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Патент USA US2112957

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April 5, 1938.
Filed May 7', 1935
2 Sheets-Sheet l
April 5, 1938.
Filed May '7, 1935
2 Sheets-Sheet 2
Hemn ch E MarGrzmemn
Patented Apr. 5., 1938
Heinrich F. Max Gramann, Orange; N. J.,_ as
vilignor- to Thomas A. Edison, Incorporated, West
J., a corporation of New Jersey -
Application May 7, $35, Serial No. 20,126
6 Claims.
(Cl. 274-30)
This invention relates to phonographs, and it and 10' disposed parallel to the shaft 4 and
more particularly to phonographs adapted to supported between the end standards; along
serve both recording and reproducing functions. ' which rods is adapted to slide a carriage I I. On '
the forward part of the carriage H is mounted
While not limited thereto, the invention particu
‘ lariy contemplates business phonographs of the a sound-box l2. which is provided with a trans
type primarily adapted for the recordation and lating system including recording and reproducing
reproduction of dictation.
- '
It is an object of the invention to provide an
improved phonograph readily convertible be
10 tween conditions appropriate to recordation and
reproduction, respectively.
Another object is to safeguard the record and
parts of the phonograph, particularly when the
latter is adjusted for reproduction, against acci
ll dental damage.
‘ Still another object is the provision of an im
proved sound conducting system appropriate to
the convertible nature of the phonograph.
Other and allied objects will more fully appear
20 from the following description and the appended
In the description hereinafter set forth ref
erence is had to the accompanying drawings, in '
Figure 1 is a partial plan view, partly broken
away, of a phonograph according to my inven
tion, the instrument being shown adjusted for
Figure 2 is a vertical cross-sectional view of
30 the same phonograph, taken substantially along
the line 2-4 of Figure 1, but with the instrument
adjusted for reproduction and illustrating partly
in section portions of the carriage and sound box;
Figure 3 is a view of the sound box portion of
the phonograph in ‘the condition of adjustment
last above mentioned, together with an illustra
tion of typical sound-dispersing means.
The general details of the phonograph in which
40 my invention has been illustrated are best seen
in Figures 1 and 2. Herein appears a base I sup
ported on a cabinet C. The base is provided with
suitable end standards, of which the left-hand
one appears in Figure 2 as 2, and with an inter
45 mediate standard 3. 'Journalled in the standard
3 is a mandrel-shaft l, to which is secured a
mandrel 5. The mandrel is adapted to removably
support a cylindrical record blank 6, the latter
being most conveniently hereinafter referred to
60 as a “record," irrespective of the presence or
tools or styli as hereinafter set forth. Ordi
narily the recording tool, neither tool, or the
reproducing tool may be engaged at will with the
surface of the record 6 by adjusting an outwardly
extending lever 15 to predetermined positions
within a slot I6 formed in the top of carriage ll.
These positions may be respectively identified as
recording, neutral and reproducing positions. In
the operation of the phonograph for recordation
upon or reproduction from the record 5, the ap
propriate tool is intended to move longitudinally
of the record while the latter is being rotated;
accordingly the carriage II is appropriately
moved along the rods 10 and 10'. To produce
such movement there is provided a feed screw 11
parallel to the carriage supporting rods Ill and‘
i0’, journalied to the end standards; on this
screw is secured the gear 18 engaging the gear
I‘! secured on' the shaft 4. The feed screw I‘! is
adapted to be engaged by a feed nut 20 supported
by the carriage vl I, during which engagement the
rotation of the feed screw will produce a right
ward movement of the carriage as illustrated in
Figure 1. The design is such that feed nut 20 en
gages the feed screw I‘! ‘at all times when the lever
I5 is adjusted to either recording or reproducing
positions, though when the lever is adjusted to
neutral position the feed nut may be disengaged
from the feed screw by means not necessary to be
shown in these ?gures.
A brief description of some or the parts of the
sound box may be presented as follows:
Two parallel lugs I06 are provided at the front
of the sound box 12, extending downwardly from
the main casing l2’ of the sound box and slightly
spaced on either side of the front and rear center
line of the casing.
These lugs support a hori
zontal pivot pin I01. Outside the lugs are pivoted '
to the pin I01 a pair of arms I08; these arms are
secured to a diaphragm casing I09, which will be
understood to contain a diaphragm (not shown)
suitable for response to and propagation of sound
waves through a ?anged tube I i0 and the neck 2|
hereinafter mentioned. To the diaphragm, in
absence of recorded matter thereon. The shaft
4, with mandrel 5 and record 6, is adapted to be
rotated by suitable means not herein necessary
manner suitable for actuation thereby and not
necessary to describe in detail, is supported a re
to show.
tween the lugs I06 there is pivoted to the pin III'I '
u ’ Further in Figures 1 and 2 will be seen two rods
cording tool mount Iii’ carrying at its lower
extremity the recording tool or stylus iii. Be
a‘ bracket H2, to which there is in turn pivoted
- by a generally vertical pivot stud H3 a circular
weight H4. _ To this weight is intermediately
pivoted an arm H5 carrying at its lower ex
tremlty the reproducing tool or stylus IIB. Dur
ing normal operation of the phonograph for re
producing the diaphragm casing I09 is maintained
in the illustrated position, wherein the recording
tool I H is raised substantially from the surface
of record 6; at the same time the weight H4 is
permitted to ?oat on its double pivotal support
(pin I01 and stud H3) 'and thus to urge down
wardly the arm H5. Under these conditions the
upper extremity of the arm H5 is engaged and
15 supported by the recordingtool mount III’, so
that the ?oating weight II4 causes the reproduc
ing tool H6 to press against the record surface;
vibrations of the tool H6 are transmitted by the
arm H5 to the tool mount III’ and therethrough
20 to the diaphragm. During normal operation of
the phonograph for recording the diaphragm
casing I09 is lowered from the illustrated position
so that the recording tool III bears against the
record surface. This lowers the upper end of
arm H5 and causes the reproducing tool H6 to
rise from the record surface, the ?oating weight
II4 thus being permitted to move toward the
record surface until there contacts with the latter
a smooth, small weight-supporting ball H4” se
30 cured to the bottom of the weight.
The assumption of the diaphragm casing I09
and the weight H4 of the outlined. positions is
normally controlled by two ?ngers I I1 and H8,
respectively adapted to impinge against and raise
a lug I09’ secured to the diaphragm casing I09
and a lug II4’ secured to the weight H4. These
?ngers extend outwardly from the hub assembly
I5” of the lever I5, which hub assembly surrounds
the" lever hub I5’; this hub in turn rotativeiy
40 surrounds a cylinder I I’ which ‘slides along the
rod I0and forms a part of the carriage H. When
the lever I5 is moved to its most forward or re
cording position, both ?ngersJ I1 and H8 assume
low positions, disengaging the respective lugs I03’
45 and I I4’; when the lever is moved to intermedi
ate or neutral position, both the ?ngers H1 and
H8 impinge upon and raise the respective lugs
I09’ and H4’; and when the lever is moved to
its most rearward or reproducing position, ?nger
II‘I maintains lug I03’ raised while ?nger H8
again assumes a low position of disengagement
from lug H4’, as illustrated in Figure 2. The out
lined movements of the ?ngers I I1 and I I8 by the
lever I5 are accomplished by mechanism disposed
within the hub assembly I5" and not herein nec
essary to describe.
Referring to Figure 2 it will be seen that the
sound box I2 is provided with a cylindrical neck
2| through which sound waves pass, in recorda
60 tion to and in reproduction from, lower portions
of the sound box-i. e., in recordation inwardly
and in reproduction outwardly.
mounted with respect to this neck is a coupling
member 22 having a central tubular portion 22’
,- ?tting about the neck 2 I, and having a cylindrical
connecting portion 22" disposed angularly with
use of the phonograph for reproduction, to per
mit the outwardly directed sound waves to pass
from the neck 2|, in precisely the reverse of the
path just mentioned, to the mouth-piece 24; the
mouth-piece then being employed as a sound dis
persing means.
It will be appreciated that in the use of the
phonograph for many purposes, including that
of reproduction of dictation for transcription
thereof, the mouth-piece forms a relatively un
satisfactory sound dispersing means. Accord
ingly one feature of the present invention is an
arrangement whereby a set of ear-phones may,
when desired, be conveniently connected with the.
sound-box I2 in such manner as to receive sub
stantially all the sound waves passing outwardly
through the neck 2|. Such ear-phones and a
?exible sound conducting tube therefor are il
lustrated in Figure 3 at 25 and 26 respectively;
the arrangement for their connection with the 20
sound-box I2, however, is illustrated in detail in
Figure 2.
It will be seen, in Figure 2, that the top of the
connecting portion 22" of the coupling member
22 is provided with a boss 21. Extending through
the boss 21 and in substantial alignment with the
neck 2| is a hole 21’, similar in diameter to the
internal diameter of the neck 2|. Through the
hole 21’ and into the neck 2| may be inserted the
small tubular portion 3|’ of an adapter 3|, this 30'
portion being preferably dimensioned to provide
a good ?t with said hole and neck. The adapter
3| has a larger tubular portion 3|” interiorly
continuous with the smaller portion 3|’, and on
such larger portion is formed a ?uted tube con
nection 33. The top of the larger portion 3|" is
closed, as for example by a knurled screw cap 34.
The tube 26 (seen in Figure 3) , being conveniently
of rubber, is forced on to the connection 33.
Thus when the adapter portion 3|’ is positioned 40
as shown‘in Figure 2 sound waves passing out
wardly through the neck 2| are guided interiorly
of the adapter 3| to the tube connection 33, and
therethrough and through the tube 26 to the ear
phones 25.
The adapter 3| is of course inserted in the i1
lustrated position only when the phonograph is
employed for reproduction, it being obvious that
the portion 3|’ blocks the sound path between
the mouth-piece 24 and the neck 2|. This path 50
is of course automatically cleared by removal of
the adapter, but will then be characterized by
an objectionable sound leakage unless the hole
21’ is closed. Accordingly a cover 28 is provided
for this hole and is biased to a normally closed 55
position. The cover 28 may be pivoted to a short
arm 29, as at 20’, and the arm in turn pivoted
to the boss 21 as by a pin 29'. The closing bias for
the cover is provided by biasing the arm 23, as
illustrated in Figure 2, to clockwise rotation, this 60
being effected by a torsion spring 32 coiled about
the pivot pin 29’ and having terminals respec
tively impinging against the coupling member
portion 22" and hooked about the arm 29. In
Figure 1 the cover 28 is shown in its closed posi 65
respect to the portion 22’ and acoustically con
A signi?cant possibility of damage to the record
nected therewith by virtue of an ori?ce 22"’. To ' during transcribing operations is guarded against
the connecting portion 22" is attached a ?exible by the present invention, namely, the possibility
70 sound conducting tube 23, at the outer extremity of the engagement of the recording stylus with
of which is provided a mouth-piece 24, In re
the record surface, by accidental movementrof
cordation sound is collected by the mouth-piece the lever I5 to its recording position. Such en
24 and passes therefrom through the ?exible tube gagement of the recording stylus, it will be under
23 to the coupling member 22, and therethrough stoodrwould during record rotation be likely to
75 inwardly into the neck 2|. It is possible, in the obliterate matter already recorded on the record
2,1 12,957
and which it may be desired to transcribe. Ac
cordingly the adapter 3|, which is inserted in the
hole 21' in the coupling member 22 when the
phonograph is to be used in connection with
transcription as above described, is provided with
a curved arm I36 extending rearwardly from the
junction of its smaller and larger tubular por
tions 3i’ and 31''.
This arm is intended to ex
tend partially over the slot ii in carriage ii, and
its function is to preclude adjustment of the lever
I! to a position forwardly of the neutral posi
tion-i. e., to prevent adjustment to recording po
sition. There is conveniently provided on the
top of carriage II‘, to one side of the center of
15 slot IS, a vertical member II". The lever I5 is
in its neutral position when parallel with this
member Ii", which therefore serves as a guide
to adjustment of the lever. The end of the rear
wardly extending arm "6 may advantageously be
provided with a slight bifurcation I31 which,
with the adapter properly in place, will engage
the vertical guide member I I". This secures the
adapter 3| against rotation in its mounting and
prevents consequent misalignment of the arm I36
25 with respect to the slot it.’
While I have illustrated and described my in
vention in terms of a particular embodiment
thereof, it will be understood that-thereby I in
tend to impose no unnecessary limitation, but
rather intend to express the scope of my inven
tion by the following claims.
I claim:-—
1. In a phonograph, a sound-box including
means for recording upon and reproducing from
36 a record; a sound collecting device; means con
necting said device with said sound-box and
forming a sound conducting passage therebe
tween; sound dispersing means; and means, con- ’
nected with said dispersing means and remov
40 ably insertable into said passage, for substan
tiaily closing said'passage and providing a sound
conducting passage from said sound-box to said
dispersing means.
mentioned means being connected with said in
clined portion and the other with said sound
conducting member.
3. In a phonograph, a sound-box including
means for recording upon and reproducing from
a record; a sound collecting device; means con
necting said device with said sound-box, forming
a sound conducting passage therebetween, and
intermediately provided with an aperture lead
ing into said passage; sound dispersing means; a 10
sound conducting member connected with said
dispersing means and adapted for insertion
through said aperture and into. said passage to
connect said sound dispersing means with said
sound-box; and aperture closing means biased 16
to close said aperture when said sound conduct
ing member is removed therefrom.
4. In a phonograph, a translating system
adapted for cooperation with a record; means for
adjusting said system selectively for recordation
and reproduction; a sound collecting device‘;
means normally connecting said device with said
translating system; sound dispersing means;
means, connected with said dispersing means
and removably insertable in said connecting
means, for connecting said dispersing means
with said translating system; and means, oper
ative when said adapter is so inserted, for re
stricting the possible operative adjustments of
said translating system.
5. In a phonograph, a sound-box including
means for recording upon and reproducing from
a record; a lever connected with said sound-box
and movable to adjust said sound-box selectively
for recordation and reproduction; a sound col
lecting device; means connecting said device with
said sound-‘box and forming a sound conducting
passage therebetween; sound dispersing means;
an adapter connected with said dispersing means
and removably insertable into said passage for
connecting said sound-box with said dispersing
means; and an arm carried by said adapter and
extending, when said adapter is so inserted, into
2. In a phonograph, a sound-box including
means for recording upon and reproducing from
a record, said sound-box being provided with a
the path of movement of said lever whereby to
restrict the possible movement thereof.
sound conducting neck; a coupling member hav
ing a sound conducting portion inclined to and
opening into said neck, said inclined portion be
ing provided with a hole in alignment with said
neck; a sound conducting member adapted for
insertion through said hole and into substantial
sound collecting device; means operatively con;
necting said device with said translating means;
sound dispersing means; and means, connected
with said dispersing means and removably in
engagement with said neck; and sound collecting
and sound dispersing means, one of said last\
6. In a'phonograph, translating means for re-.
cording upon and reproducing from a record; a
sertable into said connecting means, for connect
ing said translating means with said dispersing
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