Improvements in SoION
Year: 1894

page_text: Date of Application, 3rd Aug., 1894
Complete Specification Left, 3rd May, 1895-Accepted, 15th June, 1895
Improvements in SoIONCO
JOHN HENRY BARTON 18 Greame Street, Moss Side, Manchester, in the County
of Lancashire England, Lanternist and Mechanician do hereby declare the nature
of this invention to be as follows:-
The idea of this invention is to provide an arrangement whereby the front of an
optical lantern can be rapidly and easily converted from the ordinary position for
"vertical arrangement" or
shewing slides &c., into another position known as a
"vertical attachment as used in various scientific experiments &c.
The result in the present plan is arrived at as follows;
"
(a) A portion of the front of the lantern is pivotted, or hinged to the main body
of the lantern, at, or near the top of the same; the portion thus pivotted, or hinged,
carries a portion of the condensor.
(b) A plane mirror having hinges or pivots at the top of it, is fixed by the same
to the aforesaid moveable portion of the lantern front, at any convenient position
between the lower portion of the part of the condensor which it carries, and its
extreme lower edge.
When the lantern is in use in the ordinary position, the hinged mirror aforesaid
hangs perpendicularly, and is out of the way (the lantern of course being arranged
so that there is room for it thus to hang), but on the vertical position being required
it is only necessary to bring up the moving front into a horizontal position, and to
place the lower edge of the plane mirror which it carries, against a stop or ledge at
the front of the main body of the lantern; this moveinent which only takes a
moment to perform leaves the plane mirror at the proper angle of 45 degrees, while
at the same time it (the plane mirror) supports the stage of the lantern (otherwise
the moving front aforesaid) in a horizontal position.
This attaching by pivots, or hinges of the plane mirror to the lower portion of
the swinging lantern front, obviates the disadvantage of the plane mirror being a
separate part.
Dated this Second day of August 1894.
JOHN HENRY BARTON.
Improvements in Science Lanterns.
JOHN HENRY BARTON 111 New Bond Street London W. late of 18 Greame
Street Moss Side Manchester in the County of Lancashire England, Lanternist
and Mechanician 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 :-
The idea of this invention is to provide an arrangement whereby the frout of an
optical lantern, can be rapidly and easily converted from the ordinary position for
shewing slides &c., into another position known as a "vertical arrangement" or

page_text: "vertical attachment" as used in various scientific experiments &c. The result in
the present plan is arrived at as follows:-
A portion A Figs. I and II of the front of the lantern is pivoted or hinged to
the main body. B Figs. I and II of the lantern at or near the top of the same,
but there is a distinct advantage in placing the hinges or pivots as near as possible
in the position indicated in the drawings.
The portion thus pivoted or hinged carries the front portion of the condensor,
and also the objective. A frame or plate D Figs. I and II carrying a plane mirror
is affixed by means of hinges or pivots to the moving or swinging front & Figs. I
and II, at the position marked Figs. I and 11. This plane mirror D aforesaid,
might if desired be hinged or pivoted anywhere lower down nearer the bottom edge
of the moving or swinging portion A, but the position shewn, allows of the plane
mirror D being kept as short as possible.
When the lantern is in use in the ordinary position, the hinged mirror D afore-
said, hangs perpendicularly, and is out of the way (the lantern of course being built
in such manner (not necessarily in the manner shewn) as to allow of its thus
hanging) but on the vertical position being required, it is only necessary to bring
up the moving front A from its position as shewn in Fig. I to that shewn in Fig. II
and to place the lower edge of the plate or frame D carrying the plane mirror,
against a stop or ledge at the front of the main body of the lantern; this stop or
ledge is shewn at Figs. I and II.
It will be seen that this movement (which only takes a moment or so to perform)
leaves the plane mirror Daforesaid at the proper angle of 45 degrees, while at the
same time it (the plane mirror) supports the stage of the lantern (otherwise the
moving front aforesaid) in a horizontal position. It will also be seen that the objective
bas by the same movement been brought into the required position and it only
remains to adjust its small mirror or prism in the usual manner.
This attaching by pivots or hinges of the plane mirror D aforesaid to the lower
portion of the swinging lantern front A aforesaid, obviates the disadvantage of the
plane mirror being a separate part.
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 hinging or pivoting of a plate or frame carrying a plane mirror to the front
or stage of a projection lantern in such manner or position that the instrument can
readily be converted from horizontal projection to vertical projection & vice versa,
substantially as figured and described.
Dated this Third day of May 1895.
JOHN HENRY BARTON.