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Патент USA US2123323

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July 12, 1938.
p. ‘VON MIHALY
2323,323
‘ SOUND? RECORD
Filed March 28, 1929
.I/n ventar:
0.“ WWI Wh'hqé/
2,123,323
Patented July 12, 1938 .
UNITED STATES PATENT OFFICE’
_ 2.12am
SOUND asooan
Dénes vlon Mihaly, Berlin-Wilmersdorf, Germany.
assignor to the ?rm Julius Pintsch Aktien
gesellschaft, Berlin, Germany
- Application March 28, 1929, Serial No. 350,692
In Germany December 8, 1928
'1 Claims. (01. 214-415)
of ?lm provided with a sound record according
Various sound records upon ?lm sensitive to‘
light are already known, as well as apparatus
to the invention.
of the ?lm shown in Fig. 1.
of an‘ arc lamp inductively by microphone cur
guided by rollers ,2 and is provided with a con
tinuous photographic sound record 3 of less width
rents and allowing the varying light of the arc
lamp to act through a slit upon a sensitive ?lm
than the ?lm. The sound record extends a num
moving rapidly past it. To the sound vibrations
in there correspond varying bright and dark strips
ber of times around the ?lm along lines which 10
are parallel to each other and “to the edges of
upon the ?lm.v If such a ?lm is passed, in front
of a constant source of light, and the rays of
' the ?lm, the record shifting at intervals and pass
ing completely around the ?lm between two such
the source of light darkened to‘ a varying extent
by the variations in the depth of the blackening
displacements.
corded can again be heard.
The advantages of such ‘a reception and repro
_ duction of sound, as compared with those of a
disc‘talking machine are immediately obvious.
25 Since both the recording and the reproduction
are effected by means of a ray of light no wear
of the sound record carrier can occur. Further. more duplication is cheap and simple. The rec
ord carrier is unbreakable. ' .
.
These lines form a plurality of sound track 15
ii of the ?lm are thrown upon a’ cell which is sensie
tive to light and which is connected in a joint
circuit with a telephone, corresponding variations
in the resistance of the sensitive cell are pro
duced and corresponding variations of current in
'
Referring to the drawing in detail, the endless 5 I
band-of light sensitive ?lm designated at I is
‘5 of these devices consists in in?uencing ‘the light
90 the telephone, so that the sound originally re
.,
Fig. 2 is an enlarged detail in plan of a part
forthe production of such ?lms and apparatus
for the reproduction of the records. The oldest
sections which are disposed generally longitudi
nally of the ?lm and the shifting of the record
forms crossover or bridging sections 4 connect
ing the end of‘ one sound track section with the
beginning of another sound track section.
20
What I claim is:-—
1. A sound record for talking machines and the
like, consisting of an endless band of light sensi
tive ?lm on which sound has been photograph
ically recorded in lines extending a number of 25
times around the endless band parallel to the
' edges of the ?lm, the record shifting from one
line to the next at intervals and passing com
pletely round the endless band between two such
The invention consists essentially in that the
record carrier is constituted by an endless strip
of ?lm on which the record of the sound runs
along lines which are parallel to the edges of the
?lm, which lines intermittently pass from one
85 into the other at one point of they ?lm. This ar- '
rangement has the advantage as compared with
displacements.
30
~
2. An endless transparent light-sensitive
standard type motion picture ?lm having a pho
tographic sound record thereon, said record being '
of a width less than that of said ?lm, said record
comprising a plurality of portions paralleling and 35
adjacent each other and paralleling the edges 01
the known arrangement in which the sound
the film, said portions being joined to form a
record runs along a spiral line, that when the ?lm -
single record.
breaks the same can be stuck together without -
3. An
endless
-
transparent
light-sensitive
standard type motion picture ?lm having a pho- 4o
tographic sound record thereon, said record being
of the sound record will no longer correspond . of a width less than that of said ?lm, said record
comprising a plurality of portions paralleling and
to one another.
It is also known to provide ?lms with a plu ‘adjacent each other and paralleling the edges of
the ?lm, said portions including’ bridging sec- 45
M rality of record strips being parallel to one an
other and to the edges of the ?lm. However, tions between the successive parallel portions, the
40 di?iculty whilst this is not possible with the
known arrangement, since in that case theends
such records are not continuous and for repro~
ducing the ?lm has to be moved alternately in
opposite directions which involves a complicated
50 driving mechanism and causes interruptions of
the sound reproduction at the end of each strip.
The accompanying drawing illustrates by way
‘ of example a sound record according to the pres
55
ent invention.
Figure 1 is a perspective view of an endless band
whole forming a single record.
'
4. A uni-directional endless transparent light
sensitive standard type motion picture ?lm' hav
ing a photographic sound record thereon, said 50
record being of a width less than that of said
?lm, said record comprising a plurality of por
tions paralleling and adjacent each other and
paralleling the edges of the‘ film, said portions
including diagonal bridging sections between the 55
2,123,323
.
successive parallel portions, the whole forming a sound record including integral crossover sec
tions between the; said several parallel sections.
single record.
5. An endless transparent light-sensitive . 7. A transparent light-sensitive endless iilm,‘
standard ty'pe motion picturet?lm having a pho including a unitary photographic sound record (
tographic sound record thereon, said record being comprising a plurality of sound tracks disposed 5
oi' a width less than that of said ?lm, said record generally longitudinally of the iilm and substan
comprising a plurality of portions paralleling and ' tially coextensive therewith, and continuous
adjacent each other and paralleling the edges bridging sections disposed between [the several
0! the iilm, said portions including rectilinear longitudinal sound-track sections and extending
10 bridging sectionsgbetween the successive parallel in the general direction of the said several sound 10
track sections for connecting the end of one
portions, the whole forming a single record.
8. In a transparent light-sensitive endless film
. a single narrow photographic sound record
thereon and disposed in parallel sections, said
sound track section with the beginning‘ of an
other sound track section.
'
.
nmms vos MIHALY.
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