Improvements in Mechanism for Adjusting the Table of Circular Saw Frames.
Year: 1893

page_text: Date of Application, 6th Dec., 1893
Complete Specification Left, 5th Sept., 1894-Accepted, 6th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements in Mechanism for Adjusting the Table of Circular
Saw Frames.
We, ADAM EASTON KNOX, and ROBERT KNOX, both of 47 Crownpoint Road,
Glasgow, Lanarkshire, Engineers, do hereby declare the nature of our invention
to be as follows:-
This invention has reference to and comprises a new or improved construction
or arrangement and combination of the parts of mechanism or appliances for
adjusting or raising and lowering the table of circular saw frames or benches.
The improvements essentially consist in mounting near each end of the circular
saw frame, a segmental link worm quadrant or wheel both geared and operated by
worms on a longitudinal hand actuated shaft. These link quadrants would be
connected to rocking or oscillating spindles, cranks or levers, and these in turn
would be connected through journal or swivel pins or loose joints to the lower end
of underhung lugs secured on the under surface of the table to be raised or
lowered.
In carrying these improvements into practice under one arrangement the
actuating spindle would be carried in bearings in the framework of machine and
have a hand operating wheel on its one end, and have two screw worms formed on
it to gear into the teeth formed on the lower end of two segmental quadrants or
links, one near each end of the saw frame. The upper end of one of these
quadrants would be formed on or connected direct to the centre of a crank or fork
shaped rocking shaft or lever, mounted to cscillate by end journals or centres in
bearings in the side frames of the machine; while the upper end of the other
quadrant would be formed on or connected to a central radial projecting arm on
the rocking shaft. The forked or radial crank arms of this rocking shaft or lever
on the ends of the shaft, would be connected to work by eye centre studs or journals
in the lower end of underhung lugs or arms formed on or secured to the under
surface of the saw frame table. With this arrangement perfect freedom is allowed
for the action of the circular cutting saws and the table can be raised and lowered
or adjusted at will according to the direction the worin operating hand spindle is
turned. Instead of using two worms and segmental toothed quadrants, only one
need be used, and a link or lever connection taken from it to actuate in a parallel
manner the aforesaid link or rocking shaft at the other end of saw frame.
Dhe th Decembe 1000
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Mechanism for Adjusting the Table of Circular
Saw Frames.
We, ADAM EASTON KNOX, and ROBERT KNOX, both of 47 Crownpoint Road,
Glasgow, Lanarkshire, Engineers, do hereby declare the nature of our invention,
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement in writing, that is to say:-
This invention has reference to and comprises a new or improved construction
or arrangement and combination of the parts of mechanism or appliances for
adjusting or raising and lowering the table of circular saw frames or benches.
The improvements essentially consist in mounting near each end of the circular
saw frame a segmental link worm quadrant or wheel both geared and operated by
worm on a longitudinal hand actuated shaft. These link quadrants would be
connected to rocking or oscillating spindles cranks or levers, and these in turn
would be connected through journal or swivel pins or loose joints to the lower end
of underhung lugs secured on the under surface of the table to be raised or
lowered..
And in order that our said invention and the manner of performing or carrying
the same into effect or practice may be properly understood we have hereunto
appended an explanatory sheet of drawings in which
Figure 1 represents a side sectional elevation of a circular saw frame and table-
as fitted with our improvements.
Figure 2 is a plan view corresponding to Figure 1 with the table removed.
Figure 3 is a transverse section as taken on the line 3-3 of Figure 1. And
Figure 4 is a detached elevation of a modified form of the mechanism.
Referring to these drawings:-In carrying these improvements into practice
under one arrangement, as shown in Figures 1 to 3 the actuating spindle 6 would.
be carried in, bearings at A in the framework A of machine and have a hand
operating wheel on its one end, and have two screw worms & formed on it to
gear into the teeth a¹ formed on the lower end of two segmental quadrants or
links a, one near each end of the saw frame A. The upper end of one of these
quadrants a would be formed on, or connected by a bolt a direct to, the centre
crank arm of a crank or fork shaped rocking shaft or lever c, mounted to oscillate
by end journals or centres c¹ on its end crank arms in bearings at A2 in the side
frames A of the machine; and centre pins c on the shaft c would be mounted in
the eyes of lugs d cast on the under side of the table B.
The upper end of the
other quadrant a would be formed on or connected by a bolt a to a central radial
projecting arm on the rocking shaft c, and this shaft would oscillate by its end
centres in the eye bearings A' of side frames A. The forked or radial crank
arms on the end of this rocking shaft c, would be connected to work by eye
centre studs or journals c¹ in the lower end of underhung lugs or arms d formed on
or secured to the under surface of the saw frame table B. With this arrangement
perfect freedom is allowed for the action of the circular cutting saws, and the
table B can be raised and lowered or adjusted at will according to the direction the
worm operating hand spindle is turned. Instead of using two worms band
segmental toothed quadrants a, only one need be used, as shown in Figure 4, and
a link or lever connection e be taken from it to the arm e² to actuate in a parallel
manner the aforesaid link or rocking shaft at the other end of saw frame.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
First. In connection with circular saw frames, the mechanism for adjusting or

page_text: raising and lowering the table, consisting of a hand operated spindle with screw
worms actuating segmental toothed quadrauts formed on or secured to rocking or
oscillating spindles, cranks or levers connected to the table, substantially as herein
described in reference to the accompanying drawings.
Second. In connection with circular saw frames the mechanism for adjusting or
raising and lowering the table consisting of a hand operated spindle with screw
worm actuating a segmental toothed quadrant formed on or secured to a rocking
or oscillating spindle, crank or lever connected to the table, and having a link or
lever connection from said quadrant to operate another rocking spindle connected
to the table, substantially as herein described in reference to the accompanying
drawings.
Datud this 4th September 1894
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.