Year: 1894

page_text: cutter K, but do not exert any downward pressure upon the cutter, the forks G'
being intended only to traverse the cutter over the comb. The loose piece J will
overlie the central prong of the cutter and may be caused to bear upon it in a
manner to be hereafter explained. The rear end of the tongue J is provided with
a projection j. When it is desired to cause the tongue J to bear upon the central
tooth or teeth of the cutter K, a loose fork L is placed upon the lever G and is
slid forward until the point of bifurcation of the fork will underlie the projection;
of the pivoted piece or tongue J. In order to prevent the loose fork L from shifting
its position, its rear end is provided with a small projection which will take into
a corresponding depression in the upper surface of the lever G. The semi-spherical
piece H and the lever G are centrally bored out to permit the passage of a bolt M
that is provided with a four-square head m, the top of which will be flush with the
upper surface of the cover N. The bolt will pass downwards through the sphere H,
the lever G, the slot f¹ in the lever F, and through the base plate A, and will
project a short distance below A where it will be provided with a thumb screw m¹
When it is
which may be secured or locked by a spring or other suitable device.
required to bring any desired amount of tension upon the cutter K the thumb
screw m¹ will be screwed up, thereby bringing down the lever G. It will be
remembered that the loose piece or tongue J will merely loosely overlie the central
tooth or teeth of the cutter K, but the screwing up of the thumb screw m¹ will
bring down the lever G and with it the tongue J, the forward end of which will be
caused to press heavily upon the cutter, because its rear end j being pushed up or
supported by the loose fork L acting upon the projection j, and the whole being
brought down together with the lever G, it is obvious that as the rear end j cannot
give way, any desired amount of tension may be applied to the central tooth or
teeth of the cutter K by the forward end of J pressing thereupon.
In the drawing at Fig. 2, the loose tongue J is shewn unforked, and bearing
upon the central one of three teeth of the cutter K, but by the plan shewn in
Fig. 5 a modification of the form of the loose tongue is shewn whereby the tongue
may be applied (by bifurcating its forward end) to the central two teeth of a
cutter that is provided with four teeth.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, as communicated
to me by my foreign correspondents, I declare that what I claim is :-
1. In machine sheep-shears, the combination with a lever that is pivoted, or the
fulcrum of which is at the forward end, (while its rear end is vibrated in any
suitable manner) with an overlying lever, the rear end of which is loosely pivotted
to the lower lever, while its fulcrum is at or near its centre, and its forward end in
direct connection with the cutter as herein specified.
2. In machine sheep-shears, the combination with a lever that is pivoted, or the
fulcrum of which is at the forward end (while its rear end is vibrated in any
suitable manner) with an overlying lever, the rear end of which is loosely pivoted
to the lower lever, while its fulcrum is at or near its centre, and its forward end in
direct connection with the cutter, the fulcrum of the upper lever consisting of a
sphere or universal joint which will permit of a modified movement of the upper
lever in every lateral direction, whereby the tension upon the cutter shall be evenly
distributed over all its teeth, as herein set forth.
3. In machine sheep-shears, in combination, a vibrating lever, a central tongue
(whether the same be forked or not) that is loosely pivotted to the lever in the
line of its longitudinal axis, the said tongue being provided with a rear projection
that shall overlie the centre of the point of bifurcation of a fork that is loosely
placed above the lever to which the tongue is pivoted, the whole being so disposed
and arranged that the vibrating lever, the pivoted piece or tongue, and the loose
overlying fork shall act together as one piece when tension is brought to bear upon
the cutter as herein specified.
"
4. In machine sheep-shears, the combination with a vibrating lever that is forked

page_text: at the forward end, of a central loose piece or tongue that is centrally pivoted to
the forward end of the lever, a loose fork that shall overlie the lever and underlie
a projection at the rear end of the pivoted tongue, a central spherical fulcrum upon
which the lever shall rock or vibrate, and a central or axial tension bolt, and
thumb screw, that is manipulated from underneath the machine, whereby the
adjustable tension is obtained to secure the necessary intimacy of contact between
the comb and cutter, as herein set forth.
5. In machine sheep-shears, lengthening the crank pin and bending it until such
elongation shall be in the same axial line as the motive power shaft of the machine,
and staying such elongation in a fixed thrust bearing whereby the said crank pin
shall be rendered more rigid and less liable to work loose as herein specified.
Dated this 21st day of August 1894.
PHILIP M. JUSTICE.