Improvements in Apparatus for Setting Saws.
Year: 1893

page_text: Date of Application, 1st Dec., 1893
Complete Specification Left, 31st Aug., 1894-Accepted, 6th Oct., 1894
PROVISIONAL SPECIFICATION.
[Communicated from abroad by GOTTFRIED FRIEDRICH WILHELM JOSEPH
STEMANN, of 98, Raboisen, Hamburg, Merchant, and MORITZ PHILIPP
CARL FRIEDRICH AUGUST SEEBOLD, of 36, Kommandantenstrasse, Berlin,
Civil Engineer, both in the Empire of Germany.]
Improvements in Apparatus for Setting Saws.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent
Agents, 45 Southampton Buildings, in the County of Middlesex, do hereby
declare the nature of this invention to be as follows:-
:-
This invention relates to apparatus for setting saws.
With the apparatus constructed according to the said invention the setting is
effected by means of a turning slide having adjustable pressing pieces which, in the
to-and-fro movement of the slide, bend the teeth of the saw alternately to the right
and left, the saw being held in a slit of the slide guide; the bending or the turning
movement of the slide is limited by adjustable stops, while the feed of the saw takes
place in the middle position of the turning slide by the aid of a pawl.
In carrying this invention into practice the aforesaid slide for setting the teeth is
furnished with a handle aud guided like a turning slide in a suitable guide plate.
For inserting the saw this guide plate is provided with a slit and the slide with a
suitable recess.
Adjustable jaws designed to effect the bending of the teeth are so
secured to the slide that the front portions of their rearwardly diverging edges will
be as near as practicable to the centre line of the slide. The movement of the
turning slide towards, the sides is limited by the adjustable stops carried by suitable
supports on the guide plate. Between these supports is arranged an oscillating
lever furnished with a downwardly extending nose and carrying a feed pawl. The
slide handle presents a rib-shaped projection which corresponds to the said nose
and in the to-and-fro movement of the handle acts upon the nose so as to impart a
turning movement to the oscillating lever with the feed pawl. The amount of the
turning movement and therefore of the feed may if necessary be regulated by the
aid of a screw adjusting the oscillating lever.
For setting the teeth of the saw the latter is inserted through the aforesaid slit
Eo as to be held by spring supports and counter supports, and when the setting slide
is in the middle position the saw is pushed inwards to such an extent that the teeth
will be between the setting edges. After engaging the feed pawl with the teeth of
the saw the setting slide is turned by moving its handle sideways so that the tooth
between the setting edges will be bent towards the same side. After this operation
the slide is turned back by its handle. When the slide reaches its middle position
the projection on the same takes below the said,nose and by lifting the oscillating
lever actuates the pawl which moves the saw one tooth forwards, so that on the
bandle being turned to the other side the next tooth will be bent outwards to this
other side by the second setting edge, whereupon in the back movement of the
setting slide to the opposite side the same operation is repeated, and so on.
The arrangement of the edges of the setting jaws at an angle opening rearwards
has for its object to obviate the previously set tooth being bent back again in the
backward movement of the setting slide from the terminal position to the middle
position.
D

page_text: I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent
Agents, 45 Southampton Buildings, in the County of Middlesex, 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 improvements in apparatus for setting saws; and the
object of the same is to automatically effect the setting of the teeth in a uniform
and reliable manner.
With the apparatus constructed according to the said invention the setting is
effected by means of a turning slide having adjustable pressing pieces which, in the
to-and-fro movement of the slide, bend the teeth of the saw alternately to the right
and left, the saw being held in a slit of the slide guide, the bending or the turning
movement of the slide is limited by adjustable stops, while the feed of the saw takes
place in the middle position of the turning slide by the aid of a pawl.
In the accompanying drawing,
Figure 1 is a sectional side elevation of the improved apparatus,
Figure 2 is a top view of the same, part of the feed pawl being broken away,
Figure 3 is a top view of the apparatus in a position different from that
illustrated in Figure 2 and with the feeding devices removed for the sake of
greater clearness, and
Figure 4 is a detail, illustrating the means for actuating the feeding device.
Similar letters of reference indicate corresponding parts in the several figures of
the drawing.
The oscillating circular slide a for setting the teeth of the saw S is furnished
with a handle a and guided in a suitable guide plate b. For inserting the saw this
guide plate is provided with a slit and the slide a with a suitable recess.
Adjustable jaws e designed to effect the bending of the teeth are so secured to the
slide a that the front portions of their rearwardly diverging edges c¹ will be as near
as,practicable to the centre line of the slide.
The oscillating movement of the turning slide towards the sides is limited by
adjustable stops d carried by suitable supports d' on the guide plate b. Between
these supports an oscillating lever c is arranged furnished with a downwardly
extending nose e¹ and carrying a feed pawl. The slide handle a' presents a rib-
shaped projection a² which corresponds to the said nose e¹ and in the to-and-fro
movement of the handle acts upon the nose e¹ so as to impart a tilting movement to
the oscillating lever e with the feed pawl f
The amount of the tilting movement and therefore of the feed may if necessary
be regulated by the aid of a screw y controlling the motion of the oscillating lever.
For setting the teeth s of the saw S the latter is inserted through the aforesaid
slit so as to be held by spring supports 62 and counter supports 63, and when the
setting slide is in the middle position the saw is pushed inwards to such an extent
that the teeth will be between the setting edges c¹. After engaging the feed
pawl with the teeth of the saw S the setting slide a is turned by moving its handle
sideways so that the tooth between the setting edges will be bent towards the same
side. After this operation the slide a is turned back by its handle a. When the
slide reaches its middle position (Figure 2) the projection a² on the same takes
below the said nose e and by lifting the vibrating lever e actuates the pawl which
moves the saw one tooth forwards, so that on the handle a' being turned to the
other side (Figure 3) .the next tooth will be bent outwards to this other side by the
second setting edge e', whereupon in the back movement of the setting slide to
the opposite side the same operation is repeated, and so on.

page_text: The arrangement of the edges of the setting jaws c at an angle opening
rearwards has for its object to prevent the previously set tooth being bent back
again in the backward movement of the setting slide from the terminal position to
the middle position.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, as communicated to
me by my foreign correspondents, I declare that what I claim is :-
-
The combination of the guide-plate 6 with the oscillating tool a for setting the
teeth of a saw, and the feed mechanism consisting of the oscillating lever e and
pawl actuated on the movement of the oscillating tool, substantially as and for
the purpose set forth.
D
1
01
1001
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.