Improvements in or connected with Guards or Protecting Apparatus for Circular Saws and analagous Toolr.
Year: 1899

page_text: Date of Application, 4th Nov., 1899
Complete Specification Left, 6th June, 1900-Accepted, 3rd Nov., 1800
Improvements in or connected with Guards or Protecting Apparatus
for Circular Saws and analagous Toolr.
We, JONATHAN BODGER, of Helvellyn, Fletton Avenue, Peterborough, in the
County of Huntingdon, Timber Merchants' Manager, and DAVID HANDFORD, of
Bridge End, Peterborough, in the County of Huntingdon, Engineer, do hereby
declare the nature of this invention to be as follows.-
The
The object of this invention is to provide simple and efficient means for guard-
ing or covering circular saws and analagous tools so as to prevent accidents
thereto or thereby, the said means being such that the part of the saw or tool
which is above the bench is so covered as to prevent articles and persons from
accidentally coming into contact therewith whilst at the same time it will adnut
of any object being properly presented to the action of the tool, (which we will
hereinafter refer to as a saw) the said guard being raised by the article as it 18
being pushed towards the saw and after the article has passed the aw the said
guard will automatically descend so as to cover and protect the whole of the
portion of the saw projecting above the bench In apparatus constructed accord-
ing to this invention the part of the guard which may be termed the hood may
consist of two cheeks between which sufficient space is left for the saw. Pro-
jecting at an inclination from the upper part of the hood is a sleeve or socket
through which passes a rod or bar on which the sleeve or socket can slide
said rod or bar is fixed to an arm mounted on a post or pillar fixed to the saw
bench the said arm being capable of being turned on the post or
pillar and of
being fixed by a clamping screw. The hood at its front end, that is the end at
which the article to be operated on is inserted, is provided with a curved or
upwardly inclined projection beneath which the article to be acted on by the saw
is pushed towards the said saw, the hood being thereby raised to admit of the
article passing beneath the hood which is caused to rise (by its sleeve or socket
moving up on the inclined rod or bar) it resting on the top of the article being
perated on As soon as the article has passed from beneath the hood the said
hood will by its gravity descend onto the bench and cover the other wise exposed
portion of the saw The aforesaid sleeve or socket on the hood has on it a
atud or projection with which, when the hood is raised above the saw, a hook
or catch carried on the arm herein before described, can be caused to engage ao
as to retain the hood in its elevated position, or other suitable engaging devices
may be used for this purpose When the hood is thus retained in its elevated
position, and the clamping screw which fixes the arm to the post or pillar is
released, the guard can be turned, as on a pivot, on the post, or pillar
to be out of line with the saw, or the said arm and the hood can if desired be
removed from the post or pillar The post or pillar is preferably removably fixed
to the bench for example by the lower end of the said post or pillar being screw-
threaded and passed through a slot or hole in the bench and having screwed
so as

page_text: thereon beneath the bench a nut or nuts whereby the said post or pillar can be
firmly and igidly fixed in position.
1 1
、
1
1000
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C, Agents.
Improvements in or connected with Guards or Protecting Apparatus
for Circular Saws and analogous Tools.
We, JONATHAN BODGER, of Helvellyn, Fletton Avenue, Peterborough, in the
County of Huntingdon, Timber Merchants' Manager, and DAVID HANDFORD, of
Bridge End, Peterborough, in the County of Huntingdon, Engineer, do hereby
declare the nature of this invention and in what manner the same is to be pei-
formed to be particularly described and ascertained in and by the following
statement.
-
The object of this invention is to provide simple and efficient means for guard-
ing on covering encular saws and analogous tools so as to prevent accidents
thereto or thereby the said means being such that the part of the saw or tool
which is above the bench is so covered as to prevent articles and persons from acci-
dentally coming into contact therewith whilst at the same time the guard or cover
will admit of any object being properly presented to the action of the tool (which
we will hereinafter refer to as a saw) the said guard being raised by the article as it
1s being pushed towards the saw and after the article has passed the saw the said
guard will automatically descend so as to cover and protect the portion of the
saw which projects above the bench In apparatus constructed according to this
invention the part of the guard which may be termed the hood, may consist of
two cheeks between which sufhcient space is left for the saw. Projecting at an
inclination from the hood is a sleeve or sochet through which passes a lod or
hat on which the sleeve or socket can slide, the said iod and sleeve constituting
an inclined guide for the movements of the hood The said 1od or bar is fixed by
a clamping sciew to an arm mounted on a post or pillar fixed to the saw bench
the said arm being capable of being turned on the post or pillai and of being
fixed by a clamping sciew We will describe the invention with reference to the
accompanying drawings of which Figure 1 represents in side elevation a saw
bench provided with a saw guard constructed and arranged according to this
invention, the said guard being shewn in its not mal position Figure 2 is a plan
of the same and Figure 3 is a view similar to Figure 1 but shewing the guaid
turned away from the saw A. 18 the saw bench having bearings in which the
spindle of the saw B 1otates, a portion of the saw projecting above the top of the
bench as usual C is a guard of hood comprising two cheeks c connected together
at their front ends by an upwardly curved projection and at or near the top by
an upwardly inclined sleeve or socket C¹ through which passes a 1od o bar D
adjustably attached by a clamping sciew E to a horizontal rod oi am mounted
in a socket Gin a piece H fixed by a clamping sciew h on the
upper end of a post or pillai I standing up from the saw bench A The sleeve or
socket C on the hood C 18 free to slide up and down the rod or bar D the hood C
in its normal position rosting on the saw bench A as shown by full lines in
Figure 1 or it may, in its normal position, he maintained at a short distance
above the saw bench by a projection d on the lower end of the rod or bar D as
shewn by dotted lines in Figure 1, if the article to be operated on by the saw
1s too thick to enter beneath the projection when the hood is resting on the

page_text: bench The article to be acted on by the saw is pushed beneath the upturned
projection towards the saw, the hood being thereby raised to admit of the
article passing beneath it, the sleeve or socket C moving up on the inclined rod
or bar D until the hood rests on the top of the article being operated on by the
Baw
As soon as the article has passed from beneath the hood the said hood will by
its gravity descend and cover the otherwise exposed portion of the saw. The
sleeve or socket ¹ on the hood C has on it a stud or projection with which,
when the hood 18 raised above the saw, can be engaged by a hook or catch d
carried on the clamping screw E by which the rod D is clamped to the arm F,
so as to retain the hood in its elevated position, or other suitable engaging devices
may be used for this purpose. When the hood is thus retained in its elevated
position, and, the clamping screw which fixes the aim F to the post or pillar I
is released, the arm F can be turned round on the post or pillar I so as to move
the guard or hood C out of line with the saw, or the arm F and parts carried
thereby can, if desired. be entirely removed from the post or pillar when the
clamping screw h is released
The post or pillar I is preferably removably fixed to the bench A for example
by a bolt as shewn at passing through a hole in the saw bench and screwing
into the lower end of the said post or pillar, or the lower end of the post or pillar
may be screw-threaded and the screwed end be passed through a slot or hole in the
bench and have screwed thereon beneath the bench a nut or nuts whereby the
said post or pillar can be firmly and igidly fixed in position
Having now particularly described and ascertained the nature of this
invention and in what manner the same 18 to be performed we declare that what
we claim is -
1 In a guard or protecting apparatus for circular saws and analogous tools,
the combination with a hood or cover for the tool, of an inclined guide for the
movements of the hood or cover, and an inclined or upwardly curved projection
on the front end of the hood or cover against which projection the niticle to be
acted on by the tool is pressed whereby the hood or cover is caused to rise in an
inclined duection until it rests on the article substantially as hereinbefore
described.
2 In a guard or protecting apparatus for circular saws and analogous cutting
tools the combination with a hood or cover for the tool, of an inclined sleeve or
socket projecting upward from the hood or cover, a stationary inclined rod or bar
passing through the sleeve on socket, on which rod or bar the hood can slide, and
a projection on the hood or cover against which the article to be acted on by the
tool is pressed, so as to cause the hood or cover to rise substantially as herein-
before described.
3 The combination in a guard or protecting apparatus for circular saws and
analogous tools of a hood or cover for the tool, an inclined guide for the move-
ments of the hood or cover, an engaging device for retaining the hood or cover
above the tool, a support for the hood or cover and the inclined guide, and means
for adjusting the position of the hood or cover either over the tool or away from
the tool, substantially as herem before described
4 The combination of parts constituting the improved guard or protecting
apparatus for circular saws and analogous tools substantially as herein before
described and illustrated by the accompanying diawings
Dated this 6th day of June 1000
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, WC, Agents.