Improvements in Circular Saw Guards.
Year: 1898

page_text: Date of Application, 22nd Oct., 1898
Complete Specification Left, 22nd July, 1899—Accepted. 26th Aug.. 1899
Date of Application, 4400 Oct., 1890
Complete Specification Left, 22nd July, 1899-Accepted. 26th Aug. 1899
Improvements in Circular Saw Guards.
I, FREDRICK HENRY KEANE, of 149, Upper Sheriff Street, Dublin, Ireland,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has reference to improvements in guards for circular saws
whereby the same may be used with greater safety than hitherto, and accidents
thus prevented, as also the possibility of the timber being shot back from
the saw.
In carrying out my invention I propose in the first instance to mount an
adjustable steel sliding plate in a suitable groove arranged below the top surface
of the bench, and operated longitudinally by means of a coarse pitch screw.
This plate which is tapered like a wedge so as to prevent the timber from
binding at back edge of saw-moves in the same vertical plane as the saw, a
portion of the front end being curved to correspond to the curvature of the saw,
and provided with a hinged guard which partly overlaps the top segment of the
saw and is adjusted to suit various diameters by means of a suitable set screw.
The sliding plate with its hinged guard is held in a vertical position by means
of transverse stay rods the free ends of which are carried in suitable standards
fixed on the opposite side of the bench.
My improved saw guard may be readily adjusted, and its action is extremely
simple.
It acts as a guide to the operator and assists in cutting true.
It permits of a clear and uninterrupted view of the work being done, and
will take in, the smallest to the largest saw of bench.
It prevents the timber being shot backwards as it completely protects the saw
at back and top, leaving the front portion only, in view of the operator.
The guard may be used on rack benches held in position by means of stay rods
and standards attached at the back of bench without the sliping plate.
Dated this 20th day of October 1898.
J. K. FAHIE & SON,
Agents for Applicant,
9, Westland Row, Dublin.
I, FREDRICK HENRY KEANE, of 149, Upper Sheriff Street, Dublin, Ireland,
Engineer, 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:-
This invention has reference to improvements in guards for circular saws

page_text: whereby the same may be used with greater safety than hitherto, and accidents
thus prevented, as also the possibility of the timber being shot back from
the saw.
Reference to the accompanying drawings will enable my said invention to be
readily understood and carried into practice.
Fig. 1 is a side elevation of portion of an ordinary circular saw bench, shewing
the application of my improved guard, and
Fig. 2 is a transverse sectional view of same.
Similar letters of reference indicate corresponding parts in each of the views.
A is a suitably formed plate of steel or other suitable material which slides
in suitable slots formed in the bench A¹.
This plate the front end of which is recessed to accommodate the curvature
of the saw is carried by two horizontal rods B, B, projecting from the cross-
head B, which latter is supported on standards C, C, the lower ends of which
pass vertically through a sole plate ), as also through the bench A¹.
The cross head also carries a square threaded vertical screw E, the point of which
screws through the sole plate D, and also passes through the bench, as in the case
of the standards C, C.
This screw is operated by a hand wheel F, whereby the sliding plate A may be
raised or lowered according to requirements.
To the front end of the plate A, is hinged a curved overlapping plate H-called
for convenience a "
tongue "which projects over the top segment of the saw as
shewn.
A rod J, is pivotally connected to the free end of this tongue while its opposite
end is screw threaded and passes through an adjustable nut K, carried in a lug J,
fixed on the sliding plate A.
By means of this nut the tongue may be raised or lowered in sympathy with
the plate A, according to the diameter of the saw in the bench.
Horizontal slots P', (only one visible in the figure) are provided for the passage
of the horizontal rods B, B, to accommodate the longitudinal movement of the
sliding plate.
From the above description it will be seen that my improved guard may be
readily adjusted to suit any size of saw and its action is extremely simple.
It serves as a guide to the operator and assists in cutting true.
It permits of a clean and uninterrupted view of the work being done, and
will take in, the smallest to the largest saw of bench.
It prevents the timber being shot backwards as it completely protects the saw
at back and top, leaving the front portion only, in view of the operator.
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 In connection with circular saws the use of a guard consisting of a
sliding plate A, in combination with a curved overlapping plate H, constructed,
arranged, and operating substantially in the manner and for the purpose specified
and set forth.
Second: In combination with circular saws the use of an adjustable guard con-
sisting of a longitudinally movable plate A, and an adjustable curved overlapping
plate H, arranged and operating substantially as herein described and illustrated
in the accompanying drawings.
Dated this 21st day of July 1899.
5
J. K. FAHIE & SON,
Agents for Applicant,
9, Westland Row, Dublin.