An Improved Watch Case Protector.
Year: 1893

page_text: COMPLETE SPECIFICATION.
An Improved Watch Case Protector.
I, PAUL HUNAEUS, Doctor of Philosophy, of Leinaustrasse, 9, Linden-
Hanover, in the Empire of Germany, Celluloid 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 aud by the following statement :-
This invention relates to an improved cover or protector for watches.
Hitherto such cases have been made of celluloid in two parts, one fitting into the
other so as to form a kind of box or case, the part to cover the back of the
watch being made opaque while the front part or lid has been made transparent in
order to leave the dial of the watch visible. As hitherto constructed these cases
or protectors have the disadvantage that the lid portion in use becomes loose in
consequence of the tendency of celluloid to expand or to retake its original_shape,
and the object of this invention is to obviate this defect and for this purpose I make
one portion of the case as hitherto but I form the edge of the rim of the lid
portion with a kind of flange which, when the two parts are placed over the watch,
springs over the edge of the other portion of the case or protector.
In order to enable the invention to be fully understood I will proceed to describe
the same by reference to the accompanying drawing, in which :-
Figure 1 is an edge or side view, and Figure 2 is a plan of the back portion of
the case or protector :
Figure 3 is an edge or side view and Figure 4 is a plan of the front portion of
the case or protector :
Figure 5 is a vertical section of Figure 3:
Figure 6 is a section on the line 6-6 (Figures 1 and 2) shewing the two parts
of the protector applied together in the position they occupy when closed over a
watch:
Figure 7 is a front view of the protector or case with a watch enclosed.
c is the
a represents the back part of the protector manufactured from celluloid in the
usual manner, and the front or lid portion of the case or protector made from
transparent celluloid, horu or like transparent or translucent material.
inwardly projecting flange which I form on the edge of the rim of the part b.
d and are slots (preferably bayonet slots as shewn) formed in the respective
rims of the parts a and b through which the pendant of the watch passes.
By this construction the watch being placed in the part a, with the pendant,
in the slot d, the rim of the front or lid part is then passed over the rim of the
back part a, the flange c will owing to the elasticity of the material spring over the
edge of the back part a, as clearly shewn in Figure 6, so that the two parts of
the protector will be securely held together and will require a relatively consider-
able amount of pressure to separate them. The two parts having thus been closed
over the watch one part can then he turned on the other so as to bring the ends of
the slots against the pendant of the watch which will thus be securely protected
against the entrance of dust and the like and without the risk of the two parts of
the protector becoming separated with ordinary use.
Although for the purpose of illustration I have shewn the lid portion of my
protector as forming the front part of the case, yet it will be obvious that the lid
may form the back portion of the protector.
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 watch case protector formed in two parts the lid part of which is formed

page_text: of suitable flexible material such as celluloid or horn provided with a flange such
as o adapted to spring over the edge of the other part of the protector substantially
as, and for the purpose, set forth.
2. The manufacture and use of the improved watch case protector hereinbefore
described and illustrated in the several figures of the accompanying drawing.
Dated this 21st day of September 1893.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.