Circular File or Rasp.
Year: 1891

page_text: Circular File or Rasp.
We FRANCES SOPHIA METZ and GEORGE CHARLES JULES MAGDELIN
of 49 Tabernacle Street London E.C. Umbrella and Parasol Stick and Cane
Manufacturers 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 :-
The object of this invention is to provide a circular file or rasp for filing rasping
or smoothing rounded surfaces such for instance as those of umbrella sticks or
canes.
The file or rasp is composed of small circular saws of different sizes which are
put together in the following manner. We take a shaft or spindle preferably of
steel and preferably cylindrical in shape which is furnished with a small collar or
flange upon which we lay a circular plate, having a hole in the centre thereof
which is passed over the shaft or spindle. Upon this plate we lay in the following
manner a number of circular saws made according to the description thereof
hereinafter contained. Upon the circular plate we lay a circular saw having a
diameter slightly smaller than that of the circular plate. Upon this circular saw
we lay a 2nd circular saw having a diameter slightly smaller than that of the 1st.
Upon this 2nd circular saw we lay a 3rd having a diameter slightly smaller than
that of the 2nd and so on until the smallest circular saw is reached. Upon this we
lay another circular saw having a diameter equal to that of the circular saw
immediately below the smallest. And upon that last saw we lay another having a
diameter equal to that of the saw next but one below the smallest and so on until
the last saw is placed which should have a diameter equal to that of the saw first
placed in position upon the circular plate before referred to. Upon the last saw
we place another circular plate equal in size to that upon which the saws are
placed and the whole are then tightly screwed together by an ordinary nut and
washer or are firmly fixed together in any other suitable manner.
Circular plates may be inserted between the saws or some of them for the
purpose of adjusting the size of the file or rasp to the size of the surface upon
which it is proposed to operate. In such case the diameter of the circular plates so
inserted must be smaller than each of the diameters of the saws between which it is
inserted, so that the edge of the plate so inserted shall not project so far as the
teeth of the saws.
The size of the file or rasp may be varied at pleasure by varying the size and
number of the saws and plates of which it is composed.
The circular saws may be made of any suitable material and may be such as are
commonly in use but we prefer to have them of steel and to make the teeth of
somewhat less curvature than is ordinarily the case and so that they appear more
nearly to radiate from the centre of the saw.
The file or rasp may be attached in any suitable manner to a lathe or other
machinery.
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. The combination of circular saws with or without circular plates substantially
as hereinbefore described.
1
1 3

page_text: 3. The application of such file or rasp or of such combination as is before
described to the filing rasping or smoothing of carved or 'hooked handles of
umbrella or parasol canes.
GEORGE CHARLES JULES MAGDELIN.
FRANCES SOPHIA 'METZ.