Year: 1887

page_text: Date of Application, 12th July, 1887
Complete Left, 9th May, 1888
Complete Accepted, 15th June, 1888
I, ALFRED HAMILTON DOUGLAS-HAMILTON of 8 Chilworth Street Westbourne
Terrace in the County of Middlesex Gentleman, do hereby declare the nature of this
invention to be as follows:-
My invention relates to a construction of binocular telescopes such as are employed
as field glasses, or opera glasses, and of stereoscopes, in such a manner that the axes
of vision can be adjusted to suit the distance between the eyes of the observer while
they retain their parallelism.
For this purpose I make one of the telescope tubes with eccentric bosses which fit
in bearings formed in the external casing of the tube, so that by turning this telescope
tube more or less round, its axis as it revolves in a small circle around the axis of its
casing, is made to approach towards or to recede from the axis of the other telescope
tube, still retaining its parallelism therewith. Obviously, both telescope tubes may be
thus mounted eccentrically in their respective casings, so as to obtain symmetry in
the instrument, and to lessen the necessary degree of eccentricity in the mounting of
of each telescope. In a similar way the glasses of stereoscopes are mounted
eccentrically.
ABEL & IMRAY,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
An Improvement in Binocular Telescopes and Stereoscopes.
I, ALFRED HAMILTON DOUGLAS HAMILTON of No. 8 Chilworth Street Westbourne
Terrace in the County of Middlesex, 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 :-
My invention relates to a construction of binocular telescopes such as are employed
as field glasses, or opera glasses, and of stereoscopes, in such a manner that the axes
of vision can be adjusted to suit the distance between the eyes of the observer, while
they retain their parallelism.
For this purpose 1 make one of the telescope tubes with eccentric bosses which fit
in bearings formed in the external casing of the tube, so that by turning this telescope
tube more or less round, its axis as it revolves in a small circle around the axis of its
casing, is made to approach towards or to recede from the axis of the other telescope
tube still retaining its parallelism therewith. Obviously both telescope tubes may be
thus mounted eccentrically in their respective casings, so as to obtain symmetry in
the instrument, and to lessen the necessary degree of eccentricity in the mounting of
each telescope.
Also instead of mounting the whole of each telescope tube eccentrically, the object
glass and the eye glass may each be mounted in an eccentric bearing so that they can
be turned more or less separately.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
Mounting the lenser of binocular telescopes or stereoscopes in eccentric bearings so
that the distance between the binocular axes can be adjusted by turning the lenses
more or less round in their bearings, substantially as described.
ז
11
$14000
הוו
9th day of April 1888.
ABEL & IMRAY,
Agents for the Applicant.
ABEL & IMRAY,
Agents for the Applicant.