boss on top side of disc D and forming part thereof in which
is formed an annular recess G. In this annular recess a number of steel balls
XX are placed, and a ring or washer H fitted on top thereof, thus forming a
ball race, which is provided for the purpose of reducing the friction when the
desired tension is applied to keep the cutting blades B B in close contact with
the comb A.
J is a spring lever, one end of which fits over the spindle E and rests on ring
or washer H the other end being retained in a socket 12.
K is a fixed pillar which passes through an aperture in centre of the spring
lever J.
I, is a tension nut on fixed pillar K provided for the purpose of regulating the
tension, as when the nut L is screwed down the end J¹ of lever J is pressed down on
washer H, thus keeping the cutting blades B B in close contact with the comb A.
The end of lever which fits over spindle E is provided on the under side with
projections or teeth J³ (Figure 3) which fit into grooves in the washer or ring H
for the purpose of preventing the washer H from revolving, M M are small set

page_text: screws provided for the purpose of holding the washer H in position when the
lever Jis removed.
Nis spring attachment provided to lock the tension nut L.
P is lower portion of handle of machine.
Qis upper portion of handle of machine.
R is hinge by means of which the upper and lower portion of handle are
connected.
S is nut holding upper portion of handle in position.
Tis shield which is attached to the upper portion of handle and fits over and
protects the revolving disc D.
The method of operating our invention is as follows:-The power is trans-
mitted to the spindle E by means of a flexible shaft connected in any suitable
manner to the said spindle, and the disc I carrying the cutting blades B revolved.
The blades B B are kept in contact with the comb A by means of spring lever J,
the pressure being regulated by tension nut L, the revolving disc 1) being pro-
tected from contact with the wool or other material to be shorn by means of
the shield T.
Having now, particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
-
J. In an improved shearing machine the combination of a revolving disc (such
as D) having adjustable cutting blades, with a comb (such as A) substantially
is described and as illustrated in the drawings.
2. In an improved shearing machine, the combination of a revolving disc
(such as D) having adjustable cutting blades, and a comb (such as A), with a
spring lever (such as J) and tension nut (such as L) substantially as described
and as illustrated in the drawings.
Dated this 13th day of March 1800
WM. P. THOMPSON & Co.,
Agents.