IMPROVEMENTS IN OPERA, FIELD, AND MARINE GLASSES
Year: 1877

page_text: LETTERS PATENT to Charles Moreau, Optician, of the City of Paris, in the
Republic of France, for the Invention of "IMPROVEMENTS IN OPERA, FIELD,
AND MARINE GLASSES”
Sealed the 20th July 1877, and dated the 2nd February 1877.
PROVISIONAL SPECIFICATION left by the said Charles Moreau at the Office
of the Commissioners of Patents on the 2nd February 1877.
CHARLES MOREAU, Optician, of the City of Pans, in the Republic of Fiance.
"IMPROVEMENTS IN OPERA, FIELD, AND MARINE GLASSES"
The object of tlus Invention is to regulate the distance of the glasses horizontally
so as to accommodate the eyes of diffcient individuals, which are more apart in
some persons than in otheis
In order to carry out my Invention I connected the two glasses by three horizontal
hollow metal bars or 1ods in which metal shafts slide The separation or contiac-*
tion of the glasses is effected by a vertical shaft, operated on by a button or knob
at the top, which acts on a pinion or pinions and lack at the lower end of the shaft,
and turning this knob to the right or left effects the regulation of distance between
the glasses as required by either diawing out or pressing in the slides horizontally.
The regulation of the focus is effected as usual
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Charles Moreau in the Great Seal Patent Office on the 25th July
1877.
CHARLES MOREAU, Optician, of the City of Paris, in the Republic of France.
"IMPROVEMENTS IN OPERA, FIELD, AND MARINE GLASSES"
The object of this Invention is to iegulate the distance of the glasses honzontally
so as to accommodate the eyes of different individuals, as some persons' eyes ale
more or less apart than others The usual mechanısın for regulating the focus is
not altered

page_text: The application of the principle is specially intended for long sighted glasses,
and is equally useful for marine glasses and opcia glasses of all sizes and forms
In order to carry out my Invention I connect the two glasses by three hollow
metal bais or bands in which metal shafts slide The widening or contraction of the
glasses is effected by a vertical shaft operated by a button at the top, which acts
on a pinion or pinions and rack at tho lower end In turning this knob to the
nght or left has the effect of regulating the distance of the eyes as required by
either diawing out or pressing in the slides honzontally.
The following description aided by the accompanying Diawings will clearly
explain the nature of the Invention
M is a metal bai oi slide connected to the glasses A and B This bar M bears
two branches independent of each other One of these C forms a kind of groove in
which a shaft D' (whose end is fixed to B) moves A second and similar bar M¹ is
fixed above and unites the glasses at this point so that the two bars preserve the
parallelism of the glasses by the parts C, C The movement requisite to bring the
two glasses to the position desned for the accommodation of the sight is effected by
the shaft T bearing the button E at its upper end This shaft has a pinion F at its
lower extremity working in a 1ack H on the shaft D' This shaft pivots at will
backwards and forwards, and separates or draws the glasses nearer together as
required Two small caps I and Ì maintain the shaft T and connect it with the
bais
Although the Diawing represents two pinions to the shaft a single one suffices
for the regulation of the sight
The mechanism for the adjustment of the focus does not present any particular
feature In the accompanying Diawing the movement, is shown as produced by.
turning the rollers R, R
Thus the improved glasses forming the subject of the present Invention have
two movements, one for regulating the focus, which does not differ from those in
use, and the movement constituting the feature of novelty my Invention, and
whose object is the regulation of the glasses horizontally to suit different individuals
whose eyes may be more or less aput
What I claim therefore is the horizontal adjustment of the glasses A and B by
means of the combined action of the bars M and M², sockets C, C, and shafts 1), D³,
the separation of contraction of the glasses being effected by the shaft T and rack H,
and pinion F, motion being communicated to the several parts for producing the
requisite adjustment to accommodate various sights by means of the button E, on
turning which to the light on left the glassos A and B are brought closer together
or are further separated.
In witness whereof, I, the said Charles Moreau, have hereunto set my hand
and seal, this Twenty-thud day of July, in the year of our Loid One 4
thousand eight hundred and seventy-seven.
E. HEBRE,
83, Boulevd. Sebastopol,
Pails.
C MOREAU. (LS.)