Improvements in and relating to Circular Saw Frames.
Year: 1899

page_text: Date of Application, 4th May, 1899
Complete Specification Left, 31st Jan., 1900-Accepted; 17th Mar., 1900
PROVISIONAL SPECIFICATION.
Improvements in and relating to Circular Saw Frames.
We, ADAM EASTON KNOX and ROBERT KNOX, both of 47, Crownpoint Road,
Mile-End, in the County of the City of Glasgow, Engineers, do hereby declare
the nature of our invention to be as follows:-
This invention has reference to improvements in and relating to circular saw
frames or benches.
According to our improvements we adjust or raise and lower the table by form-
ing teeth on the vertical slides or guide aprons of table; and between the slides
we fit a shaft on which is mounted discs having scroll projections on their outer
side faces which gear into teeth on vertical slides, and as the discs are turned the
table is raised or lowered to the adjustment required. A toothed wheel is mounted
on the shaft, being preferably cast in one with one of the discs, and this wheel
is turned by a pinion attached to a hand wheel.
A modified arrangement of the foregoing is to use only one guide apron. This
apron would lie parallel to the side frame or cheek of saw bench and have a
series of teeth on it lying in about the same vertical plane as the saw spindle.
These teeth would be acted on by a scroll disc. The axle of scroll disc would
lie in about the same vertical plane as saw spindle and be mounted in a bearing
and the outer end of axle would be provided with a hand wheel to give the desired
adjustment.
The "fence" for regulating the breadth of wood to be sawn is adjusted by fixing
same on a spindle mounted in suitable guide bearings. For more minute adjust-
ments one end of this spindle is screw threaded and an internal screw threaded
hand wheel or nut is mounted over same, so that when the nut is turned the spindle
gets longitudinal movement to adjust the fence to the position desired. A groove
is formed in the nut into which bears a forked arm or clutch attached to one of
the guide bearings so that when the hand wheel or nut is turned it is prevented
from moving on end but the spindle receives the desired amount of longitudinal
movement.
1000
COMPLETE SPECIFICATION.
Improvements in and relating to Circular Saw Frames.
We, ADAM EASTON KNOX and ROBERT KNOX, both of 47, Crownpoint Road,
Mile-End, in the County of the City of Glasgow, 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 reference being made to the accompanying drawings:-
This invention has reference to improvements in and relating to circular saw

page_text: And in order that our said invention and the manner of carrying same into
practice may be properly understood; we have hereunto appended two sheets of ex-
planatory drawings in which Figure 1 is an end'elevation, Figure 2 a side elevation
and Figure 3 a plan view of a circular saw frame, having our improvements applied
thereto. While Figures 4 and 5 are detached sectional views at right angles to
each other illustrating a nut and clutch on spindle on which saw fence is mounted.
Figures 6 and 7 represent views corresponding to Figures 1 and 2 of a modification
of machine in which only one guide apron is used.
Referring to these drawings:-
According to our improvements we adjust or raise and lower the table A by
forming teeth a on the vertical table slides or guide aprons A¹; and between
the slides Awe fit a shaft B. on which is, mounted, disc wheels B having scroll
projections b on their outer side faces which gear into the teeth a on the vertical
slides A¹ and as the discs B are turned the table is raised or lowered to. the adjust-
ment required. A toothed wheel C is mounted on the shaft B. being preferably
cast in one with one of the discs B, and this wheel is turned by a pinion mounted
on a hand operated spindle C².
In the arrangement shown in Figures 6 and 7 only one guide apron-A' is used.
In this case the apron A would lie parallel to the side frame or cheek of saw
bench and have a series of teeth on it lying in about the same vertical plane
as the saw spindle. These teeth would be acted on by a scroll disc B. The
axle B2 of scroll disc B would lie in about the same vertical plan as saw spindle
and be mounted in a bearing, and the outer end of axle would. be provided with
a hand wheel C2 to give the desired adjustment.
"
A
The fence" D for regulating the breadth of wood being fed to saw is adjusted
by fixing same by a screw pin D3 on spindle D' mounted in suitable guide bear-
ings at D2
An internal screw threaded hand wheel or nut, dis mounted over
the screw threaded end of spindle D₁ so that when the nut is turned the spindle D
gets longitudinal movement to adjust the fence D to the position desired.
groove d² is formed in the nut into which bears a forked arm or clutch d³
formed on or attached to a bracket secured to underside of table so as to prevent
the nut working off the spindle. The hand wheel is only used for the final
exact adjustment of fence D. The usual manner of adjustment is to slacken the
set screw D³ push the fence D to the approximate position by hand and then tighten
the set screw D3 and make the exact adjustment by the hand wheel d.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
First. In circular saw frames the arrangement of disc wheel or wheels with scroll
projections, acting in combination with toothed guide apron or aprons, to adjust
or raise and lower the table, substantially as herein described in reference to and
shown in the accompanying drawings.
Second. In circular saw frames the arrangement of fence mounted on spindle
in combination with grooved nut and clutch, substantially as herein described
in reference to and shown in the accompanying drawings.
Dated the 20th Tonvow 1000
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents..