IMPROVEMENTS IN MACHINES FOR SHARPENING AND SETTING SAWS
Year: 1884

page_text: I WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake, and Co Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature
of my invention for "IMPROVEMENTS IN MACHINES FOR SHARPENING AND SETTING
SAWS" to be as follows:-
This invention relates to machines for sharpening and setting carpenters' saws,
band saws, circular saws, hand saws, or the like, and is designed to improve the
construction of the machine described in the specification of former Letters Patent
dated November 25th A D 1882, N° 5617.
To enable the present improvements to be better understood I have represented
a specimen of the improved machine in the accompanying drawing, in which
Figure 1 is a side elevation of the said machine showing a band-saw in position
for being sharpened.
Figure 2 is an end elevation of the same.
Figures 3. 4 and 5 represent the tooth-holder in side elevation, plan, and front
elevation.
Figures 6 and 7 show details of the click or pawl and the regulating mechanism.
Figure 8 is a vertical section of the machine on the line 1-2 Figure 1, showing
the mechanism for setting the saws.
Figure 9 is a plan shewing the means for driving this mechanism.
Figure 10 illustrates a bevel-wheel with notches formed in the nave thereof.
Figure 11 is a detail of the mechanism for setting the saws.
Figure 12 represents a partial end elevation showing the aforesaid mechanism
for setting the saws.
Figure 13 is a side elevation of the said mechanism.
In all these figures the same reference letters or characters indicate corresponding
parts.
I have shown several parts of the machine described in the said former
specification so as to make the present improvements more clearly understood.
a is the support for the endless saw-blade, the height of which can be adjusted
in the pincers or clamps b by the hand-wheel c.

page_text: The driving shaft 8 (Figure 9) of the machine receives its movement from the
pulley 8. On this shaft 8 is keyed a bevel-wheel s¹¹ gearing with another bevel-
wheels which turns the shaft o' on which the disc p (Figures 2 and 3) is fixed.
This disc imparts reciprocating motion to the file by means of its crank-pin n.
On the shaft 8 (Figure 9) a bevel-pinion u¹¹ is loosely mounted and a ring l¹ is
arranged to slide over a key which is fastened to the said shaft. This sliding ring,
Figure 11, is provided with a groove so as to allow the collar 1, which carries a
pin b, to pass over it. This pin projects into the notches 21 or 2 of the bevel-
wheel y by which the shaft of placed on the inside of the frame and underneath
the machine, is made to revolve. On this intermediate shaft o¹¹ are fixed a cam u¹
and a disc z with a pin which pin transmits the requisite movement to the
mechanism for setting the saw.
At the end of the shaft s, and opposite to the driving pulley 8", is mounted a
toothed wheel v¹ gearing with a pinion ". In front of the wheel v¹ there is
fastened on the shafts a disc v provided with a projection or pin causing the
roller w to descend thus forcing the lever u (Figure 1) to push the band saw
forward, which advances one tooth in the direction of the mechanism for setting
the saw.
If the sharpening machine is put in action when the mechanism for setting the
saw is at rest, the main shaft s revolves in the pinion u¹¹, but when the lever x¹¹ is
acted upon so as to make the sliding ring approach the pinion u, the pin all
(Figure 11) revolves around this pinion until it comes to a notch and connects the
sliding-ring with the pinion u¹¹
During this time the pin 611 of the collar leaves the notch z' of the nave of the
toothed wheel y¹¹, and the mechanism for setting the saw is put in motion.
The mechanism of the file-holder represented in Figures 3 to 5, and that of the
clicks or pawls shown in Figures 1, 6 and 7, as well as the automatic device for
putting the sharpening mechanism in and out of gear, represented in Figures 1
and 2, being the same as those described in the said former specification need no
further description.
A saw is set by inclining one tooth to the right and the next to the left, in order
to obtain a cut in the wood which is slightly wider than the thickness of the
Baw-blade.
To attain this result I construct mechanism as shewn in Figures 12 and 13. The
cam u which is mounted on the intermediate shaft o" is provided with pro-
jections u exactly opposite to each other; these projections displace the arm cof
the slide bar d, which carries at the other end a nose or stop el upon which bears
a lifter or cam . The latter acts upon the collar of a sleeve f" in such a
manner that the slide-bar d is freed from the action of the projections u" on
the cam u¹. The slide-bar d" is constantly held in contact with the aforesaid
projections by the pressure of a spring g" which is placed at the round end of the
slide bar 1.
Between the sleeve f" and the spring g is the forked end of the lever h¹l
forming, at ¹, one of a pair of jaws which grip the saw like those of a vice the
moment they are set to work, the lever having the point i for its fulcrum.
The device by which the setting of the saw is to performed is furnished with
deflecting or bending jaws and with rectifying jaws.
The deflecting or bending jaws comprise two clamps J J which may be turned
around a shaft K. On the extremity of the arins L L of the jaws, cylindrical rods
are mounted passing through the ears or lugs M M' cast or soldered on an arm N
of flat iron. Thumb-screws P are made use of to adjust the opening of the clamps
and to bring more or less pressure to bear on the springs Q, so that they bend the
teeth when the tongs J J¹ are caused to oscillate.
The rectifying jaws J J¹ are much larger than the deflecting or bending jaws,
and are arranged in the same manner; they are mounted on the same shaft K and
all four may be raised or lowered by acting upon the hand-wheel R whose axis is

page_text: screw-threaded and passes through the cross-bar S of the bracket T which rests on
the frame a of the machine.
The shaft K is held in the bracket T and the screw-threaded rod R acts on the
top of the bearing K¹. The bracket T is capable of receiving a reciprocating motion
parallel to the saw X by means of a hand wheel Z¹.
The oscillating movement of the jaws is obtained by means of the disc U keyed
on the shaft o" of the machine. The disc U carries a crank-pin V to which the
head of the connecting rod V₁ is coupled. This connecting rod acts upon the levers
or arms N.
The several parts of the rectifying jaws are marked by the same letters, with the
only difference that the first have an index sign added to them.
The rectifying jaws are to correct the work done by the deflecting or bending
jaws by bringing the teeth which have been bent too much to the right or left in a
uniform position with regard to the blade or centre line of the saw X.
On the shaft of one of the cams is a lever acting upon the said cam to free a bar
from the action of the projections on another cam in such a manner that another
blade may be put on the machine, or the one which has been finished removed
therefrom.
HASELTINE, LAKE & Co.,
For the Applicant.

page_text: I, WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake, & Co, Patent Agents,
Southampton Buildings, in the County of Middlesex do hereby declare the nature
of my invention for "IMPROVEMENTS IN MACHINES FOR SHARPENING AND SETTING
SAWS 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 machines for sharpening and setting carpenters' saws,
band-saws, circular saws, hand-saws, or the like, and is designed to improve the
construction of the machine described in the specification of former Letters Patent
dated November 25th A.D. 1882, N° 5617.
To enable the present improvements to be better understood I have represented
a specimen of the improved machine in the accompanying drawing, in which
Figure 1 is a side elevation of the said machine showing a band saw in the
position for being sharpened.
Figure 2 is an end elevation of the same.
Figures 3, 4, and 5 represent the tool-bolder in side elevation, plan and front
elevation.
Figures 6 and 7 shew details of the click or pawl and the regulating mechanism.
Figure 8 is a vertical section of the machine on the line 1-2 Figure 1 showing
the mechanism for setting the saws.
Figure 9 is a plan shewing the means for driving this mechanism.
Figure 10 illustrates a bevel-wheel with notches formed in the nave thereof.
Figure 11 is a view of a detail of the mechanism for setting the saws.
Figure 12 represents a partial end elevation, shewing the aforesaid mechanism
for setting the saws.
Figure 13 is a side elevation of the said mechanism.
I have shown several parts of the machine described in the said former speci-
fication so as to make the present improvements more clearly understood.
a is the support for the endless saw-blade, the height of which can be adjusted
in the pincers or clamps b, by the hand-wheel c.
The driving-shafts (figure 2) of the machine receives its movement from the
pulley 811 On this shaft 8 is keyed a bevel-wheel 8111, Figure 9, gearing with
another bevel-wheel s which turns the shaft o¹ on which the disc p (figures 2
and 3) is fixed. The disc imparts reciprocating motion to the file by means of its
crank pin n.
On the shaft s (figure 9) a bevel-pinion u* is loosely mounted and a ring is
arranged to slide over a key which is fastened to the said shaft. This sliding ring,
figure 11, is provided with a groove so as to allow the collar which carries
a pin to pass over it. This pin projects into one of the notches z¹ z of the
bevel-wheel ¹ by which the shaft oil placed on the inside of the frame and
underneath the machine is made to revolve.
On this intermediate shaft o" are fixed a cam u¹, Figure 12, and a disc with a
pin which pin transmits the requisite movement to the mechanism for setting
';
the saw.

page_text: At the end of the shaft s, and opposite to the driving pulley 8, is mounted a
toothed wheel gearing with a pinion v1. In front of the wheel there is
fastened on the shaft 8 a disc v provided with a projection or pin causing the
roller w to descend thus forcing the lever x (figure 1) to push the band saw forward,
which advances one tooth in the direction of the mechanism for setting the saw.
If the sharpening mechanism is put in action when the mechanism for setting
the saw is at rest, the main shaft 8 revolves in the pinion u*, but when the lever u
is acted upon so as to make the sliding-ring approach the pinion u*, the pin all
(figure 11) revolves in front of this pinion until it comes to a notch and connects
the sliding-ring with the pinion u*.
At the same time the pin 611 of the collar " leaves the notch z¹ of the nave of
the toothed wheel y" and the mechanism for setting the saw is put in motion.
The mechanism of the file-holder represented in figures 3 4 and 5, and that of
the clicks or pawls shown in figures 1, 6 and 7, as well as the automatic device for
putting the sharpening mechanism in and out of gear and represented in figures 1
and 2, being the same as those described in the said former specification need no
further description.
A saw is set by inclining one tooth to the right and the next to the left, in order
to obtain a cut in the wood which is slightly wider than the thickness of the saw-
blade.
To attain this result, I construct mechanism as shewn in figures 12 and 13.
The cam which is mounted on the intermediate shaft ol is provided with
projections ¹¹ exactly opposite to each other. These projections act upon the
arm cll at one end of the slide-bar d, which carries at the other end a nose or
stop el upon which bears a lifter or cam e¹¹¹. The latter acts upon the collar of a
sleeve fin such a manner that the slide-bar is freed from the action of the
projections u¹¹ on the cam u¹. The slide-bar d is constantly held in contact with
the aforesaid projections by the pressure of a spring g" which is placed at the
round end of the slide-bar .
Between the sleeve fll and the spring g is the forked end of the lever h¹l
forming at h¹ one of a pair of jaws which gripe the saw like those of a vice the
moment they operate the lever having the point for its fulcrum.
The device by which the setting of the saw is to be performed is furnished with
deflecting or bending jaws and with rectifying jaws.
The deflecting or bending jaws comprise two clamps J J which may be turned
upon a shaft K.
On the extremities of the arms L L of the jaws, cylindrical rods
are nounted passing through ears or lugs M M cast or soldered on an arm N of flat
iron. Thumb-screws P are made use of to adjust the opening of the clamps and to
bring more or less pressure to bear on the springs Q, so that they bend the teeth
when the clamps JJ are caused to oscillate. In this manner the necessary set is
obtained for the teeth.
The rectifying jaws J¹ J' are much larger than the deflecting or bending jaws
and are arranged in the same manner; they are mounted on the same shaft K and
all four jaws may be raised or lowered by acting upon the hand-wheel R whose
axis R¹ is screw-threaded and passes through the cross-bar S of the bracket T
which rests ou the frame A of the machine.
The shaft K is held in the bracket T and the screw-threaded rod R acis on the
top of the bearing K¹. The bracket T is capable of receiving a reciprocating
motion parallel to the saw X by means of a hand wheel Z
The oscillating movement of the jaws is obtained by means of the disc ³ keyed
on the shaft o of the machine. The disc 23 carries a crank-pin to which the
head of the connecting rod is coupled. This connecting rod acts upon the levers
or arms N N¹
The several parts of the rectifying jaws are marked by the same letters as the
deflecting or bending jaws, the only difference being that the first have an index
sign added to them.

page_text: The rectifying jaws are to correct the work done by the deflecting or bending
jaws, by bringing the teeth which have been bent too much to the right or left in
a uniform position with regard to the blade or centre line of the saw X. *
On the shaft of one of the cams is a lever acting upon the said cam to free a bar
from the action of projections on another cam in such a manner that another blade
may be put on the machine, or the one which has been finished removed therefrom.
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
First. In a machine for sharpening and setting saws as described and illustrated,
the arrangement of the jaw h¹ and of the cam u acting upon the said jaw for dis-
engaging the saw when it is to be moved forward, in combination with the device
(figure 9) for engaging and disengaging the mechanism for setting the saw, as
set forth and represented with reference to figures 9 10, 11, 12 and 13 of the
accompanying drawing.
Second. In a machine for sharpening and setting saws, the arrangement and
combination of the deflecting or bending jaws J for setting the saws, with the
rectifying jaws J¹, for correcting the work of the deflecting or bending jaws, as
described and illustrated with reference to figures 12 and 13 of the accompanying
drawing.
Third. The general arrangement of mechanism above described, and represented
in the accompanying drawing, for sharping and setting carpenters' saws, band-saws,
circular saws, hand-saws or the like as set forth.
.
c T
1007
HASELTINE, LAKE & Co.,
For the Applicant.