Improvements in Machines and Appliances for Grinding Cutters for Shears.
Year: 1893

page_text: Date of Application, 16th Dec., 1893
Complete Specification Left, 17th Sept., 1894-Accepted, 15th Dec., 1894
PROVISIONAL SPECIFICATION.
Improvements in Machines and Appliances for Grinding Cutters for
Shears.
We, WOLSELEY SHEEP SHEARING MACHINE COMPANY LIMITED, and
HERBERT AUSTIN, both of Sydney Works, Broad Street, in the City of
Birmingham, Manufacturers, do hereby declare the nature of this invention to
be as follows:-
-
This invention has reference to the manner in which we construct and arrange
machines and appliances for grinding cutters and shearing tools for use upon sheep
shears, horse clippers and like cutting and clipping appliances, the objects of our
invention being to produce sharpened edges upon our cutting, shearing or clipping
tools by machines and appliances which can be controlled and manipulated by
unskilled labour, and to produce each clipper or cutter with its edges all uniformly
sharpened so as to be interchangeable for the various complete cutters, clippers or
shears which are to be fitted with them.
In carrying our invention into effect we construct our face grinding machine with
a bed or framework of any ordinary kind suitable for carrying driving pulleys for
giving motion to an emery wheel or other circular grinding wheel which is
constantly revolving at a suitable speed to grind the faces of the cutters which we
cause to pass in a slow manner across a portion of the surface of the grinding disc
or wheel.
We convey the cutters upon a revolving disc mounted upon bearings
carried on the bed or framework and driven by belting or gearing in a slow manner
suitable for permitting the full grinding or sharpening to be accomplished during
the period of contact with the grinding disc while travelling round part its surface.
The position of the grinding wheel or disc we prefer to be such as to admit of the
cutter carrier disc being fed by the boy or attendant when seated in front of the
machine bed while the grinding wheel we prefer to mount and guard in a position
away from or behind the feeding position taken up by the attendant.
Within the circular cutter carrier we mount a number of holders in the form of
spring hook-like clips having springs mounted upon their enclosed ends within the
body of the disc carrier for the purpose of putting a direct tension or positive pull
upon the book ends to keep the cutters with their backs bearing tightly and evenly
against the face of the disc carrier. These spring clips we make preferably double
to enter into two holes provided in the cutters; and we mount the springs and clips
within the suitably formed disc or circular carrier so that when the cutters have
passed the grinding or sharpening portion of their path and have travelled away
from the revolving grinder then the springs shall be forced in by a cam like surface
or plate tripping bar mounted upon the machine framework, and on being thus forced
in the cutters which have then been ground upon their faces may be readily removed
by the attendant and unground cutters placed in position for similar treatment.
The form of the cutter carrier we vary to suit the type of cutter to be fed on to
it and the speed and arrangement of clips we vary to suit any particular
requirement.
The side grinding upon the same form of cutters we accomplish in a machine
constructed according to this our present invention in which a rocking motion is
given to the cutter holder in a direction parallel or nearly so to the face to be
ground, and the grinding disc we construct with its grinding or sharpening surfaces

page_text: arranged or formed so as to grind or sharpen all the approximately parallel faces
of the cutter at once.
We mount a rocking slide rest or cutter holder upon a bed or framework, and we
cause this holder of whatever form we employ to be brought against a revolving
lap disc wheel of emery or other suitable material which has its periphery formed
or grooved to suit the angles or faces of the cutters which are to be ground. The
cutters we hold in position upon the slide rest or holder in one convenient manner
by arranging a dummy or template bed to fit the hollowed body of the cutters and
we clip the cutters on to these beds arranged single or in numbers upon the rocking
or sliding holder, by means of cam action clamping plates or by screws and plates
or held securely by any well known nipping device employed for like purposes.
We sometimes mount the cutters upon a capstan head slide so that when the
holder is withdrawn a determined distance, the cutter may automatically be brought
away from the surface of the revolving grinder and another unground cutter
brought into its position thus enabling the attendant to withdraw or remove the
ground cutter while the other is being ground upon the same holder block or
cutter rest.
We do not limit the application of our invention to any particular form or type
of cutter, but we modify the arrangements herein before described to suit varying
shapes of cutters and to suit any particular requirement.
Dated this 15th day of December 1893.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., Agents for the Applicants.
· Improvements in Machines and Appliances for Grinding Cutters for
Shears.
We, WOLSELEY SHEEP SHEARING MACHINE COMPANY LIMITED, and
HERBERT AUSTIN, both of Sydney Works, Broad Street, in the City of
Birmingham, Manufacturers, 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 the manner in which we construct and arrange
machines and appliances for grinding cutters and shearing tools for use upon sheep
shears, horse clippers and like cutting and clipping appliances, the objects of our
invention being to produce sharpened edges upon our cutting, shearing or clipping
tools by machines and appliances which can be controlled and manipulated by
unskilled labour, and to produce each clipper or cutter with its edges all uniformly
sharpened so as to be interchangeable for the various complete cutters, clippers or
shears which are to be fitted with them.
In the four accompanying sheets of explanatory drawings,
Figure 1 is a front elevation of our double grinding machine for sharpening the
faces of cutters, and Figure 2 is an end elevation of the same.
Figure 3 is a detail elevation partly in section of the cutter holder with the
clipping devices for securing the cutters, and Figure 4 is a semi-end elevation of
the face of the same.
Figure 5 is a front elevation of our side grinding machine, and Figure 6 is a plan
of the same.
Figure 7 is a detail elevation of the table and grinding wheel used upon our
side grinding machine.
Figure 8 is a plan of one of the cutters to be ground, and Figure 8ª is a sectional
view through line 1, 2, Figure 8.
:

page_text: Figures and 10 are detail views representing the action of the rocking slide
rest.
In carrying our invention into effect we construct our face grinding machine
with a bed or framework A of any ordinary kind suitable for carrying driving
pulleys for giving motion to an emery wheel or other circular grinding wheel B
which is constantly revolving at a suitable speed to grind the faces of the cutters Z
which we cause to pass in a slow manner across a portion of the surface of the
grinding disc or wheel. We convey the cutters upon a revolving disc C Figure 3
mounted upon bearings carried on the bed or framework and driven by belting or
gearing in a slow manner suitable for permitting the full grinding or sharpening
to be accomplished during the period of contact with the grinding disc B while
travelling round past its surface. The position of the grinding disc B or wheel
we prefer to be such as to admit of the cutter carrier disc C being fed by the boy
or attendant when seated in front of the machine bed while the grinding wheel B
we prefer to mount and guard in a position away from or behind the feeding position
taken up by the attendant.
Within the circular cutter carrier we mount a number of holders or hooks D
Figures 3 and 4 in the form of spring hook-like clips having springs d mounted
upon their enclosed ends within the body of the disc carrier C for the purpose of
putting a direct tension or positive pull upon the hook ends D to keep the cutters Z
with their backs bearing tightly and evenly against the face of the diso carrier C.
These spring hooks or clips D we make preferably double to enter into two holes z¹
provided in the cutters; and we mount the springs and clips within the suitably
formed disc or circular carrier C so that when the cutters have passed the grinding
or sharpening portion of their path and have travelled away from the revolving
grinder then the springs shall be forced in by a cam like surface or plate tripping
bar E mounted upon the machine framework. On being thus forced in as shown
at D¹, the cutters which have then been ground upon their faces may be readily
removed by the attendant and unground cutters placed in position for similar
treatment, without stoppage of the revolving disc carrier or any other part of the
machine. The form of the cutter carrier C we vary to suit the type of cutter to
be fed on to it and the speed and arrangement of hooks or clips D D' we vary to
suit any particular requirement.
The side grinding upon the same form of cutters Z Figures 8 and 8 we
accomplish in a machine shown at Figures 5, 6, and 7, and partly in detail in the
Figures 9 and 10, constructed according to this our present invention in which a
rocking motion is given to the cutter holder F, in a direction parallel or nearly so
to the faces to be ground, and the grinding disc G we construct with its grinding or
sharpening surfaces 9, 9, 9' arranged or formed so as to grind or sharpen all the
approximately parallel faces of the cutter at once.
We mount a rocking rest H and cutter holder F upon a slide frame on the bed
or framework K by means of trunnions or pivots f, and we cause this holder to
rock by means of the handle N controlled by the operator so that the cutters may
be brought against a revolving lap disc grinding wheel G of emery or other suitable
material by rocking the rest H about the pivot f.
The wheel G has its periphery formed or grooved with three cutting faces as
at g, g', g, to suit the angles or faces of the cutters Z which are to be ground.
The shears or cutters Z we retain in position upon the circular holder F, which is
provided with a stem F7 in one convenient manner by arranging a dummy or
template bed or block L to fit the hollowed body of the cutters or we pin them
through the holes and we clip the cutters singly or in numbers_upon the
bed L, by means of a spring plate or lever M or by screws and plates. The cutter
holder F has an universal adjustable motion and clamped at any required position
by the screws F¹, F³, F³, F, F, and F.
We sometimes mount the cutters upon a capstan head slide so that when the
holder is withdrawn a determined distance the cutter may automatically be brought
away from the surface of the revolving grinder and another unground cutter

page_text: brought into its position thus enabling the attendant to withdraw or remove the
ground cutter while the other is being ground upon the same holder block or
cutter rest.
We do not limit the application of our invention to any particular form or
type of cutter, but we modify the arrangements hereinbefore described to suit
varying shapes of cutters and to suit any particular requirement.
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 combination and arrangement of a revolving cutter holder having hooks
or clips for securing cutters in position for enabling them to be carried past a
revolving grinding or sharpening disc or wheel with a tripping bar or spring
releasing device which permits of the sharpened cutters being removed and others
to be placed upon the holder without stoppage of any part of the machine, substan-
tially as and for the purposes hereinbefore described.
2. In a machine or apparatus for grinding or sharpening cutters or shears, the
arrangement of a revolving cutter holder with automatic clipping and releasing
devices, substantially as and for the purposes herein before described and as
illustrated in the accompanying drawings.
3. The construction and arrangement of grinding and sharpening machines and
appliances for cutters and shears having a moving table or holder for retaining the
cutter while it is operated upon at the approximately parallel faces simultaneously,
the motion of the table or holder being parallel or approximately parallel to the
cutting edges of the shears or cutters which are to be ground or sharpened, substan-
tially as and for the purposes hereinbefore described and as illustrated in the
accompanying drawings.
Dated this 15th day of September 1894
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicants.