An Improved Machine for Grinding and Polishing Sheet Metal.
Year: 1895

page_text: Date of Application, 16th Feb., 1895-Accepted, 30th Mar., 1895
COMPLETE SPECIFICATION.
An Improved Machine for Grinding and Polishing Sheet Metal.
I, ADOLF SCHMITZ, of 9 Franzstrasse, Berlin, S.O., in the Empire of Germany,
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 a machine for grinding and polishing sheets of any metal,
which enables the sheets to be uniformly and rapidly treated to the end.
This improved machine is represented in the accompanying drawings, wherein
Figure 1 shows a front elevation of the machine,
Figure 2 a transverse section through the machine at a right angle to Figure 1,
Figure 3 a side elevation,
Figure 4 a horizontal section, and
Figure 5 a plan.
The support for the sheet metal to be treated consists of an arched steel plate b
guided laterally in the frame a of the machine and pressed upwards by springs c.
On the two sides of the support b I arrange rollers i, for transporting the
sheets (Figure 2), each of the upper rollers i being driven by a belt pulley o with
the aid of toothed wheels k, l, m, n or other transmitting gear. Each lower
transporting roller p is adapted to slide with its lateral journals vertically in the
frame a and bears upon the inner arms of weighted levers which press it against
the upper rollerior against the sheet metal to be treated. In its turning movement
the driven roller i actuates the roiler p by toothed wheels s, 3.
The grinding or polishing roller not shown arranged above the support b, and
carrying felt discs or the like which are clamped in the well-known manner between
discs by means of a nut g, is set in rapid rotation by the small driving pulley h.
This roller is removably supported in the frame t carried by the rods u³ of the
frame u which are parallel to the polishing roller.
On its two sides the frame t has journals t' to which the connecting rods vare
attached. The other ends of these connecting rods are attached to the pins w¹ on
cranks w driven by the belt pulley o by means of toothed bevel wheels x, y, so that
in the operation of the machine the frame t will slide to and fro upon the rods u¹
parallel to the polishing roller. Accordingly the polishing roller is not only
rotated but also moved in the longitudinal direction over the sheet metal to be
treated.
The frame u carrying the rods u' is guided vertically on the frame a and can be
displaced by means of screws z provided with hard wheels z' so that as the brushes
discs or the like on the polishing roller become worn this roller may be re-adjusted.
By reason of the automatic double movement of the grinding and polishing
roller the machine operates rapidly and well. The transporting rollers i, p keep
the sheets of metal clamped and enable them to be treated to the extreme edge.
The spring support b yields when the pressure of the polishing roller becomes too
great, while the arched form of this support ensures a beautiful and intense polish
which is uniform throughout.
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 :-
First A machine for grinding and nalishino sheet metal comprising an arched

page_text: support 6 which exerts an elastic pressure against the grinding and polishing roller
and over which the sheet metal to be treated is guided by transporting rollers
and p arranged in front and at the rear of the said support.
Second. A machine for grinding and polishing sheet metal, in which a grinding
and polishing roller adapted to be adjusted relatively to the support is moved to t
and fro in the direction of its axis during the rotation, the rapidity of its movement
being dependent on the rapidity of rotation of the transporting rollers.
Dated this 16th day of February 1895.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.