A New or Improved Device or Apparatus for Illuminating Photochromoscope Pictures.
Year: 1896

page_text: Date of Application, 8th Dec., 1896
Complete Specification Left, 8th July, 1897-Accepted, 11th Sept., 1897
PROVISIONAL
A New or Improved Device or Apparatus for Illuminating
Photochromoscope Pictures.
I, FREDERIC EUGENE IVES of, 2750 North:. Eleventh Street; in. the. City of
Philadelphia, State of Pennsylvania, United States of America...and of 119
Shaftesbury Avenue: in the County of London Photographer, do hereby declare
the nature of my invention to be as follows:-
My invention has for its object to provide a device or apparatus by means of
which photochromoscope pictures can be exhibited, very.,efficiently, by. artificial
light and the pictures be readily changed whilst the photochromoscoper is, secured
to or in the said device or apparatus so.that it cannot. be, accidentally, displaced.
According to my Invention I provide a case for containing the lamp by means of
which illumination is obtained. In the rear part of this case I mount a reflector
preferably with a flat back and sides. inclined..outwards towards the front. In
front I mount a sheet of opalized glass and preferably also a sheet: of glass;which
is tinted so as to correct any defect of colour of the illuminant. Between these
sheets of glass and the lamp I place at bottom and at the sides of the case, mirrors
which may be of silvered glass..and above I place a, hinged piece, which is
preferably blackened and beneath this a blackened screen extending, horizontally
inwards from the inside of the front of the case to about the, same, extent. as the
width of the bottom and side inirrors. Outside the case at the.,upper front, part
thereof I hinge a mirror with its reflecting surface on the. underside and, at the
bottom of the front part of the case, I hinge a platform made with guides. between
which the photochromoscope can be placed so that it. is held in. proper position
relatively to the illuminating device or apparatus. The mirror above, being turned
down will rest upon the upper part of the photochromoscope, and the,.said mirror
will then optically duplicate, at a suitable angle for illuminating. the upper sections
of the chromogram, the light diffused through the. opal glass from, the..lamp, aud
reflectors. By this means the intensity of the illumination of the photochromoscope
by a given source of light is about twice as great as it would be if the opal glass
were made long enough to light the whole series of images and at the same time
to be at such a distance therefrom as not to impede the changing of the
chromograms. The photochromoscope may be of any suitable form but the
apparatus is especially suitable for use, with an instrument such as is, shown, in
Figure 5 of the drawings accompanying the Specification. of. Letters Patent
No. 2305 of 1895 dated under International Convention 3rd July, 1894. granted. to
The reflectors mirrors and screens in the illuminating, device are preferably
secured so as to leave a little space. between them and the case for the, circulation
or passage of air.
•
.
By turning up.the front, outside mirror the pictures, can, be, removed from, and
fresh ones placed. in: the photochromoscope with great, facility and when the
apparatus is not in use it can be folded up very.compactly, by, folding down, the

page_text: outside front mirror, folding up the platform and sliding in a pauel at the back
provided with a flap which can be turned over to cover the top and be secured to
the turned up platform.
Dated this 8th day of December 1896.
JOHNSONS & WILCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.
A New or Improved Device or Apparatus for Illuminating
Photochromoscope Pictures.
I, FREDERIC EUGENE IVES, of 2750 North Eleventh Street, in the City of
Philadelphia, State of Pennsylvania, United States of America, and of 119 Shaftes-
bury Avenue, in the County of London, Photographer, 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:-
f
My invention has for its object to provide a device or apparatus by means of
which photochromoscope pictures can be exhibited very efficiently by artificial
light, and the pictures be readily changed whilst the photochromoscope is secured
to or in the said device or apparatus so that it cannot be accidentally displaced.
Figure 1 of the accompanying drawings is a vertical longitudinal section of a
device or apparatus constructed in accordance with my invention in its closed
position. Figure 2 is a section on the line 1-2 Figure 1. Figure 3 is a horizontal
section and Figure 4 is a perspective view of the apparatus in its open position and
with the photochromoscope (marked X) in place. is a mirror connected with the
photochromoscope.
A is a case for containing the lamp by means of which illumination is obtained.
The lamp chimney is indicated at B in Figure 4, but the lamp is not shewn in the
other Figures. It may be of any suitable kind such for instance as a lamp provided
with an Aner von Welsbach mantle. In the rear part of this case I mount a
reflector C preferably with a flat back and sides inclined outwards towards the front
as shewn. In front I mount a sheet of opalized glass or translucent material D
and preferably also a sheet of glass or transparent material E, which is tinted so as
to correct any defect of colour of the illuminant. Between these sheets D and E
and the lamp I preferably but not necessarily place at bottom and at the sides of
the case reflectors or mirrors F which may be of silvered glass. They are shown as
being retained in place by the buttons and spring f2. Above I place a hinged
piece G which is preferably blackened and beneath this a blackened screen g
extending horizontally inwards from the inside of the front of the case, say to
about the same extent as the width of the bottom and side mirrors or reflectors F.
Outside the case at the upper front part thereof I hinge a mirror or reflector H
with its reflecting surface on the underside and at the bottom of the front part of
the case I hinge a platform I made with guides or side ribs between which the
photochromoscope X can be placed so that it is held in proper position relatively
to the illuminating device or apparatus. The mirror or reflector II above being
turned down its front edge will rest upon the upper part of the photochromoscope
as shewn in Figure 4 or upon any other suitable stop and the said mirror or
reflector H will then optically duplicate, at a suitable angle for illuminating the
upper sections of the chromogram, the light diffused, through the sheet D from
the lamp and reflectors CF. By the use of the mirror or reflector H the intensity
of the illumination of the photochromoscope by a given source of light is about

page_text: twice as great
as it would be if the sheet D were made long enough to light the
whole series of images and at the same time to be at such a distance therefrom as
not to impede the changing of the chromograms. I do not limit myself to the
method of supporting the mirror or reflector H as shewn as it can be supported in
any convenient manner. The photochromoscope X may be of any suitable form
but the apparatus is especially suitable for use with an instrument such as is shown
in Figure 5 of the Drawings accompanying the Specification of English Letters
Patent No. 2305 of 1895 dated under International Convention 3 July 1894 granted
to me. The reflectors mirrors and screens in the illuminating device are preferably
secured so as to leave a little space between them and the case A for the circulation
or passage of air.
By turning up or removing the front outside mirror or reflector H the pictures
can be removed from, and fresh ones placed in, the photochromoscope with great
facility and when the apparatus is not in use it can be folded up very compactly
by folding down the outside front mirror or reflector H folding up the platform I
and sliding in a panel J at the back provided with a flap j which can be turned
over to cover the top and be secured to the turned up platform.
Although I have shewn only one opal or translucent glass D and mirror H and
support I for one photochromoscope I may use two or more such glasses mirrors
and supports in connection with an illuminating device (such for example as an
arc lamp or any other lamp which will give a sufficient light). For example in
Figure 5 I have shown a diagram embodying three glasses D and mirrors H each
for illuminating a photochromoscope X each supported by a support I. Provision
for illuminating two or more than three photochromoscopes may be similarly
arranged. In such an arrangement the inside reflectors will be correspondingly
modified in position or they may be omitted.
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:-
1. A device or apparatus for exhibiting photochromoscope pictures by artificial
light constructed substantially as hereinbefore described and illustrated in the
accompanying Drawings.
2. In a device or apparatus for exhibiting photochromoscope pictures a case for
containing a lamp or lamp and reflectors and having in front an opalescent or
translucent inedium or media and above and outside this (or each of these) a mirror
or reflector for distributing the light substantially as hereinbefore described.
3. In a device or apparatus for exhibiting photochromoscope pictures a mirror
or reflector hinged at its rear part to the case above and outside the opalescent or
translucent medium the front part of the said mirror resting upon the photo-
chromoscope or other suitable stop substantially as and for the purpose hereinbefore
described.
4. In a device or apparatus for exhibiting photochromoscope pictures a case for
the lamp with an opalescent or translucent frout and attached to the front of the
said case a platform or support for a photochromoscope fitted to maintain it in
correct position relatively to the illuminant substantially as hereinbefore described.
Dated this 8th day of July 1897.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.