AN IMPROVED APPARATUS FOR SETTING SAW TEETH TO THEIR PROPER ANGLE
Year: 1879

page_text: LETTERS PATENT to Joseph Trickett, of Newark upon Trent, in the County
of Nottingham, Cutler, for the Invention of "AN IMPROVED APPARATUS FOR
SETTING SAW TEETH TO THEIR PROPER ANGLE."
Sealed the 21st November 1879, and dated the 23rd May 1879.
Sealed the 21st November 1879, and dated the 23rd May 1879.
PROVISIONAL SPECIFICATION left by the said Joseph Trickett at the Office
of the Commissioners of Patents on the 23rd May 1879.
JOSEPH TRICKETT, of Newark upon Trent, in the County of Nottingham, Cutler.
"AN IMPROVED APPARATUS FOR SETTING SAW TEETH TO THEIR PROPER ANGLE."
This Invention consists of a metal frame made of malleable steel, iron, or any
other metal, but by preference malleable iron. In the head of the frame of the saw
set is a groove to admit the blade of the saw to be set.
The other part or end of the frame forms the handle, the lever being so arranged
under the handle that the two can be pressed together by the hand. The groove to
admit the saw blade is made close to the end of the frame, and forms a lip, in the
centre of which a groove is sunk to admit a steel bolt, the head of which is suitably
arranged at different bevils or angels to suit the difference in the sizes and pitch of
the saw teeth. The end of the bolt passes through a hole in the lip and is adjusted
by a screw. Opposite the head of the bolt in the lip is a space or groove for the
admittance of the lever and beviled bolt.
The lever or handle is attached to the frame by a bolt or pin passing through the
frame and lever; the bolt runs parallel with the groove which admits the saw blade.
In the lever a steel tooth is attached, and by pressing the lever and handle of the
frame together the tooth in the lever presses the saw teeth on the bevil or angle
head of the bolt which gives it the requisite set.
The lever or handle can also be
used in conjunction with a spring. A gauge is also attached for the setting of
every other tooth of the saw.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Joseph Trickett in the Great Seal Patent Office on the 22nd
November 1879.
"
JOSEPH TRICKETT, of Newark upon Trent, in the County of Nottingham, Cutler.
AN IMPROVED APPARATUS FOR SETTING SAW TEETH TO THEIR PROPER ANGLE."
Figure 1 represents a part longitudinal section of my improved apparatus for
setting the teeth of saws; Figure 2 is a plan, and Figure 3 is a side elevation of
the same respectively; A is a metal frame of malleable steel, iron, or any other
metal, but by preference of malleable iron; a is a slot formed in the head of the
frame to receive the saw B, the teeth of which are to be set; the other end of
the frame fornis a handle b; to the under side of the frame is jointed a lever C by
means of a pin c, and so arranged that the two can be pressed together by the
hand. In the head of the lever c is fixed a steel tooth d, whilst directly opposite
to it is the bevilled edge of the steel bolt head D; the head of this bolt is carried
in a recess formed for it in the front part of the slot "a" in the frame A, and
passing through the front of the frame is securely held in position by the thumb
nut e; Figure 4 is a side elevation, and Figure 5 is a plan of the bolt detached,
and shews the manner in which the edge is bevilled to suit the various angles to
which the teeth of saws require to be set, so that by turning it round in the slot a
and locking it fast by means of the thumb nut e, any required angle is presented
opposite to the tooth d, and upon motion being given to the tooth d by the hand
through the lever C the required set is given to the saw. A guage E can be
attached to the point of the frame A to engage into every other tooth of the saw
to be set, and regulate the position of the frame; Figure 6 shows in elevation
the guage detached, it is provided with a slot ƒ for regulating to the pitch of
the teeth in the saw. A spring g can be inserted between the handle bx, the
lever C to return them to an open position.
Having now described my Invention and in what manner the same is to be
carried into effect, what I claim is, the construction of an apparatus for setting the
teeth of saws, substantially as herein shewn and described.
In witness whereof, I, the said Joseph Trickett, have hereunto set my hand
and seal, this Twenty first day of November, in the year of our Lord
One thousand eight hundred and seventy nine.
JDICTY