IMPROVEMENTS IN WATCHES
Year: 1885

page_text: I GEDEON THOMMEN of Waldenburg near Basel Switzerland do hereby declare
the nature of said invention for IMPROVEMENTS IN WATCHES" and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
My Invention has for its object to provide means for securely attaching the rings
loops or bows of watches to the stems or pendants in cases where it is impossible
to fix the ring loop or bow in the usual manner that is to say by means of a screw
or pin which passes transversely through the stem or pendant and the ends of the
ring loop or bow. In cases where an operating part passes through the stem such
as in keyless watches this method of attaching the ring or bow cannot be employed
and the said ring or bow has hitherto been kept fast only by virtue of the elasticity
of the ring or bow itself.
In order to remove the objections to this mode of attachment I have invented a
new means of fixing the rings or bows to the stems or pendents of such watches
and I will describe it with reference to the accompanying drawings whereon
Figure 1 shews a part of a watch case to the stem or pendent of which the ring is
fixed according to my Invention.
Figures 2 and 3 represent an instrument by which the fixing of the ring can be
readily performed.
°
Both the ends of the ring a are first provided with threaded holes as is usually
done with the rings of watches and also with annular projections which fit into
corresponding openings in the stem .b. The ring is put on the said stem and is
fixed thereon by the two screws c c which are introduced from the inside of the
pendant by means of the instrument represented in figures 2 and 3.
This instrument engaging in the pendant is composed of four small wheels ff¹
ff which gear into each other and are placed in the same line between two
plates & and e The wheel which is the last of these wheels from the end of the
plates is provided with a square hole into which fits a correspondingly shaped rod
of the tool g serving to impart motion. By means of the two intermediate
wheels f and f' this motion is transmitted from the wheelf to the wheel f³ and
from thence to the screw c the head of which is for this purpose provided with two
holes into which fit corresponding pins h h on the wheel f³.

page_text: In setting a ring upon the pendant the former is pushed over the latter holding
fast thereon by its elasticity then the ring is fixed in the vice so as to have the
hole of the pendant opposite the operator who placing a screw c upon the two
pins h of the wheel f³ introduces this screw into the pendant by means of the said
instrument. In turning the tool g the wheels transmit motion to the screw c
which is thus screwed into the threaded holes of the ring a.
The same operation is repeated for putting in the second screw c.
By unscrewing the screws o of the ring a in order to readily insert the two
pins h of the wheel f³ into the holes of the screw-head the latter is provided with
a central pin projecting a little more than the pins h of the wheel f³ figures 1
and 3. In consequence of this the pin is easily found with the conical central hole
of the wheel f³ and by rotating the tool g in the reverse direction to that for
engaging the screws the pins h engaging with the holes in the screw head and
easily screw out the screw c.
41.7
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
1. The mode of fixing the Hng loop or bow to a hollow pendant or stem of a
watch by means of screws screwed into the ring loop or bow from inside the
pendant or stem substantially as hereinbefore described and represented in Figure 1
of the annexed drawing.
2. The instrument for introducing the securing screws into and rotating them
from the interior of a hollow pendant or stem substantially as hereinbefore
described and represented by the figures 2 and 3 of the annexed drawing.
"
Daven Cuts on day of 1000.
J. HENRY JOHNSON,
47, Lincoln's Inn Fields, London,
Agent for the said Gédéon Tominen.