Improvements in Guarding Circular or other Saws.
Year: 1892

page_text: Date of Application, 8th Jan., 1892
Complete Specification Left, 14th Mar., 1892-Accepted, 16th Apr., 1892
PROVISIONAL SPECIFICATION.
Improvements in Guarding Circular or other Saws.
1, GEORGE SEABORN PARKINSON of No. 2, Lilyville Road, Fulham, London,
Gentleman, do hereby declare the nature of this invention to be as follows:-
Over that part of the circular saw which projects above the bench I carry a
curved or hinged guard of metal which entirely shields the teeth.
This guard is attached to a cross-bar above the saw and lifts automatically as
required immediately on the board to be cut coming into contact with it, and on the
board passing from under it, it again drops upon the bench and so bars contact of
the workman's fingers with the saw, and while thus protecting from mutilation
does not in any way impede the usual operations in circular saw cutting. In
respect of band or frame saws the same lifting action would be used, but the
form of the guard would be adapted to the shape of the saw.
Dated this Sixth day of January 1892.
GEORGE SEABORN PARKINSON.
COMPLETE SPECIFICATION.
Improvements in Guarding Circular or other Saws.
1, GEORGE SEABORN PARKINSON of No. 2, Lilyville Road Fulham, London,
Gentleman 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 :-
Over that part of the circular-saw which projects above the bench, I carry
a curved and hinged guard of metal which entirely shields the teeth.
This curved guard is attached to a cross-bar above the saw and lifts auto-
matically immediately on the board to be cut coming into contact with it, and
on the board passing from under it, it immediately drops upon the bench.
In the matter of frame or band saws the same process of lifting would apply
where possible to be used, but the form of the guard would be adapted to the
form of the saw.—(A).
To describe more in detail, the guard would be constructed in two parts, each
part separately hinged and acting independently.
"
17
On the board being pushed forward and coming into contact with the
"advance
(or finger) guard in front (No. 1) it immediately and automati-
cally lifts the guard upon itself, and as a consequence the " body (or saw)
guard (No. 2) is similarly raised, and pressing onwards and being cut as usual by
the saw, on reaching the back it raises up, and passes under the "rear" guard
(No. 3) without the least obstruction.
Immediately on the wood passing from under the. "advance" guard, the guard
drops upon the bench, and so bars the fingers from accidental contact with the
saw, thus protecting from mutilation without in any way interfering with the usual
operations in circular saw cutting.
The cross-bar admits of being raised or lowered as desired and permits of
different sized guards being easily slipped on or off for adaptation to the size
of different saws.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim, is,
-
1. Making the "guard" in two separately hinged pieces.
2. Making the lifting portion of the guard in front, at such an angle as to lift
itself automatically upon the wood.
3. Making the finger guard so as to drop upon the bench immediately the
wood has passed from under it, and thus protecting the fingers from contact with
the saw.
4. Making the back portion of the guard to lift outwards and while still
protecting, giving free passage for the wood.
5. Making the cross-bar to be raised or lowered for adjusting different sized
guards to suit different sized saws.
Dated this 14th day of March 1892.
GEORGE SEABORN PARKINSON.