IMPROVEMENTS IN THE MODE OF ATTACHING TEETH TO SAWS
Year: 1867

page_text: LETTERS PATENT to William Clark, of 53, Chancery Lane, in the County
of Middlesex, Engineer and Patent Agent, for the Invention of
"IMPROVEMENTS IN THE MODE OF ATTACHING TEETH TO SAWS."-A com-
munication from abroad by Warren P. Miller, of San Francisco, in
the County of San Francisco, State of California, United States of
America,
Sealed the 21st May 1867, and dated the 7th February 1867.
PROVISIONAL SPECIFICATION left by the said William Clark at the
Office of the Commissioners of Patents, with his Petition, on the 7th
February 1867.
I, WILLIAM CLARK, of 53, Chancery Lane, in the County of Middlesex,
Engineer and Patent Agent, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE MODE OF ATTACHING TEETH TO SAWS," to be
as follows:-
Design No. 1 in the Sheet of Drawings annexed represents a segment of a
saw for splitting showing two teeth. Figure 1 represents a tooth set for
work; Figure 2 represents a tooth as being inserted into the seat prepared in
the plate, so much of the groove on the cutting end of the tooth as when in
position projects beyond the cavity in the plate is cut away, allowing it to come
within the V as shown.

page_text: Design No. 2 represents a segment of a saw with the teeth filed for cutting
off, that is to say, cross-cut sawing. Figure 1 represents a tooth worn and
filed away so that it occupies but little more than half of the circle, and is not
capable of being again adjusted. Figures 2 and 3 represent teeth - set in the
proper position for work, each filed from opposite sides. Figure 5 shows a
seat in the plate prepared for a tooth with a V edge. The teeth are pierced
atc
at c for the purpose of inserting a pin by which they may be turned in the
seat.
The object of this Invention is to have a saw tooth of such form that it can
be cheaply and perfectly made, a tooth that can be made in duplicate with
perfect accuracy, and being adjusted without the use of a forge; a tooth that
is strong, self-attaching, has plenty of room for the chip, and will not choke or
clog with the dust. If the point of a tooth is broken off it is only necessary
to start it forward up to the radius line and it will then project the same as
before.
To construct a saw on the plan berein described you will proceed to form
the circular cavities in the plate by means of a suitable cutter forming a V
on the inner edge, and at an angle of 45 degrees. Prepare circular pieces
of steel for the teeth a little larger than is required; when finished pierce
them in the centre, place them on a mandrel and turn them in a lathe and
cut out the V groove, cut away that part of the circle between the heel e and
the point of the tooth f, then pierce them at c, temper the teeth, and they are
ready to insert in the plate.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Clark in the Great Seal Patent Office on the
30th July 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
CLARK, of 53, Chancery Lane, in the County of Middlesex, Engineer and
Patent Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventh day of February, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirtieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said William Clark, Her special licence that I, the said William
Clark, my executors, administrators, and assigns, or such others as I, the
said William Clark, my executors, administrators, and assigns, should

page_text: at any time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for "IMPROVE-
MENTS IN THE MODE OF ATTACHING TEETH TO SAWS," a communication to me
from abroad by Warren P. Miller, of San Francisco, in the County of San
Francisco, State of California, United States of America, upon the condition
(amongst others) that I, the said William Clark, my executors or adminis-
trators, by an instrument in writing under my, or their, or one of their hands
and seals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and cause
the same to be filed in the Great Seal Patent Office within six calendar
months next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Clark, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement, reference being had to the Sheet of Drawings hereunto annexed,
and to the letters and figures marked thereon (that is to say):-
Design Number 1 in the Sheet of Drawings annexed represents a segment
of a saw for splitting showing two teeth. Figure 1 represents a tooth set for
work; Figure 2 represents a tooth as being inserted into the seat prepared
in the plate, so much of the groove on the cutting end of the tooth as when in
position projects beyond the cavity in the plate is cut away, allowing it to come
within the V as shown.
Design Number 2 represents a segment of a saw with the teeth filed for
cutting off, that is to say, cross-cut sawing. Figure 1 represents a tooth worn
and filed away, so that it occupies but little more than half of the circle and
is not capable of being again adjusted; Figures 2 and 3 represent teeth set
in the proper position for work, each filed from opposite sides; Figure 4
shows a seat in the plate prepared for a tooth with a V edge. The teeth are
pierced at c for the purpose of inserting a pin by which they may be turned in
their seat.
The object of this Invention is to have a saw tooth of such form that it can
be cheaply and perfectly made, a tooth that can be made in duplicate with
perfect accuracy, and being adjusted without the use of a forge; a tooth that
is strong, self-attaching, has plenty of room for the chip, and will not choke or
clog with the dust. If the point of the tooth is broken off it is only necessary
to start it forward up to the radius line and it will then project the same as
before.

page_text: To construct a saw on the plan herein described you will proceed to form
the circular cavities in the plate by means of a suitable cutter forming a V on
the inner edge and at an angle of forty-five degrees. Prepare circular pieces
of steel for the teeth a little larger than is required; when finished pierce
them in the centre, place them on a mandril, and turn them in a lathe and cut
out the V groove, cut away that part of the circle between the heel e and the
point of the tooth f, then pierce them at c, temper the teeth, and they are
ready to insert in the plate.
Having described the nature of this Invention, and the manner of performing
the same, I declare that what I claim as the Invention to be protected by the
herein-before in part recited Letters Patent is, an insertable tooth for saws
when said, tooth is constructed upon lines having a true circle and com-
prising more than one hundred and eighty degrees of a circle, and inserted
into a cavity in the saw plate of a shape to fit said tooth, substantially as
.described.
In witness whereof, I, the said William Clark, have hereunto set my
hand and seal, this Sixth day of July, in the year of our Lord One
thousand eight hundred and sixty-seven.
Witness,
A. M. CLARK,
53, Chancery Lane,
London.
W. CLARK. (L.S.)