Year: 1889

page_text: We, JOHN ROTHERHAM of Spon Street, Coventry, Watch Manufacturer, WILLIAM
JOHNSON of 27 Spon Street, Coventry Warwickshire, Mechanic, and EDWARD
THOMAS LOSEBY Horologist of 45 New Walk, Leicester, Leicestershire, 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 my invention relates to certain new and useful improvements in the method of
attaching rings or bows, handles or loops to watch cases, pendants, lockets, knobs or
studs of any kind.
Hitherto no adequate provision has been made to guard against the ring or bow of
a watch being forcibly twisted or wrenched off and the watch thereby detached from
the chain, or from the knobs, studs or other articles to which said rings or bows may be
attached.
My said invention may be described as follows, reference being had to the
accompanying drawings and the figures and letters of reference marked thereon,
similar letters indicating like parts throughout
--
Fig. 1 is a sectional elevation of our invention. Figs. 2 and 3 are sectional elevations
of modified forms of our invention.
In the drawings A represents that part of a watch case known as the knob in which
the ring is retained.
The ring or loop is severed as shown and has formed upon its two ends right
handed and left handed screw threads b b which engage with the female threads
formed in the sides of the knob for their reception.
It will be readily understood that the ring or bow B is screwed into the knob A
before it is fitted to the watch case. It will also be evident that when once the ring or
bow has been screwed into the knob or stud, and the knob or stud fixed to the watch
case, the ring or bow will be capable of making one half turn only, thus rendering it
impossible to detach it in any way except by stripping the threads which would
require great force.

page_text: If preferred however we may screw one end of the ring or bow only, as shown in
Fig. 2, the other end being simply pivoted as indicated at 6 and maintained in
position by the tension of the ring.
In Fig. 3 we have shown both ends of the bow or ring pivoted in the knob or stud,
and in this case the pivots which enter the knob are left of unusual length and are set
in the same plane.
The necessary tension for securing the ring is obtained by a twist or pressure applied
to the bow in such a manner as to change its form in a slight degree, thereby causing
the spring or tension of the ring to tend to the closing together of the open ends, and
thus to cause a sufficiently deep inter section of the ring or bow into the knob to
render its detachment impossible without great force being applied.
Our invention is also equally applicable to pendants, lockets, knobs, studs and for
similar purposes, being a ready and secure means of attaching rings to the same.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The herein described ring or bow consisting of a nearly complete circle the two ends
being adapted to enter the knob of a watch case or to be similarly attached to
pendants, lockets and knobs or studs of any kind, substantially as and for the purposes
herein before described, set forth and illustrated in the drawings hereunto annexed.
Dated this 15th day of January 1889.