IMPROVEMENTS IN SAWS
Year: 1867

page_text: LETTERS PATENT to William Edward Newton, of the Office for Patents,
66, Chancery Lane, in the County of Middlesex, Civil Engineer, for
the Invention of "IMPROVEMENTS IN SAWS."'-'A communication from
abroad by James Ezekiel Emerson, of Trenton, State of New Jersey,
United States of America.
Sealed the 4th February 1868, and dated the 11th September 1867.
PROVISIONAL SPECIFICATION left by the said William Edward. Newton
at the Office of the Commissioners of Patents, with his Petition, on the
11th September 1867.
I, WILLIAM EDWARD NEWTON, of the Office for Patents, 66, Chancery Lane,
in the County of Middlesex, Civil Engineer, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN SAWS," to be as follows:→
This Invention consists in perforating a saw blade with a number of holes
in rear of the teeth for the purpose of admitting of the lengthening of the
teeth when the latter are worn by use without the process of "gumming" or
recutting the throats or spaces between the teeth. These holes and the spaces
between the teeth are cut out by means of dies, consisting of a male and
female die constructed and arranged for the purpose of cutting out the teeth, or
the throats or spaces between the same, and also, the holes in rear of the teeth
at one operation, and admitting of the adjustment of the parts which cut out
said holes in such a manner that the latter may be cut or punched in straight
or curved lines as may be required. The securing of the handle sockets to
the saw blade is effected by means of right angular slots made in the ends of

page_text: the saw blade in combination with screw bolts having a portion of their length
made taper. The bolts are also provided with nuts for screwing them up
tightly.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Edward Newton in the Great Seal Patent Office on
the 11th March 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
EDWARD NEWTON, of the Office for Patents, 66, Chancery Lane, in the County
of Middlesex, Civil Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eleventh day of September, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirty-first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said William Edward Newton, Her special licence that I, the said
William Edward Newton, my executors, administrators, and assigns, or such
others as I, the said William Edward Newton, my executors, administrators,
and assigns, should 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 "IMPROVEMENTS IN SAWS," being a communication to me from
abroad upon the condition (amongst others) that I, the said William Edward
Newton, my executors or administrators, 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 Edward Newton, 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 Drawing hereunto annexed, and to
the letters and figures marked thereon (that is to say):-
This Invention relates, first, to an improvement in the construction of saws
whereby "gumming" is avoided, and a person by means of an ordinary saw
file is capable of keeping the teeth of a suitable length.

page_text: The Invention relates, second, to an improved die or, punch for cutting the
teeth and perforating the saw blade as required.
The Invention relates, third, to an improved mode of attaching handles to,
reciprocating saws, whereby the former, with their sockets may be readily
applied to and detached from the saw, so that in cases of shipment the saw.
blades may be compactly boxed by detaching the sockets, the latter with their
handles being boxed separately..
1
In the accompanying Drawings Figures 1, 2, 3, 4, and. 5. represent side!
views of portions of saws constructed, according to the present Invention;
Fig. 6 is. a perspective view, which, in connection with Fig. 5, shows. the,
manner in which the handle socket is attached to a reciprocating saw;, Fig.,7.
is a side view of the improved dies by which the saw teeth are cut and the
blade punched; Fig. 8 is a face view of one of the same.
A, Figures 1, 2, 3, 4, and 5; represent portions of saw blades which are pro-
vided with teeth a of the usual form, varying of course in size and form,
according to the dimensions of saw and the kind of work to be performed by,
it. In the saw blade are punched holes b, which extend from the roots or
inner ends of the throats c between the teeth inward in a direction with a
line of wear of the teeth,,see more particularly Figures 2 and 4. These holes.
may be of semicircular form, that shape at least would be preferable (cir-
cular holes. 6* are however, shown in Fig. 1), the concave or curved-edges
being innermost. In Fig. 2 the proper direction of the holes 6 is in a, curve
corresponding to the curvature of the outer edges of the teeth, which are of
hook form, and designed for ripping or cutting longitudinally with the grain,
of the wood. In the other illustrations the holes 6 are arranged in straight.
lines. The holes 6 are quite close together, and it will be seen that after, the
teeth are reduced in length by repeated sharpening or filing they may by filing
the throats so as to take out the piece of metal between the roots of the
throats and the outermost holes 6 be lengthened, as the inner or concave sides
of the holes.b will then form the roots of the throats. Thus it will be.seen.
that the throats will be deepened each time a space between the holes 6 is
filed away, and hence the "gumming" of the saw and the consequent delay,
attending the same will be avoided. The holes b. as well, as the, teeth a,, or
rather the spaces or throats c between the same, are cut out by means of
dies B, C, the former, B, being the male, and the latter, C, the female die.
The male, die is composed of a series of semi-cylindrical rods or punches d,
which depend: from rectangular bars e, the former being cut out from the
latter, so that a rod and bar will be all in one piece. A punch f, which is cut
out from a rectangular bar 9, is also a part of die B. The bars 9 and e
17

page_text: are all clamped by means of a screw h in a stock i, having end ledges.j, j, but
none at the sides, and hence it will be seen that the bars e, g, may be moved
or adjusted laterally, so that the rods d may be secured in a straight or curved
line as desired. The female die is composed of a series of bars k having.
semicircular holes & made in them at one side, see Fig. 8, to receive the rods
or punches d, and a hole made in a bar m to receive the punch f. The teeth,
or rather the throats c are cut out by the punch f, and the holes b, are cut out
by the punches or rods d, and in either a straight or curved line, according as
such punches or rods are set, the bars & being adjusted in a stock similar to
the stock of the male die. Hence it will be seen that the holes b and the
throats c are cut at one operation. In reciprocating hand saws, see Fig. 5, I.
make a rectangular slot n in each end of the saw blade, and the sockets D'
which receive the handles are made of a piece of plate metal bent so as to
förm a cylindrical portion o to receive the handle and the lips p, p, between
which 'the end of the saw blade is inserted. The lips p, p, are perforated.
with a square hole q, through which a screw bolt r passes, the portion of this:
bolt adjoining the head being of taper square form,, as shown at s. When the:
end of the saw blade is adjusted between the lips p,'p, the edge of the trans-
verse portion of the slot n nearest the end of the saw blade projects. beyond
the corresponding side of the hole q in the lips p, p, and hence when the:
bolt r is passed through the slot n and through the holes q, q, in the lips p,p;
and the nut t'of the bolt r screwed up, the taper square portions of the bolt-
will draw the rivets u, u, in the lips p, p, firmly against the end of the saw blade;
by this means the sockets will be secured firmly to the ends of the saw
blades, and they may be detached at any time when necessary with the
greatest facility.
Having now described the Invention, which has been communicated to me
as aforesaid, I claim as new, perforating saw blades with a number of holes in
rear of the teeth, as herein set forth, for the purpose of admitting of the
lengthening of the teeth when the latter are worn away by use without
the process of "gumming" or recutting the throats or spaces between the
teeth.
Second. I claim the use of male and female dies constructed and arranged
as shown and described, for the purpose of cutting out the teeth or the throats.
or
spaces between the same, and also the holes in rear of the teeth at one
operation, and admitting of the adjustment of the parts which cut out these
holes, in such a manner that the latter may be cut or punched in straight or
curved lines as may be required.
-
Third: Securing the handle sockets to the saw blade by means of

page_text: rectangular slots n in the ends of the saw blade, and the screw bolts r,
provided with the taper portion 3, as set forth.
In witness whereof, I, the said William Edward Newton, have hereunto
set my hand and seal, the Eleventh day of March, in the year of
our Lord One thousand eight hundred and sixty-eight.
Witness,
J. W. MOFFATT,
66, Chancery Lane.
W. E. NEWTON. (L.S.)