Improvements in Apparatus for Holding and Driving Emery Wheels or Discs used for Grinding or Polishing.
Year: 1893

page_text: Date of Application, 30th Nov., 1898-Accepted, 7th Apr., 1894
COMPLETE SPECIFICATION.
Improvements in Apparatus for Holding and Driving Emery Wheels
or Discs used for Grinding or Polishing.
We, THEODOR MIESNER of Karpfenstr 22, and AUGUST PAPE of Moislinger--
Allee 11, both in Lubeck, in the Empire of Germany, Emery Manufacturers, do
hereby declare the nature of this invention and in what manner the same is to be-
perforined, to be particularly described and ascertained in and by the following
statement and accompanying drawing, that is to say :-
The improved apparatus which forms the subject of our present invention has.
for its object the prevention of the danger which the workmen are liable to from.
the breakage and Hying to pieces of the rapidly revolving emery or other grinding-
wheels or discs ordinarily used.
In the accompanying drawing which is in illustration of our invention,
Figure 1 is a section through an emery disc held together by the improved
apparatus, and Figure 2 is a front view of one of the holding plates.
Upon the revolving shaft or axle A a holding disc or plate D is firmly fixed by
means of a key k, whilst a similar holding disc or plate D' is fitted upon the-
shaft A and can be tightened up and held by a nut screwed upon the end of the-
latter as shewn.
These two plates or discs hold between them the emery wheel B which is made-
slightly conical as shewn, in section, its edge being somewhat narrower than its.
centre.
The discs D D' are provided with elastic rings or buffers g gl at their centres and
also with elastic rings ff1 fitting into recesses near the circumference of the discs..
The buffers g and g₁ are made somewhat conical, the openings in the plates B B¹
being made similarly conical to fit them.
When the emery wheel B is held in the manner shewn in the drawing between.
the plates D D', by the arrangement of the buffers g g¹ a perfectly central and
uniform driving and movement of the emery wheel is effected, and by means of the
elastic rings and fan absolutely safe fastening of the latter between the plates is.
obtained.
Moreover by the enclosure of the atmospheric air between the buffers g g¹ and.
the rings ffany external air contact is prevented.
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
The improved apparatus for carrying and driving emery wheels and discs or
other polishing discs of the like kind, with safety, consisting of the two plates or
discs D and D' embracing the grinding wheel or disc B with the intervention of the
elastic buffers g and gl, and the elastic rings fand of as large diameter as conveniently
possible and which press with a uniform pressure against the grinding disc through.
their entire circumference, whilst at the same time the external atmospheric air is.
prevented from coming in contact with the grinding disc between the buffers g gl
and the rings ff, so that the liability to breakage of the grinding disc is reduced
and the danger to the workman from the flying off radially of broken pieces is..
prevented, substantially as described and illustrated.
Dated this 30th day of November 1893.
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicants.