Improvements in Gin-saw Gumming Machines.
Year: 1899

page_text: Date of Application, 7th Mar., 1899 -Accepted, 27th May,
1899
COMPLETE
SPECIFICATION.
Improvements in Gin-saw Gumming Machines.
I, ALBERT ALONZO WOOD, of 201, Jackson Street, in the City of Atlanta and
State of Georgia, United States of America, Mechanical Engineer, 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 relates to devices for sharpening the saws of cotton gins, being
for the purpose of performing the step therein known as "gumming," which con-
sists in removing a portion of the metal at the bottom of the interdental spaces
whereby the teeth are restored to their proper length, angle and shape.
The invention consists of the novel elements and combinations thereof as herein-
after set forth.
The device in one of its forms is shown in the accompanying drawings as
follows:-
Figure 1, is a side elevation of the machine, showing also a saw and space block,
and, in rudimental form, a support for the rear end of the machine.
The machine is shown, in this figure in its normal position when at work. All
the remainder of the figures will be shown on the plane by the file-shaft, when
they will be said to be "in plan," or "in elevation" or will be said to be "vertical."
Figure 2 is a detail, showing the form of the feed-lever pitman.
Figure 3 is a plan of the file and file-shaft and the parts of the frame on which
they are directly carried.
Figure 4 is a plan of the lower portion of the frame, in which the lefthand
portion of Figure 3 is repeated, to slow the connection of the several parts.
Figure 5 is a side elevation of the parts shown in Figure 4.
For convenience, and to conform to the nomenclature usually employed by the
manufacturers of gin sharpening machines, the part that rests on the space blocks
of the gin, (shown in Figure 5), will be called the "stand," and the part carrying
frame." The part that
the file-shaft, (shown in Figure 3,) will be called the
connects the frame with the stand, (shown in the left end of all three figures,)
will be called the hinging-piece."
2
"
Figure 6 is a vertical cross section on the line 6-6, Figure 5.
Figure 7 is a vertical cross section on the line 7-7, Figure 5.
The remaining figures will be on an enlarged scale, the scale being about double
that of those already described.
Figure 8 is a bottom view of a portion of the frame, showing the file, the file-
shaft, the retaining-pawl, the spring that presses the file forward to engage new
teeth and the abutting-piece that supports the saw against lateral movement while
being operated upon.
Figure 9 is a side elevation of the parts shown in Figure 8, with the addition
of a part of a saw.
Figure 10 is an elevation of the left hand end of Figures 8 and 9.
Figure 11 shows the forward end of the retaining-pawl and feed-lever, and the

page_text: sliding journal-bearing box that carries the file-shaft and retaining-pawl, in side
elevation.
Figure 12 shows the same parts as Figure 11, but the opposite side, showing also
the link connection of the feed-lever to the sliding journal bearing box.
Figure 13 is an end view of the sliding journal bearing box showing the eccentric
bushings by which the retaining-pawl and the link of the feed-lever are attached
to the downward projection on said sliding journal bearing box.
Figure 14 is a plan of the parts shown in Figures 11, 12 and 13.
Figure 15 is an end view of one of the eccentric bushings that are shown in
Figure 13.
Figure 16 is a detail showing an adjustable connection that, with the hinging-
piece, connects the frame with the stand. It also shows the spring that gives the
pressure to the file and the connection of the feed-lever to the frame.
Figure 17 is a view of the bevelled side of a feed-bit.
In Figure 1, A is a saw, and B is a space block of a cotton gin. The saws and
space blocks are alternated as is usual in cotton gins, thus forming a saw-cylinder,
and the stand D) in its forward, or bifurcated end, as best shown in Figure 4,
rests on the space block B, the saw passing through the slit, as shown in Figure 1.
The rear end of the stand rests on a support C, which may be a trestle or other
convenient abutment.
The operation to be performed by this machine is the "gumming" out, or
deepening of the teeth of gin-saws, after they become worn, by filing with a rotary
file F which is best shown in Figures 8, 9 and 10. In Figures 8 and 9 it will be
seen that the file is bevelled to fit between the teeth, and is cut, as shown in
Figure 10, on both sides. It should also be cut on the edge, as is usual with knife-
edge files. The rotary file is carried on a shaft G which is driven through the
gears g and h, by the hand-crank shaft H. The shafts and gears, just described,
are carried on the frame I as shown in Figure 3, the shaft H passing through the
trunions i, and the shaft G through the sliding journal-bearing box J and being
reciprocable through the gear g, by which it is driven by means of a feather or
spline in the groove gl. The hub, or boss, of the gear g forms a journal-bearing
in the frame and is held in position in the frame by the set-collar g². A similar
set-collar on the shaft G together with the collar gå prevents the racing of the
shaft in the sliding journal-bearing box J and causes it to be carried longitudinally
with said bearing-box.
To one side of the downward projection is journalled the retaining-pawl K,
Figures 8, 9, 11, 12 and 14.
This journal is formed by the eccentric bushing K' which is rotatable on the
screw K. On the forward end of the retaining-pawl is a bit & that engages the
saw-teeth as shown in Figure 9. This bit should be made of steel and be tempered,
one side being flat and the other being bevelled on the top and bottom edges as
shown. In length it should be sufficient to reach across the part marked K and
project sufficiently to reach across, and beyond the saw A, as shown in Figures 8
and 17. This bit k is attached by means of the dove-tailed recess formed by the
bevelled shoulders k, in the part K, and 2 in the strap K". The strap K is also
grooved forming a shoulder that abuts against the shoulder, as shown in
Figures 9 and 11, and is held by the screw passing through the strap into the
pawl K. This retaining-pawl has two principal functions. First, to locate the
file over the interdental space to be gummed, and second, when the gumming is
finished to guide the file in its upward movement so that it will not touch and
roughen the sides of the teeth (i.e. the surfaces just filed) nor contact with and
blunt the sharpened teeth. The first function is properly performed as follows:
The file-shaft, has, as before specified, endwise motion, and the retaining-pawl K
is fulcrummed on the arm 1 movable with said shaft. Hence, it is obvious that
when the bit k permits the shaft to move forward and stops such forward move-
ment by dropping into the interdental space next in succession relative to it. Also
inasmuch as the said bit k moves in a plane (practically a plane) parallel to the

page_text: plane of the file, the distance between these planes will not vary no matter how
deep the interdental space, in which said bit k rests, is relatively to the inter-
dental space in which the file then rests. If the distance between these planes
does not vary a tooth or more may be brought to a good point without changing
the interdental intervals, that is the pitch of the teeth. If this result did not take
place in a gummer, the teeth would be so gummed as to be of different lengths and
different pitch and the circularity of the saw would be destroyed, but in my device
the saw is kept in a true circle, the teeth kept of the same pitch and a broken tooth
can by successive gummings be brought up to the general periphery. The
necessity for a device of this kind in a gummer will be best appreciated when the
fact is considered that the feeding of any machine is necessarily slightly irregular,
especially in gin-saws, which have been hand-gummed or hand-filed. The second
function i.e., that of preserving the finished surfaces and paint from injury by
the file is due to the fact, that the file, in lifting from a finished interdental space,
lifts slightly before the finger Y contacts with the retaining-pawl and starts it
lifting, thereby freeing the file from contact with the saw, the bit k following, as
it is lifted, the long side of the footh, and causing the file to move out of its inter-
dental space parallel to and a short distance from the long side of the tooth, and
when the said bit & will pass over the point of a tooth the edge of the rotating
file is obviously off the point of the tooth over which it is to pass.
l
The arm L, formed of bent wire and pivoted in the lug on the frame, passes
through a hole in the upward projection K³ on the retaining-pawl as shown in
Figure 9.
On this arm is a spring L' acting as a pressure-spring between the loose washer (1
on the upward projection, and the nut 2 which is screwed onto the arm and acts
as a pressure adjustment. A return bend is formed in the arm L to permit of a
long spring in order to provide for a practically uniform pressure without refer-
ence to the position of the sliding journal-bearing box and its connected elements.
The feed-lever M is fulcrumed on a link, preferably a pendulous arm, N, and has
on its forward end, a bit m, Figures 1 and 12 in form and means of attachment
similar to the bit described as being on the retaining-pawl, and engages the saw-
teeth to turn the saw, as will be described. On the rear end of the feed-lever is
an eccentric bushing m¹ that is attached by, and is rotatable on, the screw m². The
feed-lever is operated through a pitman Q, the upper end of which is journalled
on the eccentric o on the gear hand the lower end has an L-shaped slot that is
best shown in Figure 2. The connection between the eccentric and the feed-lever
is by the shoulder m³ Figure 2, resting against the eccentric bushing m¹, which
position is assured by the pulling spring p, one end of which is attached to the
pitman Q and the other to a stud p¹ in the vertically adjustable collar P, as shown
in Figure 16. It is not essential that this spring be attached to this collar, but
only that it have some practically fixed attachment.
The link Q, Figures 1 and 12, connects the feed-lever M to the downward pro-
jection on the sliding journal-bearing box J, being attached to the lever by a
shoulder-screw g, Figure 11, and to the downward projection by an eccentric
bushing g and the screw g. While the feed-lever M, by its hit m, engages the
teeth of the saw, the slot g³ in the link Q¹ will limit the forward movement of the
sliding journal-bearing box and consequently the retaining pawl and file, as will
be hereinafter explained.
By reference to Figures 1 and 5 it will be seen that the frame 1 is hinged to
the hinging-piece R by the trunions i, one of which enters a laterally projecting
arm. This hinging-piece is attached to the stand by a cap-screw shown in
Figures 4, 5 and 7. holding the annular disk on the stand, as shown in section,
in Figure 7. The hinging-piece revolves on the joint last described for the pur-
pose of adjusting the position of the frame, forward or backward, as might be re-
quired and as will be described.
The frame I being hinged at its rear end, as described, the position of its free,
or forward end is governed by the rod s extending from it to the partially rota-

page_text: table stud U in the frame, as shown in Figures 1 and 16. On the frame are two
downwardly projecting lugs n and n¹, Figures 8 and 16, and between those lugs
goes the pendulous arm. N, on which the feed-lever is fulcrummed. The screw n³
is screwed into the link or pendulous arm, and forms journals in the lugs n and
n', passes through the rod S with a shoulder at its outer side, and has a groove in
its head for the pulling spring T. The screw n³ passes through a slots in the upper
end of the rod S, as shown in Figure 16 the upper end of the slots limiting the
lift of the frame, and with it the file, as the file passes from one tooth to another,
while the bottom end of the slot is a clearance, the downward abutment being the
saw contacted with by the file at the free end of the frame, instead of the lower
end of the slot. The pulling-spring T is attached at its lower end to a screw or
studs on the collar P that is vertically adjustable on the rods, and operates to
depress the frame and press the file against the saw.
The frame being hinged as described, is adjusted as to height by swinging on
said hinge and being fastened in the desired position by clamping the rod 's in its
hole in the stud U by the screw u.
On the forward, or free, end of the frame is a downwardly projecting abutment-
arm W that supports the saw against lateral deflection while being operated upon
by the file. The file runs in the direction indicated by the arrow in Figure 10.
By reference to Figures 4 and 5, in connection with Figure 1, it will be observed
that the stand D consists of the parts d¹ and da, and that they are screwed together,
with spacing washers to form an opening through which the saw passes. It is
found by experience that when saws are in bad condition, requiring sharpening,
they generally carry some gum and lint, which, on the saws being rotated for the
purpose of presenting the different teeth to be operated upon, will be scraped off
by the inwardly projecting flanges f and f¹, which necessarily contact with the
saw for the purpose of maintaining the machine in its proper position. These
flanges, therefore, slope downwardly as shown in Figure 5, in the direction in
which the saws are turned while being operated upon, and tend to scrape off the
gum and lint and by reason of the divergence of the flanges 2 and 3 of the lint
and gum will be carried away from the saws and discharged off the stand.
The machine is adjusted and operated as follows:-
The bifurcated portion of the stand is placed over the saw and rests on the space-
blocks, as shown in Figure 1, the rear end resting on any suitable support. Notice
should then be taken as to whether the file stands at the correct angle to the saw;
that is to say, whether it will file teeth of the correct shape or angle. If a change
of angle is necessary, the cap-screw r and the screw u should be loosened which will
permit the frame to be moved forward or back and also allow its vertical adjust-
ment. It will then be easy to locate the file at such place, on the periphery of the
saw, as will give the required angle to the teeth, which being done, both of said
screws should be tightened. Next, if necessary, the retaining-pawl K should be
adjusted by turning the eccentric bushing K₁ until the bit k exactly engages a
tooth near the file, preferably the next to it, when the bushing should be tightened
by the screw K2. The periphery of the saws sometimes becomes radially irregular,
from wearing and sharpening: the file therefore is permitted lateral movement by
the mechanism consisting of the sliding journal-bearing box J and its connection
with the file-shaft G. The retaining-pawl, by reason of its connection with the
sliding hearing box J will always maintain an uniform distance from the file, and
its function is to engage a tooth that has been gummed by the file and cause the
file to work in the proper place. Sometimes a broken tooth would otherwise cause
the file to be deflected from its proper position. As the forward end of the frame
and file is lifted, as will be hereinafter described, the bearer Y, that extends under
the retaining-pawl K, as shown in Figures 8 and 9, lifts the retaining-pawl when
the frame is lifted, which permits the file and pawl each to pass over one tooth
and engage the next. Whenever the retaining-pawl is lifted by the bearer it will
contact with the bearer at the rear end of the strap K. It will be observed that
the drawing back of the retaining-pawl K, to suit saws of the coarser pitch, by

page_text: turning its eccentric bushing K¹, will lift the rear end of said pawl and permit
the bit k to drop lower relatively to the file, as would be made necessary by its
greater distance from the file. There is, normally, a slight space between the
bearer Y and its point of contact with the strap K of the retaining-pawl K to en-
sure the seating of the bit k, notwithstanding slight irregularities in the teeth,
but not sufficient to provide for teeth of much coarser pitch. The sliding journal-
bearing box J, with its connected parts, is carried forward by the spring L¹ until
stopped by the slot in the link Q¹, as will be hereinafter described; this spring
also acting to cause the proper seating of the bit k. It will be observed by refer-
ence to Figure 9 that the pivotal point of the pawl K is so placed as to cause the
vibratory movement of the feed bit k to be substantially in a plane at a right
angles to the axis of the file or parallel to the plane of said file.
This movement, to be exact is along a short curve the chord of which is sub-
stantially parallel to the plane of the file. The result of this is, that, where one
tooth is cut deeper than others, it will not effect the position of the retaining-pawl
relative to the file and so will not alter in the slightest degree the pitch of the
teeth or cause the file to work more than is proper upon either the front or back
sides of any tooth.
The feeding mechanism is shown in Figure 1, details only being shown in other
figures. The feed-lever M, being pivoted to the link or pendulous arm N, is actu-
ated by the eccentric o through the pitman Q. The spring » acts to keep the
shoulder m³, on the pitman, in engagement as long as it is desired to feed a tooth
as often as the hand-crank Z makes a revolution. Whenever it is desired to allow
the file to dwell longer than one revolution of the handcrank, the pitman Qis
pulled back, causing a disengagement of the pitman and the lever, by the projec-
tion 2, and held as long as it is desired to have the file work on one place. When-
ever the pitman Q is released the spring ? will cause a re-engagement and will
also cause the feed-lever M to spring forward whenever its hit is disengaged. The
eccentric, on the gear h, has a greater throw than is necessary to
produce the movement of the lever necessary to feed from one tooth
which excess of movement is provided for, or lost, by having the opening
that engages the feed-lever, larger in the line of its movement, than the eccentric
bushing m on the feed-lever M. The excess of throw in the eccentric is for the
purpose of giving the lever a sufficient movement to feed the saw one tooth with
only a part of half of a revolution. The lever being attached to the link or pen-
dulous arm N¹ is free to move back and forth, as is necessary to retain the bit k in
contact with the saw.
The feed-lever M in Figure 1, is shown in engagement, by its bit, with the
saw, and in a tooth next the retaining pawl. While in such engagement the
saw is fed down one tooth by the continued movement of the eccentric o; the
first effect however, is to lift the frame I, by reason of the pendulous arm being
connected thereto, until its upward movement is stopped by the screw n³ contacting
with the upper end of the slot s, as shown in Figure 16. Of course this upward
movement of the frame lifts the file and the retaining pawl out of contact with
the saw and permits the continued movement of the feed-lever to turn the saw
downward the required distance. After the feed-pawl shall have moved in the
direction just described, and before it returns, the continued movement of tho
eccentric will permit the frame to descend until the file and the retaining pawl
engage their respective teeth, after which it will return and engage the tooth
next the retaining pawl. Whenever the file and the retaining pawl shall be
lifted out of the teeth, as just described, they will be free to be moved forward
by action of the spring L' as has been described, their forward movement being
limited by the contacting of the eccentric bushing q', that is attached by a
screw to the downward projection on the sliding bearing J, with the slot in the
link as shown in Figures 1, 12, and 14, consequently the eccentric bushing q¹
should be so adjusted, by turning, as to permit the file and the retaining pawl
to move forward only so far as will cause them to enter the desired teeth on

page_text: descending. It will be seen that the feed-pawl will accomodate itself to varia-
tions in the radius of the saw, by reason of being attached to the link or pen-
dulous arm N and that the file and retaining pawl will follow it, or be kept in
the proper relative position to it within the limit of movement of the sliding
journal bearing box. As has been said, the eccentric o first lifts the frame and
then feeds forward the saw. The eccentric bushing m¹ should be so adjusted,
by turning, as to cause the movement of the feed-lever M to cease as soon as the
saw shall have been fed a sufficient distance to allow the file and the remaining
pawl to pass over the teeth. Any greater lift would keep the file away from its
work a longer time than necessary.
The pressure of the file on the saw is governed by the pulling-spring T, and
is regulated by moving the position of the collar P, to which the spring is
attached, up or down on the rod S.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1st. In a gin-saw gummer, a stand bifurcated and adapted to contact with
the periphery of the space-blocks and slitted to receive the saw, and flanges pro-
jecting from each side of said slit and adapted to contact with the sides of the
saw, for the purpose specified.
2nd. In a gin-saw gummer, a stand bifurcated and adapted to contact with
the periphery of the space-blocks and slitted to receive the saw, and flanges pro-
jecting from each side of said slit, and flanges being inclined downwardly as
they extend from the center of the saw, and adapted to contact with the sides of
the saw, for the purpose specified.
3rd. In a gin-saw gummer, as a means for supporting the frame adjustably
on the stand, the combination of said stand adapted to engage the space-block,
a disk on the side of its upper part, a hinging-piece pivotally secured to said
disk, and having an arm projecting laterally therefrom, and the frame fulcrumally
mounted between said hinging-piece and the end of its arm, substantially as
specified.
4th. In a gin-saw gummer, the combination of a stand adapted to engage the
saw-cylinder, a hinging-piece having a laterally projecting arm and being pivot-
ally secured in substantially an upright position to said stand, holes bored
through said hinging-piece and the end of its arm concentrically, a frame semi-
rotatably attached thereto having arms on its back end, a trunion on each of said
arms projecting concentrically in the same direction and adapted to enter and
be semi-rotatably secured therein, all for the purpose specified.
5th. In a gin-saw gummer, a stand, a vertically movable frame thereon, a
file shaft mounted rotatably in said frame so as to have longitudinal motion therein
and adapted to hold a circular file on its end, and means for limiting the forward
movement of said file shaft in locating the file in an interdental space consisting
of a vertically movable retaining pawl adapted to successively contact with the
saw teeth and mounted in operative relation to said shaft so as to follow its
axial movement and be vertically vibratory along a curve, the chord of which
is substantially parallel to the plane of said file and means for rotating to saw
cylinder to present the saw teeth successively to the file.
6th. In a gin-saw gummer, a stand, a vertically movable frame thereon, a
file shaft mounted rotatably in said frame so as to have longitudinal motion therein
and adapted to hold a circular file on its end, and means for limiting the forward
movement of said file shaft in locating the file in an interdental space consisting
of a vertically movable retaining pawl adapted to successively contact with the
saw teeth and mounted in operative relation to said shaft so as to follow its
axial movement and be vertically vibratory along a curve, the chord of which
is substantially parallel to the plane of said file, and means for pressing said

page_text: file and retaining pawl forwardly, and the latter downwardly and means for
rotating the saw cylinder to present the saw teeth successively to the file.
7th. In a gin-saw gummer, a stand, a vertically movable frame thereon, a
file-shaft mounted rotatably in said frame, so as to have longitudinal motion therein
and adapted to hold a circular file on its end, a vertically movable pawl adapted
to successively engage the saw-teeth and mounted in operative relation to said
shaft so as to reciprocate with it, and be vertically vibratory along a curve the
chord of which is practically parallel to the plane of the said file along a curve
the chord of which is practically parallel to the plane of the said file, and means
for pressing said file and pawl forwardly and the latter downwardly, and means
for rotating the saw cylinder.
8th. In a gin-saw gummer, a stand adapted to hold the machine in operative
relation to the saws, a frame hinged thereon so as to be vertically movable, a
circular file rotatably mounted near the free end of said frame so as to have
motion axially, a pendant arm secured to said file-mounting and adapted to
follow it in the axial movement of the file, a pawl fulcrumed on said pendant
arm and adapted to, engage a tooth of the saw and a spring acting to force said
file-mounting forwardly and feed mechanism adapted to rotate the saw for the
purpose specified.
9th. In a gin-saw gummer, a stand adapted to hold the machine in operative
relation to the saws, a frame hinged thereon so as to be vertically movable, a
circular file rotatably mounted near the free end of said frame so as to have
motion axially, a pendant arm secured to said file-mounting and adapted to
follow it in the axial movement of the file, a pawl fulcrumed on said pendant
arm and adapted to engage a tooth of the saw next below the one to be gummed,
and a spring acting to force said file-mounting forwardly and feed mechanism
adapted to rotate the saw, for the purpose specified.
10th. In a gin-saw gummer, a stand adapted to hold the machine in operative
relation to the saws, a frame hinged thereon so as to be vertically movable, a
circular file rotatably mounted near the free end of said frame so as to have
motion axially, a pendant arm secured to said file-mounting and adapted to
follow it in the axial movement of the file, an eccentric sleeve rotatably mounted
on said pendant arm and a pawl fulcrumed on said eccentric sleeve and adapted
to engage a tooth of the saw and a spring acting to force said file-mounting
for the purpose
forwardly and feed-mechanism adapted to rotate the saw
specified.
11th. In a gin-saw gummer, a stand adapted to hold the machine in operative
relation to the saws, a frame hinged thereon so as to be vertically movable, a
circular file rotatably mounted near the free end of said frame so as to have
motion axially, a pendant arm secured to said file-mounting and adapted to
follow it in the axial movement of the file, a pawl fulcrumed on said pendant
arm and adapted to engage a tooth of the saw, and upright K³3 on said pawl and
a spring L bearing on said upright and acting to force said file-mounting
forwardly and at the same time forcing said pawl downwardly into engagement
and feed mechanism adapted to rotate the saw, for the purpose specified.
12th. In a gin-saw gummer, a stand adapted to hold the machine in operative
relation to the saws, a frame hinged thereon so as to be vertically movable, a
circular file rotatably mounted near the free end of said frame so as to have
motion axially, a pendant arm secured to said file-mounting and adapted to
follow it in the axial movement of the file, a pawl fulcrumed on said pendant
arm and adapted to engage a tooth of the saw, an upright on said pawl, a wire
secured to the frame and passing through said upright and a spring mounted on
said wire with one end bearing against said upright and the other against an
adjusting nut on said wire and acting to force said file-mounting forwardly and
feed mechanism adapted to rotate the saw for the purpose specified.
13th. In a gin-saw gummer, a stand adapted to hold the machine in operative
relation to the saws, a frame hinged thereon so as to be vertically movable, a

page_text: circular file rotatably mounted near the free end of said frame, so as to have motion
axially, a pendant arm secured to said file-mounting and adapted to follow it in
the axial movement of the file, a pawl fulcrumed on said pendant arm and adapted
to engage a tooth of the saw, a spring acting to force said file-mounting forwardly,
feed mechanism adapted to rotate the saw, an eccentric bushing on said pendant
arm and a slotted piece in operative relation to the feed mechanism so as to move
synchronously therewith with its slot encircling said eccentric bushing, for the
purpose specified.
14th. In a gin-saw gummer, a stand adapted to hold the machine in operative
relation to the saws, a frame hinged thereon so as to be vertically movable, a
circular file rotatably mounted near the free end of said frame so as to have
motion axially, a pendant arm secured to said file-mounting and adapted to follow
it in the axial movement of the file, a pawl fulcrumed on said pendant arm and
adapted to engage a tooth of the saw, a spring acting to force said file-mounting
forwardly, and inclined abutment under said pawl adapted to lift same upon its
retraction and feed mechanism adapted to rotate the saw, for the purpose specified.
15th. In a gin-saw gummer, a stand adapted to hold the machine in operative
relation to the saw-cylinder, a frame hinged thereon, a circular file mounted rotat-
ably on said frame at its free end, means for rotating the saw-cylinder and of
raising and lowering said frame and means for adjusting its angle to the base con-
sisting of a rod connected by a moving joint to said frame and a lug on the base
adapted to receive said rod and means for tightening said rod therein, for the pur-
pose specified.
16th. In a gin-saw gummer, a stand adapted to hold the machine in operative
relation to the saw-cylinder, a frame hinged thereon, a circular file mounted rotat-
ably on said frame at its free end, means for rotating the saw-cylinder and of
raising and lowering said frame, means for adjusting its angle to the stand con-
sisting of a rod slotted at its upper end, a stud on said frame passing through said
slot and a lug on the base adapted to receive said rod and means for tightening
said rod therein, for the purpose specified.
th. In a gin-saw gummer, a stand adapted to hold the machine in operative
relation to the saw-cylinder, a frame hinged thereon, a circular file mounted rotat-
ably on said frame at the free end, means for rotating the saw-cyclinder and of
raising and lowering said frame, means for adjusting its angle to the stand con-
sisting of a rod slotted at its upper end, a stud on said frame passing through said
slot, a lug on the base adapted to receive said rod and means for tightening said
rod therein, a pin adjustable longitudinally of said rod and a pulling spring secured
to said pin at one end and to said stud at its other end, for the purpose specified.
18th. In a gin-saw gummer, a stand adapted to sustain the machine in operative
relation to the saw cylinder, gumming tool adjustably mounted on said stand, a
main shaft and means for operatively connecting said tool and shaft, a feed-lever
fulcrumed on said stand and adapted to engage the teeth of the saw successively,
a pin on the back end of said lever, an eccentric on said main shaft, a pitman
connected to said eccentric and having a slot in its lower end in the form of an
inverted and thereby engaging said pin, for the purpose specified.
19th. In a gin-saw gummer, a stand, a frame hinged thereto so as to be vibrat-
able vertically and means for limiting the upward movement thereof, a gumming
tool operatively mounted on the free end of said frame and adapted to move into
and out of the saw, teeth on the vibration of said frame, a link pendant from-said
frame, a feed-lever fulcrumed on said pendant link, means thereon for engaging
the saw-teeth successively and means for oscillating said feed-lever, for the purpose
specified.
20th. In a gin-saw gummer, a stand, a frame hinged thereto so as to be vibrat-
able vertically and means for limiting the upward movements thereof, a gumming
tool operatively mounted on the free end of said frame by means of a sliding bear-
ing and adapted to move into and out of the saw-teeth on the vibration of said
frames a feed-lever fulcrumed on said pendant link, means thereon for engaging

page_text: the saw-teeth successively and means for oscillating said feed-lever, an arm on
said feed-lever, a slotted link carried on said arm and a pin on said sliding bear-
ing to which said link engages by its slot, for the purpose specified.
21st. In a gin-saw gummer, a stand, a frame hinged thereon so as to be vibrat-
able vertically and means for limiting the upward movement thereof, a gumming
tool operatively mounted on the free end of said frame by means of the sliding
bearing and adapted to move into and out of the saw-teeth on the vibration of
said frame, a link pendant from said frame, a feed-lever fulcrumed on said pen-
dant link, means thereon for engaging the saw-teeth successively and means for
oscillating said feed-lever, an arm on said feed-lever, a slotted link carried on said
arm, and a pin on said sliding-bearing with which said link engages by its slot
and an eccentric sleeve on said pin substantially the same diameter as the width
of said slot, for the purpose specified.
Dated this 7th day of March 1899
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.