Improvements in Apparatus for Sand-papering Wood.
Year: 1890

page_text: Date of Application, 21st Feb., 1890
Complete Specification Left, 30th Oct., 1890-Accepted, 20th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Sand-papering Wood.
I EDWARD SEDDON of 30 Wellith Lane, Rochdale in the County of Lancaster,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to the machines employed for polishing wood by means of
sand paper attached to revolving cylinders, and the object of the invention is to
obtain a perfectly smooth finish.
This propose to effect by giving to the sand papering cylinder or cylinders a
horizontal circular motion at the same time that they revolve rapidly whereby the
motion of any portion of the sand paper surface is a continuously advancing circular
motion whereby all scratches or marks made by the sand paper will be entirely
removed or prevented and a perfectly fine and smooth polish will be given to the
surface of the wood.
I mount the plummer blocks or bearings which carry the shaft of each sand paper
cylinder in such a way that they are capable of a limited horizontal movement in any
direction, and I connect each bearing by means of links or bars or two excentrics
cams or cranks which are placed at right angles to each other (or nearly so) by the
combined action of which a continuous horizontal circular motion is given to the
bearings, axles, and sand paper cylinder or cylinders, at the same time that
the ordinary revolving motion is imparted thereto by a strap and pulley in the usual
manner.
Dated this 20th day of February 1890.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Sand-papering Wood.
I EDWARD SEDDON of 30 Wellith Lane Rochdale in the County of Lancaster
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 :-
This invention relates to the machines employed for polishing wood by means of
sand-paper attached to revolving cylinders, and the object of the invention is to obtain
a perfectly smooth finish.
This I propose to effect by giving to the sand papering cylinder or cylinders a
horizontal circular motion at the same time that they revolve rapidly, whereby the
motion of any given spot or portion of the sand paper surface is a continuously
advancing circular motion, whereby all scratches or marks made by the sand-paper
will be entirely removed or prevented and a perfectly fine and smooth polish will be
given to the surface of the wood.
The nature of my said invention and the manner in which the same is to be
performed or carried into practical effect will be readily understood on reference
to the two sheets of drawings hereunto annexed and the following explanation
thereof.
Fig. 1. Sheet 1 of the drawings is an end elevation of a sand papering machine
with two cylinders and having my invention shown as applied thereto and Fig. 2
Sheet 2 is a partial plan view of the same.
a is the main framing of the machine. b, b, are the two sand papering or abrading

page_text: cylinders, each keyed on its own shaft or axle c, c', and provided with a driving
pulley d, d'.
I mount the plummer-blocks e, e¹ which carry each end of the shafts c, c¹, in
transverse slides upon the fixed bearings or brackets f, f', which support them in
such a way that they are capable of a limited horizontal movement to and fro in a
transverse direction; and at the same time the shafts or axles c, c¹, are so mounted in
the plummer blocks e e¹ that they are capable of a limited horizontal movement in a
longitudinal direction.
>
The transverse motion is given to the plummer blocks e, e', in the following manner.
Each one is connected by a link f³, to a lever g, g¹ (one of which is shewn
displayed at gx on Fig. 2) and the latter are hinged to eccentric rods h, ', the clips
of which embrace two eccentrics i, i, which are by preference placed at opposite sides
of their respective shafts k, k¹ (see Fig. 1).
These two shafts are coupled together by spur gearing represer.ted by the circles
and either of the said shafts is driven by means of a strap or by spur or other
gearing.
C
The longitudinal to and fro movement of the abrading cylinder shafts c and e¹ is
obtained in the following manner (see Fig. 1). Each of the shafts k, k¹, has keyed
upon it a bevil wheel m, ml driving a similar wheel n, n', keyed on a short vertical
shaft the upper end of which carries a disc or face plate o, o¹, in which is fixed a
crank pin p, p, and the latter revolves in a thimble q, q', the upper eye of which
embraces the axle c or c¹ between two fixed collars (see Fig. 2) and as the two
face plates o, o¹, revolve the crank pins p p¹ will thus give a to and fro motion to the
two axles c and c¹.
And it is obvious that these two movements combined will give a continuous
horizontal circular motion to the axles and the sand papering cylinders, at the same
time that the ordinary revolving motion is given to the latter by driving straps.
And by this combined action the desired compound motion will be given to any
and every point on the surface of the two sand paper cylinders 6 and b¹ as they
revolve.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
In a sand papering machine provided with a revolving cylinder or cylinders the
combination with the forward revolving motion of such cylindor or cylinders of a
circular horizontal motion substantially as and for the purposes hereinbefore described
and
Secondly, I claim the construction and application to such machines of the com-
bination of eccentrics and crank pins substantially as herein before described and
illustrated by the annexed drawings or other equivalent mechanical movement
whereby such horizontal circular motion is imparted to the abrading cylinder (or
cylinders) at the same time that the latter revolves (or revolve) in a circumferential
direction.
Dated this 29th day of October 1890.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.