Improvements in Phonograph Cylinders.
Year: 1899

page_text: Improvements in Phonograph Cylinders.
We, VOLKMAR BRÜCKNER and WALTER BRUCKNER, both of Bahnhofbrücke, 5,
Zurich, in the Republic of Switzerland, both Engineers, do hereby declare the
nature of this invention to be as folows:-
This invention relates to an improved cylinder for phonographs and is for
the purpose of allowing the alteration in diameter of the same so that for one
and the same apparatus large and small cylinders as desired can be used. By
this means the same apparatus can be used with funnel sound distributors and
also with ear tubes using for the former the enlarged and for the latter purpose
the diminished cylinders.
For this purpose it was necessary hitherto, to use several exchangeable
cylinders of different diameter or to arrange such different cylinders on a movable
frame, which necessitated considerable cost as the large cylinders are especially
dear.
In order to avoid this disadvantage and to obtain the desired purpose, in
the present invention only one cylinder is used which can be made into a larger
diameter if required as over the ordinary small phonographic cylinder which
can be cylindrical or conical and of one or more pieces, one or more larger
hollow cylinders are placed whose circumferential face is suitable for receiving
the sound waves, thus enlarging the diameter of the cylinder in a suitable
manner.
By this means it is possible with one and the same apparatus and only one
cylinder, to make use of large and small cylinder diameters without being
compelled to provide different cyinders by simply pushing on the small cylinder
one or more hollow cylinders thus enlarging the diameter for using the apparatus
with funnel-shaped sound distributors, and removing them from the small
cylinder, for using the apparatus with ear tubes. Naturally both cylinder
diameters could be used for one or the other manner of using the phonograph.
The membrane-lever must be constructed so that it can be altered according
to the diameter of the cylinder.
The hollow cylinder can be of suitable material, but its surface must be suit-
able for receiving the sound waves.
Dated this 30th day of August 1800
HERBERT HADDAN & Co.,
Agents to Applicant.
Improvements in Phonograph Cylinders.
We, VOLKMAR BRÜCKNER and WALTER BRUCKNER, both formerly of Bahnhof-
brücke 5, now of Unterer Mühlesteg, Zurich, in Switzerland, Engineers, do
Price 8d.]

page_text: 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 follow-
ing statement:
The present invention relates to devices for holding record cylinders for
phonographic purposes, the said cylinders being of variable diameter, so that it
is possible to use with the present phonographic apparatus, either trumpet
shaped sound distributors, or ear tubes, for the former purpose an enlarged
record cylinder for the latter purpose a reduced record cylinder being used.
wax
The improvements in such devices or carriers consist in the construction and
use of an outer carrier cylinder or mandrel, to be placed upon or over the usual
metal record carrier or mandrel which carries the present hollow wax cylinder
records, and which receive the sound waves, to be used and employed as a second
or outer mandrel of larger diameter over which a suitable sized, hollow
record cylinder is placed, when the apparatus is to be used in connection with
the trumpet sound distributors; and when this larger or outer mandrel is
removed a smaller wax record cylinder is drawn over the remaining smaller
mandrel, and the latter or smaller record cylinder is ready for use with the
apparatus in connection with ear tubes.
With these improvements it is, therefore, not necessary to have two separate
apparatus for use, one with trumpet distributors and one with ear tubes, but
only one apparatus; a record cylinder of larger or smaller diameter being used at
will. Of course the membrane lever and needle must be arranged in such a
manner that it can be adjusted acording to the diameter of the cylinder. In
carrying out the invention, the inner metal mandrel can have any shape and
may be conical, and consist of one or more parts and the outer metal mandrel
to be placed thereon can be connected with the inner mandrel in any suitable
manner.
The annexed drawing represents an example of the improvements.
Fig. 1 being a partial longitudinal section, and
Fig. 2 a cross section, with the outer mandrel for the larger record cylinder
in place; a indicates the small mandrel, from which the wax record cylinder has
been removed; b is the larger mandrel pushed over the other one.
For use a
wax record cylinder has to be drawn over b. It will easily be understood that
in order to use a smaller cylinder the larger metal mandrel b must be removed,
whereupon a wax record cylinder is drawn over the smaller metal mandrel a.
To use the larger record cylinder the smaller wax record cylinder must first be
removed from the mandrel a, the larger mandrel b then placed upon the smaller
one a, and a wax record cylinder then drawn over b. c is a flanged collar fitted
with studs d for insertion into corresponding indents in the outer mandrel b,
to keep same in place.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is-
Improvements in record cylinder carriers cylinders or mandrels for phono-
graphic apparatus, consisting of the combination with a mandrel or carrier a,
for receiving a wax record cylinder to be drawn over it when the apparatus is
used in connection with ear tubes, of a larger removable mandrel or carrier b
to be drawn over the mandrel a, and provided with a suitable larger wax record
cylinder when the same apparatus is to be used in connection with trumpet sound
distributors.
1000