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Патент USA US2113397

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April 5, 1938.
M. s. CROFT
EXHIBiTING AND VIEWING APPARATUS
Filed May 22, 1936
2,113,397
2,113,397
Patented Apr. 5, 1938
UNITED STATES PATENT OFFICE
2,113,397
.
EXHIBITING AND VIEWING APPARATUS
Martin S. Croft, Chicago, Ill.
Application May 22, 1936, Serial No. 81,253
3 Claims. (Cl. 88—24)
This invention relates to improvements in ex
hibiting and viewing apparatus, particularly
adapted, though not necessarily limited in its use
for exhibiting and viewing transparent slides, and
The upper portion of the front wall II is in
clined upwardly and backwardly, and is provided
with an opening l2, forming a view opening. A
?ange l3 may be provided across the upper por
one of the objects of the invention is to provide . tion of the opening, and ?anges It may be pro
5 an improved apparatus of this character, well
vided 'along the vertical edges or walls of the
adapted for the use of students, for stimulating
in the individual student concentration and
special attention to the subject under considera
10
tion.
The top l5 of the box extending from the por
tion of the walljin which the view opening I2 is
arranged, is preferably inclined downwardly'to 10
-
eifected generally by means of the use of a stere
ward the rear wall I6, and if desired, the top 15
may be removable and may be secured in position
opticon or lantern inwhich transparent slides have
in any desired or suitable manner.
been employed, and the subject matter has been
projected upon the screen or wall, necessitating
Within the box thus formed is a partition H,
which extends from the bottom of the view open 15
the use of dark rooms and a special operator for
ing l2 rearwardly and preferably downwardly,
the apparatus.
and terminates a considerable distance short of
the rear wall 16 of the box.
Heretofore, the study of visual matter has been
Furthermore, when such apparatus is used and
the subject is projected upon a wall or screen, the
student’s mind is distracted for various reasons,
20
from the subject under consideration.
It is one of the objects of the present invention
to provide an improved apparatus of this char
acter by means of the use of which, visual mate
rial such as pictures, lantern slides, ?lms, reels,
etc., is made available to the individual student
or person, without the use of a stereopticon or
dark room.
A further object is to provide an improved ap
paratus of this character which will be simple,
durable, light, and compact in construction and
arrangement, inexpensive to manufacture, and ef
fective and ef?cient in operation.
.
To the attainment of these ends and the accomplishment of other new and useful objects as
will appear, the invention consists in the features
of novelty in substantially the construction, com
bination and arrangement of the several parts,
hereinafter more fully described and claimed and
40
opening.
shown in the accompanying drawing illustrating
this invention, and in which
Figure 1 is a vertical sectional view of an ap
paratus of this character constructed in accord
ance with the principles of this invention.
Figure 2 is a right hand end elevation of Fig
ure ,1.
Figure 3 is a detail, vertical, sectional view
taken on line 3-3, Figure 1, on an enlarged scale.
Figure 4 is a detail perspective view, on an en
larged scale, of the slidevholder, partly broken
away.
-
Referring more particularly to the drawing, the
numeral Ill designates a closed box or casing
which is constructedof any suitable material and
may be of any desired size and con?guration.
_ ‘
This partition I‘! extends entirely across the
box, and arranged at the inner end of the parti 20
tion is a wall provided with an upright portion l8
and a forwardly and downwardly inclined portion
I9. This wall cooperates with the front wall ll
of the box and the partition H to form a lamp
chamber 20 in which a suitable lamp 2| is ar 25
ranged.
In order to provide access to the lamp, a por
tion 22 of one of the walls of the box may be re
movable to constitute a door or closure for an
30
opening which constitutes an entrance to the
chamber 20, whereby access may be had to the
lamp.
In the inclined portion I! of the wall of the
chamber is an opening 23 of any desired size, and 35
arranged adjacent this opening are supports or
guides 24 for the reception of a screen 25, prefer
ably of ground glass.
'
Supported by the portion I9 of the wall on the
other side thereof and adjacent the said opening 40
23, are guides 26 for the reception of a slide in
which the picture or material to be exhibited is
held. This slide preferably comprises a frame
formed of top and bottom channel members 21
and an end member 28, the frame being shaped 45
to form an opening 29. The other end of the
frame is open as‘ at 30, and projecting beyond
this opening and in the same‘plane as one face
of the frame, is an extension 3i which is prefer
ably solid and is of any desired length. The free
end of the extension 3| may be shaped as at 32
to form a handle by means of which the slide may
be gripped.
The matter 33 to be viewed is placed within the
frame so as to extend across the opening 29, and 55
2
2,113,397
will be held in position by means of the ?anges 21
and the and member 28.
_
In the side wall of the box there is provided an
opening 34 of a size to permit the slide or frame
:1 to be inserted into the box and to be positioned
within the guides 26.
The matter 33, to be viewed is positioned in the
slide so that when the slide is placed in position
in the guides 26, it will be on the side of the
10 ground glass or screen 25 opposite to the side on
which the lamp 2| is arranged and will be dis
posed in close proximity to the screen.
The extension 3| on the slide is of such a length
that when the slide is in position, the end of the
extension will project beyond the box so as to
provide a handle by means of which the slide
may be manipulated.
It will thus be seen that the slide may be in
serted into and removed from the box through
the opening 34.
Arranged in proximity to the wall I 6 of the box
is a holder 34 having an opening 35 therein of
any desired size and con?guration, and this hold
er is adapted to receive and hold a concaved re
?ector 36, and which re?ector is preferably a
mirror, although any other concaved re?ector
suitable for the purpose may be employed.
The re?ector is held in position by means of
its edges resting behind suitable ?anges or sup
ports 31 on the frame.
The frame is mounted upon a slide 38 and the
slide in turn is mounted to move upon a support
39, which support preferably inclinesdownwardly
from the front to the rear thereof.
The re?ector 36 is positioned at such an angle
that a perfect image will be viewed through the
view opening of the box.
The slide 38 may be formed of any suitable
material, but is preferably formed of sheet ma
40 terial of a width slightly less than the width of
the frame or holder 34. The lateral edges of the
slide are preferably bent inwardly as at 40 to
form channels which overlap the edges 4| of the
supports 39. These supports 39 are preferably
formedof 'sheet material and are secured in po- ,
sition in any suitable manner, but are arranged
length between the re?ector and the object may
be obtained.
,
'
Any suitable means may be provided for vlimit
ing the movement of the slide 38 toward the ob
ject. A suitable and efficient device comprises a
member 41 secured within the path of the move
ment of the forward edge of the slide. This
member 41 may be of a ?exible or resilient nature
so that it may be de?ected and maintained in
its de?ected position to permit of the installa
tion or removal of the slide 38.
.
The opening 35 in the holder 34 for the re- '
?ector may be of any desired con?guration and
of any desired size.
The device thus provided will be of a simple,
durable and light construction, so that the same
may be readily transported, and the re?ector 36
is so positioned with respect to the object being
viewed that the rays of light from the lamp 2|
passing through the object being viewed will be 20
directed against the re?ector, and then re?ected
through the view opening I2.
When it is desired to change the object 33, the
slide containing the same may be drawn out
through the side of the box and either a new slide 25
interchanged therewith or the object 33 may be
removed and a new one substituted therefor.
With this improvement it will be manifest that
visual material is made available for the individ
ual student and the apparatus will stimulate con 30
centration and attention of the student, so that
his attention will not be diverted during ‘he time
of study of the object, and furthermore, the use
of dark rooms and expensive projecting appara
tus, heretofore used for this purpose, will be dis 35
pensed with.
4
While the preferred form of the invention has
been herein shown and described, it is to be un
derstood that various changes may be made in
the details of construction and in the combina 40
tion and arrangement of the several parts, with
in the scope of the claims, without departing
from the spirit of this invention.
What is claimed as new is:-—
1. A viewing and exhibiting apparatus em
bodying a housing having substantially vertical
45
uprightly with a portion of the top thereof bent front and rear walls, a portion of the front wall
inwardly as at 42 towards each other, and then ~ extending above the rear wall and inclined back
outwardly to form outwardly opening channels wardly. in a general direction towards said rear
so that the edges or channel 40 of the slide will wall, a view opening in said portion of the front
receive the edges 4| of the uprights 39, thereby wall, a downwardly inclined partition in the 50
providing a connecting means between the slide housing extending from‘ the base of said view
and the supports, which will permit of the slide opening toward and terminating a substantial
to be freely moved upon the supports to any de
distance short of the rear wall, an upright wall
sired position, and so that a predetermined focal depending below the end of said partition, a
length may be obtained and maintained between screen supported by and forming a part of said 55
the reflector 36 and the object 33 to be viewed. upright wall and cooperating with said partition
Any suitable means may be provided for mov
to form a lamp chamber, a lamp in said chamber,
ing the slide 38 upon its support, but a simple a curved re?ector in the housing, said re?ector
60 and e?icient means embodies a plurality of rack
having a ?xed angle of inclination, and means
members 43 secured to the bottom of the slide 38 mounting said re?ector for bodily movement to 60
and spaced laterally from each other. ‘A shaft ' ward and away from said screen, while the angle
44 passes through the supports 39 and the side of inclination of the re?ector remains substan~
walls of the box, and one end thereof extends tially constant.
beyond the box and is provided with a hand op
2. A viewing and exhibiting apparatus em 65
erating wheel or grip 45 by means of which the. ..
bodying a housing having substantially vertical
shaft 44 may be rotated.
Secured to the shaft 44 for rotation therewith
are gear wheels 46, one for each of the racks 43
and which mesh with the respective racks.
It will therefore be seen that by rotating the
shaft 44 by means of the handle or wheel 45, the
slide 38 together with the holder 34 and the re
?ector 36 may be moved toward and away from
front ‘aiid'rear walls, a portion of the front wall
extending above the rear wall and inclined back
wardly in a general direction towards said-rear
wall, a view opening in said portion of the front 70
wall, a downwardly inclined partition in the
housing extending from the base of said view
opening toward and terminating a substantial
distance short of the rear wall, an upright wall
depending below the end of said partition, a
75 the object to be viewed, so that the proper focal
75
3
2,118,897
screen supported by and forming a part of said
upright wall and cooperating with said partition
toward and terminating considerably short 01'
the opposite wall, a partition extending down
to form a lamp chamber, a lamp in said cham
ber, a curved re?ector in the housing, said re
?ector having a ?xed angle of inclination, means
mounting said re?ector for bodily movement to
ward and away from said screen, while the angle
of inclination of the re?ector remains substan
tially constant,'and a stop for limiting the move
10 ment of said re?ector toward said screen.
3. An exhibiting and viewing apparatus em
bodying a housing having upright front and rear
walls and provided with a view opening in one
of said walls, a concaved re?ector having a ?xed
15 angle of inclination and disposed in. alinement
with said view opening, a partition extending
wardly from the free end ‘of the ?rst said parti
tion to the base of said housing, a window in
the downwardly extended partition, a translucent
screen in said window, said screen being dis
posed in front of said curved re?ector, said screen
and the said downwardly extended partition co
operating with that wall of said housing in which
from the last said wall below said view opening,
the view opening is located, to form therewith 10
a lamp chamber, and means mounting said
curved re?ector for bodily movement toward and
away from the said screen and the said view
opening, while the angle of inclination of the
curved re?ector in relation to the .view opening 15
remains constant.
'
'
MARTIN S. CROFT.
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