IMPROVEMENTS IN OR APPLICABLE TO PAPER CUTTING MACHINES AND IN: CLUTCH BOX OR FRICTIONAL MECHANISM FOR DRIVING THE SAME, APPLICABLE ALSO TO OTHER MACHINERY." PROVISIONAL SPECIFICATION
Year: 1882

page_text: LETTERS PATENT to William Crosland of Newton Heath in the County of
Lancaster Engineer and Machinist, for an Invention of "IMPROVEMENTS IN
OR APPLICABLE TO PAPER CUTTING MACHINES AND IN: CLUTCH BOX OR
FRICTIONAL MECHANISM FOR DRIVING THE SAME, APPLICABLE ALSO TO OTHER
MACHINERY."
PROVISIONAL SPECIFICATION left by the said William Crosland at the
Office of the Commissioners of Patents on the 19th October 1882.
WILLIAM CROSLAND of Newton Heath in the County of Lancaster Engineer
and Machinist "IMPROVEMENTS IN OR APPLICABLE TO PAPER CUTTING MACHINES
AND IN CLUTCH BOX OR FRICTIONAL MECHANISM FOR DRIVING THE SAME
APPLICABLE ALSO TO OTHER MACHINERY
">
The first part of this invention relates to a novel mode of securing the knife in
position so that the same can be readily removed without the loss of time which
has hitherto ensued owing to having to unscrew the nuts off several bolts.
In accordance with this invention I dispense with all bolts and avoid the
consequent loss of time in unscrewing them by securing the knife in position in a
dovetail or angular groove formed in the knife stock or holder-a correspondingly
formed projection being secured along the whole length of the front face of the
knife for this purpose
All that is necessary in removing the knife say for sharpening purposes is to
slide it sideways out of the groove-a set screw at one end serving to steady the
knife in position and prevent it working itself out.
The second part of my Invention relates to a novel arrangement of mechanism
for raising and lowering the pressure bar and for putting and retaining the requisite
Dip upon the same whilst the cutting operation is being performed. I mount this
pressure bar in the usual guide grooves formed in the side frames of the machine
and so as to project through to the outside where toothed racks are connected to
These toothed racks are in gear with pinions on each extremity of a
shaft running across underneath the table of the machine. A pulley is mounted
upon this same shaft over which a strap passes connected at one extremity to a
treadle and having at its other end a heavy weight, so that when the foot of the
the same.
Price Rd1

page_text: operator is put upon the treadle the pressure bar is brought down on to the work,
and when the foot is removed the pressure bar rises again by the action of the
balance weight.
When the pressure bar is thus brought down by the foot the machine is at once,
put in motion and a cam gives extra pressure to the work and continues such
pressure during the descent of the knife, by means of a lever and pawl dropping
into a ratchet wheel on the same shaft, herein before mentioned. This cam is caused
to revolve by being connected by bevil gearing to the centre shaft which brings
down the knife, and is operated by a worm and worm-wheel the worm being
arranged to revolve constantly in a small cistern of oil,
This Invention further relates to a novel arrangement of clutch box for paper
cutting and other machinery and to a self acting stopping motion for the same.
This clutch box consists of a box wheel running loose on the driving shaft, inside
which is a disc, which is keyed fast to the shaft, and is provided with a pair of
slide blocks, mounted and guided in suitable grooves. These sliding blocks are
connected by a pair of links to a sleeve piece which is capable of sliding upon the
same shaft, but which is kept constantly pressed away from the disc by means of a
suitable spiral spring. This sleeve piece in its turn is coupled to an arm branching
from a rod to which a partial revolution is given when it is required to put the
clutch box in gear, this action causing the sleeve piece to compress the spring and
to push outwards the slide blocks against the flange of the box wheel and which
blocks being covered on their outer extremities with leather or other suitable
covering to produce a sufficient frictional contact to cause the two to revolve
together.
A self stopping motion suitable for this clutch box is constructed by having a
lever branching from the rod hereinbefore mentioned and which may be locked to
the side of the frame work by means of a sliding bolt operated by a suitable lever,
rod and friction bowl held in contact with a revolving tappet cam, so that every
time such cam revolves its sappet causes the withdrawal of the bolt from the
locking lever and so releases the clutch box

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Crosland in the Great Seal Patent Office on the
18th April 1883.
WILLIAM CROSLAND of Newton Heath in the County of Lancaster Engineer
and Machinist. "IMPROVEMENTS IN OR APPLICABLE TO PAPER-CUTTING MACHINES
AND IN CLUTCH-BOX OR FRICTIONAL MECHANISM FOR DRIVING THE SAME,
APPLICABLE ALSO TO OTHER MACHINERY
"
The first part of this invention relates to a novel mode of securing the knife in
position so that the same can be readily removed without the loss of time which
has hitherto been rendered necessary by having to unscrew the nuts off several
bolts.
The second part of my invention relates to a novel arrangement of mechanism
for raising and lowering the pressure bar and for putting and retaining the requisite
nip upon the same whilst the cutting operation is being performed.
This invention further relates to a novel arrangement of clutch-box for paper
cutting and other machinery and to a self-acting stopping motion for the same.
And in order that this my said invention may be the more readily seen and
understood I have hereunto annexed a drawing illustrative of my improvements
and will now proceed to describe the same with the assistance of the various Fig's
and letters of reference marked thereon.
Fig 1 is a side view Fig 2 a side sectional view and Fig 3 is a back view partly
in section of a Paper cutting machine embodying my improvements Fig 4
represents a side sectional view of the paper cutting knife on an enlarged scale.
In accordance with the first part of my invention I dispense with all bolts in
securing the knife in position and avoid the consequent loss of time in unscrewing
them by securing the knife a in position in a dovetail or angular groove a¹ formed
in the knife stock or holder a² a correspondingly formed projection a³ being
secured by riveting or otherwise along the whole length of the front face of the
knife a for this purpose.
All that is necessary in removing the knife say for sharpening purposes is to slide
it sideways out of the groove a', a set screw a at one end serving to steady the
knife a in position and prevent it working itself out.
In carrying out the second part of my invention I mount the pressure bar 6 in
the usual guide grooves b¹ formed in the side frames 62 of the machine and so as to
project through to the outside where toothed racks b³ are connected to the same.
These toothed racks b³ are in gear with pinions c¹ on each extremity of a shaft c
running across underneath the table d of the machine. A pulley c² is mounted
upon this same shaft cover which a strap c³ passes connected at one extremity to a
treddle e and having at its other end a heavy weight e so that when the foot of the
operator is put upon the treddle e the pressure bar b is by the partial revolution of
the shaft c brought down on to the work and when the foot is removed the pressure
bar b rises again by the action of the balance weight c. When the pressure bar b
is thus brought down by the foot and the machine put in motion a cam f gives
extra pressure to the work and continues such pressure during the decent of the
knife by means of a lever arm f¹ and pawl f" dropping into a ratchet wheel f³ on
the same shaft c herein before mentioned, this lever arm f being connected as
illustrated by the rod. g to the compound lever g¹ which has at its extremity a
friction bowl g and is so arranged with a strong spiral spring g³ as to yield by the
extension of such spring when the desired ultimate pressure is exceeded and thus
prevent the machine stopping or breaking down. This cam f is caused to revolve

page_text: by its shaft. f being connected by bevil gearing ¹ to the centre shaft which by
means of the connecting rod brings down the knife a and is operated by a worm i
and worm-wheel the worm i upou the driving shaft i³ being arranged to revolve
constantly in a small cistern of oil
My improved clutch-box consists of a box wheel running loose on the driving
shaft inside which box wheel is a disc which is keyed fast to shaft
and is provided with a pair of slide blocks mounted and guided in suitable
grooves. These sliding blocks are connected by a pair of links to a sleeve
piece which is capable of sliding upon the same shaft but which is kept
constantly pressed away from the disc j by means of a suitable spiral spring r.
This sleeve piece in its turn is coupled to an arm branching from a rod to
which a partial revolution is given when it is required to put the clutch-box in
gear; this action causing the sleeve-piece to compress the spring and so push
outwards the slide blocks against the flange of the box wheel j and which
blocks being covered on their outer extremities with leather or other suitable
covering so produce a sufficient frictional contact to cause the two to revolve
together.
A self stopping motion suitable for this clutch-box is constructed by having a
lever a branching from the rod and which may be locked to the side of the frame
work by means of a sliding bolt operated by a suitable lever t' rod t and
friction bowl held in contact with a revolving tappet cam & mounted upon the
shaft so that every time such cam u revolves its tappet causes the withdrawal of
the bolt from the locking lever and so releases the clutch-box. In the drawings
this self stopping motion is shewn with the tappet in position for stopping the
machine.
Although only hereinbefore described in reference to paper cutting machines it
will be obvious that the last part of my invention is equally applicable to other
machines.
Having thus particularly described and ascertained the nature of this my said
invention together with the best methods with which I am acquainted for carrying
the same into practical effect I wish it to be distinctly understood that I do not
confine myself to the precise details relative proportions or dimensions of my
improved paper-cutting machine herein before described and illustrated on the
accompanying drawing as the same may be considerably varied without departing
from the invention but what I claim as my improvements in Paper Cutting
machines are:-
1st The mode of securing the knife in position whereby the usual bolts and nuts
are dispensed with and the consequent loss of time is avoided in removing the
knife substantially as herein before described and illustrated on the accompanying.
drawing.
2nd The novel arrangement and construction of mechanism for raising and
lowering the pressure bar and for putting and retaining the requisite nip upon the
same whilst the cutting operation is being performed as herein before described and
illustrated on the accompanying drawing.
3rd The novel construction and arrangement of mechanism forming a clutch box
and self-stopping mechanism for Paper cutting and other minchines substantially as
hereinbefore described and illustrated on the accompanying drawing.
In witness whereof I the said William Crosland have hereunto set my hand
and seal this Sixteenth day of April in the year of our Lord One thousand
Eight hundred and Eighty threo