Improvements in Saw Setting and Sharpening Machines.
Year: 1888

page_text: Improvements in Saw Setting and Sharpening Machines.
1. REGINALD HADDAN of the firm of Herbert & Co. Patent Agents of 18 Buckingham
Street Strand W.C. London in the County of Middlesex Civil Engineer do hereby
declare the nature of this invention a communication to me from abroad by August
Titscher of Schönstein Styria in the Empire of Austria to be as follows:-
This invention relates to the setting and sharpening of saws and consists in certain
improvements in machinery of these purposes.
A file disc is used the extensible shaft of which is journalled in a rocking frame
and revolved by cord and pulleys from the main shaft, the frame being rocked by an
excentric on the main shaft, operating a double cam to depress a lever connected to
the frame so that the latter is rocked twice for each revolution of the main shaft.
The saw is held loosely between two jaws and is fed forward at intervals by a pawl
adjustably secured to a rocking lever so that the distance of travel of the pawl may
be increased or decreased according to the size of the teeth of the saw-The
rocking lever is driven by the rod of an excentric on a shaft driven by bevelled gear
from the main shaft in the ratio of two to one-The setting tool projects over the
clamping jaws and is moved back and forth by an excentric on the main shaft-It is
fork shaped and its two arms abut alternately on each side of the saw so as to bent
the teeth thereof alternately to the right and left.
Dated this 24th day of March 1888.
HERBERT & Co.,
Agents to Applicant.

page_text: Improvements in Saw Setting and Snarpening Machines.
I REGINALD HADDAN of the firm of Herbert & Co., Patent Agents of 18 Buckingham
Street Strand W.C. in the County of Middlesex Civil Engineer do hereby declare the
nature of this invention a communication to me from abroad by August Titscher of
Schönstein, Styria in the Empire of Austria, Manufacturer 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 improvements in saw filing and setting machines for saws
of every kind for instance joiners saws, band saws, circular saws etc.
I am aware that prior to my invention saw filing and setting machines have been
already used but the same are objectionable being too complicated especially in regard
to the adjustment of the working parts according to the different kinds and sizes of
saws and to the hold fasts or screw clamps which hold the saw blade while being
sharpened or filed.
This machine has all working parts adjustable so that the machine within certain
limits may be employed for saws with any pitch and depth of blade and amount of
set, my machine may also be employed for saws with a straight blade as well as for
circular saws and especially the holding device is very simple as this is effected by the
said setting tool.
In the annexed drawings Fig. 1 represents a vertical longitudinal section of the
machine, Fig. 2 is a plan view, Fig. 3 a front view Fig. 4 a cross section on line a a
Fig. 2. Fig. 5 represents a side view of the connecting link with slot for adjusting
and regulating the feed motion. Fig. 6 represents a top view of the vice shaped
guide. Fig. is a modification of the mechanism for raising and lowering the
sharpening or filing disc.
Similar letters refer to similar parts throughout the views. The Figs. 3 to 7 are
detail views of such mechanisms as are peculiar to the invention.
Upon a bed plate a a driving shaft c. is journailed in two bearings 6 said shaft
being rotated by a crank d or by any other suitable gear. From the shaft c are
derived the following motions.
1. The rotary and raising and lowering motion of the filing or grinding disc.
2. The feed motion.
3. The oscillating motion of the setting tool which effects also the clamping or holding
of the saw blade during the operation of filing or sharpening.
I. The rotary raising and lowering motion of the file or sharpening disc.
The file disc e is revolved by the following mechanism. By the spur gear f¹ƒ³ (or
by any other gear) the grooved pulley mounted on the gudgeon g of the tooth
wheel is rotated and transmits its motion to the little grooved pulley h².
The latter is fixed on the shaft i which is partly or entirely (along the whole
length) hollow and which receives a solid shaft ? upon which is mounted the file
dise 2.

page_text: The hollow and solid shafts i and are firmly connected by means of an adjusting
screw so that both shafts and rotate together.
2°
The solid shaft slides in the hollow shaft i so that the distance between the set
iron and the circumference of the file disc e may be adjusted, as otherwise it might
happen that for a certain pitch the edge of the setting tool would face a tooth and
the filo disc might bear against the point or tip of a tooth (instead against a space
between two teeth).
In order to raise the file disc during the feed motion of the saw blade I employ
the following mechanism.
l
Upon the shaft c is mounted an eccentric & which causes an oscillating motion of
the double cam by means of the connecting rod k¹. This double cam turns about
the fixed pivot carried in the forked standard 1. The said double cam has two
eccentric pressing faces 1 and 2 so that during one revolution of the shaft cit
presses twice upon the lever m. This lever m may be turned about the pivot m¹
and is pressed down by the double cam and raised by a spring m².
The vertical extremity of the lever m carries a cross bar m³ which is connected
with a I shaped frame m', the side pieces or shanks of which carry the before-
mentioned shift . This I shaped frame m' turns about the bolt. m³ and can be
fixed in a suitable position by tightening a thumb nut m. This has for its object
to adjust the elevation of the file disc according to the shape of the tooth. A modifi-
cation of the mechanism for raising and lowering the file disc is represented
in Fig. 7.
There the pressing down of the lever m bearing the I shaped frame is effected by
means of an eccentric or cam dise n which is so curved that it presses down the
lever m twice during one revolution of the shaft c. In order to raise the lever m
I employ a spiral spring n'.
2). The feed motion.
The feed motion is derived from or caused by the shafte by means of the bevelled
gear of o² for which however may be substituted any other gear for instance worm
and worm wheel, friction wheels etc., the transmission being into ratio of 2 to 1 so that
the cross shaft of rotates with double the speed of the shaft c.
Upon the shaft o³ is mounted an eccentric of the rod of which engages with its forked
shaped extremity the pins of a sliding piece of which may be raised or lowered in a
guide o by means of a screw o'. The guide piece with slot hole of transfers a rocking
imotion to the shaft derived from the eccentric of.
V
On the end of this shaft is mounted a small lever p' which bears the pawl turning
about the pin and pressed down in the space between two teeth of the saw by means
of the spring p. By this arrangement the shaft p, the pawl p³ receive a rocking or
oscillating motion from the eccentric of which oscillating motion effects the feed
motion of the saw blade to be filed. In order to effect a greater or lesser feed motion
according to the pitch of the saw, the sliding piece of is adjustable in the guide piece
which causes a greater or less motion of the shaft p or the crank of may be connected
adjustably in any known way to the rocking lever o
For the guiding of the saw blade, for saws with straight blades (for instance joiners
saws band saws &c.) I employ a vice shaped mechanism consisting of a stationary
jaw q and of a movable jaw q. Between the same may slide up and down a small
support 3 which carries the guide rollers g, the jaws q' 9 are pressed together by
means of a thumb nut which causes the fixing of the support q³:
For circular saws the saw is put upon the bolt q which passes then through slots of
both jaws q and terminates in a head the feed motion is effected in a similar way
only the pawl must be curved more outwardly.
3. The oscillating motion of the sotting tool. The setting tool which is slotted at
its lower extremity turns about the pin on the jaw ' and moves in a narrow slot in
the jaws 9
Upon the shaft c is mounted an eccentric S which operates a connecting rod S¹
between the fork shaped end of which is placed the setting tool r.
The connecting rod S¹ may be fixed at any suitable beight from the pivot r¹ by an

page_text: djusting set screw. This arrangement may be varied for instance the setting tool
may be provided with holes through which, (and through a hole of the connecting
rod S') is passed a pin or bolt.
By raising or lowering the connecting rod S' on the setting tool a greater or less
setting is effected.
The situation of the eccentrics must be arranged in such a manner that while the
file disc moves down and files, the setting tool is moved forward or backward, the feed
pawl however makes no motion but as soon as the file disc is raised the setting tool
(that is to say the slot of it) must be vertical so that the saw blade can pass through
it at the same time as the motion of the pawl p³ takes place.
It is obvious that the details of construction may be widely varied, thus for the
eccentrics K, S and of may be substituted crank shafts.
I may also employ instead of a file disc an emery disc but in this case the latter
must be rotated by any known gearing with a very great speed.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is.
1. In a saw filing and setting apparatus the rotating file disc or emery disc e
raised or lowered by the spring m² and by the cam substantially as described.
2. In a saw filing and setting apparatus the rotating file disc e or emery
or lowered by the spring and by the eccentric n substantially as
disc raised
described.
3. In a saw filing and setting apparatus the combination of the rotating disc e with
the movable I shaped adjustable frame m turning about the pin m³ in order to raise
or lower the disc e substantially as described.
4. In a saw filing and setting apparatus with a rotating file or emery disc the
arrangement for adjusting the said disc laterally (in the direction of its axis) substantially
as described and for the purpose set forth.
5. In a saw filing and setting apparatus the feed mechanism consisting of the
shaft o (rotating with a double speed with regard to the shaft c which actuates by
means of an eccentric of or by a crank shaft a rocking lever o effecting a rocking or
oscillating motion of the shaft p carrying the lever p¹ with the hinged pawl ps
substantially as described.
6. The mechanism for guiding the saw blade consisting of the jaws q q' with the
sliding support q³ carrying the rollers * which support can be fixed by a thumb nutq
substantially as described.
7. In a saw sharpening and setting apparatus the setting mechanism consisting of
the oscillating lever or setting tool which is adjustably connected to the connecting
rod S the latter receiving a reciprocating motion from an eccentric or crank shaft
substantially as described.
Dated this 22nd day of December 1888