Improvements in Guards or Protectors for Circular Saws.
Year: 1899

page_text: Date of Application, 8th June, 1899-Accepted, 8th July, 1899
COMPLETE SPECIFICATION.
Improvements in Guards or Protectors for Circular Saws.
I, ROBERT PEACOCK, of 10, Victoria Road, Shoreham, in the County of Sussex,
Manager, Steam Saw Mills, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement;-
This invention relates to improvements in guards or protectors for circular saws
and has for its object to provide an efficient guard to the workman when using
the saw whilst at the same time permitting him to have an uninterrupted view
of the work during the process of sawing.
It also includes means for preventing the work or plank being operated upon
from being drawn back by the saw, or coming in contact with its teeth, after
the operation of sawing is finished.
According to this invention the improved guard consists of two side arms or
uprights connected together at a suitable distance apart, by cross-bars or rods.
The lower ends of these arms or uprights are in the form of rods or spindles which
pass through or engaged with holes formed in sockets or brackets carried by a
plate supported between longitudinal guides formed on the side of the bed-plate
of the machine. The said plate is formed with a slot through which passes a
screw fixed to the bed-plate and fitted with a wing or other nut for fixing the
plate in position, the slot permitting the shifting or sliding of the guard to the
required position opposite the saw.
The arms or uprights are curved at the top so as to extend over the saw, form-
ing thereby, with the connecting cross-bars or rods, an efficient guard to the saw.
The height of the guard above the saw is adjusted by shifting the lower ends
or spindles of the side arms in the sockets or brackets through which they pass
and fixing them by set-screws thereto.
I may also combine with the said guard a pivoted stop for preventing the work
or plank that is being operated upon from being drawn back, or coming into con-
tact with the saw teeth, after the sawing is finished. The said stop consists of a
bar pivoted to a bracket clamped to the upper bars or rods of the guard by means
of a nut or thumb-screw, engaging with a screw or stud fixed to a lower clamp-
ing plate of the bracket and passing through an upper plate thereon.
The said bars assumes an angular position, and as the plank or work is pushed
forward it raises the bar or stop so that the lower end of the latter rests upon the
top of the plank.
When the plank is clear of the stop the latter falls down behind its rear end
in front of the saw and prevents it being drawn back, or accidently pushed
against the teeth of the saw.
In the accompanying drawing is represented two views of my improved saw
guard, Fig. 1 being a side elevation and Fig. 2 a vertical cross-section thereof.
a, a are the two side-arms connected together by the cross-bars or rods b. Tho
upper ends of the arms are curved over towards and above the saw c and their
lower reduced ends or spindles a pass through holes in the sockets or
brackets d, d.
These latter are mounted upon or form part of a plate e fitted so as to slide in

page_text: the longitudinal guides f and formed with a slot g through which passes the
screw or stud fixed to the bed plate i, and provided with the wing or other nut k
for clamping it to the bed-plate.
By means of the slot 7 the plate e, and with it the guard, may be shifted and
secured in the required position by the screw h, and nut k, the said apparatus
serving not only as an efficient guard but enabling the operator to view his work
as it proceeds without shifting any of the parts or stopping the machine.
The improved guard is also shown as provided with the pivoted stop comprising
the bar pivoted at to the bracket m which is clamped to the upper bars or
rods of the guard by means of the screw or stud n, fixed to the clamping plate o,
and nut screwed down on to the plate m¹ of the bracket.
The stop is provided with several holes for adjusting its pivotal centre
according to the depth of the plank q being operated upon.
This improved stop operates as follows:-As the plank g, which is guided by
the fence or gauge in the ordinary manner, is pushed or fed towards the saw,
its front end bears against and raises the lower bevelled or curved end of the
bar so that as the plank continues to travel the said lower end of the bar rests
upon the upper edge of the plank, and as the rear end of the latter clears the
saw the bar drops down between it and the saw, as shewn in dotted lines in
Fig. 1, thus protecting the teeth of the saw and preventing the plank being
drawn, back by its motion.
When operating upon planks of considerable depth the said stop may be sub-
stituted by another fitted with a bar of lesser length or proportions.
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
(1) The improved guard or protector for circular saws comprising two side
arms or uprights connected, at a suitable distance apart, by cross-bars or rods,
and supported at their lower ends in sockets, or brackets carried by an adjustable
plate fitted to travel between guides on the side of the bed-plate or frame of the
machine, the said arms or uprights being curved at the top so as to extend over
the saw where they are also fitted with cross-bars or rods, substantially as
described.
:
(2) In guards or protectors for circular saws the combination of the side
arms a, a, the cross-bars or rods b, the sockets or brackets d, the plate e, guides f,
slot g, screw or stud h, and nut arranged and operating substantially as
described.
(3) In saw guards or protectors as specified in Claim 1, the combination there-
with of a stop consisting of a bar pivoted at to a bracket m clamped to the
bars or rods by means of a screw n, clamping plate o, and nut p substantially as
described.
Data: 111
T
1000
J. B. FLEURET,
Agent for the Applicant,
5, Hatton Garden, Holborn Circus, London, E.C.