IMPROVEMENTS IN SPECTACLES
Year: 1880

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki, Proprietor of the
Firm of J. Brandt et G. W. von Nawrocki, Patent Agent, of 124, Leipziger
Strasse, Berlin, Germany, for an Invention of "IMPROVEMENTS IN SPECTACLES."
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PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 22nd
December 1880.
'
GERARD WENZESLAUS VON NAWROCKI, Proprietor of the Firm of J. Brandt et
G. W. von Nawrocki, Patent Agent, of 124, Leipziger Strasse, Berlin, Germany.
IMPROVEMENTS IN SPECTACLES." A communication from Paul Goerz, of the City
of Stuttgart.
E
An essential condition of a good fitting pair of spectacles is that the centres of
the glasses should be placed exactly opposite the pupils of the eyes, to fulfil which
it is evidently necessary that opticians must either keep every possible shape in
stock or manufacture each individual pair according to the requirements of the
purchaser.
This Invention has for its object to remedy the above drawbacks, so that the
optician will not require to keep a variety of complete frames in stock.
It consists in making the curved connecting pieces or bridges between the two
glasses movable or changeable, and of various lengths and curves to suit the
varying distances between the eyes and other facial differences of different
wearers.
These connecting pieces or bridges may be secured to the spectacle frames in
various ways. According to one plan the spectacle frames may be furnished on
their inner edges or rims with small projections or lugs, into which are screwed the
ends of the curved connecting pieces or bridges, or the latter may be provided at
their ends with small pegs, or pins (or hooks), which are placed into corresponding
holes of the projections or lugs on the spectacle frames and fastened therein by
twisting or soldering.
Or in lieu of making the connecting pieces or bridges movable, they may be
divided in the middle and screwed at their divided ends into an adjusting nut or
cover piece. Or only one half of the connecting piece or bridge may be screwed
into the nut or cover piece, and the other half furnished with a pin which is let
into the nut or cover piece and screwed therein by small thumb or pinch screws.
This Invention is equally applicable to eye glasses or nose pinchers.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Gerard Wenzeslaus von Nawrocki in the Great Seal Patent Office on
the 22nd June 1881.
GERARD WENZESLAUS VON NAWROCKI, Proprietor of the Firm of J. Brandt and
G. W. von Nawrocki, Patent Agent, of 124, Leipzigerstrasse, Berlin, Germany.
" IMPROVEMENTS IN SPECTACLES." (A communication from Paul Goerz, of the
City of Stuttgart.)
An essential condition of a good fitting pair of spectacles is that the centres of
the glasses should be placed exactly opposite the pupils of the eyes, to fulfil which
it is evidently necessary that opticians must either keep every possible shape in
stock or manufacture each individual pair according to the requirements of the
purchaser.
This Invention has for its object to remedy the above drawbacks, so that the
optician will not require to keep a variety of complete frames in stock.
It consists in making the curve connecting pieces or bridges between the two
glasses movable or changeable, and of various lengths and curves to suit the varying
distances between the eyes and other facial difference of different wearers.
And in order to fully describe and ascertain the nature of this Invention, I will
now describe the same with reference to the accompanying Drawings, but in order
to distinguish it from what is old and well known I would first refer to Figure 1,
which represents a well known mode of connecting two glasses, viz., by a bridge
or cross piece a, which at each end is permanently secured to the glasses them-
selves, and to Figure 2, which represents another well known mode of connecting
the glasses, viz., by the cross piece a, which is permanently secured to the frame of
the glasses.
I will next proceed to describe the manner of carrying this Invention into effect
by shewing some modes of making the connecting pieces or bridges movable or
changeable.
These connecting pieces or bridges may be secured to the spectacle frames in
various ways. According to one plan the spectacle frames may be furnished on
their inner edges or rims with small projections or lugs, into which are screwed the
ends of the curved connecting pieces or bridges.
Figure 3 illustrates this mode; the ends of the connecting piece a are here
screwed into the lugs d on the frames b by turning one or both of these frames in
one direction or the other, the distance between the frames b or glasses may be
thus regulated as required; the screws should be a good or tight fit."
Figure 3 shows the reverse arrangement, the frames 6 being formed with
screws f, and the connecting piece a having thickened ends or lugs & which are
tapped to correspond with the screws f. Or the connecting pieces or bridges may
be provided at their ends with small pegs or pins (or hooks) which are placed into
corresponding holes of the projections or lugs on the spectacle frames, and fastened
thereon by twisting or soldering.
Figure 4 illustrates such an arrangement. The connecting piece a has hook
ends which are fastened into the lugs fon the frames b.
Or in lieu of making the connecting pieces or bridges movable they may be
divided in the middle and screwed at their divided ends into an adjusting nut or
cover piece, or only one half of the connecting piece or bridge may be screwed
into the nut or cover piece, and the other half furnished with a pin which is let
into the nut or cover piece and screwed therein by small thumb or pinch screws,
as shown in Figure 5, where the two halves a of the connecting piece or bridge are
secured in a common adjusting nut g. Figure 6 shows another arrangement of

page_text: the same class, in which the two halves a of the bridge are secured in a common
cover piece or coupling / by means of a set screw, thus also admitting of
adjustment.
This Invention is equally applicable to eyeglasses or nosepinchers.
In Figure 7 I have shown one such mode of arrangement. The eyeglass frames b
have lugs d for the pincer pieces / to screw into.
And having thus described and ascertained the nature of this Invention and
modes of carrying the same into effect, I declare that I claim,-
Constructing spectacles and eyeglasses with movable, adjustable, or changeable,
intermediate, connecting, or bridge pieces, for the purpose of suiting them to
varying distances between the eyes, and to other facial differences of different
wearers, all substantially as set forth.
In witness whereof, I, the said Gerard Wenzeslaus von Nawrocki, have
hereunto set my hand and seal, this Seventeenth day of June, in the year
of our Lord One thousand eight hundred and eighty one.
GERARD WENZESLAUS VON NAWROCKI. (L.S.)