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Патент USA US2070392

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Feb-'9, 1937- '
Filed July 1, 1931
John B B?owm'ny
Mwé $002142,
Patented Feb. 9, 1937
John Bailey Browning, Camden, N. J.
Application July 1, 1931, Serial No. 548,143
9 Claims. (01. 274-—46)
One object of this invention is to provide an
improved method for recording the vibrations
corresponding to sound and/or light impulses
separately or simultaneously. Vibrations corre
5 sponding to sound and light impulses may be pro
duced in the manner disclosed in Patent No.
1,770,205 to Goldsmith dated July 8, 1930 or in
my prior application Serial No. 419,350 ?led Jan
uary 8, 1930.
Another object is to provide an improved press
ing system or method of stamper production for
vibrations corresponding to light and/or sound
impulses. Reference is hereby made to “Record
ed Programs” by A. J. Kendrick on pages 108, 109,
15 110 and 170 of the August, 1930 issue of Radio
News, from which article it appears that a stamp
er is the negative record or die from which com
mercial records are duplicated.
Further objects as well as details of construc
20 tion and operation will be hereinafter brought
out in the following description and accompany
ing drawing, in which
Figure 12 is a side view of an alternative form
of recording stylus.
Figure 13 is a side view of still another form of
recording stylus.
The method of my invention consists broadly 5
in chasing, chiseling, ironing, or otherwise form
ing undulations corresponding to sound and/or
light impulses or vibrations upon one or both
edges of a thin ?exible band of malleable material
such as metal. The metal tape after it isrecord- 10
ed upon may be wound upon a roll or spool and
reproduced whenever desired by means of a suit
able reproducing device as it is rewound upon an
other roll or spool. A preferable procedure is .to
wind the tape upon a suitable core to form a 15
Stamper, thus eliminating all the intermediate
steps previously thought necessary in the record
ing art.
Referring to Figures 1 and 2 wherein is illus
trated rather diagrammatically the embodiment 20
of my invention wherein is recorded upon each
edge of a metal tape a series of undulations cor
Figure 1 is a plan view illustrating rather di
agrammatically one embodiment of my process
responding to sound and/or’ light impulses, the
tape is greatly exaggerated.
cording devices I2 and "I3. As clearly shown in
Figure 2 each series of undulations is in a plane
which is perpendicular to that of the metal tape.
tape I is shown being unwound from a roll or
25 of recording.
spool 2 and passed between forming rolls 3 and 4 25
Figure 2 is a side view showing the process of to form the middle portion 5 and the thinner edge
Figure 1.
portions 6 and ‘I. The edge portions 6 and ‘I
Figure 3 is a cross-section taken along line 3-3 _ are each chased, chiseled, ironed, or otherwise
of Figure 2 and showing one form of recording provided with a series of undulations 8 and 9
30 tape prior to its being chased, ironed, chiseled or by means of the styli I0 and I I actuated by the 30
otherwise recorded upon. The thickness of the diagrammatically illustrated electrodynamic re
Figure 4 is a cross~section taken along line‘
4-4 of Figure'2 and showing the recording tape
35 at the moment it is being recorded upon.
The elastic or rubber-covered roller I4 is shown 35
Figure 5 illustrates cross-sections of two alter
native forms of recording tape.
cording devices. _ The recorded tape is then
Figure 6 is a fragmental, diagrammatical il
lustration of a second ‘embodiment of my new
Figure '7 is a cross-section taken along line
'l~;-~'I of Figure 6.
Figure 7a is a view showing a series of undula
45 tions being impressed in. one edge of a tape
(greatly exaggerated) by the drawing action of
a stylus, which is shown in cross-section.
Figure 8 is a vertical cross-section through a
stamper made by my process.
Figure 9 is a front view clone form of record
ing stylus._
Figure 10 is a cross-section taken on line I?-IO
of Figure 9.
5 Cl
Figure 11,is a cross-section taken on line I I--I I
of Figure 9.
' supporting the tape as it passes through the re- 0
passed through a suitable apparatus I5 for set
ting the undulations in the metal and ?nally
wound upon a roll or spool IS. The undulations 40
in‘ the tape may be set in the metal in a manner
[similar to that in which steel springs are hard; ‘
“ened and tempered.
' Figure 5 showsv two possible alternative cross
sections of tapes that may be used in my process, 45
the one indicated by H having tapered edges and
the one-indicated by I8 having rounded edges,
instead of the thinned edges as illustrated in
Figures-3 and 4.‘ ~
Figures 6, '7 and ‘7a illustrate two alternative 50
forms of my improved method. In both of these
methods, the thinned edge of the tape as it is fed
from one spool to the other is straddled by one or
the other forked ends 25 or 26 of the stylus 20._
In the ?rst method the stylus is given a vertical
vibratory movement by means of a suitable
Thus it will be seen that I have provided a method
electro-dynamic recorder of sound and/or light‘ for directly making the stamper of the recording
process with the consequent elimination of the
usual intermediate steps previously considered
impulses and thus its forked end 25 produces the
series of undulations i9 along the edge 6a of the
tape Ia. In the second of these methods, the
‘ stylus 20 has imparted thereto a vibratory move
ment perpendicular to the plane of the tape lb
and thus its end 26 produces the series of hill and
dale undulations Na in the edge 61) by a combined
10 twisting
and drawing action. The requisite
vibratory movement can be produced by means
indispensible in the art. The disk stamper made
by the method of Figures 1 to 4 results in a lateral
cut record while those of Figures 6 and '7 will
produce one of ‘the vertical-cut or “hill and dale”
type, and that of Figure = 7a. will produce a
“lateral”-cut record.
of a suitable form electro-dynamic recording de
While only oneedge is shown in Figures 6, '7
and 7a. as being recorded upon, either process
may well be applied to both edges of the tape.
One edge of the ,tape may be provided with un
dulations corresponding to sound impulses and
the other with undulations corresponding to light
impulses, or one or both edges may be impressed
with undulations corresponding to both sound
and light impulses, i. e. one series of undulations
may represent a talking moving picture.
In the first embodiment of my invention, I may
use either of the styli shown in Figures 12 and 13.
That of Figure 12 is formed with a pointed edge
2| at one end while that of Figure 13 is provided
with a pointed end 22 and a button or ball end
23, either one of which may be used for recording.
As has been stated, the stylus 20 shown in
Figures 9, 10 and 11 may be used in the second
and third embodiments of my method. This
stylus has two forked ends 25 and 26, the ?rst
of which is used when the undulations are pro
35 duced in the edge of the tape by a vibratory
movement of the stylus in the plane of the tape
and the second of which is used when the stylus
is vibrated perpendicular to the plane of the tape
to produce a series of undulations by a twisting
40 and drawing action on the tape as it is fed
through the forked end.
The recorded tape made by any of the above
described processes may be reproduced by passing
it through a suitable reproducing device while
45 being rewound from one spool onto another. If
the tape is to be reproduced in this manner, the
step of forming the thinned edge portion shown
in Figures 1 and ZImay be omitted. Duplicate
records of this type may be made by passing the
50 recorded tape through a suitable pressing device
in face-to-face contact with a second blank tape.
This latter method of making duplicate records
may be used to provide a sound track along the
edge .of a moving picture ?lm.
My preferred method is to wind the recorded
tape about the pin 21 and core 21a .to form the
stamper shown in Figure 8. The wound tape
may be maintained in its spirally wound form
in any suitable manner, as by means of a clamp
ing ring 29. The thinned portions 6 and ‘I thus
form the walls of the grooves 28 of the stamper.
In‘ the ?nished record, the thinned portions 6
and ‘I will form the grooves and the grooves 28
of the stamper will form the walls.
65 ' An alternative method of forming a stamper
is to wind the tape I after it is provided with
By my improved methods, I am enabled to
produce a record of either the lateral-cut or
“vertical-cut” type which can play for relatively
long periods of time.
In the case of the "vertical
cut" type, the grooves can be spaced as close as
?ve hundred (500) to the inch and the record
made of su?icient diameter to play for as long as
seven hours.
Since my records are capable of containing a
large amount‘ of program material, it is possible a
to record several selections on each side.
The foregoing constitutes the essential and
distinctive thought of my invention, but it is to
be understood that the same may be combined
with various other steps and details without
a?ecting the peculiar results obtained.
I claim:—
1. A method of recording which consists in
chasing or engraving a continuous series of lateral
undulations in the plane of the edge of a thin 30
tape corresponding to the impulses to be recorded.
2. A method of directly making a stamper
which consists in producing an oiT-set edge in a ’
thin strip of material, forming a continuous series
of undulations in the off-set edge corresponding I
to the impulses to be recorded, treating said strip
to set the undulations and winding about a core.
3. A record consisting of a metallic strip, in
the plane of whose edge is chased or engraved a
continuous series of lateral undulations corre 40
sponding to the impulses recorded.
4. A stamperfor sound records consisting of a
tempered strip of flexible metal provided along
one or both edges with a series of undulations
corresponding to the impulses recorded and
permanently wound into disk form, the windings
being in direct contact.
5. A stamper blank for sound records consisting
of a strip of malleable metal permanently wound
into disk form, the windings being in direct con
6. A stamper blank for sound records consist
ing of a strip of malleable metal having a thinned
edge portion permanently wound into disk form.
said thinned edge serving to form a spiral groove .
in said disk.
'7. A method of recording on the edge of a
moving picture ?lm which consists in passing the
unheated ?lm through a pressing device in face
to-face contact with a metallic strip having im
pressed therein undulations corresponding to the
vibrations to be recorded.
8. A method of recording which consists in
straddling a thin tape with a bifurcated record
ing tool and moving said tape as the tool-is
vibrated in accordance with the impulses to be
the thinned edge portions 6 and 1 into a blank
and record thereupon by means of a suitable
stylus mounted in a suitable recording device (not
perpendicular to that of the-tape and vibrating
Commercial records may be made in the usual
ways known to the art from the stamper made
in any of the previously described methods.
9. A method of recording which consists in
moving a thin tape with its edge in contact with
a recording tool which is maintained in a plane '
said tool in accordance with the impulses to be
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