Year: 1887

page_text: Date of Application, 9th Apr., 1887
Complete Left, 12th Dec., 1887
Complete Accepted, 13th Jan., 1888
I, HERMANN DREWS of Pforzheim in the Grandduchy of Baden, German Empire,
Jeweller, do hereby declare the nature of this invention to be as follows :-
The improvements described hereinafter relate to self-closing bracelets, napkin- and
other rings the construction of which is based on the principles of the "Nuremberg-
Scissors." This construction consists therein that always two flat levers or bars are
laid crossway one upon the other and are pivoted together. These two levers having
four free ends are loosely connected with two other like pairs of levers and these
again with other pairs and so forth. As all the joints are movable the whole system
of levers can be drawn out nearly as long as the length of all the levers and can be
drawn in so that all the bars are close together. The object of these improvements is
to keep the bars of the Nuremberg scissors continually drawn together by means of
a (spiral) spring placed between them and thus to form an elastic ring always drawn
together. The bracelets, napkin-rings etc. hitherto constructed after the system of
the Nuremberg scissors have all the one drawback, namely that the ring does not
remain closed. Owing to the pressure operating on the inside (of the ring) all such
rings open of themselves but do not close automatically. The improvement in the
present invention consists in using a (spiral) spring the ends of which operate on the
crossed arms of the article and keep the ring closed fast round the object it
encircles.
Owing to the effect that this spring has on the arms of articles made after the
system of the Nuremberg scissors, an elastic, self-contracting ring is thus formed.
The two bars of an article made after the above named system can be each provided
at their crossing-point with a small box. These boxes catch in each other and are
connected hinge-like by means of a wire pin. Each of the boxes is fastened to a bar
and there is a common spring for both bars. One end of this spring passes through
the one box into the one bar, and the other end of the spring goes through the crossing
arm, so that the spring draws the arms together.
A spiral-shaped spring may also be used in the place of the spiral-shaped screw-
spring. One end of this spring is fastened to the upper box on the arm and the other
! Prine R71

page_text: end is secured to the lower box, so that the arms to which the boxes are fastened, are
drawn together. The two boxes are connected hinge-like in this case also by a common
wire-pin.
Another modification consists in making the ends of the spring operate on the
ends of the bars instead of on the middle of them. In this arrangement the ends of
two crossing arms are each provided with a box. These boxes are combined with each
other and more longitudinally against each other. The two boxes and consequently
the ends of the two arms (of the article, etc.) are pressed asunder by a (spiral) spring
placed between them, and in this way the arms which are connected hinge-like in the
middle are brought close together.
By means of the construction just described an exceedingly elastic and self-con-
tracting ring is formed which can be drawn asunder in the simplest and easiest
manner.
A bracelet or napkin-ring constructed in this way clasps the article, round which it
is put closely and elastically.
The arrangements just described are well adapted for all articles of annular shape
which are constructed on the system of the Nuremberg scissors.
These arrangements are to be used in preference on bracelets and napkin-rings.
Dated this 3rd day of August. 1887.

page_text: D
COMPLETE SPECIFICATION.
Improvements in Self-closing Bracelets, Napkin and other Rings
I, HERMANN DREWS of Pforzheim in the Grandduchy of Baden, German Empire,
Jeweller, 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 relates to improvements in bracelets, napkin rings and similar
ring shaped objects the construction of which is based on the principle of the combined
scissors as known under the name of Nuremberg scissors.
Said Nuremberg scissors consist of flat levers or bars laid crossway one upon the
other and pivoted together; the free ends of these bars being loosely connected with
the free ends of corresponding bars, by means of which the levers can be drawn out
and drawn in as described.
The improvements consist in a spiral or other spring so placed in any part of the
bracelet or napkin-ring that the levers of said objects are continually drawn together
and thus form an elastic ring.
The bracelets, napkin-rings etc. hitherto constructed after the system of Nuremberg
scissors have all the one drawback that the ring never remains closed but opens from
itself owing to the pressure operating from the inside of the ring, without closing
automatically. To avoid said inconveniences different catching and closing devices
have been constructed but none of them was serving the purpose.
The improvement of this application now consists in the arrangement of a spiral
spring, the ends of which operate upon two levers or bars r², crossing each other,
of a Nuremberg scissors-ring in such a manner that the bars are always drawn
together by the spring, thus forming an elastic self closing ring.
The manner in which I intend to execute my invention is shown in the accompanying
drawings which make part of this invention and in which
Fig. 1 is a section of two crossing bars with the spring arrangement.
Fig. 2 is a side view of said bars, the spring box kk being shown in section.
Fig. 3 & 4 are sections of modifications.
Fig. 5 is a side view of fig. 3.
Fig. 6 a top view of fig. 4.
Fig. 7 a perspective view of a drawn in or closed ring and fig. 8 the same view of a
drawn out or opened ring.
Similar letters of reference indicate similar parts in all figures.
In fig. 1 & 2 the two crossing bars are at the crossing point provided with a
case or box k k¹ catching in each other and connected hinge like by means of a pin d.
The boxes kk contain a spiral spring f, one end of which passing through the lower
box k into the bar and the other end through the upper box k into bar r whereby
both bars are contracted.
In fig. 3 & 5 a spiral shaped spring f is used instead of the spiral shaped screw
spring, one end of which being attached to the upper box k and the other end to the

page_text: lower box k¹. These two boxes are also connected hinge like by a pin d. Fig. 4 & 6
show a further modification in which the spring does not operate upon the fulcrum
of the crossing bars rr but upon the ends of said bars which are each connected
hinge-like with a box h h¹ (fig. 4). The latter catch into each other by means of a
pins and a slit s' and are provided with a spiral spring f which presses the two boxes
asunder and brings the bars 7, together.
By means of the described construction a very elastic and self closing ring is
formed which can be easily drawn out without opening automatically.
Having thus described the nature of my invention what I claim is:
In bracelets, napkin rings and similar ring shaped objects, constructed on the
principle of the Nuremberg scissors the spiral spring f which operates upon two
crossing bars r&r of a Nuremberg scissors ring in such a manner that the bars are
always contracted by the spring; substantially as described and shown.
T
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of December 1007
HOUTO
130T 100TTOOS
KOR TO SIT OFT
HERMANN DREWS.
By A. Kuhnt & R. Deissler,
38, Alexander Str., Berlin, Germany