An Improved Machine for Polishing or Surfacing Wood or other Material.
Year: 1894

page_text: Date of Application, 15th June, 1894-Accepted, 21st July, 1894
CUMI LEIM
DIECINICATION.
An Improved Machine for Polishing or Surfacing Wood or other
Material.
We, THE AKTIENGESELLSCHAFT MASCHINENFABRIK, of Landsberg a Lech,.
Germany, and FREDERIC KÜHN, of 66 Basinghall Street, London E.C., General
Merchant, do hereby declare the nature of our said invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
The object of our invention is to manufacture improved machines for polishing
or surfacing wood or other material.
And in order that our said invention may be particularly described and ascer-
tained, reference is hereby made to the accompanying drawings, in which similar
figures of reference indicate corresponding parts.
Fig. 1 is a perspective view of the machine and Fig. 2 is a section of the
polishing disc with its guiding case.
3 is the frame of the machine, which is fixed to a wall, as shown. 4 is a spindle-
working in the bearings 5, 5, and capable also of rising and falling a short distance..
The upper end of the spindle 4 revolves in a block to which a pin 6 is fitted..
This pin enters slots at the forked end of the lever 7, the lever being pivoted at 8,.
and fitted at the opposite end with a weight 9, whereby the spindle, with its-
attachments, is counterbalanced. 10 is a fast pulley and 11 a loose pulley, fitted
to the spindle 4. 12 is a driving belt, and 13 is the belt fork, actuated by
means of the lever 14 and rod 15. 16 is a pendulous shaft, connected with the-
spindle 4 by a cup and ball or other form of universal joint at 17, whereby it
is driven at the same speed as the spindle 4. The lower end at 18 is similarly
connected, by a ball and socket or other universal joint to the disc and pad
herein after described. 19 is intended to represent a piece of wood in position
for being operated upon, resting on a table 20. 21 is a case containing an
exhaust-fan, or equivalent apparatus driven by friction gear 22 and 23; 22 being
a driving pulley, fast on the spindle 4, and 23 being the driven pulley, fast on the
spindle of the exhaust apparatus 21. 24 is a tube connected at its upper end with.
the exhaust apparatus 21, and at its lower end with the case of the pad 26.
25 is a.
tube through which the fan 21 drives the dust which rises through the tube 24,.
to be carried away from the workshop.
Referring to Fig. 2, the case 26 is shown fitted with two handles 27, whereby the
case is held in position and moved about, as required. 28 is a plate attached to
the spindle or shaft 16 by the universal joint 18: the plate revolving indepen-
dently of the case 26. 29 is a pad fixed to the plate 28. To this pad sand paper,
glass paper, emery paper or cloth, is attached, the operator supplying the necessary
pressure by means of the handles 27. The case 26 is provided with channels 30,.
through which all the dust or powder is drawn through the tube 24, by the suction
of the apparatus 21.
Our invention may be modified in its construction and details; for instance, the
framing may be constructed for attachment to horizontal timbers, or it may be
constructed to stand by itself. Also the shaft or spindle 4 may be driven by a
horizontal shaft and bevel gearing. Also the tube 24 may be telescopic (as shown).
or formed of flexible material. Also the exhaust apparatus may be at a distance
from the machine, and a flexible or other tube may be arranged to communicate
therewith in any convenient manner.
The weight 9 is adjusted upon the lever 7 so as to lift the apparatus off the work
when the workman ceases to hold down the case.
The method of using the apparatus is as follows:-The workman secures the

page_text: piece of wood 19 to the table 20, by means of clamps, or otherwise; then, seizing
the handles 27 in both hands, he applies the revolving pad and sand or other paper
to the wood to be polished, moving it about the surface until it is perfectly smooth.
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 :-
1. In a machine for polishing or surfacing wood or other material, the combination
therewith of an adjustable shaft, fitted at each end with universal joints or their
equivalents; such shaft being driven by suitable driving gear attached to. its
upper end, and the lower end of the shaft being attached to a plate and pad
carrying sand paper or the like, substantially as herein before described and illus-
trated by the drawings.
2. In a machine for the purposes aforesaid, the method of counteracting the
weight of the shaft 16 with its appendages by means of a weighted lever 7
substantially as herein before described and illustrated by the drawings.
3. In a machine for the purposes aforesaid, the combination therewith of the
case 26, having handles 27, a revolving plate 28 driven by the shaft 16 and carrying
a pad 29 and sand paper or the like; the case being connected with a suitable
exhausting appliance by means of a flexible or other tube, for the purpose of
carrying away the dust or powder, substantially as herein before described and
illustrated by the drawings.
4. The general construction, arrangement, and combination of the several and
respective parts, together forming our invention of an improved machine for
polishing or surfacing wood or other material, substantially as herein before
described and illustrated by the drawings.
Dated 12th June 1894.
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent.