filing and setting saws
Year: 1895

page_text: A communication from SAMUEL RIMATHE, Merchant, of Casilla de Correo No. 27,
Buenos Ayres, Argentine Republic.
I ALFRED JULIUS BOULT, of 323 High Holborn, in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention to be as
follows:-
My invention relates to machines for filing and setting saws.
The present saw-filing machine, which may also be provided with apparatus
for cross-cut saws, is characterised by the manner in which the advance of the
For instance,
saw-blade is brought about after each completed file-stroke.
whereas the advance of the saw-blade has hitherto been effected by pawls or
catches operated quite independently of the file-carriers, it is effected in this present
improved machine by the file-carrier itself. This is a reciprocating carrier,
moving to and fro and lifted cut of the way of the saw-teeth after each
completed file-stroke, and it is provided with a finger of a sectional form
corresponding to that of the interstitial space between two successive saw-teeth,
and made adjustable in the horizontal plane, which finger, being set askew to.
the saw-blade, on the forward movement of the file-carrier, engages with the
flank of a saw-tooth and, by its wedge-action pushes the saw-blade forward.
On the return-stroke of the file-carrier, simultaneously with the removal of the
file, the finger is lifted from the saw-blade so as to be inoperative.
By this improvement it is evident that a quite important simplification of the
saw-filing or setting machine is introduced, because, together with the special
pawls or catches the entire mechanism for operating the same disappears. At
the same time, however, the working of the machine is itself improved. For
example, in the older machines, it is quite impossible to regulate the stroke of
the pawls or catches with reference to the varying teeth-spacing of different
saw-blades, so exactly that, on a considerable length, there should be no disturbing.
element of difference arise; sometimes, in the old saw-blades the spacing of the
teeth in no way corresponds. On the contrary, however, with the improved,
machine, the oblique finger on the file-carrier of the machine never fails to bring
into the correct position the next tooth to be operated upon.
In the machine-frame rods are arranged to slide in the horizontal plane, and
On one of these.
form, in combination with hollow cross-bars, a solid frame.
cross-bars is secured the connecting-rod whereof the other end encircles the.
crank pin of a disc. The latter is mounted on a driving shaft, to which motion
is communicated by a belt-pulley, a hand-crank or wheel, or other the like.
device. The frames of the file-carriers are carried by the hollow cross-bars,:
and are axially adjustable on them by means of screwed spindles with milled.
heads, and admit of being secured or made fast in any desired position by means
of set-screws. The file-carriers swing on pivot-pins, which are preferably capable
of being moved vertically on the frames and can be adjusted by the pressure-
screws; this last arrangement has for its object to enable the height of the files
to be regulated in relation to, the saw, which however might also be effected.
by means of a vertical adjustment of the saw-blade itself by means hereinafter
to be described.

page_text: With the file carriers, and supported by fork-shaped pieces projecting from the
frames, engage, by means of short link-bars, cams which swing on pivot-pins in the
frame. Springs constantly tend to raise the file carriers out of reach of the saw-
teeth. But with the cams co-operate operating-devices therefor as will hereafter
appear.
In the inner part of the file-carriers, i.e. on the part turned towards the saw-
blade, the files are secured in any suitable manner. The fastening may, e.g. be so
effected that the file (which is tapered at its head-end) may be gripped forward by
a jaw ledge or fillet cut away underneath, on the underside and behind by the
similarly-formed head of a screw, and secured by screwing up the latter. Quite on
the front end of the file-carriers are fixed the fingers, in such manner as to rotate
in a horizontal plane on the screws, which similarly, when screwed home, hold the
Baid fingers fast.
The profile of the easily interchangeable files corresponds to that of the intertooth
spaces of the saw-blade. The profile of the finger is triangular; the obliquely
lying side of the triangle adapts itself to the back of the tooth, but the entire
intertooth-space should not be completely filled thereby. In case of need, however,
the fingers are changed when saw-blades with teeth of various shapes and dimensions
have to be dealt with.
For the saw-blade travelling across the machine two plates which rise vertically
from the bed of the machine serve as guides, during motion and as supports
or backing when the saw is at rest or being operated upon.
In dovetailed grooves
in these plates slide vertically some notched blocks carrying in the notches the
back of the saw-blade. These blocks are carried by rods which rest upon arms
mounted on a common shaft. By a screw both the blocks, and the saw-blade
therewith, may be adjusted vertically.
No special means are necessary for securing the saw-blade in any desired
position, because the file-profile fills the interstitial space between the teeth, and
consequently no tendency to displacement of the saw-blade can arise during working.
At the same time, it will always be advisable to press the saw-blade against the
blocks by suitable springs or equivalent devices. This can be effected by means of
rollers carried by spring-controlled arms.
For the further support of the saw-blade, other suitable means may be applied,
externally to the machine.
If band-saws require to be set, they must be arranged in such manner as to run
upon two discs with vertical axes.
The cross-cutting device or arrangement, to be combined, in case of need, with
this saw-setting machine, must be applied on that side of the machine-frame, on
which the saw-blade quits the machine.
An upright arm is provided with a slot which embraces the saw-blade, as yet
not cross-cut but only filed. Upon a bolt in the head of said arm swings the
Baw-setter, which terminates downwards in an arm. With this latter is engaged
a.slider, which slides to and fro on the bed within certain limits, in the direction
of its length, and carries brackets at its two ends. Upon these latter act springs
with the continual tendency to maintain the slider in a central position. Secured
to a neighbouring bar and carried by a bolt, projecting through a lateral slot
in the frame, are two drivers whereof the one co-operates with the left-hand
bracket which projects slightly forwards. With only one driver it would not
be possible to regulate the degree of cross-cut; but, by means of the slots in
the two drivers, it is possible to slide the same, to the right and left of the bolt,
to a greater or less distance, and thus to cause them to come into co-operation
sooner or later with the respective brackets. This co-operation takes place
immediately before the change of movement (or stroke) of the main reciprocating
frame, and thus, prior to the change of stroke from right to left, the cross-
setter is turned to the left, and vice versa, prior to the change of stroke from
left to right, the cross-setter is turned to the right, whereby the saw-teeth are
turned outwards alternately to left and to right.

page_text: The machine herein before described works in the following manner ;—
The saw-blade is adjusted to the right height by the adjusting screw. Previously,
by means of the spindles and screws, the frames carrying the files have been
adjusted to such a distance from each other and from the cross-setter or wrest, that
each file lies above an interstitial space between two saw-teeth, and a tooth lies
The fingers are then set obliquely
within the range of the cross-setter or wrest.
to the saw-blade, according to the distance between the saw-teeth, so that each
finger, on passing through the interstitial space between the teeth of the saw-blade
may cause the same to be displaced to the distance of a single unit of the division
into teeth.
If the mode of working of a single file is now considered, say the left-hand one,
it will be seen that in the change of stroke of the main reciprocating frame from
right to left, the file-carrier assumes its lowest position, which was brought about
by the cam aforesaid, coming into contact with the stationary cam-operating device
and, over the dead-point, being turned outwards to the right, thereby drawing
down, by means of the link-rods the file-carrier, against the pressure of its spring
until it finally rests on a rest pin. In this position the file-carrier moves forward.
Thereby the point of the finger engages in the interstitial space between two
teeth of the saw-blade, the inclined surface of the finger is applied to the back of
'The
the tooth, and the saw-blade is moved forward by the space of a single tooth.
rear-end of the inclined surface of the finger lies exactly in line with the inclined
surface of the file, so that, on the further advance of the file-carrier, the file enters
When the whole file has
into the space between the teeth and does its work.
brought to rest by the cam coming
passed entirely through the tooth-space, it
against the stationary cam-operating device while the frame travels further; in
this manner the cam is turned back, over the dead-point, the spring comes into
action with the file-carrier which is thereby lifted, so as to bring back the file and
finger into their original position, out of the tooth-space.
Now, however, together with the idle return-stroke of the left file-holder, the
right-hand file-holder begins to work, in the opposite direction viz., forward displace-
ment of the saw-blade, filing of the tooth-space, in exactly the same manner,
followed by an idle return-stroke during the working stroke of the left file-holder.
But inasmuch as during the idle return stroke of the left-hand file-carrier, the
right-hand file-carrier, in its turn, moves the saw-blade forward to the extent of a
single-tooth, one blank tooth-space passes untouched by the former file, and is then
operated on by the latter, it follows that, in this manner the left-hand file cuts the
teeth, alternately, say the odd numbers, 1st, 3rd, 5th etc., while the even numbers
2nd, 4th 6th etc., are cut by the right-hand file, and so on.
The mode of working of the cross-cut device follows on, in accordance therewith.
The invention may obviously be applied to saw-setting machines with a single
file only; and the reciprocating and swinging motions of the file-carrier or carriers
may also be effected by other mechanical ineans than those here described.
Dated this 27th day of September 1895.
ה ……
DOULT & WADE,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Machines for Filing and Setting Saws.
A communication from SAMUEL RIMATHE, Merchant, of Casilla de Correo No. 27,
Buenos Ayres, Argentine Republic.
I, ALFRED JULIUS BOULT, formerly of 323 High Holborn, but now of
111 Hatton Garden, in the County of Middlesex, Chartered Patent Agent, do
hereby declare the nature of this invention and in what manner the same is to be

page_text: performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to machines for filing and setting saws.
The present saw-filing machine, which may also be provided with apparatus for
cross-cut saws, is characterised by the manner in which the advance of the saw-
blade is brought about after each completed file-stroke. For instance, whereas,
the advance of the saw-blade has hitherto been effected by pawls or catches
operated quite independently of the file-carriers, it is effected in this present
improved machine by the file-carrier itself. This is a reciprocating carrier,
moving to and fro and lifted out of the way of the saw-teeth after each completed
file-stroke and it is provided with a finger of a sectional form corresponding to that
of the interstitial space between two successive saw-teeth, and made adjustable in
the horizontal plane, which finger, being set askew to the saw-blade, on the
forward movement of the file-carrier, engages with the flank of a saw-tooth and, by
its wedge-action pushes the saw-blade forward. On the return-stroke of the file-
carrier, simultaneously with the removal of the file, the finger is lifted from the
saw-blade so as to be inoperative.
By this improvement it is evident that a quite important. simplification of the
saw-filing or setting machine is introduced, because, together with the special
pawls or catches the entire mechanism for operating the same disappears. At the
same time, however, the working of the machine is itself improved. For example,
in the older machines, it is quite impossible to regulate the stroke of the pawls or
catches with reference to the varying teeth-spacing of different saw-blades, so exactly
that, on a considerable length, there should be no disturbing element of difference
arise; sometimes, in the old saw-blades the spacing of the teeth in no way corre-
sponds. On the contrary, however, with the improved machine, the oblique finger
on the file-carrier of the machine never fails to bring into the correct position the
next tooth to be operated upon.
In the accompanying drawings, illustrating the new machine ;-
Fig. 1 is a plan, and
Fig. 2 is a vertical longitudinal section, partly in side elevation, of the improved
saw-filing machine;
Fig. 3 shows the profile of the file ;
Fig. 3B that of the finger when engaged between the saw-teeth; and
Fig. 4 shows a side-view of the cross-cutting mechanism, separately.
In the machine-frame A the rods 1 are arranged to slide in the horizontal plane,
and form, in combination with the hollow cross-bars 2, a frame. On one of these
cross-bars is secured the connecting rod 3 whereof the other end encircles the
crank pin 4 of the disc 5. The latter is mounted on a driving shaft 6 to which
notion is communicated by a belt pulley a hand-crank or wheel, or other the like
device. The frames 8 of the file carriers are carried by the hollow cross-bars 2,
and are axially adjustable on them by means of screwed spindles 9 with milled
heads 9 and admit of being secured or made fast in any desired position by means
of set screws 10. The file carriers 11 swing on pivot-pins 12, which can be secured
to the frame 8, or preferably as shown in the drawing are secured to the special
pieces 13 which are capable of being moved vertically on the frame 8 (Fig. 2) and
can be held by the pressure-screws 14; this last arrangement has for its object to
enable the height of the files to be regulated in relation to the saw, which however
might also be effected by means of a vertical adjustment of the saw-blade itself by
means hereinafter to be described.
With the file-carriers and supported by fork-shaped pieces 8* projecting from
the frames 8, engage by means of short link-bars 15, the cams 16 which swing ou
pivot-pins 16 in the frame 8 (Fig. 2). Springs 17 constantly tend to raise the file
With the cams 16 co-operate operating-
carriers out of reach of the saw-teeth.
devices 18 and 19 therefor as will hereafter appear.
On the file-carriers, i.e. on the part presented towards the saw-blade S, the

page_text: les 20 are secured in any suitable manner. The fastening may, e.g. be so effected
hat the file (which is tapered at its head-end) may be gripped forward by a jaw,
edge or fillet 11", on the under side of the file-carriers 11, and behind by the
imilarly-formed head of. a screw 21 and secured by screwing up the latter (see
Fig. 2). Quite on the front end of the file-carriers are fixed the fingers 23, in such
manner as to be able to rotate in a horizontal plane on the screws 22, which
similarly when screwed home, hold the said fingers fast.
The profile of the easily interchangeable files corresponds to that of the spaces
between the teeth of the saw-blade S (Fig. 34). The profile of the finger 23 is
triangular; the obliquely-lying side of the triangle adapts itself to the back of the
tooth, but the entire interspaces between the teeth should not be completely filled
thereby (see Fig. 3B). In case of need, however, the fingers are changed when
saw-blades with teeth of different shapes and dimensions have to be dealt with.
For the saw-blade S travelling across the machine two plates A' which rise
vertically froin the bed of the machine serve as guides for the saw during its
motion and as supports or backing when the saw is at rest or being operated upon.
In dove-tailed grooves in these plates A¹ slide vertically some notched blocks 24,
carrying in the notches the back of the saw-blade (Fig. 2). These blocks 24 are
carried by rods 25 which rest upon arms 26 mounted on a common shaft 27. By a
screw 28 (sce particularly Fig. 2) both the blocks, and the saw-blade therewith,
may be adjusted vertically.
No special means are necessary for securing the saw-blade in any desired
position, because the file-profile fills the interstitial space between a pair of teeth,
and consequently no tendency to displacement of the saw-blade can arise during
working. At the same time, it will always be advisable to press the saw-blade
against the blocks by suitable springe or equivalent devices. This can be effected
by means of rollers 29 carried by spring-controlled arms 30 as shown in the
drawings (Fig. 1 and 2).
For the further support of the saw-blade, other suitable means may be applied,
externally to the machine.
If band-saws require to be set, they must be arranged in such manner as to run
upon two dises with vertical axes.
The tooth-setting device or arrangement, to be combined, in case of need, with
this saw-setting machine must be applied on that side of the machine-frame A, on
which the saw-blade quite the machine.
An upright arm A is provided with a slot a which (Fig. 4) receives the saw-blade,
as yet not set but only sharpened.
Upon a bolt 31 in the head of a standard A' swings the saw-setter 32 which
terminates downwards in an arm 32". With this latter is engaged a slider 33
which slides to and fro on the bed A within certain limits, in the direction of its
length, and carries brackets 34 at its two ends. Upon these latter act springs 35
with the continual tendency to maintain the slider 33 in a central position.
Secured to a neighbouring bar 1 and carried by a bolt 36 projecting through a
lateral slot in the frame A are two drivers 37 whereof the one co-operates with the
left-hand bracket 34, which projects slightly forwards. With only one driver 37
it would not be possible to regulate the degree of "set"; but, by means of slots in
the two drivers, it is possible to slide the sume, to the right and left of the bolt 36,
to a greater or less distance, and thus to cause them to came into co-operation
This action takes place
sooner or later with the respective brackets 34.
immediately before the change of movement (or stroke) of the main reciprocating
frame 1, 2, and thus, prior to the finish of the stroke from right to left, the cross-
setter is turned to the left, and vice versa prior to the finish of the stroke from left
to right, the cross-setter is turned to the right, whereby the saw-teeth are turned
outwards alternately to left and to right.
5 The machine herein before described works in the following manner;-
The saw-blade S is adjusted to the right height by the adjusting screw 28.
Previously, by means of the spindles 9 and screws 10, the frames 8 carrying the

page_text: .
.
files have been adjusted to such a distance from each other and from the cross-
setter or wrest, that each file 20 lies above an interstitial space between two saw-
teeth, and a tooth lies within the range of the cross-setter or wrest. The fingers 23,
are then set obliquely to the saw-blade, according to the distance between the saw-
teeth, so that each finger, on passing through the interstitial space between the
teeth of the saw-blade may cause the same to he displaced to the distance of a
single unit of the division into teeth.
If the mode of working of a single file is now considered, say the left-hand one,
it will be seen from Fig. 2, that in the change of stroke of the main reciprocating
frame 1-2 from right to left, the file-carrier 11 assumes its lowest position, which
is brought about by the cam 16 aforesaid coming into contact with the stationary
cam-operating device 18, and being turned over the dead-point, outward to the
right (Fig. 2) thereby drawing down, by means of the link-rods 15 the file-carrier,
against the pressure of its spring 17 until it finally rests on a rest pin 16.
this position the file-carrier moves forward.
From
Thereby the point of the finger 22 engages in the interstitial space between two
teeth of the saw-blade, the inclined surface of the finger 23 is applied to the back
of the tooth. and the saw-blade is moved forward by the space of a single tooth.
The rear-end of the inclined surface of the finger 23 lies exactly in line with the
inclined surface of the file 20 so that on the further advance of the file-carrier, the
file enters into the space between the teeth and does its work. When the whole file
has passed entirely through the tooth-space, it is brought to rest by the cam 16
coming against the stationary cam-operating device 19 while the frame 8 travels
further in this manner the cam is turned back, over the dead-point, the spring 17
comes into action with the file-carrier which is thereby lifted, so as to bring back
the file 20 and finger 23 into their original position, out of the tooth-space.
Now, however, together with the idle return-stroke of the left file-holder, the
right-hand file-holder begins its work, in the opposite direction, effecting a feed-
displacement of the saw-blade and a filing of the tooth-space, in exactly the same
manner, followed by an idle return-stroke during the working stroke of the left
file-bolder. But inasmuch as, during the idle return stroke of the left-hand file-
carrier, the right-hand file-carrier, in its turn, moves the saw-blade forward to the
extent of a single-tooth, one blank tooth-space passes untouched by the former file,
and is then operated on by the latter, it follows that, in this manner the left-hand
file cuts the teeth, alternately, say the odd numbers, 1st, 3rd, 5th etc., while the
even numbers, 2nd, 4th, 6th etc., are cut by the right-hand file, and so on.
The mode of working of the setting device follows on, in like order.
The invention may obviously be applied to saw-sharpening or setting machines
with a single file only; and the reciprocating and swinging motions of the file,
carrier or carriers may also be effected by other mechanical means than those here
.described.
Having now particularly described and ascertained the nature of the said inven-
tiou, as communicated to me by my foreign correspondent, and in what manner
the same is to be performed, I declare that what I claim is ;-
1
1. Saw-filing or also cross-wresting or setting machines, wherein the forward
movement of the saw-blade is effected by an obliquely adjustable finger (23)
carried by a reciprocating file-carrier or holder (11) which is lifted after the file-
stroke such finger as the file carrier or holder is moved forwards, being caused to
engage with the interstitial space between two adjacent teeth of the saw-blade and
to lay itself against the back of a tooth whereby owing to its wedge-action the saw-
blade is moved forward to the extent of a single tooth and the interstitial space
between the teeth is properly adjusted to he acted upon by the file.
2. In a machine such as is described in Claim 1 the arrangement whereby a
cam-finger (16) with link (15) engages with the file-carrier or holder (11) carried
by the frame (8) such cam at the change of stroke coming at one time into contact
with a bracket (18) so as to be turned round over its dead-point and thus bring the

page_text: file-carrier or holder against the resistance of a spring (17) into the working position
and coming at the other time into contact with a second bracket (19) so as after the
completion of the advance-feed of the saw-blade and the subsequent file-stroke to be.
turned back again so as to raise, with the aid of the spring the file-carrier or holder
out of contact with the teeth.
3. The combination and arrangement of parts constituting a complete machine
for filing and setting saws substantially as and for the purposes described and illus-
trated in the accompanying drawings.
ليم
T
1000
BOULT & WADE,
Agents for the Applicant.