Combination Circular Saw Guard and Riving Knife.
Year: 1898

page_text: Date of Application, 15th Sept., 1898
Complete Specification Left, 25th May, 1899-Accepted, 12th Aug., 1899
PROVISIONAL SPECIFICATION.
Combination Circular Saw Guard and Riving Knife.
JAMES SCOTT, 18, East Cottages, Granton, Edinburgh, Saw Mill Mechanic, do
hereby declare the nature of this invention to be as follows:-
The invention is an improved circular saw guard and riving knife and consists
of a standard fixed to the saw bench or other convenient place carrying an
adjustable arm, to the outer end of which is fixed a guard or shield in two parts
A
one overlaping the other so that it can be adjusted to suit any size of saw.
riving knife is fixed below the bench at one end on an adjustable pin and at the
other end to the guard with pin and nut or other suitable means so that it can be
adjusted to suit the requirements of any size of saw.
Jf Cantambor 1808
JAMES SCOTT, 18, East Cottages, Granton, Edinburgh, Saw Mill Mechanic, do
hereby declare the nature of this invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:
The invention is a combination circular saw guard and riving knife and
consists of a standard A. fixed to the saw bench or other convenient place carrying
an adjustable arm B to the outer end of which is fixed the guard C formed by
means of two or more planished or other steel plates which telescope into each
other so as to be lengthened to guard effectually any size of saw, one of the
plates is fixed to the arm B and the other (or others) are made to slide over it,
a horizantal groove D is cut in this slide plate (or plates) and is held in position
by the set pin E which is fixed in the supporting arm B. The riving knife is
fixed to the slide G by means of the set pin II and is allowed to slide along the
bar I Fig. 1 so as to bring the riving knife J close up to the back of any size of
saw.
The bar I is connected to two parts of the arm B which are carried up one at
either end for this purpose and at the same time to act as a frame to rivet the
stationery shield to. The riving knife J which is of the form shown in the accom-
panying drawing is of wedge section and being fixed so as to bring it directly
at the back of and in line with the saw, enters the saw draught & does not allow
the wood to close in on the teeth, it is made long enought to reach under the saw
bench and has a slot cut vertically in its lower half to allow the guard to be

page_text: raised to any desired height, it is kept perfectly rigit and in position close in on
the back of the saw by means of a pin passing through this slot and fastened
to the web usually found below all saw benches or to a special bracket.
The standard A aforesaid is placed on the same bench or other convenient
place, on this standard a nut can be wrought up or down by means of a square
cut screw with handel. To this nut is fixed the arm B which is usually of right
angle form, so as to have the standard clear of the wood to be cut and at the
same time to bring the guard close up to the outside of the saw allowing the
sawyer to see the wood being cut.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
First. The guard composed of two or more plates which telescope into each
other allowing of extension to any desired length all as set forth and shown in
drawing.
Second. The riving knife F.
Third. The whole in combination substantially as shown and set forth or any
mere modification thereof.