Improvements in Grinding and Polishing Machinery.
Year: 1898

page_text: Date of Application, 25th Aug., 1898
Complete Specification Left, 20th May, 1899-Accepted, 8th July, 1899
Improvements in Grinding and Polishing Machinery.
I, FRANZ HENDRICHS, of Ferguslie Works, Paisley, in the County of Renfrew,
North Britain, Engineer, do hereby declare the nature of this invention to be as
follows, that is to say:
-
My said invention has for its object to improve the construction of grinding
or polishing machinery so that such machinery will grind or polish a large variety
of articles which have hitherto only been capable of being ground by hand, highly
skilled labor having been required to produce satisfactory results.
In carrying out my invention, according to one modification, there are two
grinding or polishing wheels each fixed on one end of a horizontal shaft extending
across near the top of the framing and so pivotted or journalled at their opposite
ends that they can swivel in a horizontal direction, the bearings at the end next
the grinding wheels being constructed as slides movable more or less apart to
permit of this movement. The horizontal shafts carrying the grinding wheels are
driven by an endless rope passing from a pulley on a first-motion shaft up to
and over a pulley on each of the shafts, this rope also passing round a tension
pulley which can be weighted to cause the grinding wheels to bear with any
desired pressure on any article inserted between the wheels. The driving rope
arranged as described tends to draw the upper shafts together and to thereby press
the grinding wheels towards each other with pressure due to the weight on the
tension pulley. The article to be ground or polished is held in a holding piece
hereinafter described and which can be moved horizontally on a rest carried on
the upper end of a vertical shaft extending up at the outer side of the grinding
wheels so that the article can be inserted horizontally between the wheels. This
horizontal motion is effected by gearing from the first motion shaft actuating a
cam which bears on a lever the upper end of which is connected to the holding
piece so that on the movement of the cam the holding piece is moved to insert
the article horizontally between the wheels, a spring moving the lever back again.
Provision is also made for giving a vertical movement to the article to be ground
when a flat surface is wanted. This vertical motion is effected by a second cam
also driven from the first-motion shaft and acting on levers which are connected
to the vertical shaft carrying the slide rest so that on the movement of the cam
that shaft moves up and down in its bearings.
According to a second modification the swivel bearings holding the ends of
the horizontal shafts may be replaced by sliding bearings such as are used at
the other ends of the shafts; and in this case grinding or polishing wheels may
be fixed on both ends of the shafts.
The holding piece hereinbefore referred to has centered on it two levers, one
of the levers having two arms through one of which arms a handled spindle is
screwed and bears on the other lever. When the screwed spindle is turned it
causes one lever to first grip the article to be held between it and a flange on
the holding piece and on the continued screwing of the spindle the other lever

page_text: then also grips the article. The levers will thus adapt themselves to the shape
of the article. On releasing the screwed spindle springs bring back the levers to
their first positions.
Dated this Twenty-fourth day of August 1898.
EDMUND HUNT,
Applicant's Agent.
Improvements in Grinding and Polishing Machinery.
I, FRANZ HENDRicis, of Ferguslie Works, Paisley, in the County of Renfrew,
North Britain, Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement, that is to say:-
My said invention has for its object to improve the construction of grinding
and polishing machinery so that such machinery will grind or polish a large
variety of articles which have hitherto only been capable of being ground or
polished by hand, highly skilled labor having been required to produce satisfactory
results.
In carrying out my invention according to one modification there are two
grinding or polishing wheels on short parallel horizontal shafts arranged so as to be
movable towards and from each other at the upper part of the framing. The
shafts are driven by an endless rope or belt passing round pulleys on the shafts,
the rope or belt being guided and driven so as by its tension to draw the shafts
with their grinding or polishing wheels towards each other so as to bear with
the desired pressure on an article presented between them. The article to be
operated on is held in a holder which is guided and is movable by hand to enter
the article between the wheels and to move it so that the action may take effect
on more or less of the article as may be required.
The shafts of the grinding or polishing wheels may be carried in bearings in
sliding or swivelling blocks so that the wheels may be movable towards each
other; I however now prefer to have the shafts with their wheels carried by
swinging frames whereby the desired movements are obtained in a convenient
way.
And in order that my said invention and the manner of performing the same
may be properly understood I hereunto append a sheet of explanatory drawings
to be hereinafter referred to and showing one modification of my improved
machinery.
Figure, 1, on the accompanying sheet of drawings is a front elevation, and
Figure, 2, a vertical section as at right angles to Figure, 1, of a simple modifica-
tion of my improved machinery. In these drawings the same reference letters and
numerals are used to mark the same or like parts wherever they are repeated.
As shown in the drawings there are two grinding or polishing wheels, A1, A2,
each fixed on a horizontal shaft, A3, A4. These shafts are each carried in
bearings in swinging frames consisting each of a pair of levers, A 5, A 6, hanging
from horizontal shafts, A7, A8, on the top of the framing, A9, of the machine
so that the grinding wheels, A1, A2, can move more or less apart. The
horizontal shafts, A3, A4, carrying the grinding wheels, are driven by an endless
rope, B, passing from a pulley, B1, on a first-motion shaft, B2, up to and round
pulleys, B3, B4, on the horizontal shafts, A3, A4, this rope, B, also passing
over tension pulleys, B5, B6, which are carried on one end of a lever, B7,
centered at B8, the outer end of this lever having a weight, B9, attached to it.

page_text: The driving rope, B, arranged as described tends to draw the grinding wheels,
A1, A2, towards each other with a pressure depending on the weight attached
to the lever, B7, carrying the tension pulleys, B5, B6, so that the grinding
wheels will bear with any desired pressure on any article inserted between them.
The hanging levers, A5, A6, are connected by levers, C1, C2, to a bar, C3,
which can slide vertically on the framing, A 9, so that the grinding wheels, A 1, A 2,
will travel equally apart when an object is inserted between them. The sliding
bar, C3, may have a weight attached to it either in addition to or instead of the
weight, B9, attached to the lever, B7, carrying the tension pulleys, B5, B6,
for the purpose of effecting the desired pressure between the grinding wheels,
A 1 A 2.
The article to be ground or polished is held in a holding piece or vice, D,
(Figure, 2) which is made with a handle, 1 1, and which can be moved horizontally
on a rest, 12, carried on the upper end of a vertical shaft, 13, extending up
at the outer side of the grinding wheels, A1, A2, so that the article can be
inserted horizontally between the wheels.
Provision is also made for grinding and polishing flat surfaces by giving to
the shaft, D3, a vertical motion through levers, D4, D5, operated by a foot
treadle (not shown) attached to the lever, D5, Figure, 1.
Both the horizontal and vertical motions herein before described may be effected
through cams, levers or gearing actuated from the first motion shaft.
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 grinding and polishing machinery, a pair of grinding or polishing wheels
on horizontal shafts arranged to be pressed towards and movable from each other
the shafts being driven from a pulley on a first motion shaft by an endless rope
or belt passing round pulleys on the shafts and over weighted tension pulleys
the parts being combined and operating substantially as and for the purposes
herein before described.
2. In combination with a pair of grinding and polishing wheels, a holding
piece or vice capable of moving horizontally on a rest carried on the upper end
of a shaft to which vertical motion can be imparted substantially as and for the
purposes hereinbefore described.
Dated this Nineteenth day of May 1899.
EDMUND HUNI,
Applicant's Agent.