Improvements in Cutting Machines for Trimming Books, Circulars, and the like.
Year: 1894

page_text: Date of Application, 18th Dec., 1894-Accepted, 9th Feb., 1895
COMPLETE SPECIFICATION.
•
Improvements in Cutting Machines for Trimming Books, Circulars,
and the like.
We, CHARLES SEY BOLD, of Dayton, Montgomery County, State of Ohio,
United States of America, Manufacturer and THE SEYBOLD MACHINE COMPANY,
a corporation having its principal office at Dayton aforesaid, Manufacturers of
Bookbinders' Machinery, do hereby declare the nature of this invention and in what
mauner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
The primary object of our invention is to provide a machine for trimming
bundles of paper into book form, the said machine being so constructed as to clamp
the bundle to be trimmed in proper position and afterward to automatically trim
or cut each side of the bundle consecutively without stopping the machine, the
latter being so constructed as that it will stop automatically after having made the
fourth or last cut, as will more fully hereinafter appear.
In the accompanying drawings,
Figure 1 is a front elevation of a machine embodying the features of our invention,
the length of the machine as shown in comparison to the height thereof being
about one-third longer than what the machine is actually built.
Fig. 2 is a horizontal section taken on the dotted line 22 of Fig. 1, showing the
top portion of the bed-plate, clamp-table, and operating mechanism.
Fig. 3 is an end elevation taken at left hand in Fig. 1, showing the preferred
form of mechanism for causing the knife-carriage to automatically move back and
forth on the bed-plate, the upper portion of said knife-carriage and clamping
mechanism being broken away.
Fig. 4 is a vertical section taken on the dotted line 4 4 of Fig. 1, looking toward
the right hand in said figure, showing the preferred means for securing the clamp-
serew and its connecting parts in proper position, and also the preferred means for
automatically rotating the clamp-table a partial rotation at certain determinate
intervals.
Fig. 5 is an end elevation of the machine shown at right hand in Fig. 1, the
dotted lines showing the position of the knife-carriage when the latter has travelled
forward in position for the knife to trim one side the bundle of papers held to
place in the clamp.
Fig. 6 is a section taken on the dotted line 6 6 of Fig. 4, being a top view of the
clutch mechanism for imparting a rotary motion to the clamp-screw in either
direction and of the mechanism for automatically rotating the clamp-table a partial
rotation at certain determinate intervals.
Fig. 7 is a side elevation of a part of the lever for automatically stopping the
machine and its connecting parts, the dotted lines showing said lever elevated, in
which position the machine does not operate.
Fig. 8 is a vertical section taken through the knife-bed, knife, and the vertical
cross-plate of the knife-carriage, showing one of the rollers which support the knife-
bed in position in the inclined groove in the cross-plate.
Our improved machine for trimming bundles of paper into book form is
preferably constructed as follows:
The operating mechanism is supported and journaled in suitable frame-work A
and brackets attached thereto, said frame-work being covered with a suitable bed-
plate A', attached thereto, the rear extensions G of the bed-plate being supported
by the brackets A², as shown.
The mechanism for clamping the bundle of paper in position to be cut is

page_text: preferably constructed as follows: The clamp-screw B is held in position by means
of a washer b, (see Fig. 4,) interposed in a circular recess in the top of sleeve B',
directly beneath the clamp-table C, as shown, the said sleeve B' having an enlarged
circular head B resting in a circular countersunk portion of the bed-plate A', the
table C being connected to said enlarged head of the sleeve, as shown in Fig. 4.
To the lower end of screw-rod B is secured the miter-wheel B³, which latter
engages with the corresponding miter-wheels B B+, placed on the main shaft B',
and held to place by means of the set-collars ', as shown in Figs. 1 and 6. To the
clamp-table C are connected the vertical guides CC, between which the screw-
clamp C* travels up and down on the screw-rod as the latter is rotated in either
direction. To the clamp C is bolted or otherwise suitably secured the pattern or
form plates C, the latter being made of varying sizes to conform to the size of book
desired to be trimmed. To the main shaft B and between the miter-wheels B* is
secured the friction-clutch B, the latter having a feather-and-groove connection
with said shaft to permit said clutch to be moved horizontally thereon. The
clutch B has a central circular recess, in which the bifurcated portions of bar B
rest, as shown in Fig. 6. The clutch-bar B7 has a rod B8 passing through it, as
shown by section in Fig. 4, and also shown in Fig. 6, the outer end of said bar
passing through an elongated opening in the cross frame, (see Fig. 1,) the outer
end of said bar operating in a vertically-elongated opening in the extension of
the foot-treadle B, as shown in Figs. 1 and 4. This foot-treadle is pivoted to the
downward extension A³ of the cross-frame A, as shown in Fig. 1. The rod B is
suitably connected to the end frames of the machine, suitable spiral springs being
interposed around said rod between the end frames and the clutch-bar B' in order
to retain the clutch centrally between the miter-wheels B at all times, except when
operated by means of the foot-treadle.
Having described the preferable construction of the mechanism for clamping the
paper to be trimmed on the clamp-table we will now describe the operation of this
part of the machine.
The bundle or bundles of paper to be trimmed are placed on the table C (said
table preferably being provided with the wooden covers C shown in Fig. 1) at
either side of the guides C', after which the form plate C, attached to the clamp-
plate C³, is brought down on said bundles of paper by placing the foot on one side of
the treadle, which causes the clutch B to slide on the revolving shaft B and engage
one of the miter-wheels B', which lutter causes the miter-wheel B and with it the
screw-rod B to rotate. The rotation in one direction of this screw-rod B causes
the clamp C² and with it the form-plate C³ to descend on the screw-rod and firmly
clamp the paper in position on the table C. It will be seen that we are enabled to
clamp two bundles of paper at one time, one on each side of the guides C. The
pressure is kept on the foot-treadle until the paper is firmly clamped to place, after
which the pressure is released, and the clutch B will be thrown back in its normal
position away from the miter-wheel by means of the coiled spring on rod B. After
the bundles of paper have been trimmed (in the manner hereinafter stated)
pressure is put on the opposite side of the treadle, which will cause a reverse
revolution of the screw-rod, thus causing the clamp-plate C2 and its form-
plate C to travel up said rod, when the bundles of trimmed paper may be
removed.
Having described the preferable form of mechanism and its operation for
clamping the bundles of paper in position to be trimmed we will now describe the
preferable form of mechanism for automatically driving the koife-carriage and its
knife up to and away from the bundles of paper and for operating said knife and
the clamp-table, and also for automatically stopping the machine at certain
determinate intervals.
To the main shaft B' are secured the usual tight and loose pulleys D and D', a
suitable clutch-pinion D being loosely secured to said shaft in the usual manner for
engaging or disengaging the clutch D³ with the tight pulley D by means of
lever D, the object of this mechanism being to permit of a constant revolution

page_text: of shaft B' and pulley D without imparting motion to the pinion D³,
excepting when desired to operate the machine. This part of the mechanism
is old and well known for transmitting power, and does not constitute any
feature of our invention, excepting in connection with other mechanism herein-
after described. The shaft B is provided on its opposite end with the usual
balance-wheel D. The clutch-pinion D2 meshes with the large gear E, which
latter is keyed to one end of the auxiliary shaft El, the latter being suitably
journaled in the end frames of the machine. To the outer central face of gear É
is cast the face cam E³, against which the roller e, pivoted in the lower end of
lever Es, rotates. As the cam is rotated the roller is made to travel outward over
the inclined face e¹ of the cam, forcing the lower portion of the lever outward and
the upper portion of the lever inward and downward, and with it the knife-bed, as
will more fully appear. So soon as the roller e has reached the outermost point on
the cam said roller is made to travel back down the inclined face e into the inner-
most recess between said faces of the cam by means of the spring connected to the
knife-bed, as will more fully hereinafter appear.
To the inner face of the gear E, and around its journal-bearing, is cast the
pinion E, as shown in Fig. 7 and by dotted lines in Figs. 4 and 5, said pinion
meshing with the gear E', which latter is journaled on a stud projecting outward
from the downward extension A' of the frame, as shown in Figs. 4 and 5. The
pinion E, cast with the gear E, is one-fourth the diameter of gear E³, with which
it meshes, in order that four revolutions of the auxiliary shaft E will produce one
revolution of the gear E. To the inner face of gear E and near its outer edge, is
cast a luge (see Figs. 5 and 7,) which lug as the gear is rotated comes in contact
with the extension of lever F, as shown in Fig. 7, and raises the outer end of
said lever, the latter being pivoted at its rear end to the frame, as shown at f¹
in Figs. 4 and 5. The outer end of lever F oporates in the bracket f. (Shown in
Fig. 5.)
As shown in Figs. 1 and 2, the lever D' has a pin d connected thereto, which pin
is held against the outer face of lever F when the machine is in operation and in
the opening (see Fig. 7) when the machine is stopped, said pin being held to
position by means of a spring d', attached to the lever D' and to the frame of the
inachine.
To start the machine the lever D is pulled inward, which causes the clutch
to engage with the tight pulley, and the pin d is drawn out of the opening f³
in lever F, permitting the outer end of said lever F to drop down in the
bracket f³, in which position the pin d is held against the outer face of lever F
just above the opening, as shown by dotted line in Fig. 7, by means of the
spring . The clutch is held in position in contact with the tight pulley by
reason of the pin d bearing against the face of lever F, which causes the
clutch-pinion D³ to impart motion to gear E, and as gear E is rotated the
pinion E connected thereto rotates and with it the gear E. The pinion E
being one-fourth the diameter of gear E, it will take four revolutions of said
pinion to accomplish one revolution of said gear, and so soon as the pin e³ on
gear E comes in contact with the inclined face of lug on lever F the outer end
of said lever is elevated, as shown by dotted lines in Fig. 7, in which position the
pin don lever D is drawn into the opening f3 by means of spring d', which
operation draws the clutch away from the tight pulley and stops the operation of
the machine.
It will be seen that the machine is stopped automatically at every fourth revolu-
tion, the number of revolutions to be given the auxiliary shaft before stopping the
machine being governed by the size or number of cogs on pinion E, which may be
varied, if desired. The object of this arrangement for automatically stopping the
machine at each fourth revolution of the auxiliary shaft is to permit of the trimmed
bundles being removed, each revolution of the auxiliary shaft trimming one side of
the bundle, as will more fully hereinafter appear.
The knife G is secured to the knife-bed G' by means of bolts g, passed through

page_text: the knife and resting in a countersink in such a manner as that the head of each
bolt will come flush with the outer face of the knife, said bolts passing through the
elongated openings a in the lower portion of the knife-bed G', as shown in Fig. 8.
The knife is adjusted vertically on its bed by means of the set-bolts g, after which
the nuts on the bolts 9 are tightened. Between the outer upward extension g²
of the knife-bed is secured the rod G, around which is secured a stiff spiral
spring g', interposed between the lug g' and lug g, the latter being loosely connected
to said rod, the said lug having the roller g pivotally connected to a stud thereon,
as shown in Fig. 1. This roller g has the side circumferential flanges which
engage the outer and inner face of guide G³, against which said roller impinges
and rotates as the knife-bed is raised or lowered. The knife-bed is held in place
between the vertical guide-plates G³ and the rear vertical guide plate G of the
carriage in an elevated position by means of the spring, which is compressed
around the rod G2 between the stationary lug g and the sliding lug g³, connected
to roller g. To the rear of the bed-plate is connected suitable lugs on which the
rollers g rotate, the latter rotating against the lower face of the elongated inclined
grooves in the rear plate G, as shown in Fig. 8 and by dotted lines in Fig. 1.
When the knife-bed is forced downward, the rollers g³ travel down the face of said
inclined grooves, said knife-bed being elevated again by the tension of spring g³
against the lug 9, the latter travelling up with its roller grotating against the
guide-plate G. The knife-carriage is made up of vertical end plates G', guide
plates G³, rear cross-plate G, and rearward extensions G. This carriage is
upheld and travels upon the rollers G', which latter rotate upon suitable spindles
connected in any desired manner to the frame of the carriage, said rollers
rotating and travelling upon the bed-plate A' and the rear extensions thereof,
as shown. The carriage is retained to the frame and bed-plate by means of the
wedge-shaped projections Gs on the carriage engaging a similar recess G³ in the
sides of the end frames, as shown by dotted lines in Fig. 1.
Having described the preferred construction of the carriage, knife-bed, and
knife and their connecting parts, we will now describe the preferred means, as
shown, for operating the knife-bed and its knife, which is as follows:
Between the extensions H, cast with the end frame A, is pivoted the lever E³, to
the lower end of which is connected the roller e, which latter rotates and bears
against the two inclined faces of the cam E2, in the manner aforedescribed. The
upper portion of this lever E' above its pivotal point is bifurcated, as shown in
Fig. 5, a suitable shaft H2 being connected to the top portions of said bifurcations,
as shown, on which shaft is placed the flanged roller H³. This roller rests and
rotates against the vertical gage H, the latter being connected to one end of the
knife-bed by means of the set-screws h, which operate in extensions of said gage
against said knife-bed, as shown in Figs. 1 and 5. The flanged roller H³ is kept in
contact with the gage at all times, and moves back and forth on the shaft as the
carriage travels forward or backward. If desired, this gage and set-screws may be
dispensed with, in which event the roller will operate against the vertical face of
the knife-bed; but it is preferred to employ said gage to assist in adjusting the
down-stroke of the knife. The operation of this portion of the machine is as
follows: The revolution of cam E causes the roller e to travel outward over its
inclined face e', thus forcing the lower end portion of lever E outward and its upper
bifurcated portion inward and downward, and with it the knife-bed and its knife,
the roller H' travelling down over the face of gage H*. So soon as the roller e on
lever E has passed the outermost point on the face el of the cam the pressure
on the knife-bed is released, and the latter, with its knife, is elevated through
the tension of spring g³, as aforedescribed, and as the knife bed and knife are
being elevated the upper portion of lever E is forced outward and its lower
portion, with the roller e, is forced inward, said roller travelling back on the
inclined face of the cam, as shown in Fig. 1, in which position it is in readiness
to begin another cut.
It is desired that the knife be not elevated higher than the thickness of paper

page_text: after being clamped in position, for the reason that the knife must strike against
the form-plate C³ as the carriage is travelling forward, as will hereinafter appear.
For the purpose of adjusting the height to which said kuife may be elevated, we
have provided the set-screw H, which operates in the bracket A', connected to the
projections H, as shown in Fig. 1, the outer end of said screw bearing against
the lever E³ below its pivotal point. Turning the screw in one direction forces the
upper portion of the lever inward and the knife is lowered, above which point it
can in no case be elevated except by turning the screw in the opposite direction,
which will permit the lower portion of the lever to move inward, and the knife will
be correspondingly elevated."
The depth of stroke to be given the knife is regulated principally by means of
the gage H', which is wedge-shaped on its inner face and rests against the inclined
outer face of the knife-bed, as shown, said gage being regulated up or down on said
knife-bed by means of the set-screws . To lower the cut the gage is elevated,
and to elevate the cut the gage is lowered.
Having described the construction of the carriage and the construction and
operation of the knife-bed and knife on said carriage, we will now describe th
preferable construction of mechanism shown for automatically operating said
carriage and its knife up to and away from the form-plate clamped on the
bundles of paper at certain determinate intervals. This, mechanism for thus.
causing the carriage to automatically travel back and forth on the rollers G',
the latter resting on the bed-plate A' and its rearward extensions, is fully shown
in Figs. 1, 2, and 3, and is as follows:
To the auxiliary shaft E', outside the frame, is keyed the disk K and toothed
seginent K', said disk being provided with the beveled toothed portion for about
one-quarter of its inner circumference, said teeth on the disk meshing with the
beveled pinion L at one side thereof, which imparts motion in one direction to said
pinion. The segment K in its rotation imparts motion to the pinion L in a
direction opposite to that imparted by the toothed portion of the disk, said segment
being so located that it will act shortly after the said toothed portion of the
disk shall have passed said pinion. The pinion L is keyed to the shaft L', to
which latter is also keyed the stop-lug L, which latter has a flat face to impinge
against the inner face of the outer bearing-faces on the disk K, said bearing
faces being so located that the flat face of stop-lug L' will bear against the bearing
faces when the teeth of said segment and disk are not in contact with said
pinion, the object being to retain said pinion in proper position to mesh with the
segment and toothed portion of the disk in their rotation. To the shaft L' is
connected the two caps L³ by means of a feather-and-groove connection, to admit
of a vertical movement to said caps, between which the pinion L* is loosely
connected to said shaft, but connected therewith by the tension of a spring L³,
interposed between the top cap L³ and nut P, suitable friction-washers being
interposed between said caps and pinion. To the outer edge of the knife-carriage
is connected the horizontal toothed rack M, in which the pinion L meshes in its
rotation in either direction. The operation of this feature of our invention is as
follows: Motion being imparted to the auxiliary shaft E', the disk K and
segment K are rotated in the same direction on opposite sides of the pinion I,
which causes an intermittent motion to be imparted to said pinion and its shaft L'
in opposite directions, one revolution of said shaft E' causing the carriage to move
forward and backward through the medium of pinion L and rack M. The
pinion L, as aforestated, is loosely connected to its shaft, being held in position
therewith between the caps L³ by means of a suitable spring. The tension of this
spring is strong enough to hold said pinion in position and to operate the carriage
back and forth; but so soon as the knife on the carriage moves up and strikes the
form-plate Con the clamp the forward movement of the carriage is stopped and
the pinion L ceases to rotate, the caps L³ rotating on said pinion until the teeth /
on the disk have passed the pinion L. So soon as the knife strikes the form-plate
it is made to descend with a shearing cut in the manner aforedescribed, and after

page_text: having made its cut the carriage and knife are carried back by means of the
toothed seginent K'. The object of having this pinion L loosely connected to its
shaft and held in position by friction is to accommodate varying sizes and
configurations of form-plates which are used to determine the size of book or
bundle to be trimmed.
We will now describe the preferable construction of the mechanism shown for
automatically imparting a partial revolution of the table on which the bundles of
paper are clamped after the carriage and its knife have receded from the form-
plate, as aforedescribed, which construction is as follows:
To the auxiliary shaft E' between the end frames is keyed the vertical disk N,
having a horizontal lug n cast to its inner face, which lug, as the disk is being
rotated, engages with one of the vertical lugs n', cast to the bottom portion of the
horizontal plate N', as shown in Figs. 4 and 6. The plate N' is keyed to the
vertical shaft N2, to which latter is also keyed the gear 0, which meshes
with a similar gear 0¹, connected to the sleeve B', (see Fig. 4,) the enlarged
head B of said sleeve being connected to the table C, on which the bundles of
paper are clamped. A portion of the outer circumferential face of disk N
near the lug n is cut away, as shown at n², Fig. 4, in order to permit one corner
of the horizontal plate N to give a quarter-turn over said disk at its cut-away
portion when the lug n on the disk comes in contact with one of the lugs n' on the
plate. The inner face of said disk impinges against one face of the plate at all
times, except at its cut-away portion, thus securely retaining said plate and the
table in position for the knife to act.
The operation of this feature of our invention for automatically imparting a
partial rotation to the clamp-table at certain determinate intervals is as follows:
A rotary motion being imparted to the auxiliary shaft, the vertical disk N is
rotated, as indicated in Fig. 4, the lug n coming in contact with one of the vertical
lugs n' on the horizontal plate N', and so soon as the two lugs come in contact the
plate N' is given a quarter turn, the corner of said plate passing over the disk at
its cut-away portion, as indicated by dotted lines in Fig. 6. Each successive
revolution of the disk gives a quarter-turn to the plate, which motion is imparted
to the table C through the medium of shaft N, gears O O¹, and sleeve B', to
which latter the gear O' and table C are connected, as shown in Fig. 4.
Having described the operation of each operative part of the machine in
connection with its preferable construction, we will now briefly describe the
operation of the machine as a whole.
The bundle or bundles of paper to be trimmed are placed on the table Cat
either side of the guides C, after which the form-plate C³, attached to the
clamp C is made to descend on the screw-rod by putting pressure on one side the
foot-treadle B', the pressure being applied until the paper is sufficiently clamped,
when the pressure is removed, causing the clutch to disengage with one of the
miter-wheels B', as aforedescribed. Having clamped the bundles of paper in
position, as shown in Fig. 5, the operator grasps the lever D', giving it a pull
inward, which starts the machine in motion. The pin d, bearing against the face
of lever F, serves to retain the clutch in contact with the tight pulley until
automatically released, as will presently appear. So soon as motion is imparted to
the auxiliary shaft E the teeth on disk K will cause the knife-carriage to travel
forward on the bed-plate, in the manner aforedescribed, until the knife G strikes
the inner face of the form-plate C³, as shown by dotted lines in Fig. 5. So soon
as the face of the knife strikes the form-plate the motion of the carriage is stopped
in the manner described, the pinion L' being held to place by friction between the
caps L. The cam E is so adjusted with reference to the disk K and segment K¹
that when the knife is brought up against the form-plate C³ said knife is inade to
descend with a shearing cut, through the medium of the knife-bed G', lever E³, and
cam in the manner aforedescribed, accurately trimming one side of the paper,
and so soon as the knife has made its cut the carriage begins to travel backward
through the medium of segment K', and the knife-bed and knife are gradually

page_text: elevated again in the manner described. The carriage and its knife having
travelled up to the form-plate, made one cut, and receded again, it is necessary
that the clamp-table, paper, and form-plate be given a quarter-turn in order to
present a new face to the knife. This is accomplished automatically by adjusting
the disk N and plate N¹ in such a position with reference to the segment K' aud
cam E as that after said segment shall have caused the carriage to travel back
and after the knife has been elevated in the manner aforedescribed the lug n on the
disk N will come in contact with one of the lugs n' ou plate N¹, which will cause
the table to be given a quarter-turn, as set forth. The inner face of the disk N
bearing against the side of the plate N¹, except at its cut-away portion, will
securely retain said table in a fixed position until the knife has again made its cut
and receded, as described.
It will be seen that it takes but one revolution of the auxiliary shaft to cause
the knife-carriage to carry the knife up to the form-plate, cut one side the
bundles of paper, elevate and carry the knife again, and give the clamp-table a
quarter-turn, presenting a new face to be trimmed. Each successive revolution
of the auxiliary shaft automatically carries the knife forward, cuts one side of the
bundle, elevates and carries the knife back away from the form-plate, and gives
the latter and the clamp-table one quarter-turn, until at the completion of the
fourth revolution of said shaft, after the four sides of the bundles have been
trimmed, the machine is automatically stopped by means of the lug e on gear Es
coming in contact with the projection f on lever F, (see Fig. 7,) which causes the
outer end of said lever to be elevated, which will cause the pin d on lever D₁ to
drop into the opening f* in said lever F by reason of the teusion of spring d',
which operation will withdraw the clutch from the tight pulley, stopping the
machine.
It is apparent that our improved machine for trimming books may be
advantageously used to trim circulars, posters, and various other articles besides
books, and may be adjusted, if so desired, to trim articles having more than four
faces by simply changing the gear E or the pinion E so that it will require
more than four revolutions of the auxiliary shaft to automatically stop the
machine.
The advantages of our improved machine for trimming books will be apparent
when the time saved is taken into consideration. The features of automatically
carrying the knife back and forth, rotating the clamp-table, and stopping the
machine all at certain determinate intervals are very valuable ones when combined
in a book-trimmer such as we have shown and described.
While the mechanism shown for accomplishing the various operations enumerated
automatically is the preferred form, any suitable operative mechanism may be
employed for automatically carrying the knife up to and away from the form-
plate, rotating the clamp-table a partial rotation, operating the knife, and stopping
the machine all at certain determinate intervals. If desired, one or more of said
features of our invention may be used in connection with book-trimmers differing
in construction from that herein specifically set forth.
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. In a machine for trimming books, the vertically-movable knife-bed and knife
suitably mounted on a travelling carriage, in combination with means, substantially
as set forth, for automatically driving said carriage forward and backward on the
bed-plate of the machine, and suitable means for clamping the bundle of paper in
position and for operating said knife, substantially as set forth.
2. In a machine for trimming books, the clamping mechanism, constructed and
operated substantially as set forth and provided with a form-plate, in combination
with a knife-bed and knife mounted in a travelling carriage in a vertically-movable
position, and mcaus, substantially as set forth, for automatically carrying said knife

page_text: up to and away from said form-plate at certain determinate intervals, and mechanism
for operating said knife, as and for the purposes set forth.
3. In a machine for trimming books, suitable mechanism for clamping the bundle
of paper between a form-plate and a table, in combination with a vertically-
movable knife mounted in a travelling carriage, and mechanism, substantially as
set forth, for automatically causing said carriage and its kuife to approach and
recede from said form-plate, and automatic mechanism for operating said knife
when it has approached said form plate and for rotating said table a partial
revolution after the knife has made its cut and receded from said form-plate, as set
forth.
4. In a machine for trimming books, constructed and operated substantially as
set forth, and in which each revolution of the auxiliary shaft will automatically
trim one side of the bundle, mechanism, substantially as described, for automatically
stopping the machine at certain determinate intervals, as and for the purposes set
forth.
5. In a machine for trimming books, adapted to operate substantially as set
forth, the means herein shown and described for automatically moving the
carriage back and forth on the bed-plate at certain determinate intervals, the
same consisting of a disk K and toothed segment K', keyed to the auxiliary
shaft E, the said disk having the_beveled_teeth around a portion of its inner
face, pinion L, shaft L', stop-lug L³, caps L³, loose pinion L, interposed between
said caps, spring L, and nut, all arranged and adapted to operate in the inanuer
set forth.
6. In a machine for trimming books, constructed and adapted to operate
substantially as set forth, the knife-bed G', having the knife G adjustably
connected thereto, said knife-bed being connected to the rear plate G³ by means
of the journaled rollers g, adapted to rotate in the inclined grooves in said
plate, a suitable coiled spring being interposed around the rod G³ between a lug g
on said bed-plate and the lug y, connected to the rollers, the latter bearing and
rotating against one of the guide-plates G³ as said knife-bed is operated, as and
for the purposes specified.
7. In combination with the knife-bed and knife mounted in a movable carriage,
and mechanism for automatically moving said carriage at certain determinate
intervals, the lever E³, pivoted to supports on the end frame, said lever being
bifurcated at its top portion, shaft H², connected to said bifurcated portions,
flanged roller H³ on said shaft and bearing against one end of said knife-bed, and
roller e, connected to the lower end of said fever, said roller e bearing against the
faces of cam E, and suitable means for rotating said cam, as set forth.
8. In a machine for trimming books, the same having a knife mounted in a
movable carriage, as set forth, and a clamp-table on which the book to be trimmed
is clamped, mechanism, substantially as described, for automatically imparting a
partial rotation of said table at determinate intervals, for the purposes set forth.
9. In a machine for trimming books, constructed substantially as set forth and
provided with a clamp-table, the means herein shown for automatically imparting
a partial revolution to said table at certain determinate intervals, consisting of a
vertical disk N, keyed to the auxiliary shaft E', said disk having a horizontal
lug n, rectangular plate N', keyed to shaft N2, said plate having the vertical
lugs n¹, gear O, keyed to shaft N³, said gear meshing with gear 01, connected to
sleeve B, to which the table C is connected, a portion of disk N being cut away,
substantially as set forth.
10. In a machine for trimming books, constructed substantially as set forth, the
mechanism herein shown and described for automatically stopping the machine at
certain determinate intervals, consisting of lever D, having a pin d connected
thereto, spring d', lever F, having an opening therein and a fug projection f
gear E, having the pinion E cast thereto, and gear E³, having a lug e³,
combined and adapted to operate as set forth.
all
11. In a book-trimming machine having a knife mounted in a movable carriage

page_text: and a clamp-table adapted to be rotated automatically a partial rotation at
determinate intervals, a suitable clamp provided with a form-plate for clamping
the book on said table and for guiding the knife, substantially as set forth.
12. In combination with a book-trimming machine having a clamp-table,
traveling carriage, and a vertically-movable knife mounted thereon, and connecting
mechanism for automatically moving said carriage, lowering the knife, and partially
rotating said table, all at determinate intervals, the clamp-screw, clamp and form-
plate connected to said screw, and suitable means for imparting a motion thereto
in either direction, as set forth.
13. The means herein shown and described for retaining the pinion L in
proper position for engagement with teeth / on disk K and the toothed segment K'
in their rotation, the same consisting of a stop-lug L', keyed to shaft L¹ just
above said pinion, said lug having a flat face bearing against the inner face of
said disk, except at the cut-away portion of said disk, as and for the purposes set
forth.
14. The means herein shown and described for retaining the clamp-table C in
fixed position, excepting at certain determinate intervals, the same consisting
of the vertical disk N and rectangular plate N', connected and operated substan-
tially as set forth, the inner face of said disk impinging against one side of the
plate, a portion of the bearing-face of said disk being cut away, as and for the
purposes set forth.
15. In combination with the vertically-morable knife bed and knife mounted in
a traveling carriage, substantially as set forth, and suitable means for operating
said knife-bed, a suitable adjusting device, as H*, adjustably connected to one end
of said knife-bed, as and for the purposes set forth.
16. In combination with the vertically-movable knife bed and knife mounted in
a traveling carriage adapted to operate substantially as set forth, and a suitable
lever, for operating said knife-bed, the means herein shown for regulating the height
of said knife-bed and knife on said carriage, consisting of a set-screw, as H, as.
and for the purposes set forth.
Dated 10th 1...