for Setting the Teeth of Saws.
Year: 1886

page_text: for Setting the Teeth of Saws.
I ROBERT ELLIOTT, of 164 Rye Hill in the City and County of Newcastle-on-
Tyne, Engineer, do hereby declare the nature of my invention for IMPROVEMENTS
IN OR CONNECTED WITH THE MACHINERY OR APPARATUS FOR SETTING THE
TEETH OF SAWS to be as follows:-
My, invention has for its object to set the teeth of a saw at angles to the blade
by striking the Apparatus down upon the teeth of the saw, this Apparatus consists
of a piece of metal the lower end of which is divided into a number of parts
corresponding in length to the pitch of the teeth and cut away alternatively to
right and left angles or the Apparatus can consist of a disc revolving upon an axle
in a frame, the rim or periphery of this disc is divided into a number of parts or
divisions, the pitch of these parts are equal to the pitch of teeth of the saw, these
parts are cut away alternatively to right and left angles, the disc is driven upon
the teeth by striking the part of the frame immediately above it.
According to my invention the Apparatus consists of a piece of bar steel or other
suitable metal, one end of which serves as a handle by which to hold it the other
is flattened out and divided into a number of parts or divisions corresponding in
length to the pitch of the teeth of the saw these parts or divisions are cut away or
bent alternatively to right and left angles to the front side of the Apparatus, the
saw with its teeth upwards is rigidly fixed by suitable machinery, the Apparatus
here-in before described is held above and and in a line with the blade, the inclined
divisions corresponding to the teeth of the saw, a smart blow is given to the head
of the Apparatus which forces the teeth of the saw to assume the same angles as
the inclined divisions immediately above them.
I may faciliate this operation by making the Apparatus in the form of a metallic.
disc which revolves upon an axle in a frame, the rim or periphery of this disc is
divided into a number of parts or divisions, these divisions are made equal in
length to the pitch of the teeth of the saw and cut away or bent alternatively to
right and left angles to one side of the disc, the frame has a head or anvil formed
immediately above the centre of the disc and a handle is attached by which the
Apparatus is held upon the teeth of the saw, a smart blow is given to the head or
anvil of the frame which forces the teeth of the saw to assume the same angles as
the inclined divisions immediately above them, the disc is worked tooth by tooth
along the entire length of the saw.

page_text: for Setting the Teeth of Saws.
I ROBERT ELLIOTT of 164 Rye Hill in the City and County of Newcastle-on-
Tyne Engineer, do hereby declare the nature of my invention for IMPROVEMENTS
IN OR CONNECTED WITH THE MACHINERY OR APPARATUS FOR SETTING. THE
TEETH OF SAWS and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
My said invention relates to the Machinery or Apparatus for setting the teeth of
saws and has for its principal object to set the teeth alternatively to right and left
angles to the body or blade of the saw by striking the Apparatus down upon the
teeth of the saw.
And in order that my said Invention may be fully understood I shall now
proceed more particularly to describe the same and for that purpose shall refer to
the several figures on the annexed sheet of drawings the same letters of reference
indicating corresponding parts in all the figures.
Figure 1 represents the front, Figure 2 the bottom and Figure 3, the side view
of the Apparatus, arranged for carrying my Invention into effect in setting the
teeth of saws.
The bar-steel or other suitable metal from which the Apparatus is formed has
one end B, flattened out and divided into a number of parts or divisions b, b¹,
corresponding in length to the pitch of the teeth of the saw; these parts or
divisions b, 61, are cut-away or bent alternatively to right and left angles to the
front side of the Apparatus the saw with its teeth upwards is rigidly fixed
by suitable machinery. The apparatus here-in-before described is held above and
in a line with the blade of the saw the inclined divisions b, b¹, corresponding to the
teeth of the saw. A smart blow is given to the head A, of the Apparatus which
forces the inclined divisions b, b', down upon the teeth of the saw, making them
assume the same angles as the inclined divisions b, b¹, immediately above them.
1 may faciliate this operation by making the Apparatus in the form of a metallic
disc which revolves upon an axle in a frame.
Figure 4 represents in section Figure 5 the side and Figure 6 the top view of an
apparatus of this kind. The frame C in which the disc D revolves, is furnished
with a head or anvil C immediately above the centre of the apparatus and
a handle G is attached to an extension of this frame C, the rim or periphery of
the disc D is divided into a number of parts or divisions b, b¹, equal in length to
the pitch of the teeth of the saw, each of these parts b, b', are cut-away or bent
alternatively to right and left angles to one side of the disc D. The saw being
fixed as here-in-before described, the Apparatus is held upon the teeth of the saw
in such a manner that the inclined parts or divisions b, b', correspond to the teeth
of the saw immediately below them, a smart blow is given to the head or anvil C,
which forces the inclined divisions 6 61, down upon the teeth of the saw, making
them assume the same angles as the inclined divisions immediately above them.

page_text: The disc D by means of the frame is worked tooth by tooth along the entire
length of the saw. Blows are given to the anvil when required.
Direct pressure can be given to the anvil to force the disc down upon the teeth
of the saw.
•
Figures 7 and 8 represents in cross section forms of teeth that may be employed.
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. The machinery or Apparatus for setting the teeth of saws consists of
a piece of metal, divided into a number of parts which correspond to the teeth
of the saw and are cut away to required angles that on being driven down upon
the teeth of the saw forces them to assume the same angles as the division or part
immediately above them substantially as here-in-before described.
Second. The apparatus for setting the teeth of saws substantially as here-in-
before described and illustrated in Figures 1, 2, and 3, of the accompanying
drawings.
Third. The apparatus for setting the teeth of saws substantially as here-in-
before described and illustrated in Figures 4, 5 and 6 of the accompanying
drawings:
Dated this 25th day of November 1886.