Improvements in Guards for Circular Saws.
Year: 1899

page_text: Date of Application, 22nd Sept., 1899.
Complete Specification Left, 20th Nov., 1899-Accepted, 6th Jan., 1900
Improvements in Guards for Circular Saws.
I, SYDNEY DREW, of 68, Queen Street, Lower Moss Lane, Manchester, in the
County of Lancaster, Cabinet Maker, do hereby declare the nature of this
invention to be as follows:-
My invention relates to improvements in guards for circular saws, and the
object of my invention is to make a simple and convenient guard for such saws.
In applying my improved guard to a circular saw bench I secure to a bracket
at the back of the bench or to the bench in line with the saw, a steel or other
metal blade preferably about one guage thicker than the saw.
This blade is
set on edge and is curved and extends over the saw and preferably a short dis-
tance beyond its centre and thus protects the workman both in front and also
at the back of the saw, when a man is employed at the back.
The guard also prevents the timber getting caught when it is drawn away
from the saw.
1
T
C Cadnhan 1800
H. B. BARLOW & GILLETT,
Agents for Applicant.
Improvements in Guards for Circular Saws.
I, SYDNEY DREW, of 68, Queen Street, Lower Moss Lane, Manchester, in the
County of Lancaster, Cabinet Maker, 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:-
My invention relates to improvements in guards for circular saws, and the
object of my invention is to make a simple and convenient guard for such saws.
I secure to a bracket at the back of the saw bench, or to the bench in line
with the saw, a steel, or other metal blade in its main part preferably about
one guage thicker than the saw, which enables it to act to wedge open the cut
made by the saw, set on edge and extending over the saw and preferably to a
short distance beyond its centre so as to protect the workmen both in front
and at the back of the saw.
The guard also prevents the timber getting caught when it is drawn away
from the saw.
The accompanying drawing represents an arrangement in accordance with
my invention, Figure 1 being a side elevation and Figure 2 a plan. A is the

page_text: saw and B the bench. C is the guard which extends along the rear and over
the top of the saw in the same plane as that in which the saw rotates. The
guard C, is of somewhat greater thickness than the saw except at the part c
nearest to the rear of the saw where it is of less thickness as shewn in Figure 3
which is a section on the line 1, 2, Figure 1 so that the material as it is sawn
moves along on each side of the guard which is received in the cut in the
material made by the saw and acts not only as a guard but also as a wedge to
open the cut and thus it facilitates the action of the saw. The guard C, is
held at the rear of the bench between two check pieces d which are secured to
the bench by a tee headed bolt e and screw nut f the said tee head engaging
in recesses or grooves in the two cheek pieces d. The guard C is secured
rigidly in position by means of a headed screw bolt g with a nut h screwing
upon it, the said bolt passing through a hole in the guard preferably suffi-
ciently long to allow the guard to be adjusted towards and away from the saw.
By tightening up the screw h the check pieces d are caused to clamp the
guard C, firmly between them. I have shewn, connected to the front of the
guard C, an additional piece C³ which may be used when it is desired also to
cover the front part of the saw above the work. This piece C2 is centred at i
to the guard C by a screw bolt j provided with a screw nut and the said
piece C may carry a roller or rollers which will run on the work if the
piece C² be left free to turn on the bolt ; but if desired the piece C2 may be
adjusted so as just to clear the work and be fixed by tightening up the screw
nut k
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is-
1. A saw guard consisting of a piece such as C, secured at the rear of the
saw in the plane in which the saw rotates and at the part next the rear of the
saw, of a thickness not greater than that of the saw so that the material being
operated on passes on either side of the guard which is received in the cut
made, substantially as herein before described.
2. A saw guard consisting of a piece such as C, secured at the rear of the
saw in the plane in which the saw rotates and at the part next the rear of the
saw of a thickness not greater than that of the saw and increasing in thickness
so that it acts as a wedge to open the cut in the material whilst the saw is
operating thereon, substantially as herein before described.
Dated this 20th day of November 1899.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.