IMPROVEMENTS IN MACHINERY OR APPARATUS FOR SAWING WOOD."
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by Thomas Nield Robinson at the Office
of the Commissioners of Patents on the 26th January 1882.
THOMAS NIELD ROBINSON of Rochdale in the County of Lancaster Engineer.
IMPROVEMENTS IN MACHINERY OR APPARATUS FOR SAWING WOOD."
My improvements relate to that class of circular saw bench which is provided at
each end with rollers by which the wood to be operated upon is fed to the saw or
again returned after being cut, into position for being further operated upon such
rollors aforesaid have hitherto been actuated by manual labor or by motive power
in one direction only, and my Invention consists in arrangements enabling them
to be actuated by the motive power by which the saw is driven so that the before
named rollers may be rotated in one direction or the other as desired and I causo
such rollers to be rotated at one speed when feeding the wood while being sawn
and to revolve at a greater speed when returning the wood to be again operated
upon.
For this purpose I mount toothed wheels upon the axles of the before named
rollers gearing into pinions mounted upon supplementary shafts mounted so as to
be capable of revolving in brackets or bearings carried by the saw bench.
Upon the saw shaft or spindle I mount two pulleys one of which I use for
transmitting rotatory motion to the roller aforesaid when feeding the wood to the
saw the other being used for traversing the wood in an opposite direction. The
pulley aforesaid for feeding the wood to the saw transmits motion by means of an
endless strap or belt to a pulley mounted on a bush revolving freely upon one of
the supplementary shafts before named.-Upon the bush above referred to is
mounted a pulley which by means of an endless belt or strap transmits rotatory
motion to fast and loose pullies mounted upon the other supplementary shaft
previously named. The pulley above referred to as mounted upon the saw shaft
or spindle for traversing the wood in a direction opposite to that for feeding I
provide with an endless strap or belt which imparts rotatory motion to a pulley
fast upon a counter shaft carried by and capable of being freely rotated in brackets
carried by the saw bench. Upon the said countershaft I also mount a pulley
which by means of an endless belt is also capable of transmitting motion to fast
and loose pullies upon the supplementary shafts which I have before referred to aš

page_text: being provided with pullies driven from the pulley upon the saw spindle for
feeding the wood to the saw. Within brackets carried by the saw bench and
capable of sliding therein I provide a strap guide, the strap forks of which so act
upon the two straps passing around the fast and loose pullies before referred to,
that when the said guide is in a central position the loose pullies only revolve, but
when slidden in one direction or the other the supplementary shaft before referred
to will be caused to be rotated either in the direction for feeding the wood to the
saw or in an opposite direction one of the before named belts being crossed for
this purpose.
Upon the supplementary shafts above referred to and fast thereon I mount
pullies around which I pass an endless belt or strap by which the motion of the
feed roller at one end of the saw bench is transmitted to the feed roller at the
other end.
In place of the above named straps or belts for transmitting motion from the
saw spindle or shaft to the before named rollers I propose in some cases to use
gearing such gearing I drive through the medium of suitable friction discs, cones
or rollers or equivalent apparatus.