and Polishing Wood.
Year: 1886

page_text: and Polishing Wood.
I, WILLIAM PHILLIPS THOMPSON of the Agency for Foreign Patent Solicitors
C Lord Street Liverpool, in the County of Lancaster and 323, High Holborn,
in the County of Middlesex Civil Engineer, do hereby declare the nature of this
invention (a communication from abroad by Porter B. Yates of Berlin, County of
Green Lake, State of Wisconsin, United States of America, Manufacturer,) 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 improvements in that class of wood-polishing machines
adapted to smooth and polish lumber by contact therewith of the sand-covered
surface of a rapidly rotating cylinder, and the invention pertains especially to the
construction of this cylinder and the mechanism for operating it.
In the accompanying drawings,
Figure 1, is a perspective of the cylinder and the attached mechanism for
operating it, parts being removed to expose other parts to view.
Figure 2, is a central vertical section of the cylinder and attached mechanism.
Figure 3, is a section of the cylinder at right angles to the section seen in
Figure 2.
•
Figure 4 is a central cross section of the cylinder on line x, x, of Figure 3.
Figures 5 and 6 are perspective views of parts of the cylinder.
Figures 7, 8 and 9 are details.
The same letters refer to like parts in all the views.
The driving shaft A is supported on and rotates in bearings B, B', on the
frame C. Motion is communicated to the shaft A by a belt from the power
supplying mechanism running upon the pulley D which is rigid on shaft A. The
polishing or sand-paper-covered cylinder, is supported on and rotates with the
driving shaft A, and consists of two sets of radial arms centrally pierced by
shaft A, each set of arms being in pairs E, E¹, and F, F¹, one set of double arms
being at or near each end of the cylinder. These radial arms, E, E¹, and F, F¹,
го

page_text: support on their outer ends segmental sectional plates G, G¹, of the cylinder upon
which the several sand surfaces are fixed. Each segmental sectional plate is
attached to the ends (on the same side of the shaft A) of the same set of
arms E, E', or F, F¹, each set of arms carrying two plates, one diametrically
opposite the other.
Along each of the straight longitudinal edges of the several segmental
plates G, G¹, is a bar a, affixed to the arms E, E or F F¹, the outer surface of
which bar is a little within the circular contour of the surface of the plates G, G¹,
which bar is provided in its outer surface longitudinally with a groove adapted to
receive a strip-like keeper b.
This keeper is held in position by screws or bolts c,. c, passing through it and
through the bar a into an iron retaining strap d, which strap d is supported in
mortises in the arms E E¹, or F, F¹, and runs just beneath and parallel with
the bar a.
Over the surface of the plates G, G¹, is placed the sand-paper covering, lined or
⚫ cushioned with carpet and sheets of rubber, which carpet, rubber and sheets of
sand paper are held in position by their ends being placed beneath the keepers b, b,
which are drawn and held down to their seats by the screws or bolts c, c.
Both sets of arms E, E³, and F, F¹ are provided with rigid collars or hubs and f
respectively.about the shaft A.
The arms of one set F F¹, are made rigid to the
shaft A, by means of set screws L, L, through the hubs f, f, turning against the
shaft, while the other set of arms E, E, and their supported devices have a short
lateral reciprocal movement on the shaft A.
To permit of this reciprocal movement, of one set of arms carrying two of the.
sectional segmental plates, the arms E E' of this set, are located outside of, and a
little distance from, the arms F, F, of the other set, and the arms E, E¹, are each
provided with rigid lugs or guides g, g, projecting inwardly which guides g, I,
enter corresponding grooves or recesses h, h, in the arms F F¹ which recesses are
adapted to receive and permit said guides to slide freely therein, whereby while
said arms E, E, are permitted to reciprocate freely on shaft A, they are caused
to rotate with the arms F, F¹ which are rigid on the shaft.
The object of this reciprocating movement is to cause the microscopic lines made
by the sand cylinder on the surface of the material being polished, to cross and
recross each other whereby a smoother surface is produced than could be otherwise
obtained. To get this reciprocating movement a sleeve H is provided encompassing
the shaft A at its end opposite the pulley D in which sleeve the shaft rotates
freely, and which sleeve in turn rotates freely in the bearing B¹. On the outer end
of this sleeve H is the fast band pulley by and through which motion is
communicated to the, sleeve from the power supplying mechanism. On the inner
end of sleeve H is the collar j rigid to the sleeve H the collar; and pulley i being
so adjusted on the sleeve H as not to permit any lateral motion of the sleeve in the
bearing B¹.
About the collar j in its periphery there is a continuous inclined or cam groove k.
The arms E and F are each provided with an arm l, rigid thereto and projecting
outwardly therefrom and diametrically opposite to each other, each of which arms
carries on its outer end a swivelled button or traveller m adapted to enter and
travel in the groove k, by means whereof when the sleeve H revolves somewhat
slower or faster than the sand cylinder, as it is intended to do, the segmental
sections of the cylinder are caused to reciprocate laterally slowly, one set on, and
the other set with the shaft A.
The segmental sectional plates G, G, and G¹ G¹, are supported in pairs, each pair
being on the outer ends of the same arms, one plate of each pair opposing or
balancing the other plate of the same pair, so that an equilibrium, not only of
weight but of centrifugal motion will be constantly maintained.
For this purpose the cylinder is preferably constructed in four parts on two
sets of double arms, but the same objects might be attained in substantially the
same manner by three or more sets of double arms with a corresponding number of

page_text: sections or segmental plates, which would be merely a modification of the form
shown in the drawings.
For convenience in constructing and making repairs, the outer arms E, E, are
each made in halves and bolted together at the centre as shown in Figures 1, 2,
4 and 6.
The sleeve H is provided with apertures n, n, for lubricating the shaft A
therethrough.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is:,
"
1. In a wood polishing machine, a rotating polishing cylinder formed in longi-
tudinal sections, which sections are connected together in pairs rigidly, the sections
in each pair being diametrically opposite each other, and at least one pair of these
sections being free to move longitudinally on its driving shaft, and being connected
with mechanism, whereby a reciprocal lateral motion is given to such sections, all
substantially as described.
2. In a wood-polishing machine, a rotating polishing cylinder formed in longi-
tudinal sections in pairs, each of which pairs has diametrically opposite sections
in combination with a sleeve H having a cam groove k rotating on the shaft of the
cylinder, and making less or more revolutions than the cylinder, said pairs of
sections being each connected with and guided by said cam, whereby a lateral,
alternating reciprocal movement of the pairs of sections is secured, substantially as
and for the purpose set forth.
3. In a wood polishing machine, the radial armis F, F, in pairs rigid on shaft A
and provided with recesses h, h, in combination with radial arms E, E¹, sliding on
shaft A, and provided with guides g, g, substantially as described.
4. In a wood polishing machine, the cylinder carrying driving shaft A provided
with pulley D in combination with sleeve H provided with pulley i and collar j,
and the collar j provided with a cam groove k, whereby a differential motion
between said sleeve and said shaft, and a reciprocal motion to be given to
mechanism connected to said sleeve and rotating on said shaft is provided for, all,
substantially as described.
5. The combination, of radial arms E and F, rotating with shaft A, and rigid
projecting arms having travellers m, m, with sleeve H having rigid collar j,
provided with cam-groove k rotating freely on shaft A, substantially as described.
Dated this 22nd day of November 1886.