Improvements in Wood Sawing Machinery.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Wood Sawing Machinery.
I, JOHN KERSHAW, of Railway Iron Works, Hebden Bridge, in the County of
York, Saw Mill Engineer, do hereby declare the nature of this invention to
be as follows:-
My invention relates to further improvements upon Patent No. 14913 dated
July 6th 1896, and has for its object the dispensing with the compound slide
therein employed, and mounting the feed roller upon suitable rocking arms,
pivotted upon longitudinal shafts, these rocking arms are attached or hinged
to a horizontal bar or journal carrying the feed roller, the feed roller is arranged
to tilt to any angle required in the usual way; a cross bar at or near the bottom
of, and attached to these rocking arms and operated upon by a screwed shaft and
hand wheel, adjust the position of the feed rollers longitudinally.
By these means however acute the angle of the feed may be, there is no
friction, as when the feed roller is moved towards the saw, the bar or journal
carrying the same remains horizontal, therefore there is no variation in the angle
of the feed roller which always remains in a fixed position for any kind of angle
cutting.
Dated this Twenty-eighth day of October 1898.
Improvements in Wood Sawing Machinery.
I, JOHN KERSHAW, of Railway Iron Works, Hebden Bridge, in the County or
York, Saw Mill Engineer, 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:—
My invention relates to further improvements upon Patent No. 14913 dated
July 6th 1896, and has for its object the dispensing with the compound slide
therein employed, and mounting the feed roller upon rocking arms by means
of which when the angle of the feed is once set there is no variation, no matter
what thickness of timber is being fed to the saw, as the rocking arms in moving
on their pivots to or from the saw, always maintain the angle of the feed rollers
in the position originally fixed.

page_text: DESCRIPTION OF DRAWINGS.
Fig. 1 is a side elevation of my improved roller feed circular saw bench, with
frame in section.
Fig. 2 is an end elevation of Fig. 1.
At or near the bottom of the saw bench, and within the frame A, I fix two
short horizontal shafts B B, these shafts are carried by the machine frame, and
a suitable hanger or journal C, and have mounted upon them the rocking
arms D D; these rocking arms are attached or hinged to an adjustable bar or
journal E, through which passes the feed roller shaft F. For driving the feed
rollers G, I mount upon the shaft F a bevel wheel H, having an extended boss H¹
upon each side, one boss working in the journal J of the adjustable bar E, and
the other in a swell K upon a small horizontal shaft L; this shaft is carried by
suitable arms M upon a lower vertical driving shaft N, this shaft also passes
through the adjustable bar E and has a loose bevel wheel P upon it, the boss
of which revolves within the journal of one of the arms M, the wheel P is driven
by a third gear wheel R upon the lower vertical shaft N, and is for communica-
ting motion to the feed roller shaft, but being loose, allows of an easy adjustment
of the angle of the feed rollers.
Upon the lower vertical shaft is a second hinged journal R', whose arms S
slide and hinge upon a longitudinal shaft T, (passing between the short horizontal
shafts B B carrying the rocking arms), operated by worm wheel T, worm T2,
and cone pulleys T3 from the saw spindle T. Below this journal R¹, and at
one end of the vertical shaft N, is another bevel wheel U, driven by a similar
wheel Vupon the longitudinal shaft T.
For adjusting the position of the feed rollers to and from the saw, I employ
an L bracket. W, whose boss is secured by set screws within an arm S of the
journal R¹, a second bracket X being mounted upon the hanger C, a screwed
spindle Y secured to the L bracket and passing through the bracket, has a hand
wheel Z at one end, by means of which the feed rollers and the mechanism for
tilting and operating the same are moved bodily for the purposes described; a
journal Z mounted upon the boss of the rocking arms supports and steadies one
end of the longitudinal shaft T, though sliding easily upon same, during the
aforesaid adjustment.
Keys and keyways 2 are provided in the boss H¹ and shaft N respectively
so that the wheel R may adjust itself upon the shaft according to the varying
distances from centre to centre of the shafts L and T during the movement of
the rocking arms.
The shaft L acts as a pivot for the feed roller shaft F and such shaft is
adjusted as to its angle with the lower vertical shaft by the quadrant slot and
bolt in the manner shown and described in my former Specification No. 149139.
By this construction of tilting mechanism for wood sawing machinery any
angle of feed required may be obtained, the feed rollers working as effectively
at an acute angle as in a vertical position, and when once the angle of the feed
rollers has been set, whatever movement is given to the rocking arms according
to the varying thickness of timber being sawn, the feed still remains the same.
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. In wood sawing machinery the use and employment of rocking arms D D,
carrying the feed mechanism for the purposes substantially as set forth.
2. In wood sawing machinery the combination of the rocking arms D D,
hinging upon shafts B B, shaft L having a swell K, arms M, the shaft N gear
wheels H, P, and R, for operating and adjusting the feed mechanism, in the
manner and for the purposes substantially as set forth.
3. In wood sawing machinery the combination with rocking shafts D hinging
upon shafts B B and carrying the feed mechanism, of vertical shaft N, journal R
*

page_text: bracket W, standard X screwed spindle Y and hand wheel Z and journal Z,
in the manner and for the purposes substantially as described.
4. In wood sawing machinery the use and employment of rocking arms D D,
shaft L, swell K, arms M, gear wheels H, P, and R, shaft N journal R¹ having
arms S, bracket W, standard X, screwed spindle Y hand wheel Z and journal Z¹
operating in the manner and for the purposes substantially as shown and
described.
D
11 .
JOHN E. WALSH,
Waterhouse Chambers, Crossley Street, Halifax,
Patent Agent for the Applicant.