Improvements in and connected with Expansible Bracelets.
Year: 1895

page_text: Date of Application, 14th Oct., 1895
Complete Specification Left, 23rd June, 1896-Accepted, 1st Aug.,
1898
PROVISIONAL SPECIFICATION.
Improvements in and connected with Expansible Bracelets.
We RUDOLF SENNER, Managing Director, and HERMANN DREWS, Manufacturer
both of Pforzheim in the Grand Duchy of Baden, German Empire, do hereby
declare the nature of said invention to be as follows:-
This invention has for its object to so construct bracelets with rigid links that
there is formed a closed annulus but which is expansible so that it can be slipped
over the hand, when it contracts again of itself.
To this end the bracelet is composed of rigid links which are fitted into each
other as in an ordinary chain, and between the opposing sides of the thus engaged
links are interposed small coiled springs which by their tendency to expand, act so as
to bring the links together, whereby the bracelet is contracted.
In the preferred form of this invention the links are provided with projections
and grooves or recesses so as to guide one another on being expanded or contracted.
Moreover, the links are alternately provided with a central partition acting as a
stop for the two adjacent links on being contracted. The said springs are inserted
between the links through holes provided for in the inner walls of the partitioned
links at both sides of said partition, and they are perfectly imprisoned by being
surrounded on all sides by the walls of the respective links.
Dated this 14th day of October 1895.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.
COMTLEIE
Improvements in and connected with Expansible Bracelets.
We, RUDOLF SENNER, Managing Director, and HERMANN DREWS, Manufacturer,
both of Pforzheim, in the Grand Duchy of Baden, German Empire, 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 has for its object to so construct bracelets with rigid links that
there is formed a closed annulus which is expansible so that it can be slipped over
the hand and then contracts again automatically. The rigid links composing the bracelet
are fitted into each other as in an ordinary chain, and between the opposed sides of
the engaged links are interposed springs which by their tendency to expand, act so as
to bring the links together, whereby the bracelet is contracted.
In the preferred form of bracelet constructed according to this invention the
links are provided with projections and grooves or recesses so as to guide one
another on being expanded and on contracting. The alternate links are provided
with a central partition acting as a stop for the two adjacent links on heing
contracted. The said springs are inserted between the links through holes provided.
in the inner walls of the partitioned links at both sides of the said partition, and'
they are securely held in place by being surrounded on all sides by the walls of the
respective links.
On the annexed sheet of drawings Figure 1 is a plan, Figure 1³ a cross section on
the line 1-1 Figure 1, Figure 2a front elevation, and Figure 3 a longitudinal
section of one of the links A, hereinafter called the "main" links:

page_text: Figura 4 is a plan, Figure 4 a cross section on the line 1-1 Figure 4, Figure 5
a front elevation, and Figure 6 a longitudinal section of one of the links B hereinafter
referred to as the "connecting" links.
Figures 7 and 8 show respectively in plan and in front elevation a portion of
a bracelet constructed with the links A and B, part of the middle link B being
broken away in Figure 7.
Figures 9 and 10 are plans of the bracelet respectively in the contracted and in the
expanded state.
As shown in Figures 1 to 3 the main links A are composed each of longitudinal
halves aa which are connected at each end by a cross piece (see Figure 1^) so that
a space a is left. between them. The central part of each of the said cross pieces has
secured to it or formed in one with it a small upright tongue . In the inner or
facing sides of the halves a are formed longitudinal grooves e extemding between
the tongues b.
The connecting links B (Figure 4-6) are bollow and their upper and lower sides
are provided with longitudinal slits e running adjacent to the botton. At each
end and near the bottom each link B is provided with lateral projections e
Within each link B is a central projection or abutment and in the bottom of
the link adjacent to and on each side of this abutment d is a hole. The links B
have such a width, that they can be received by the slits a' of the links A and
slide therein.
When the links A and B are connected to form the bracelet, two adjacent main
links A are engaged with a connecting link B, the link B being placed in the
corresponding portions of the slits a, the tongues of the links A engaged in
the shits e of the links B, and the projections of of the links B, in the grooves c
of the links A. Thus the right hand end of any link B is engaged with the left
hand end of that link A which follows to the right and its left hand end with the
right and end of that link A which follows to The left, and the said two links A
enu be moved towards each other until the tongues projecting through the slits e
into the link B reach the central wall d of the latter.
Through the holes small spiral springs .. are inserted into the links B, so as to be
placed between the end walls of the same and the tongues of the links A, the said
springs tending to hold the links B, closely together as in Figures 7 and 8. As
long as they are allowed to do so, the bracelet is in its contracted state, as
represented in Figure 9. When the bracelet is slipped over the hand the links B
are caused to move apart from each other whereby the bracelet is expanded
shewn in Figure 10, the springs being compressed and when the bracelet.
reaches the wrist the springs re-expand and the bracelet is contracted as shewn
in Figure 9.
The links A and B may be formed and decorated as desired.
Having now particularly described and ascertained the nature of our said invon-
tion and in what manner the same is to be performed, we declare that what wo
claim is
1. In oxpansible bracelets the combination of main hinks such as A and hollow
connecting links such as B, adapted to be placed in the spaces of iwo adjacent
links A, the links being guided upon each other and springs being inserted in the
hollow links B, between their end walls and the connecting pieces of the links A
substantially as herein before described.
$
2. A bracelet made substantially as hereinbefore described and illustrated by the
accompanying drawings.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.