Improvements in Paper Cutting Machines.
Year: 1899

page_text: Date of Application, 26th Sept., 1899--Accepted, 14th Apr.,
1900
[Communicated from abroad by SAMUEL K. WHITE, of Mystic, Connecticut,
United States of America, Superintendent.]
Improvements in Paper Cutting Machines.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, 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:-
The invention relates to that class of paper cutters in which the sheets to be
cut are held upon a table by a clamping bar and are acted upon by a recipro-
cating cutter blade.
One object of the invention is to provide a simple and efficient means for
regulating the pressure of the clamp upon the pile of sheets according to the
resistance offered by the pile to the passage of the knife blade so that the greater
the resistance to the knife the greater will be the pressure of the clamp upon
the paper. This is accomplished by forcing the clamp upon the paper by the
action of a friction driver the friction of which is automatically regulated
according to the resistance offered to the knife, and one feature of the invention
consists in thus operating the clamp..
Another feature of invention consists in providing means for advancing the
pile of cut sheets under the knife without altering the setting of the back
guage, so that the pile of cut sheets may be readily and conveniently removed
by the operator without putting the hands under the knife. The means for
doing this may be a pusher independent of the back guage but it is preferred to
use the back guage to advance the cut stock and to return the back guage to
its original position so that its setting is not altered. It is also preferred to
advance and return the back guage by power driven mechanism, thrown into
operation at the will of the operator although this feature of the invention is
not limited to the use of power.
A further feature of invention consists in providing recesses in the table in
front of the cutter over which the edge of the pile of sheets may be advanced
so that the operator may conveniently grasp the pile by passing his fingers into
said recess.
Other features of invention relate to combinations and constructions which
will be referred to hereinafter and particularly pointed out in the claims.
In the drawings:
Fig. 1 is a rear elevation of a cutter embodying all the features of the present
invention in their preferred forms.
Fig. 2 is a horizontal sectional view taken below the table.
Fig. 3 is a side elevation.
Figs. 4 and 5 are details of a part of the starting and stopping mechanism.
Fig. 6 is a detail of the clutch for operating the pusher, and
Fig. 7 is a detail of the hand recesses in the table.
Referring to the drawings in detail, the knife bar 1 is guided in vertical

page_text: slots 2 formed in the side frames 3 and is hung upon links 4 as is common in
this class of cutters. The knife bar is connected to its operating lever 5 by a
link 6 in the usual manner, and said lever is provided with a weight 7 operating
to rock said lever in a direction to move the cutter, into its raised position, and
to hold said cutter in this position until the mechanism for drawing the cutter
down is thrown into action. The clamping bar 8 is suitably guided in the
side frames 3 and is connected at each end with a rack 9 by means of a bar 91
which is bolted to the rack and to the end of the clamping bar. The clamping
bar is forced down upon the pile of sheets supported on the table 10 by mechanism
to be described which operates said bar through said rack, and said bar is raised
by means of a weighted lever 11 which is connected with one of said racks
through a link 12.
The various mechanisms of the machine are driven from a driving shaft 13
suitably mounted in the frame and having a balance wheel 14 secured to one
end thereof. A pulley 15 is secured to the shaft 13 by being bolted to the
wheel 14 and a stud 16 is secured in said pulley upon which is mounted the
loose pulley 17. The mechanism for operating the knife lever is driven from the
shaft 13 through a friction clutch 18, one member of which is secured to said
shaft and the other member of which is secured to a sleeve 19 through which
said shaft passes. The sleeve 19 is suitably mounted in the side frame 3 and
carries a pinion 20 at its outer end. The pinion 20 engages and drives a gear 21
connected with the knife operating shaft 22 by means to be described. The
cutter operating lever 5 is operated from the shaft 22 by means of a chain 23
which passes over a sprocket wheel 24 secured to said shaft and is connected with
the end of said lever by means of a hook 25 on said lever which engages one
of the links of said chain.
;
The clutch 18 is thrown into operation by power driven means which may
be thrown in to action at the will of the operator, and the clutch may also be
thrown out of action at the will of the operator to arrest the descent of the
knife and return it to its raised position. If the descent of the knife is not
stopped by the operator, then the clutch 18 is automatically released and the
knife returned after the cut is finished. Thus the knife bar may be accurately
controlled by the operator with the expenditure of very little manual power.
Any suitable mechanism may be employed for thus controlling the knife
operating mechanism, and in the machine shown a preferred form of mechanism
is shown for accomplishing this purpose which in itself embodies several features
of invention as will more definitely appear from the claims. As shown the
operating arm 26 of the main clutch 18 is arranged to be engaged by a cone 27
mounted on the shaft 13 and engaged by a yoke 28 secured to a reciprocating
operating bar or rod 29. The rod 29 is normally held in its retracted position
with the cone 27 out of engagement with arm 26 by a spring 30 interposed
between frame 3 and a collar 31 on said rod (Fig. 2). The rod is advanced to
engage the clutch 18 by a novel mechanism which embodies certain features of
invention. This mechanism consists of a rotating member, a second member
arranged to be rotated by the engagement between said members and a cam
surface on one of said members arranged to cause a longitudinal movement of
said second member when said member is held from rotation. In the construction
shown the rotating member consists of a collar or drum 32 secured to a shaft 33
which is continuously driven from the driving shaft 13 by means of a gear 34
secured to said shaft 13 and engaging a gear 35 secured to shaft 33. The
drum 32 is provided with a series of inclines or cams 36 which engage a series
of corresponding inclines 37 on a second drum 38 loosely mounted on the shaft 33
and yieldingly held against the drum 32 by a sleeve 39 which surrounds
shaft and is formed on the end of an arm 40 projecting laterally from a
sleeve 41 mounted on rod 29. The sleeve 41 is loosely mounted on rod 29 and
is held in place by a collar 42 pinned to said rod. The drums 32 and 38 normally
rotate in unison by reason of the engagement of the cam surfaces 36 and 37.

page_text: When the rod 29 is to be advanced to engage clutch 18 the rotation of drum 38
is arrested and said drum is then moved longitudinally by the action of the cam
surfaces, and through the connections described this longitudinal movement is
transmitted to rod 29. When the rod 29 is advanced it is held in its advanced
position by means of a catch in the form a locking lever 43 which engages a
collar 44 secured to rod 29 and holds said rod against the tension of spring 30.
The lever 43 is torced in a direction to move it into the path of the collar 44
by means of a spring 45 connected at one end with an arm 46 extending down
from said lever and at the other end to an arm 47 secured to rod 29. When
the rod is in its retracted position the lever 43 is held down against the tension
of the spring by the collar 44 as shown in Fig. 1.
The lever 43 may be rocked to release rod 29, and thus throw the knife
operating mechanism out of operation, either by the operator or automatically
when the cut is finished. The mechanism shown for tripping said lever auto-
matically consists of an arm or lever 49 (Fig. 4) secured to the shaft 50 to which
said lever is secured and having its end arranged in the path of the knife lever
so that when said lever has been raised to a certain position it will strike said
arm and rock shaft 50 and lever 43. The mechanism shown for tripping said
lever 43 at the will of the operator will be described in connection with the
mechanism for arresting the rotation of drum 38.
.
The drum 38 is held from rotation at the desired time by means of a stop 51
formed on the end of a lever 52 and arranged to be moved into the path of
one or more shoulders 53 on drum 38. The shoulders 53 are formed by ribs
and 5. The
projecting from the periphery of the drum 38 as shown in Figs.
stop lever 52 is connected by means of a link 54 with an arm 54' secured to
a rock shaft 55 at the front of the machine. A hand lever is secured to the
shaft 55 within convenient reach of the operator, and is normally held in position
to hold lever 52 away from drum 38 by a spring pressed pin 56, the V-shaped
end of which rides over the end of an arm 57 projecting from the shaft 55'.
The inclines 36 and 37 are preferably of such shape that the rod 29 will be
advanced far enough to bring the collar beyond the end of lever 43 before
said inclines have passed. each other, and a cam is preferably carried by the
drum 38 for disengaging the stop before said inclines have passed each other,
so that said inclines are always in engagement. Such a cam is shown at 58
arranged to force the stop 51 back after the drum. 38 has moved a certain
distance. In the construction shown the lever 55 is also employed to trip the
locking lever 43 at the will of the operator in the following manner.
An arm
59 is connected with the lever 52 and the end of said arm is connected by means
of a link or rod 60 with the rear end of lever 43, the arrangement being such
that when the lever 55 is moved in the direction of the arrow (Figs. 3 and 4)
the arm 59 is lifted to trip the lever 43 and throw the knife operating mechanism
out of operation. When the lever 55 is moved in the opposite direction to throw
the knife operating mechanism into action the rod 60 is free to slide through
the end of lever 43. Means are preferably provided for positively starting the
rod 29 back when the lever 43 is tripped so that tendency for the bar to fail
to start will be overcome and the action of the spring 30 be made more sure
and positive. A. further advantage of such a means is that it enables the use of a
lighter spring 30 and makes the operation of the parts more sensitive. This
means preferably consists of a link 61 pivoted to the end of arm 47 and provided
slot 62 in which rides a pin 63 on the arm 46 referred to. The length of
slot 62 is such that when lever 43 is rocked to release rod 29 the pin 63 will
engage the end of said slot and draw the rod 29 back a short distance. The
engagement of the pin 63 with the end of the slot 62 does not occur until the
lever 43 has moved out of engagement with the collar 44.
with
The movement of the rod 29 also throws into and out of action the mechanism
for operating the clamping bar in the following manner. The clamping bar is.
operated through a shaft 64 which carries pinions 65 engaging racks 9.
A

page_text: clutch 66 is mounted on the shaft 64, one member of said clutch being fast to
said shaft, and the other member being formed in a driving gear 67.
The
operating arm 68 (Fig. 1) of said clutch is operated by a cone 69 on the shaft 64,
said cone being connected with the rod 29 by a yoke 70. When rod 29 is
advanced the clutch 66 is engaged and the clamping bar forced down upon the
paper, and when said rod is retracted, said clutch is disengaged and the clamping
bar is raised by the weighted lever 11. The mechanism for operating the
clamping bar is driven by a friction driver or clutch and the friction of said
driver is increased as the resistance to the knife increases so that the paper will
be clamped with a pressure proportional to the resistance to the knife. In the
construction shown the friction driver is mounted on the knife operating shaft
and consists of two friction cones 71 and 72 keyed to the shaft 22 and a
sleeve 73 provided with conical recesses in its ends for engaging said cones.
The driver is connected with the gear 67 by means of a gear 74 formed on
sleeve 73 and an intermediate gear 75 which engages gear 67 and gear 74. The
cone 71 is pinned to the shaft 22, but the cone 72 may move longitudinally on
said shaft to vary the friction between the parts of the driver. The hub of
cone 72 forms one part of the coupling for connecting the gear 21, heretofore
described, with the shaft 22. The other part of said coupling consists of a
sleeve or drum 76 keyed to the sleeve 77 which passes through the frame 3
and forms the hub of gear 21. The parts of the coupling are connected together
by means of inclines 78 which form clutch faces for causing the one part to
drive the other, and also form cams tending to force the parts of the coupling
away from each other which force will increase as the resistance to the rotation
of the driven part of the coupling increases. Since the knife is forced through
the paper by the rotation of shaft 22 which is keyed to the cone 72, and said
cone is driven by the engagement of the cam surfaces 78, said cone will be
forced longitudinally with a pressure increasing as the resistance to the knife
increases. The pressure between the cones 71 and 72 and the sleeve 73 will
therefore increase with the resistance to the knife, causing increased friction
between the parts of the driver which operates the clamp and therefore forcing
the clamp more firmly upon the paper. There should be sufficient friction
between parts of the friction driver to bring the clamp down upon the paper in
advance of the knife and this friction may be regulated to increase or diminish
the force with which this initial clamping is done by adjusting the normal
pressure between the parts of the friction driver. The means shown for effecting
this adjustment consists of a nut 79 which engages a screw thread on the
end of shaft 22. This nut is provided with an arm 80 which carries a pin Sl
arranged to engage any one of a series of holes formed in a place 82 keyed to
the shaft 22. By turning said nut the shaft 22 may be moved longitudinally
to draw the cones 71 and 72 and sleeve 73 more or less firmly together.
It is sometimes desirable to bring the clamp down upon the paper without
throwing the knife into operation, and with the present invention this is effected
by power driven mechanism which is thrown into and out of operation at the
will of the operator. The preferred form of such a mechanism consists of a
frictional driven gearing for connecting the shaft 64 with a constantly running
shaft such as shaft 33. As shown the shaft 33 carries a friction pulley 83
which is arranged to be engaged by a friction pulley 84 carried on a lever 85
which is pivotally mounted on the shaft 64. A pinion 86 is connected with
pulley 84 and engages a gear 87 secured to the shaft 64.
The lever 85 may
be rocked to carry the pulley 84 into engagement with pulley 83 by connecting
the end of said lever with an armı SS secured to a rock shaft 89. The arm SS
is weighted to hold the pulley 84 normaily away from the pulley 83. The rock
shaft 87 is provided with an arm 90 which is connected by means of a link 91
with one arm of a rock lever 92, the other arm of which is connected by a
rod 93 with a treadle 94 located in a convenient position at the front of the

page_text: machine. By pressing down the treadle the operator causes the clamp to be
brought onto the paper at will.
The paper .to be cut is supported upon the table 10 and the size of the sheets
cut is regulated by a back guage 95.
In order that the pile of sheets may be conveniently removed by the operater
after they have been operated upon by the cutter, means are provided for
advancing the pile of sheets under the cutter. This means preferably consists
of a pusher which may be advanced and quickly returned to its normal position.
This pusher preferably forms the back guage as well as the means for advancing
the pile of sheets, although it will be understood that the back guage and
pusher may be separate devices if desired and movable, independently of cach
other. It is desirable that the adjustment or setting of the back guage with
relation to the cutter should be maintained in order that the sheets formed by
successive cuts may be the same size, and when the pusher and back guage are
one and the same, the guage is preferably secured to a slide which normally
engages a fixed stop. The back guage is also preferably adjusted by moving said
guage with relation to said slide.
It is also preferred to operate the means for advancing the cut sheets under
the cutter by power driven mechanism which may be thrown into operation at
the will of the operator although said means may be manually operated. if
desired. In the machine illustrated the back guage is utilized to push forward
the cut sheets and is then returned to its former position so that the setting
or adjustment of said guage relative to the knife is not altered.
In order that the guage 95 may be thus used it is connected with a slide 96
mounted in guides 97 under the table. This slide normally stands in a definite
position with its end abutted against a stop 98 on the table. Said slide may be
held against said stop by a spring 99. The back guage is set for the size of
sheets to be cut by adjusting said guage relative to said slide and
the setting of said guage will not be effected therefore by the
operation of pushing the cut sheets forward since said slide is always returned to
the same position. The guage is guided by a slot 100 in the table, and is
provided with depending arms 101 to which the ends of a cable 102 are secured.
The cable passes around a pulley 103 at the rear of slide 96 and a drum 104
at the front end of said slide. A hand wheel 105 is connected with drum 104
by turning which the back guage may be adjusted. A graduated tape. 106 also
has its ends secured to the arms 101, and passes over pulleys at the ends of the
slide 96. The graduations on the tape are so arranged that the adjustment of
the back guage may be read at the front of the machine. The drum 104 may
be clamped to hold the back guage in its adjusted position by a clamping
handle 107.
In the machine shown the power for operating the slide 96 is taken from the
shaft 33 by a mechanism which in itself embodies certain features of invention.
This mechanism embodies a continuously rotating clutch member and a second
clutch member which carries a cam for positively throwing the members into
engagement and a second cam for throwing the members out of engagement after
the clutch has made a single revolution. The continuously rotating clutch
member 108 is secured to the end of shaft 33 and the second clutch member 109
is keyed to slide on the end of a short shaft 110 mounted in a bracket 111 and
arranged in line with the shaft 33. The shaft 110 has a crank arm 112 secured
to its other end which is connected by means of a rod 113 with the slide 90.
The member 109 carries a cam 114 (Fig. 6) arranged to be moved into position
to engage an abutment in the form of a pin 115 when said member is moved
toward the member 108. A slight movement of the member 109 brings the
teeth of the clutch into engagement so that member 109 will rotate with
member 108 and the rotation of member 109 causes the cam 114 to ride against
pin 115 forcing the teeth of the clutch members positively into engagement.

page_text: When the member 109 has made a single revolution a cam 116 on said member
rides against a second abutment 117 and forces member 109 back and positively
disengages the clutch. members. It is preferred to connect cams 114 and 116
by a rib 118 which runs between the pins 115 and 117 and positively holds the
clutch members in engagement during the rotation of member 109. During the
single rotation of shaft 110 thus effected, the crank arm 112 acts to advance
the slide 96 and return it to its normal position. The clutch member 109 is
given its initial longitudinal movement by a lever 119, one end of which rides
in an annular groove 120 formed in the hub of member 109. The other end.
of said lever is connected by means of a link 121 with an operating lever 122
located at the front of the machine. Thus by rocking the lever 122 the operator
may cause the pile of cut sheets to be quickly advanced under the knife where
they may be readily grasped by the hands and removed. The table 10 may be
and preferably is provided with recesses 123 in front of the knife over which
the edge of the pile lies when advanced so that the hands may be readily inserted
under the pile in removing the same.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, as communicated
to me by my foreign correspondent, 1 declare that what I claim is:-
-Operating the clamp of a paper cutter by means of friction which is
automatically regulated by the resistance to the knife.
2-A paper cutter in which the clamp is forced on to the pile of sheets by
the action of friction which is automatically regulated according to the resistance
to the knife.
3-A paper cutter provided with a friction driver for operating the clamp, and
mechanism for automatically regulating the friction of said driver by the
resistance to the knife.
4-A paper cutter provided with a knife-bar, mechanism for operating said
bar embodying a two-part coupling the parts of which are provided with one or
more engaging inclines, a clamping bar, and mechanism for operating said
clamping bar embodying a friction driver the parts of which are forced together
by the action of the inclines on said coupling.
5-In a paper cutter, the combination with the knife-bar, of mechanism for
operating the same embodying a two part coupling or clutch, the parts of which
are provided with one or more engaging inclines, a clamping bar, operating
mechanism therefor embodying a friction driver arranged to receive the direct
thrust of said coupling.
:
G-In a paper cutter, the combination with the knife-bar, of a two part
coupling or clutch, connections between one part of said coupling and said
knife-bar, means for driving the other part of said coupling, one or more cam
surfaces forming the connections between the parts of said coupling, a clamping
bar, a friction driver for operating said clamping bar arranged to hold the parts
of said coupling in engagement.
In a paper cutter, the combination with a knife operating shaft, a clamping
bar, a driver therefor consisting of one or more friction cones connected with
said shaft, a sleeve our said shaft having corresponding cone or cones, gearing
between said sleeve and clamping bar, a two part coupling or clutch, means for
rotating one of said parts, means for connecting the other part to said shaft,
one or more cam surfaces connecting the parts of said coupling, and a connection
between said driver and coupling whereby the parts of said driver are forced
.together by the longitudinal movement of one of the parts of said coupling.
8 The combination with a shaft, of a friction cone 71 secured thereto, a
sleeve 73 having a corresponding conical surface, a driving gear carried by said
sleeve, a part keyed to slide on said shaft and engaging said sleeve, a rotary
part held from longitudinal movement, and cam surfaces as 78 connecting the
rotary and sliding parts.

page_text: 9-The combination with a shaft, of a friction cone 71 secured thereto, a
cone 72 keyed to slide thereon, a sleeve 73 between said cones and provided with
conical engaging surfaces, a driving gear connected with said sleeve, a rotary
part 76, and cam surfaces 78 connecting part 76 and cone 72.
10 In a paper cutter, the combination with the knife-bar and clamping bar,
of a friction driver for operating the clamping bar, means for regulating the
friction by the resistance to the knife, and a clutch for connecting said driver
with and disconnecting it from said clamp.
11-In a paper cutter, the combination with the knife-bar and clamping bar;
of a friction driver for operating the clamping bar, means for regulating the
friction by the resistance to the knife, and means for adjusting the initial friction
of said driver.
12-In a paper, cutter, the combination with the knife-bar and clamping bar,
of mechanism for operating the cutter bar embodying a two part coupling con-
nection between one of said parts and the cutter bar, cam surfaces connecting the
parts of said coupling, a friction driver for operating the clamping bar arranged
to resist the separation of the parts of said coupling, and means for adjusting the
friction of said driver.
13 In a paper cutter, the combination with a shaft 22 for operating the
knife-bar, friction cone 71 secured thereto, sleeve 78 having a conical surface
engaging cone 71, a clamping bar gearing between sleeve 73 and said bar, a
part keyed to slide on shaft 22 and engaging said sleeve, a rotary part, cam.
surfaces connecting said sliding and rotary parts, and a nut on the end of shaft 22
for drawing said cones and sleeve together.
14-The combination with shaft 22, cone 71. sleeve 73, cone 72 having cam
surfaces 78, drum 76 having cam surfaces 78, sleeve 77, gear 21 connected
thereto, arm 82, nut 79, arm 80, and pin 81.
15 In a paper cutter, the combination with a shaft 22 for operating the
knife-bar, friction cone 71 secured thereto, sleeve 73 having a conical surface
engaging cone 1, a clamping bar, gearing between sleeve 73 and said bar,
a part keyed to slide on shaft 22 and engaging said sleeve, a rotary part as 76
and cam surfaces as 78 connecting said sliding part and part 76.
16 In a paper cutter, the combination with a shaft 22 for operating the knife-
bar, friction cone 7.1 secured to said shaft friction cone 72 keyed to slide on said
shaft, a sleeve 73 between said cones and provided with conical engaging surfaces,
a clamping bar, gearing between said bar and sleeve, a rotary part as 76, and cam
surfaces as 78 connecting part 76 and cone 72.
17 In a paper cutter, the combination with the knife-bar and clamping bar,
of mechanism for operating said knife-bar embodying a clutch, a friction driver
operating said clamping bar, gearing connecting said driver and clamping bar
embodying a clutch, means for simultaneously operating said clutches, and
means for regulating the friction of said driver by the resistance to the knife.
18 In a paper cutter, the combination with the knife-bar, of mechanism for
operating the same, power driven mechanism for throwing said operating
mechanism into operation, and means for throwing said power driven mechanism
into operation at will.
19 In a paper cutter, the combination with the knife-bar, of mechanism for
operating the same, power driven mechanism. for throwing said operating
mechanism into operation, means for throwing said power driven means into
operation at will, and mechanism for throwing said operating mechanism out
of operation automatically.
20 In a paper cutter, the combination with the knife-bar of mechanism for
operating the same, power driven mechanism for throwing said operating
mechanism into operation, means for throwing said power driven mechanism into
operation at will, mechanism for throwing said operating mechanism out of
operation automatically, and means for throwing said operating mechanism out
of operation at will,

page_text: 21-In a paper cutter, the combination with the knife-bar, of a clutch through
which said bar is operated, power driven mechanism for engaging said clutch,
means for throwing said power driven mechanism into operation at will,
a latch for holding said clutch in engagement, and means for tripping said latch
at will to release said clutch.
22 In a paper cutter, the combination with the knife-bar, and its operating
lever, of mechanism for operating said lever, power driven mechanism for throwing
said operating means into action, a latch for holding said mechanism in action,
and means operated by the operating lever for tripping said latch.
23-In a paper cutter, the combination with the knife-bar, and operating lever,
of mechanism for operating said lever, a latch for holding said mechanism in
action, a rock shaft carrying said latch, an arm connected to said shaft and
arranged in the path of said lever.
24 In a paper cutter, the combination with the main clutch, of mechanism
for operating the same comprising a rotating member, a second member driven
by engagement with said rotating member, one or more cam surfaces on one
of said members for causing a longitudinal movement of said second member
when said member is held from rotation, and means for preventing the rotation
of said second member at will.
25 In a paper cutter, the combination with the main-clutch, of mechanism
for operating the same comprising a rotary member, a second member driven by
engagement with said rotary member, one or more cam surfaces on one of said
members for causing a longitudinal movement of said second member when said
member is held from rotation, one or more shoulders on said second member
a stop for engaging the same, and means for operating said stop at will.
26 The combination of a rotary member, a second member driven by
engagement therewith, one or more cam surfaces on one of said members for
causing a longitudinal movement of said second member when said member is
held from rotation, and means for preventing the rotation of said second member.
27 The combination of a rotary member, a second member driven by engage-
ment therewith, one or more cam surfaces on one of said members for causing
a longitudinal movement of said second member when said member is held
from rotation, one or more shoulders on said second member, and a movable stop
for engaging the same.
:
28 The combination of a rotary member, a second member driven by engage-
ment therewith, one or more cam surfaces on one of said members for causing
a longitudinal movement of said second member when said member is held
from rotation, one or more shoulders on said second member, a movable stop for
engaging the same, and one or more cams on said second member for disengaging
said stop.
29 In a paper cutter, the combination with a clutch operating rod, of a spring
for retracting the same, a rotating drum 32, a second drum 38, engaging
inclines 36 and 37 on said drums, connections between drum 38 and said operating
rod, shoulders 53 on drum 38, a movable stop for engaging the same, a locking
lever 43 for holding said operating rod advanced, and means for tripping said
lever.
:
30 In a paper cutter, the combination with a clutch operating rod, a spring
for retracting the same, mechanism for advancing said rod, a latch for holding
said rod advanced, means for tripping said latch, and means positively starting
said rod rearward.
31-In a paper cutter, the combination with the knife-bar and operating lever,
of mechanism for operating said lever, a latch for holding said mechanism in
action, a rock shaft carrying said latch, an arm carried by said rock-shaft and
arranged in the path of said lever, and connections between said latch and a
hand lever.
32 In a paper cutter, the combination with the knife-bar, of mechanism for
operating the same, power driven mechanism for throwing said operating

page_text: mechanism into operation embodying two rotary members connected by engaging
inclines, a stop lever 52 for holding one member from rotation, a lever 43
for holding said operating mechanism in action, a lever 55 and connections
between said lever and levers 52 and 43.
33 In a paper cutter, the combination with the knife-bar and clamping bar, .
of mechanism for simultaneously operating the knife-bar and clamping-bar,
power driven mechanism for bringing the clamping bar down upon the paper
independent of the operation of the knife-bar, and means for throwing said
power operated mechanism into action at will.
n
34 In a paper cutter, the combination with the knife-bar, and clamping-
bar, of mechanism for simultaneously operating the knife-bar and clamping-bar,
frictional gearing for operating said clamping-bar independently of said knife
bar, and means for throwing said gearing into operation at will.
ן*
.
35 In a paper cutter, the combination with the clamping-bar, of an operating
shaft connected therewith, a lever pivotally mounted thereon, a friction pulley
mounted on said lever, and geared to said shaft, a constantly running friction
pulley, and means for moving said lever at will to engage said pulleys.
36 A paper cutter, provided with means for advancing a pile of cut sheets
under the knife without altering the setting of the back guage.
37 A paper cutter provided with a pusher for advancing a pile of cut sheets.
under the knife, and means for operating said pusher without altering the
setting of the back guage.
38 A paper cutter provided with a back guage which may be operated to
advance a pile of cut sheets under the knife without altering the setting of
the guage.
39 In a paper cutter, the combination with the knife-bar, of a back guage,
means for advancing the pile of cut sheets under the knife-bar without altering
the setting of the back guage, a power operated driver for said means, and means
for throwing said driver into operation at the will of the operator.
40 In a paper cutter, the combination with the knife-bar, of a pusher for
advancing the pile of cut sheets under the knife, a crank connected with said
pusher, a driver for operating said crank, and means for throwing said driver
into action at will.
41-In a paper cutter, the combination with the knife-bar, of a pusher for
advancing the pile of cut sheets under the knife, mechanism for operating said
pusher comprising a rotating clutch member, a second clutch member, means
for disengaging said members after a single revolution of said second member,
and means for engaging said members at will.
42-In a paper cutter, the combination with the knife-bar, of a pusher for
advancing the pile of cut sheets under the knife, mechanism for operating said
pusher comprising a rotary clutch member, a second clutch member, a cam on
said second member for disengaging said member after a single revolution, an
abutment in the path of said cam, and means for engaging said members at
will.
43 In a paper cutter, the combination with the knife-bar, of a pusher for
advancing the pile of cut sheets under the knife mechanism for operating said
pusher comprising a rotating clutch member, a second clutch member, a cam
on said second member for moving said member toward said rotary member, a
cam on said second member for disengaging said members, abutments in the
paths of said cams, and means for moving said second member towards said
rotary member at will.
44 The combination of the rotary member 108, the longitudinally movable
member 109, cams 114 and 116 carried by member 109, abutments 115 and 117
and means for moving member 109 towards member 108.
45 The combination of the rotary member 108, the longitudinally movable
member 109, cams 114 and 116 carried by member 109, a web 118 connecting said

page_text: cams, abutments 115 and 117, and means for moving member 109 towards
member 108.
46-A paper cutter having a slide to which the back guage is adjustably
connected, and means for advancing said slide and returning to its normal
position.
47 In a paper cutter, the combination with a slide, of a back guage adjustably
connected with said slide, mechanism for automatically advancing said slide and
returning the same to its normal position, and means for throwing said mechanism
into operation at will.
48 In a paper cutter, the combination with a slide, of a back guage adjustably
connected with said slide, of a clutch, means for engaging said clutch at will,
means for automatically disengaging said clutch, and mechanism driven by
said clutch for advancing said slide and returning same to its normal position.
49 In a paper cutter, the combination with a slide, of a back guage adjustably
connected therewith, a crank connected with said slide, mechanism thrown into
operation at will for giving said crank a single revolution.
50-Means for adjusting the back guage and indicating the position of the
same consisting of cable wound about a drum and passing around a guide, and
a graduated tape connected to the back guage and passing over guides.
51-A paper cutter provided with recesses or pockets in the table in front of
the knife-bar for admitting the fingers to lift the stock.
Dated this 26th day of Cantonhon 1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.