Improvements in Musical Boxes.
Year: 1892

page_text: Date of Application, 3rd Nov., 1892-Accepted, 31st Dec., 1892
COMPLETE SPECIFICATION.
Improvements in Musical Boxes.
I, PAUL LOCHMANN of Leipzig-Gohlis in the German Empire, Manufacturer,
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:-
This invention relates to musical boxes of the kind that are furnished with
interchangeable note discs or sheets. The object of the invention is firstly, to
drive the note disc not direct from the driving mechanism but through an
intermediate organ, and secondly, so to arrange the driving mechanism of the
musical box that it may at any time and independently of the playing
mechanism be removed from, and replaced in the box or changed for another
driving mechanism. By the employment, for driving the note disc, of an
intermediate organ in the form of a second disc laid upon the note disc and
which is engaged by the driving mechanism, the advantage is gained that the
note discs have no longer to be specially constructed to be driven or engaged
direct by the driving mechanism, as has hitherto been the case with note discs
driven at their periphery, for which purpose they have to be provided with
teeth or holes or other means of engagement. A further important advantage
obtained is that by laying a disc on the note disc so as to cover this latter all
disturbing noise caused by the passage of the note disc over the playing
mechanism is suppressed and only a perfectly clear tone produced. In musical
boxes of this kind the driving mechanism is usually fixed underneath the plate
on which the playing mechanism is located or in such other place that
considerable manipulation, with the use of tools, is necessary for the removal
of the same, so that it is often impossible for an inexperienced person to do
this when repairs are required. In the construction of this invention, the
driving mechanism is so arranged in the box that it may readily be removed
therefrom and with like ease replaced, or in the case of repairs requiring a
length of time may be exchanged for another works.
In the accompanying drawing
Fig. 1 is a plan view of an open musical box with the invention applied thereto
and
Fig. 2 is a sectional view of so much of the instrument as is necessary for
the purpose of explanation.
A is a disc laid on and covering note disc B. At its circumference it is
provided with perforations or teeth in which driving wheel R of driving
mechanism T engages. Disc A is held and carried on the same spindle as the
note disc by means of stud C so that when disc A is set in rotation by driving
wheel R from driving mechanism T, the note disc B is carried with it. By
reason of disc A being laid upon note disc B the latter is covered, and thereby
all disturbing noise attendant upon the rotation of the note disc over the playing
mechanism is suppressed, giving for result a perfectly clear tone.
The driving mechanism T is located in a case G held against a side of the
musical box either by screws, or as preferred, by a frame F into and out of which
it may be slid, the frame being fixed to the side of the box as shewn in the drawing.
When it is necessary to repair the driving mechanism any inexperienced person
may remove it from the box simply by sliding the case containing it out of frame F
and may replace it with similar ease. As driving mechanisms of the same
dimensions may be made perfectly alike, when much repairing is required, another
driving mechanism may be introduced in the place of the one out of repair

page_text: without labour or tools being required, an important advantage for the musical
box export trade.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim, is-
1. A musical box in which a second disc A is laid on the note disc B covering
this latter and held fixed with the same by stud C so that disc A upon being
rotated by the driving mechanism engaging its circumference, carries the note disc
with it, for the purpose of doing away with the direct driving of the note disc and
for the suppression of the bye noise of working, substantially as described and
shewn.
2. A musical box in which the driving mechanism T is made readily removable
therefrom and interchangeable by locating it in a frame F in which it may be slid,
or by otherwise attaching it to a side of the musical box, substantially as described
and shewn.
Dated this 3rd day of November 1892.
CAPITAINE & VON HERTLING,
89, Chancery Lane, London, W.C., Agents for the Applicant.