IMPROVEMENTS IN SAWING MACHINES
Year: 1880

page_text: LETTERS PATENT to Edward Rayner, of Liverpool, in the County of
Lancaster, Timber Merchant, for an Invention of "IMPROVEMENTS IN
SAWING MACHINES."
PROVISIONAL SPECIFICATION left by the said Edward Rayner at the
Office of the Commissioners of Patents on the 16th December 1880.
_EDWARD RAYNER, of Liverpool, in the County of Lancaster, Timber Merchant.
"IMPROVEMENTS IN SAWING MACHINES."
The said Invention relates to sawing machines having reciprocating blades, and
the object is to provide means whereby two or more saw blades shall be so secured
and guided that two or more boards shall be cut from a log with exactness and
precision equal to that which has hitherto only been obtained by the use of single
saw frames with keepers and guides.
For the above purpose I proceed as follows:-First. I make buckles with two or
more grooves or slots therein, one for each saw, and secure the saws in the said
buckles by means of a bolt or pin passing through the said buckle and the saw
blades. The buckles are attached to the reciprocating frame in any usual or
desired manner.
Second. Guides for maintaining the saw blades in one course, or acting in the
same plane, consist essentially of metal bars having grooves or slots therein to
allow freedom to the teeth of the saws, and keepers or holding pieces forming part
of the said metal bars, or consisting of separate pieces inserted between the ends of
the said bars. The said bars are connected and held together by screws passing
therethrough, or by being placed in a pinching or holding box. The guides so
constructed are attached to a stationary bar or frame, and are placed one at each
side of the log to be cut; the saw blades pass one above or below, and the others
between the metal bars. In order to ensure that the exact thickness of board is
cut, and to minimise the effects of wear in the guides, set bolts or their equivalents
are fitted in the metal bars, and by their means the leading edge of the saw is
accurately adjusted.
The saw bench and driving gear are of any usual construction.

page_text: Fig. 1 is a side elevation, and Fig. 2 a perspective view of a sawing machine
constructed in accordance with my Invention, and illustrative of the first and
second parts thereof. a, carrying framework; b, feed and carrying table for logs;
c, reciprocating saw frame; d, connecting rod to engine or motor. The above parts
may be of any ordinary or desired construction. e, log of timber to be sawn;
f, buckles made with grooves or slots; g, g¹, into which the ends of the saw
blades h, h¹, fit; i, i, bolts passing through the buckles and saw blades so as to
secure the whole together. The buckles f are attached to the reciprocating saw
frame c by the angle pieces j; k, metal bars secured to the carrying frame a by
bolting or otherwise; k, metal bar 'secured to the bar k by bolts and nuts l. The
said metal bars k, k', are made with grooves or slots m, m', to allow freedom to the
teeth of the saws; n are keepers between the metal bars k, k¹, to allow of their
being fixed at varying distances apart according to the thickness of the boards to
be cut; o, set bolt which can be made to bear against the saw blade so as to
compensate for any wear in the metal bar k, and for the purpose of accurately
adjusting the saw to make the boards equal in thickness.
Fig. 3 is a sectional view of a modified construction of saw blade guide for four
saws; here there are 4 bars k, k¹, k², k³, separated by keepers n; Fig. 4 is a plan
view of one of the bars k', k, k³; the slots p allow of the said bars being easily
placed in and removed out of position.

page_text: Fig. 5 is a view of a modification of guide where the end of the bars k, k¹, are
held in gripping box; here the end of the bars k, k', are made with lips g projecting
the required distances instead of with adjustable keepers n.
Fig. 6 is a view showing a modification in which a free ended bar kis
used.
Fig. 7 is a view in which a hook piece r is made to serve as the equivalent of
the keepers n.
Fig. 8 is a view in which two of the bars k, k¹, are provided with adjusting set
bolts o, o¹.
Having now described the nature of the said Invention in such manner that
others will be enabled to carry my improvements into effect, I claim,-
First. The improvements in sawing machinery, substantially as herein set-
forth.
Second. Saw buckles constructed substantially in the manner and for the purposes
setforth.
Third. Guides for regulating the position of saw blades constructed and operating
substantially as setforth.
In witness whereof, I, the said Edward Rayner, have hereunto set my hand
and seal, this Fourteenth day of June, in the year of our Lord One
thousand eight hundred and eighty one.
J. JOHNSON,
Patent Office,
Clayton Sqr.,
Liverpool.
Witness.
EDWP. RAYNER. (L.S.)