Year: 1898

page_text: WASHINGTON HUME, C.E., 278, Dashwood House, 9, New Broad Street, London,
E.C., do hereby declare the nature of this invention to be as follows:-
This invention relates to an improvement in sheep shearing machines, the chief
features of which are:-
(I) The application of a bevel-gearing A, B, shewn on drawing.
(II) The excentric cam action B₁ imparted by bevel-wheel B to give a radial
motion to upper shearing blade L by means of the radial lever C, C, working on
centre K and acting through stud M.
(III) The method of throwing the clutch G in and out of gear as shewn by J, D,
in connection with spiral spring H, or by the same clutch G without said spring H
and actuated by a thumb catch (not shewn) working on the side frame against a
suitable spring and grasping the collar of the clutch.
(IV) The method of driving the machine either by means of an endless cord
running between guide rollers and over suitable pulley, E, connected to spindle, F,
at tail end of handle of machine, as shewn in Figures I, II, and III, of drawing,
or instead by means of a flexible shaft connected direct to the tail end of said
spindle, F, without the interposition of said pulley.
EXPLANATION OF DRAWING.
Fig. I is longitudinal section. F is centre of driving spindle. G, driving
clutch on square part formed on driving spindle and kept in gear by spiral
spring H and thrown out of gear by cam J, moved by small handle 1). A is
bevel-pinion loose on spindle and thrown in and out of gear by clutch G. B is
toothed mitre-wheel with excentric lower boss or cam B all in one piece. C is
radial lever actuated by cam B' centred at K and imparting radial reciprocating
motion to upper shear-blade L through stud M. L is upper moveable shear-blade
centred at N and receiving radial reciprocating motion from stud M. O is lower
fixed shear-blade. Figure II plan. Figure III elevation of driving arrange-
ment.
1000

page_text: .
A communication from abroad by ENRIQUE BENTHAM, of 424, Calle Corrientes,
Buenos Aires, Argentine Republic, South America, Accountant.
I, WASHINGTON HUME, of 278, Dashwood House, 9, New Broad Street, London,
E.C., Civil 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 has reference to a construction of shearing machine suitable for
shearing sheep, wherein a movable shearing blade is caused to oscillate over a
fixed shearing blade by the action of a cam which may be driven from a driving
shaft through toothed gearing that can be thrown in and out of connection with
such shaft by means of a clutch as I shall now proceed to more fully explain by
reference to the accompanying illustrative drawings wherein Figs. 1, 2 and
show the improved shearing machine in longitudinal section, plan and end view
respectively. Fig. 4 is a sectional plan view showing a lever, and a cam for
oscillating the same.
A is the lower fixed shearing blade provided with teeth A¹ and secured to the
bottom of a frame or holder B provided at its rear end with a handle C. D is
the movable shearing blade provided with teeth II and pivoted at D2 to the
upper side of the fixed blade Å. This movable blade D is oscillated by a lever E
pivoted to the holder B at E¹ and connected to the movable blade D by a pin and
slot connection F and F¹, the said lever being oscillated by a cam G arranged to
rotate in a slot E³ therein. The cam is rotated from a driving shaft H through
a bevel pinion I and a bevel wheel K, the latter of which is mounted to turn about
a fixed stud L and is shown as formed in one with the cam G which forms the boss
of such wheel.
To enable the movable shearing blade 1 to be stopped without stopping the
driving shaft H the bevel pinion I is connected to the said shaft through a clutch
of which one part M is formed by the boss of the pinion I and is free to rotate on
the shaft, whilst the other part M is formed by a sleeve connected by a feather
to the shaft so that it can slide endways on but must rotate with the shaft.
The clutch part M¹ is normally forced into engagement with the clutch part M
by a coiled spring N encircling the shaft but can be moved backward out of
engagement with the clutch part M by a cam which can be partly turned by
a handle P and caused to act against a collar M³ on the clutch part . Instead
of a jaw clutch, as shown, a friction clutch may be used. Also the spring N
may be omitted and the clutch part M¹ be actuated by a thumb catch (not shown)
mounted to work on the side of the holder B against a spring and to engage
the collar M2 on the sleeve M¹.
The driving shaft H, may be rotated by an endless rope Q passing around a
groove pulley R fixed to the shaft and between guide rollers S; or it may be
rotated by a flexible driving shaft connected to its rear end.
T is a spring plate that is fixed to the holder B by a nut U so as to cover the
front end of the oscillating lever E, and press the movable shearing blade D
close against the fixed shearing blade A.
The handle C and the contained driving shaft H, instead of being arranged
horizontal and parallel to the shearing blades as shown, may be inclined upwardly
and backwardly at an angle to the framework of the machine in which case the
axles of the bevel pinion I and bevel wheel K instead of being arranged at right
angles to one another will be placed at an obtuse angle to one another.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In a sheep shearing machine, driving the upper shearing blade by a radial
lever oscillated by a rotary cam working in a slot in the lever and about a
vertical axis, substantially as described with reference to the accompanying
drawings.
2. sheep shearing machine wherein the movable shearing blade is caused to
oscillate over the fixed shearing blade by the action of an oscillating lever, and
rotary cam driven through toothed gearing and a clutch from a driving shaft
extending through the handle of the machine, substantially as described with
reference to the accompanying drawings.
3. The combination and arrangement of parts constituting the improved sheep
shearing machine shown in and described with reference to the drawing annexed.
1000
For the Applicant,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.