Improvements in and in connection with Guards for Circular Saws.
Year: 1898

page_text: Improvements in and in connection with Guards for Circular Saws.
I, THOMAS NIELD ROBINSON, of Thomas Robinson and Son, Limited, of Railway
Works, Rochdale, in the County of Lancaster, Machine Maker, do hereby declare
the nature of this invention to be as follows:-
My invention relates to improvements in and in connection with guards for cir-
cular saws.
In carrying my improvements into effect I bolt or otherwise secure on the saw
table a standard with an arm projecting over the circular saw and to this arm I
secure adjustably a suitably shaped plate which guards the upper part of the saw
and so forms the top shield. To the rear end of the top shield I pivot adjustably
a combined back guard and riving knife, the guard and knife blade being made
in one piece or preferably in two parts so that the position of the blade may be
adjusted or it may be detached and sharpened or a new blade substituted. At the
lower end the knife blade projects beyond the guard and into the saw slot in
the feed table, while the back guard rests upon and is supported by the table.
When, however, a piece of timber is fed past the saw and reaches the pivoted back
guard it lifts the guard off the table and supports it while the projecting portion
of the riving knife lies in the saw cut and so divides the cut timber.
Dated this 20th day of October 1898.
H. B. BARLOW & GILLETT,
Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements in and in connection with Guards for Circular Saws.
I, THOMAS NIELD ROBINSON, of Thomas Robinson and Son, Limited, of Railway
Works, Rochdale, in the County of Lancaster, Machine 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 and in connection with guards for cir-
cular saws.
In the accompanying sheet of drawings-
Figure 1 is a side elevation, and Figure 2 a back elevation illustrating the appli-
cation of my improvements to the guards of a circular saw.
In these views,-1 denotes the saw table, 2 the circular saw, and 3 the standard
which I bolt or otherwise secure on the saw table. The standard 3 has a slideway
in which is fitted a slide block 4 carrying an arm 5 projecting over the circular
[Price 8d.]

page_text: saw 2. An adjusting screw 6 actuated by a hand wheel 7 passes through the slide
block 4 for the purpose of raising and lowering the slide block and arm as required
and when adjusted the side block is secured in position by a lock bolt 8. On the
arm 5 I secure adjustably a suitably shaped plate 9 which guards the upper part
of the saw 2 and so forms the top shield. To the rear of the top shield I secur
adjustably by a lock bolt 10 a bracket 11 to which I pivot at 12 a combined back
guard 13 and riving knife 14, the guard and knife being made in one piece, or
preferably in two parts as shown secured together by bolts 15 so that the position
of the knife blade 14 may be adjusted or it may be detached and sharpened or a
new blade substituted.
At the lower end the knife blade projects beyond the guard 13 and into the
saw slot in the feed table, while the back guard 13 rests upon and is supported by
the table. When, however, a piece of timber is fed past the saw and reaches the
pivoted back guard 13 it lifts the said guard off the table, and supports it
while the projecting portion of the riving knife 14 lies in the saw cut and so
divides the cut timber.
Having now particularly described and ascertained the nature of my sand
invention and in what manner the same is to be performed, I declare that what
I claim is
1. In connection with a circular saw, the combination with a top shield sup-
ported adjustably on an arm carried by a standard secured to the saw table, of a
combined back guard and riving knife pivoted adjustably to the rear end of the
top shield substantially as herein set forth.
2. The general arrangement and combination of parts embodying my improve-
ments substantially as herein described with reference to the accompanying
drawing.
H. B. BARLOW & GILLETT,
Agents for. Applicant,
17, St. Ann's Square, Manchester.