Improvements in Pince Nez or Double Eye Glasses.
Year: 1891

page_text: Date of Application, 5th June, 1891
Complete Specification Left. 4th Mar.. 1892-Accepted. 21st May, 1892
PROVISIONAL SPECIFICATION.
Improvements in Pince Nez or Double Eye Glasses.
I, JOHN SEVERIN JOHNSON Optician of 1 Lower Charles Street Clerkenwell,
London do hereby declare the nature of this invention to be as follows:-
My invention has reference to pince nez or double eye glasses and my object is
to make eye glasses of a construction, that shall always retain the position of the
lenses in an axial line, be easily fixed and sit rigid and square on the face with the
least possible amount of pressure on the nose.
To effect this purpose I make eye rims of a suitable shape and fix to their upper
edges, loops or grooves, but preferably tubes. The bridge I make solid and in one
piece, but may be hinged. The ends of this bridge are made of a shape to fit
exactly, but work easily and smoothly, in the said tubes. By the ends of the tubes
and towards the nose I fix small projections or guides to which the placquets may
be fixed. These guides are provided with small springs and they pass through
suitable eyelets or lugs fixed to the bridge, which act as stops, when the springs are
expanded and also serve to compress the springs and so create a tension or grip,
when the two halves of the eye glasses are pulled apart to fit on the nose.
bridge is not fixed to the eye glasses, but floats or slides back and forth in the tubes
as a piston in a cylinder and therefore maintain a constant parallel axis of the
lenses and great rigidity with the least possible pressure on the nose.
"Luth 1001
The
COMPLETE SPECIFICATION.
Improvements in Pince Nez or Double Eye Glasses.
I, JOHN SEVERIN JOHNSON Optician of 1 Lower Charles Street Clerkenwell,
London E.C. 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 :-
My invention has reference to pince nez or double eyeglasses and my object is
to make eyeglasses of a construction that shall always retain the position of the
lenses in an axial line to be easily fixed and set rigid & square on the face with
the least possible pressure on the nose.
To effect this purpose I make eyerims of a suitable shape and fix to their upper
edges, loops or grooves, but preferably tubes. The bridge I make solid and in one
piece, but it may be in pieces hinged. The ends of this bridge are made of a shape
to fit exactly but work easily and smoothly in the said tube. By the ends of the
tube towards the nose I fix small projections or guides to which the plackets may
be fixed. The guides are provided with spiral springs round them and pass through
suitable cyclets or lugs fixed to the bridge, which act as stops, when the springs
are expanded and also serve to compress the springs and so create a tension or grip
when the two halves of eye glasses are pulled apart to fit onto the nose.
The
bridge is not fixed to the eyeglasses, but floats or slides back and forth in the tubes
as a piston in a cylinder and therefore maintain a constant parallel axis of the lenses
and great rigidity with the least possible pressure on the nose.
The accompanying drawing will render my invention clearly understood.
Fig. 1 is an elevation of the usual form of my invention.
Fig. 2 shows the same with the springs compressed.
A is a tube fixed to the upper edge of eyerims into which the bridge B fits and

page_text: moves easily. Care projections or guides on which loops or catches D, which are
fixed to the bridge, are made to slide.
The guides or projections C have round them fine spiral springs. When the eye
glasses are opened to be put on the face, the springs are compressed by the loops D,
as shown in Fig. 2.
Fig. 3 represents the bridge,
Fig. 4 the tubes.
Fig. 5 the guides or projections without the spiral spring.
Fig. 6 the plackets or nose pieces, which are screwed on at E & F, but I employ
any other form of suitable placket.
Fig. 7 the loops D to be fixed to the bridge.
As regards particulars of construction various modification may be made. The
tubes, grooves or catches for bridge to slide in may be round square or oblong.
The guides or projections may be round or any other shape and the upper ends of
the plackets may slide on the guides instead of being screwed on.
Having now particularly described and ascertained the nature of this my inven-
tion and in what manner the same is performed, I declare what I claim is
1. The improvement substantially as herein set forth in or connected with
pince nez or double eyeglasses.
2. A. pince nez or double eyeglasses with solid rigid bridge on which the two
eye-pieces slide, maintaining the position of the lenses in an axial line.
3. Pince nez or double eyeglasses the expansion and contraction of which is
affected by the spiral springs on the guides or projections as described.
Dated this 4th day of March 1892.
J. S. JOHNSON.