Improvement in Protecting Cases for Watches.
Year: 1894

page_text: Date of Application, 30th Aug., 1894-Accepted, 13th Oct., 1894
COMPLETE SPECIFICATION.
Improvement in Protecting Cases for Watches.
I, HEINRICH KLEIN, Manufacturer, of Mülheim on the Rhine, in the Province
of Rhineland and Kingdom of Prussia 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 :-
Instead of from metal as formerly the protecting cases for watches have lately
frequently been made from celluloid, the reason being that this material, when of
sufficient thickness, is very elastic, of a moderate price and besides permits of that
part of the case which covers the face being made transparent, so that the owner
of a watch, provided with such a case, can recognise the position of the hands on
the face without first having to open the case.
On
These celluloid cases always consist of two equal bowl-shaped parts, the rims
of which close over each other and are each provided with a small slit-shaped
aperture, into which the neck of the watch-ring fits when the case is shut.
account of this it was not possible to turn one bowl of the case about the other
when the watch was enclosed, as the neck of the watch prevented it, and always
held the two bowls in the same position by means of the slits in their rims.
Any turning of the two parts was also frequently prevented by the heights and
hollows in the rim of the bowls, which fitted into each other and helped to give
the two halves of the case a better hold on each other.
My idea is to construct these cases in such a manner that they consist of two
unequal parts, the actual bowl of the case and of a cover which can turn on it.
The case is represented in the accompanying drawing,
Fig. 1 giving an exterior view of the movable cover A,
Fig. 2 a section through the case when it is closed, with the neck h of the
watch-ring in section, and
Fig. 3 an inner view of the bowl B of the case, on which the movable cover A
is placed.
The bowl B of the case consists of a hollow bottom b and a cylindrical part m,
which by being bent outwards or being thickened at the upper rim, has received a
marginal ring projecting slightly laterally. In one part of the cylindrical
part m there is provided a slit-shaped recess s for the reception of the neck of the
watch. The cover A is hollowed out just like the bottom of the piece B and
has a narrow marginal ring r, bent slightly inwards. The latter is of such a size
that it encloses the margin of the piece B with a certain amount of elastic force,
but does not reach as far down as the neck lying in the slit s, so that the part A
is held fast on the part B, but so as to be able to revolve, by the two marginal
parts and r¹ which catch into each other.
If by painting, stamping, printing, pressing, engraving or by the sticking on of a
piece of another material e.g. metal, a mark-either as in the drawing an arrow P-
or a hand, a dot, a circle, a knob, a hole or the like, is placed on the cover A,
which is made of a transparent material, it becomes possible, by turning the
part A on the part B, to cause the mark to point to a particular number on the face
of the watch. Thus by turning this mark it can be successively made to point to
all the numbers and subdivisions on the face of the watch, thereby affording
a kind of marking arrangement which permits of registering the number of glasses
of beer that one has drunk, or the points scored in a game of billiards and similar
things.

page_text: 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 :
Improvement in celluloid protective cases for watches, distinguished by the
movable arrangement of the cover A on the case B, the latter containing the
entire watch and allowing the neck h of the watch to enter into a slit s in the rim,
intended for it, and by the arrangement of a mark of any shape on the disk of the
cover A, which is made of a transparent material.
Dated this Eighteenth day of August 1894.
ICATתזוIITAI
TT TAT
For HEINRICH KLEI
B. Brockhues.