Year: 1888

page_text: Date of Application, 20th June, 1888
Specification Accepted, 20th July, 1888
I, TELEPH PLESNER, of Porsgrund, in the Kingdom of Norway, Manager, 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 grinding machines the object being to provide an emery-
wheel grinding machine for grinding iron and inetal wares, in which the grinding is
effected by a horizontal annular emery-wheel having its grinding surface kept level
by an adjustable diamond attached to the machine.
In order to enable my invention to be fully understood, I will describe how it can
be carried into practice by reference to the accompanying drawing, in which
Figure 1 is a sectional elevation, and
Figure 2 is a plan of a grinding machine constructed according to my invention.
Figure 3 is a detached sectional side view of the diamond holder, and
Figures 4 and 5 are elevations of parts of the machine.
Similar letters in all the figures indicate parts which are similar.
To a vertical shaft or spindle a is keyed an iron disc b provided with an undercut
flange or rim. Upon the dise 6 rests the face of an annular emery wheel c, the lower
part of which is dove-tail shape. The emery-wheel c is secured to the iron disc b by
means of a bevel-edged central-ring d and cement e run in between the dove-tail
shaped part of the emery wheel c and the undercut rim of the iron disc b. The
grinding wheel is arranged in a tub f which serves to hold water and prevent spirting
during the grinding operation. The tub rests on standards g connected together by
a cross-bar g' in the centre of which is a foot step bearing for the spindle or shaft a.
Across the tub and fastened to it is a beam h which can be raised or lowered and
carrying the diamond holder i adapted to be moved along a screw k by operating the
latter by means of a handle 1. The beam his moveable in the apertures m, shown
clearly in figures 4 and 5, and is secured at the required position or height by screw
bolts and nuts n.
In order to avoid the necessity of frequently changing the position of the beam h
the diamond o is fixed to an adjusting screw p working in an eye on the holder, as

page_text: shown in figure 3, and the diamond can by this means be lowered as the face of the
grinding wheel becomes worn.
The improved machine, which is adapted for grinding articles of various kinds,
must for each kind of work be provided with proper fittings, (such, for example, as q)
to suit the particular articles to be ground and which will guide the said articles and
keep them within the area of the grinding surface; if, for example, round articles
are to be ground, the surface should be divided into a number of sections equal to
the number of articles, so that each article shall revolve in its allotted space.
For grinding long articles, the sides of the tub are provided with apertures through
which the articles are introduced.
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 a grinding machine, the arrangement of a horizontal emery wheel in combi-
nation with a diamond placed above the wheel and adapted to be moved in a horizontal
as well as in a vertical direction, so as to level the grinding surface during the
grinding operation.
2. In a grinding machine, such as is claimed in claim 1, the employment of an
emery-wheel consisting of a lower iron disc having an under cut rim which together
with a bevil-edged central ring and a cement-joint serves to secure the emery
wheel.
3. The improved emery-wheel grinding-machine constructed and arranged sub-
stantially as herein before described with reference to the accompanying drawing.
Dated the 20th day of Lunn 1888
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.