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Патент USA US2503741

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April 11, 1950
2,503,740
K. JELINEK
PROJECTION DEVICE FOR PRESENTING
AND REPRODUCING READING MATTER
Filed Aug. 6, 1947
3 Sheets-Sheet 1
36
IN VEN TOR.
KAREL JEL/NE'K
‘BY
WW
ATTORNEY
April 11, 1950
K. JELINEK
PROJECTION DEVICE FOR PRESENTING
AND REPRODUCING READING MATTER
Filed Aug. 6, 1947
2,503,740
3 Sheets-Sheet 2
\\\
INVENTOR.
KAREL JEL/NEK
MM; _
BY
WWL,
A TTORNE Y
April 11, 1950
'
>
K.
JELINEK
2,503,740
-
PROJECTION DEVICE FOR PRESENTING
I AND REPRODUCING READING MATTER
3 Sheets-Sheet 3
Filed Aug. 6, 1947
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INVENTOR.
KAREL JEL/NEK
BY
“
WW'M
ATTORNEY
2,503,140
Patented Apr. 1 1, ‘1950
UNITED STATES PA'rsnr; OFFICE
2,508,740
asm'rmc asp
BEPRODUCING READ G MATTER
Karel Jelinek, Blanch, Cseohcslmkia
Application August I, 1947, Serial No. 766,728
In Cscchoslovakfallay 12.1947
PROJECTION DEVICE FOR
SCInlms. (0183-44)
1
The invention relates to a device for present
ing and reproducing reading matter, such as
books and the like in a novel easily readable
matter‘is improved by the invention. The read
' ing may be accompanied by music or speech
through the aid of additional talking ?lm strips;
this may be of great help in the teaching and
The hitherto customary reading of books and 5 learning foreign languages.
form.
Drawings and pictures may be used in addi- .
the like reading matter involves a series of grave
disadvantages.
(a) The individual lines end arbitrarily, for
instance, sometimes in the middle of the words
or in the middle of sentences expressing a co
herent train of thoughts.
(b) The reader must retrovert his look after
each line to the next; this not only causes a
loss of time, but irritates the nerves.
tion to the reading matter for purposes of clari
?cation, these pictures either appearing as sta
tionary elements or being a part of the moving
‘
_
(c) The individual lines of the reading mat
ter must be ?xed by the reader and lifted from
the grey appearance of the other lines; this
10
?lm itself.
_
'
Suitable coloring may be used for the pro
jected reading matter, for instance, a dark-green
color for the projected lines and a white color
for the background, or white letters may be pro
15 jected on a dark-green background; this will
have a favorable influence on the eyes.
1
The daylight which is rather hard on the eye
sight may be eliminated by providing the read
means a great strain on the eyes; it also acts
unfavorably on the nerves and often leads to
ing device with suitable shading attachments.
20 The advantages of my invention, therefore,
near-sightedness.
The height of the lines and of the letters or
result from the low costs of the ?lm manufacture,
pictures included in the reading text is unalter
from the quick reading of the ?lm, from the
savings in space and time, from the free movabil
able.
(d) ' Mistakes in the text cannot be corrected
ity of the hands of the reader, from low oper
and the paper cannot be used for reprinting pur 25 ating costs and from a reduction of the strain
poses.
on the nervous system.
It is the object of this invention to eliminate
The invention will now be described in de
the aforesaid drawbacks.
tail and with reference to the accompanying
Therefore, the reading matter, as for instance
drawings illustrating a preferred embodiment
the text of a book, is in conformity with this 30 thereof.
invention applied to an endless ?lm in such a
In the drawings,
manner that the lines of the reading matter
Fig. 1 is a vertical sectional view of my read
extend on the ?lm in spirally-shaped adjacent
ing device on line 2-4 of Fig. 2,
tracks and in nearby parallel relationship to the
Fig. 2 is a plane view of the same,
longitudinal edges of the film. The reading mat 35 Fig. 3 is a vertical sectional view on line A-‘-A
ter is continuously projected‘fr'om the ?lm onto
of Fig. 2,
.
'
a screen, a ground glass plate and they like in such
Fig. 4 is a vertical sectional view on line B
a manner that the lines run in front of the
ofFig. 1.
reader from right to left in a spiral continua
_ The device forming the subject matter of my
tion with ‘a speed and a size which may be se 40
invention comprises essentially a casing P hav
lected' at will, thereby creating what may be ,
ing an extension N which prevents direct access
called “a moving book."
ofthe daylight to a screen, such as a ground
This moving book may be placed in a suit
glass plate, not shown in the drawing, located
able box. Thelreader has during the reading
procedure both hands free and may use them 45 in extension N and adapted to make the read
for any desired activity. The reading speed is , ing matter visible, an electromotor M which
moves the ?lm, optical means 0 which enlarge
hereby improved because the to-and-fro move
the reading matter and a‘ light source Z supply
ment of the look is eliminated as only one line
ing the light for the ?lm projection; the source
always passes in front of the reader.
Thev costs of the reading matter, for instance, 50 of light may be a bulb which may be colored; its
of books and the like may be reduced to a tenth -. light intensity may also be reduced in another
or even twentieth part of the hitherto customary = manner, for instance, by a light ?lter.
The lines or letters of the reading matter are
costs required‘ for the printingand binding of
so arranged on the film that they appear in
the booksv and the like.
Moreover, the distinctiveness of the reading 55 spiral succession. The ?lm- may have ordinary
3
2,503,740
4
size. Three rolls II, II, II are provided to trans
port and to guide the ?lm.
The ?lm is put in motion by an electromotor
M which drives a toothed gear 2; this gear is
.
35 is located in front of the rear wall of the dia
phragm; it is displaceable by means of screw 34;
this slit has a width which corresponds approxi
mately to the height of the lines of the reading
mounted on shaft 3 which carries a friction roll
matter. Therefore there is never more than one
4, see Fig. 4; this roll is in frictional contact
line of the reading matter projected through slit
with disc 5 located on shaft 5; a spring ‘I sur—
35 and therefore visible on a suitable screen,
rounding shaft 6 presses disc 5 against roll 4,
whereby rotational movement is imparted to disc
5 from motor M; this rotation is then trans
mitted to the ?lm conveying rolls l8, l1, IS.
ground glass plate or the like. Slide 34 and silt
35 may be accurately adjusted with regard to the
lines of the reading matter by screw 36.
The operationof diaphragm, see Figs. 1 and
3, is e?fected as follows.
A disc i is fastened on shaft l5 which carries
film roll I5; a dog 31 is fastened to disc I; if'disc
I and thedog 31 is rotated it entrains the toothed
A bevel gear 3 is mounted on the one end of
shaft 8; this gear meshes with another bevel
gear ll, see Fig. 1, which is mounted on shaft 9;
a friction roll’ II is mounted on the one end of
shaft 3 and this roll is located between two fric
wheel 38 located on shaft 33. This shaft is pro
vided with an outside thread meshing with screws
4| and these screws are connected with dia
tion discs i2,~ l3; these friction discs are fastened
to sleeve l4-which is vertically displaceable on
shaft l5; shaft 5 carries the ?lm transporting
phragm 30; by rotation of the toothed wheel
roll it; the same shaft also supports disc 20 20 33 and the resulting displacement of the screws
which drives disc 201 located on shaft 2| of the
41 the diaphragm 30 and the slide 34 with its
?lm transporting roll IS.
slit 35 may be moved in parallel relationship.
The speed of ?lm F may be adjusted by the
The base plate 45 which carries light source Z
provision of a friction roll 4 located on shaft 3
is fastened to the diaphragm 30 and therefore
which latter is supported in bearings 23, 24, see
movable with the same whereby guarantee is ob
Fig. 4. The friction roll 4 may be displaced on
tained that the light rays are always properly
shaft 3 by means of a button 42 in such a man
ner that it contacts the roll disc 5 at a larger
'
centered.
What I claim is:
or smaller radial distance. The displacement
1. Device for presenting and reproducing read
of roll 4 is effected by button 42 located on the 30 ing matter comprising in a housing an endless
one'end of a threaded spindle 43 which carries
?lm, reading matter applied to said endless ?lm
screw 44; this screw displaces roll 4 and there
in the form of helical adjacent continuous lines
by changes the rotational speed of disc 5. The
extending in nearby parallel relationship to the
change of the rotational speed of disc 5 is then
longitudinal edges of said film, at least three ?lm
transmitted to the ?lm transporting roll l6.‘
conveying rolls, means to adjust the speed of the
Rolls 16, i8 and thereby the ?lm itself may be
?lm movement, a light source, a diaphragm, a
rotated in the direction of the ?lm showing or
slot in said diaphragm and optical means to en
opposite thereto or they may be stopped alto
large said lines and to project the enlarged lines
gether. The possibility of reversing the direc
through said slot, said speed adjusting means
tion of the ?lm movement is important because it 40 including a shaft, a motor to drive said shaft, a
enables the reader to reread a passage. For
friction roll on said shaft, a friction disc in
severing the ?lm travel sleeve l4 and friction
operational contact with said friction roll, means
to change the point of operational contact of said
discs l2, I3 attached thereto are provided; the
sleeve is displaceable on shaft II by the up and
disc and said roll and therewith the rotational
down movement of casing 25, which is connected 45 speed of said disc and means to transmit the
change of speed to the ?lm conveying rolls.
.
with the sleeve. This displacement is e?ected
2. Device for presenting and reproducing read
by a manually operated lever 25 attached to
casing 25 and rotatable about shaft 21; by means
ing matter comprising in a housing an endless
of this lever roll il may bebrought in contact
?lm, reading matter applied to said endless ?lm
with either one of the friction discs l2 or I3, the 50 in the form of helical adjacent continuous lines
contact being intensi?ed by springs 25, 29, or it
mav be stopped in an intermediary friction-free
position. In this intermediary position roll ll
does not contact any of the discs l2, l3 and the
?lm F will be accordingly stopped.
The interruption of the ?hn movement takes
automatically place after its ?nal passing over
the rolls I 8, it. This is effected in the follow
ing manner.
Diaphragm I3 is downwardly moved during the
?lm projection. A pusher 3| is connected with
the diaphragm, see Fig. 3. A stop 32, see Fig. 1,
is located in the way of the downward movement
of the diaphragm; stop 32 is fastened to rod 33
and this rod is connected with a lever 26. If
diaphragm 30 is moved down and has reached
the end .of its travel, pusher 3| hits stop 32; the
latter forces through the interaction of rod 33
and lever 26 casing 25 upwards; the friction
discs i 2, l3 are moved in an intermediary inop
erative position and the movement of the film is
interrupted.
The diaphragm 3. which has the form of a
casing is provided in its rear wall with a slot 40,
see Fig. 3; a slide 34 provided with a narrow slit
extending in near-by parallel relationship to the
longitudinal edges of said ?lm, at least three
?lm conveying rolls, means to adjust the speed
of the ?lm movement, a light source, a vertically
displaceable diaphragm, a slot in said diaphragm
and optical means enlarging said lines and to
make the same visible, means to vertically dis
place the diaphragm and means to control the
said displacement in dependence upon the change
of speed imparted to the ?lm, said means includ
ing a ?lm conveying roll, a driven ?rst shaft
carrying said roll, a second outwardly threaded
shaft, screws on said second shaft connected
with said diaphragm and means to rotate said
second shaft from said ?rst shaft.
3. Device for presenting and reproducing read
ing matter comprising in a housing an endless
?lm, reading matter applied to said endless ?lm
-in the form of helical adjacent continuous'lines
extending in near-by parallel relationship to the
longitudinal edges of said ?lm, at least three ?lm
conveying rolls, means to adjust the speed of the
?lm movement, a light source, a ‘vertically dis
placeable diaphragm, a slot in said diaphragm
and optical means enlarging said. lines and to
8,508,740
UNITED STATES PATENTS
make thesame visible, means to automatically
stop the movement of the film ‘upon its ?nal
passage through the ?lm conveying rolls said
means including a motor driven shaft, a friction
roll located on said shaft, two vertically movable s
' friction discs on both sides of said roll, a pusher
attached to said downwardly displaceable dia
phragm, a stop located in the path of said pusher
and lever operated by said stop to move said
fricti ‘n discs in an inoperative friction-free
position.
KAREL JELINEK.
REFERENCES CITED
The following references are of record in the 15
file of this patent:
Number
528,140
‘
966,342
1,076,404
1,166,384
1,190,370
1,206,984
1,256,931
1,580,286
1,624,667
1,641,727
1,776,123
1,987,710
2,357,593
2,379,534
Name
Date
Buckmore ________ __ Oct. 30,
Madaler __________ __ Aug. 2,
Bolam et al _______ __ Oct. 21,
Partridge ________ __ Dec. 28,
Billings __________ __ July 11,
1894
1910
1913
1915
1916
Bloom ____________ __ Dec. 5, 1916
Schlicker ________ __ Feb. 19, 1918
Cloud __________ _.-__ Apr. 13, 1926
Kern ____________ __ Apr. 12, 1927
Bradford _________ __ Sept. 6, 1927
Kroesen _________ __ Sept. 16, 1930
Robbins _________ __ Jan. 15, 1935 '
Leavell ___________ __ Sept. 5, 1944
Lowden __________ __ July 3, 1945
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