Improvements in Opera, Field, and Marine Glasses.
Year: 1892

page_text: Date of Application, 8th Nov., 1892
Complete Specification Left, 8th Aug., 1893-Accepted, 23rd Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Opera, Field, and Marine Glasses.
I, HENRY MUNDAY CLARK, of 19, Grove Terrace, Highgate Road, in the
County of London, Gentleman, do hereby declare the nature of this invention to
be as follows
:-
This invention relates to improvements in the construction of opera, field and
marine glasses whereby they can be folded up when not in use into a relatively
small compass so as to be adapted to be conveniently carried in the pocket.
In carrying out my invention instead of mounting the lens in telescopic tubes as
hitherto I mount the lens in frames or plates the front frame being hinged to a
top plate while the other frame is hinged to suitable guides adapted to the said top
plate.
Any suitable means is employed for adjusting the plates relatively to one another
to obtain the proper focus.
By this arrangement when the glass is not in use the frames are folded down one
upon the other over the top plate into a flat rectangular shape.
The parts are kept in their closed position by any suitable means such as by
springs or catches.
Dated the 8th day of November 1892
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Opera, Field, and Marine Glasses.
I, HENRY MUNDAY CLARK, of 19, Grove Terrace, Highgate Road, in the
County of London, Gentleman, 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 the construction of opera, field and
marine glasses whereby they can be folded up when not in use into a relatively
small compass so as to be adapted to be conveniently carried in the pocket.
In carrying out my invention instead of mounting the lenses in telescopic tubes
as hitherto I mount the same in frames or plates the front frame being hinged to a
top plate while the other frame is hinged to suitable guides adapted to the said top
plate.
Any suitable means is employed for adjusting the plates relatively to one another
to obtain the proper focus.
By this arrangement when the glass is not in use the frames are folded down one
upon another over the top plate into a flat rectangular shape.
The parts are kept in their closed position by any suitable means such as by
springs or catches.
And in order that my invention may be the more readily understood, I have
shown same upon the accompanying drawings wherein :
Fig. 1 is a plan view of the glasses closed,
Fig. 2 being a like view of same shown open, while
Fig. 3 is a side elevation of the glasses likewise open.
In each of these views, the glasses are shewn inverted for the purpose of more.
clearly shewing the construction.

page_text: a is the frame of the glasses, consisting of a front plate a¹ hinged or pivoted to a
top-plate a, and a back plate a hinged or pivoted to another plate a' which
slides within guides b formed by flanges on the downwardly depending sides of the
top-plate a².
Racks c, formed with stops care provided on the lower face of the plate a¹,
which racks engage with a pinion d suitably mounted in the sides of the plate a³
and provided with a milled knob or thumb-piece d'. This rack and pinion arrange-
ment is for the purpose of adjusting the plates relatively to one another to obtain
the requisite focus.
The lenses e are mounted in the back and front plates a¹ and a³ as shown.
Flat springs are provided on the under surface of the plate at for the
purpose of maintaining the back and front plates in their closed or open
positions.
These flat springs are depressed by the pivotal arms g of the said back and
front plates a and a³ as shown.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
:-
The improvements in opera, field, and marine glasses, substantially as described
and illustrated in the accompanying drawing.
Dated this 8th day of August 1893.
HUGHES, SON & Co.,
38, Chancery Lane, London, Agents for the Applicant.