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Патент USA US2128645

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Aug- 30, 1938-
2 sheets_sh\ee1I l
Heme/cw f-TMAx GRAMAA/A/
Patented’ Aug. 30, 1938
‘ 2,128,645
Heinrich F. ‘Max- Gramann, Orange, N. J., as
signor .to Thomas A. Edison, Incorporated,
West Orange, N. J., a corporation of New Jer
Application July 18,‘ 1933, Serial No. 680,908
3 vClaims.
(Cl. 274-21)
‘This invention relates ‘to 'phonographs and
more particularly to phonographs of the business
type, commonly called dictating machines. Such
phonographs or dictating machines when de
recorded in these several grooves'will be repro
duced. This forms a convenient method of ‘pick
ing up the train of thought and obviously re
quires less manipulation than is necessary if the
signed for use by a dictator are normally equipped
sound box proper is moved backwardly.
with a suitable reproducing means as well as
ever when the recorded matter of the last few
grooves referred to has been reproduced it is
again necessary to shift'the control lever from
‘the usual recording means. By the inclusion of
this reproducing means, it is possible vfor the
user of such-a machine-to hear all, or a portion
10 of, the material which'has been recorded upon
therecord tablet at any time. It has been com
imon practice to provide a sound box which may
How- \
the reproducing into the recording ‘position be
fore it is possible to proceed with dictation.
The manipulation required ‘both prior to and
subsequent to a reproduction of dictated matter
be conditioned 'for either recording or reproduc
ing by the manipulation of a lever conveniently
placed on the machine. This lever may have‘two
is undesirable in such'machines. Manipulations
automatic to vas great an extent as possible.
The primary object vof ‘my invention therefore <
of this sort do not rapidly become automatic or
instinctive with‘the userand they therefore have .15
or more positions in one of which the sound box > a tendency to distract'and to break into the con
‘is conditioned for recording and in another of centration normally required in dictation; For
this reason it is desirable'to make all operations
which the sound box is conditioned for reproduc
The use of the reproducing mechanism may be
required when a dictator has been interrupted
in the course of dictation. After such an inter
ruption he may shift thecontrol lever to a neu
tral position in which the ‘styli of the sound box
25 do not coact with the'record, move the sound
box .backwardly alongzthe record as far as neces
sary, and then move the control lever into the
reproducing position wherein vmatter previously
recorded will be reproduced as the sound box
30 moves forward up to the position which it oc
cupied prior to the backward movement. When
he has reached the end of the recorded matter
:and is again ready to dictate, it is necessary that
‘he again manipulate the control lever to recondi
35 tion the sound box for recording, whereupon he
may proceed with his dictation.
If it is desired to repeat only the last few words
or portion of a sentence in order to pick up the
train of ‘thought, ‘this may usually be done by
40 shifting the control lever directly from recording
position to reproducing position Without moving
the sound box backwardly along the record. Re
production of the last few words under such cir
cumstances is obtained when the sound box is
is to provide-a business phonograph having a
simple and improved means'by-which thephono
graph may be quickly ‘and veasily shifted from
recording position into ‘reproducing position to
subsequently ‘repeat ‘a portion of previously .25
. dictated matter.
Another object of my-invention'is to ‘provide
a construction by‘ which the‘ above'means may
be readily controlled from a point remote‘ from
the phonograph.
*A further object of my invention is'toprovide
“means for automatically restoring the sound box
to ‘recording position "after the reproduction of
the matter last dictated on the record tablet.
Further objects and features of my invention
will be disclosed in the following speci?cation
. and appended claims.
For a clearer understanding of~my-invention,
attentionis directed to' the drawings accompany
ing'and forming part of this speci?cation, where
Figure l is a front elevation of a phonograph
having a-preferred embodiment of my invention
applied thereto;
advanced over the record tablet by reason of the
Fig. 2 is a top plan ‘view partly broken away,
fact that the reproducing stylus in the sound box
‘of the phonograph of Fig. 1 and includes a sche
is offset a short distance behind the recording
stylus, usually of the order of .1". When the .matic diagram of the electrical circuit for actu
atingand controlling the r'epeatingmechanism;
control mechanism therefore is shifted from
Fig.3 is an elevational view,,partly> in’ section,
recording to reproducing position without move
ment of the sound box relative to the record ,of the carriage and :sound box of the phono
tablet, the reproducing stylus will engage the graph of Fig. 1, seen from the right;
Fig. .4is abottomplan view of the mechanism
record tablet at a point several grooves behind
of Fig.3;
the recording stylus so that as the sound box
vFig. .5,is. a fragmentary view of the sound box
‘.iS advanced along the record tablet the matter
and mechanism on the carriage when the sound
box has been conditioned for reproducing;
Fig. 6 is a rear elevational view, partly broken
away, of the carriage; and
Fig. 7 is a side view of the electro-magnet for
actuating the repeating mechanism.
Referring to the drawings, the phonograph
is moved to inoperative or neutral position and
the feed nut 2i is simultaneously disengaged from
feed screw 20. To accomplish the control of the
sound box, the lever 65 actuates a pair of dogs
‘H and 12 also mounted for rotary motion about
the front guide rod H. The dogs ‘H and "I2 coact
respectively with lifting tabs 48’ on the floating
comprises a mandrel I supported on a shaft 2
weight 48 and 42’ on the casing 42.
journaled in a standard 3 projecting from a base
lever 65 is moved to its forward position in which
the sound box is conditioned for recording, as 10
shown in Fig. 3, both dogs ‘H and 72 are rotated
downwardly until they are entirely clear of the
lifting tabs with which they cooperate so that
both the ?oating weight and said casing are free
to rotate in a clockwise direction. The ?oating
weight will therefore move downwardly until the
advance ball 85 comes into engagement with the
record tablet A. At the same time the casing
42 will likewise rotate downwardly, the stylus
5. The mandrel is adapted to rotatably support
a record tablet A. The mandrel driving means
such as a motor (not shown) is connected to the
mandrel through a belt 8 passing over a pulley
5. A suitable clutch mechanism 9—l0 is provided
for connecting or disconnecting the mandrel
shaft and pulley 5. The base 4 carries two other
standards ‘I! and ‘I’ located near opposite ends
of the base.
These standards support a pair of
guide rods l'l—l8 on which a carriage I3 is
When the
The guide rods are support
ed in the standards by suitable means to prevent
56 and the stirrup 55 passing through the open
ing in the ?oating weight, until the recording
longitudinal movement thereof while permitting
stylus 56 likewise engages the record tablet A.
It will be noted that the advance ball 86 is posi
20 slidably mounted.
free rotation. A feed screw 26 is supported on
a pair of pivots 20' mounted in the standards ‘I
25 and l’. Rotation is imparted to the feed screw
by a gear wheel 22 mounted on the mandrel shaft
and meshing with a gear wheel 23 secured on the
feed screw 26. A feed nut 2!, mounted on a
bracket 85 pivoted on a pin 85' in the carriage
I3, is biased into engagement with the feed screw
26 by a coil spring 86 embracing a pin 81 which
is threaded into the rear portion of the arm I3.
A sound box and the control mechanism there
for are mounted in the carriage and are well
known in the art, being substantially the same
as those described in detail in U. S. Patent No.
tioned slightly in advance of the recording stylus
56 lengthwise of the record tablet so that when
the mandrel is rotated, the recording stylus will
cut a groove in the record material independently
of the ?oating weight, the ?oating weight being
merely carried along supported by sliding contact
of the advance ball and the uncut portion of the
record tablet, in advance of the recording stylus.
The ?oating weight is not used in the operation
of recording and is by this means merely main
tained in a position in which it does not inter
fere with the recording stylus.
When they control lever 65 is moved into its
1,420,316, to N. H. Holland, entitled “Phono
graphs” and issued June 20, 1922. The sound
central or neutral position, both dogs ‘H and 12
box comprises a frame 32 having an upwardly
1.0 extending neck 33 adapted to ?t into an elbow 34
forming the innerend of a speaking tube com
prising a ?exible tube 35. The frame 32 also
carries a downwardly extending lug 39 on which
a casing 42 comprising a sound chamber is pivot
45 ally secured at 40. Connection between the sound
chamber 42 and the neck 33 is made by a sliding
tube 44. Casing 42 is closed by a diaphragm
which carries a stirrup 55 at the lower end of
which a recording stylus 56 is secured.
with their respective lifting tabs 42’ and 48' to
rotate the casing 42 and the ?oating weight 48
upwardly to a ‘position in which both the record
ing and reproducing styli and the advance ball
are entirely clear of the record tablet A. At the
A ?oating weight 48 is likewise pivotally se
cured to the lug 39 and is positioned below the
casing 42. A central hole is provided in the
?oating weight 48 through which the stirrup
55 may pass.
A' reproducing stylus arm 58 car
55 rying a reproducing stylus 59 is pivotally secured
by a pin 66 in a suitable slot in the ?oating weight
48. The end of the arm 58 opposite to that car
rying the reproducing stylus lies at all times
within the stirrup 55. The reproducing stylus
60 '59 is positioned slightly behind the recording
stylus withrelation to the direction of advancing
movement of the carriage. The ?oating weight
48 carries an advance ball 80, preferably made of
sapphire and having a spherical end portion for
coaction with the record, said ball having a di
ameter several times that of the recording or
reproducing styli.
The manual control mechanism for controlling
the sound box at the arm or carriage l3 com
prises. a lever 65 pivotally mounted in the car
riage about the front guide rod IT. The lever
65 has three positions in one of which the sound
box is conditioned for recording, in another of
which the sound box is conditioned for repro
ducing, and in the third of which the sound box
are rotated in a clockwise direction and coact
same time a roller 84’ coacts with the head 84 of
a plunger 8| slidably mounted in the carriage 13. 45
The plunger 8| moves backwardly in engagement
with the bracket 85 and thereby moves said
bracket and the feed nut 2| against the pressure
of the spring 86 to a position in which the feed
nut is clear of the feed screw 20 whereupon the
carriage may be freely slid along the guide rods.
When lever 65 is in any other position than
neutral, roller 84’ is moved out of contact with
the plunger, thus allowing spring 86 to move
feed nut 2! into engagement with feed screw 20.
When the control lever 65 is moved to its rear
or reproducing position the dog 72 is maintained
in its uppermost position in which it holds the
casing 42 adjacent the frame 32. However, the
dog TI is then rotated downwardly and allows
the ?oating weight to move downwardly. Since
the rear portion of the reproducing stylus arm
58 lies at all times within the stirrup 55 which is
held up with the casing 42, the downward motion
of the ?oating weight 48 will impart a counter 65
clockwise rotation to the reproducing stylus arm
56 which will cause the reproducing stylus 59 to
engage the record tablet before the advance ball
86 engages it. By reason of the offset of the
recording and reproducing styli, the reproducing
stylus engages the record behind the recording
stylus relative to the advancing direction of move
ment- of the carriage. Under these conditions the
?oating weight 48 serves to bias the reproducing
stylus 59 into engagement with the record and 75
also serves 'to bias 'the-otherrenfd “of "the ‘repro
‘duc'ingstylus ‘arm '58 into engagement with the
‘bottom of thestirrup 55. If, therefore, a vibra
tory ‘motion is applied to ‘the stylus 59 by ‘the
‘record groove of ‘tablet A when ‘the latter'is ro
tated, such vibratory movement will also be ‘im
;parted-to‘the stirrup 55 and "consequently to the
diaphragm which ‘will emit sounds in the well
known ‘manner. The mechanism ‘by which the
10 prescribed movements of the dogs "H and 1-2 are
obtained as 'a result of movement of the control
'lever'55 ‘is substantially the same as that de
scribed'in'detail in the ‘Holland patent mentioned
above and willnotibe repeated‘herein. All of the
15 mechanism described so fargis well known in the
art and is in common use on commercial pho
nographs intended ‘for manual control.
It will be noted that the only motion required
to change the'sound box from its recording posi~
tion to its reproducing position is ‘the raising of
the casing 42 which disengages the recording
stylus, disengages ‘the advance ball ‘89, and en
gages the reproducing stylus 59. In providing a
remotely controllable mechanism for shifting the
sound box from its recordingrto reproducing posi
tion therefore, anauxiliary lifting dog 95 is piv
otally mounted about the guide rod I'I adjacent
the lifting-dog ‘I2 and is freely rotatable inde
pendently thereof. The lifting dog 95 is provided
I) with a nose 95' for coaction with the lifting tab
42’ on the casing 42. The ‘lifting dog '95 is also
provided with a shoulder to coact with a pin 98
which is secured in a disc 91 mounted for 'free
rotation about the guide rod I'I within a boss I5 of
the carriage I3. A-coil spring I92 connected to
the disc 91 and to the side wall of the boss I5
serves to urge the disc 91 in a counterclockwise
direction when the carriage is viewed from the
right hand side as in Figs. 3 and 5. This tends
to move the pin 98 away from the shoulder on the
lifting dog 95 and to allow the‘latter to fall to
a point in which its nose 9.5’ is entirely below and
clear of the lifting tab 42'. One end of a con
necting rod 99 embraces the pin ‘98 and is free
to rotate thereon. The connecting rod 99 passes
toward the rear of the carriage and is supported
in a'suitably drilled hole in a bracket I99 secured
on the side of the carriage I3'by suitable screws.
The rear end of the connecting rod 99 is adapted
undercertain ‘conditions to contact with a spring
IIlI’ mounted on a rocking member II“. The
rocking member IllI is pinned to a short shaft
193 which is journaled in the bracket ‘I99 and in
the adjacent side wall of the carriage l3 and is
held against longitudinal movement by a pair-of
collars ‘I96 and IE5’ pinned thereon. A cam ‘I I8
'is splined on the ‘back rrod I8 by a pin I8’ and
moves with the carriage by'reason’of ‘its con?ne
ment between the bracket 1109 and the adjacent
60 side wall ‘of the carriage 13. The vcam H8 is
adapted to coact with the rocking member IIlI.
if the back rod I8 is given a ‘clockwise rocking
motion with themachine incondition for record
ing, the cam II‘IIB will contact with :the rocking
arm I91 and will cause it to be rotated forwardly.
As a result of'such rotation ‘the spring 'I9'I’ will
strike the rear end of connecting rod 99 and move
it forwardly. Forward movement'of‘the connect
ing rod '99 causes "the 'pin ~98 "also to be moved
forwardly against the urging of spring I92, to
coact with the shoulder on the lifting dog 95,
thereby turning said dog so that the nose 95'
thereof is raised to coact with the lifting tab» 42'
on the casing 42. The casing 42 is thus rotated
75 upwardly, disengaging the recording stylus and
the advance‘ball from the record tablet and en
gaging the reproducing stylus ‘59, thereby con
ditioning the mechanism for reproduction.
The means which causes the necessary rotation
of the back rod I8 to start the operation just‘de
scribed comprises an electro-magnet IIB having
a core H3 and a U-shaped armature III pivoted
at II2. A link HIS is pivotally mounted on one
side of the armature I I I and'passes upwardly to a
pivotal connection with an arm I'Il secured to
the back rod I8. A simple switch I I5 may be pro
vided at any desired remote point, said switch
being connected in series with conductors H4, a
battery H5’, and the coil of the electro-magnet
‘I Ill. The armature III is normally biased by 15
gravity to its lowermost position as shown in Fig.
7. However when switch I I5 is closed, thuscaus
ing current to flow in the electro-magnet III),
the armature III is attracted upwardly opposite
the core H9 of the electro-magnet and by reason
of its connection through the link H6 and the
arm I II, to the back rod I8, it imparts a rocking
movement to the back rod and thereby conditions
the sound ‘box for reproducing in the manner al
ready described.
I It will be noted that, with the construction al
ready described, as soon as the switch H5 is
opened and the electro-magnet HIl thereby de
energized, the sound box will tend to returnim~
mediately to its recording position by reason of
the movement of pin 98 away from the shoulder
on the lifting dog 95, under the in?uence of the
spring I92. In order to maintain the sound box in
reproducing position the connecting rod 99 is
provided with a notch 99"into which a pawl I I9 16 in
may fall when the connecting rod 99 is moved
forward. The pawl H9 is pivoted on. the bracket
I99 .and is urged into engagement with the ‘con
necting rod 99 by a coil spring H9’ ‘embracing
the pivot screw I2'I onwhic-h the'pawl'is‘mounted. 40
The mechanism ‘described above will'upon clo~
sure of ‘the switch H5 therefore condition the
sound box for reproducing and ‘maintain it "in
reproducing position so ‘that as the carriage is
‘moved forward thematter‘recorded in the space
on ‘the cylinder corresponding ‘to the offset be
tween‘the‘recording stylus‘55 and the reproducing
stylus 59 will'be reproduced. However in order
to make the device entirely automatic‘it is'neces
sary that the sound box be'reconditioned for re
cording whenthe matter ‘recorded has ‘been en~
tirely reproduced. In order to accomplish this
the pawl ‘I I9 ‘is provided with a curved down
wardly extendingiarm I22 terminating in a bent
lug carrying a screw I29. A marker ‘plate I24 is 55
provided adjacent to'the carriage on its advanc
ing side. The marker plate I24 is provided with
an enlarged collar ‘I25 embracing‘the back rod l8
and having an adjustable spring and plunger
mounted in a suitable well 829 therein to provide 60
a'frictional engagement with theback ‘rod. The
marker plate I24is provided with a forwardly ex
tendingportion"l93 ‘for coaction with ‘the screw
I23‘in the lower end of the ‘pawl ‘extension I 22.
The plate I24 is ‘carried along in advance of ‘the
carriage I3 by contact'with'the side wall thereof
duringnormal dictation. The pin I23 is adjusted
so :that, while vthe "plate "I24 ‘is *in'contact "with the
'"adjacent'side wall‘of'theca‘rriage I3, it holds the
pawl extension I22 in a position where the pawl "
I I9 is out of engagement with the connecting rod
99. It will be seen that as long as the plate I24
is in contact with the said side wall of the car
riage I3, the pawl H9 will remain in inoperative
position and will be ineffective for maintaining
the sound box in reproducing condition when it
is moved thereto by forward motion of the con
necting rod 99. Mechanism is therefore provided
to move the marker plate I24 a slight distance in
UK advance of the carriage whenever the sound box
is conditioned for reproducing by actuation of
the control switch H5.
This mechanism com
prises a cup-shaped member E32 embracing the
shaft H33 and extending through an opening in
10 one side wall of carriage I3. The outer end of
the cup-shaped member I32 is partially cut away
to provide a shoulder I33’ which coacts with the
marker plate I24 and thus prevents rotational
movement of the cup-shaped member I32. The
bottom of the shouldered portion I33’ of the cup—
shaped member I32 abuts the marker plate I24.
The marker plate I24 is held against rotary
movement by a shoulder screw I35 which passes
through the marker plate and is threaded into
The cup-shaped member I32
20 the carriage I3.
is provided with a slanting slot I3I with which a
pin I39 secured in the shaft I03 coacts. When
the back rod I8 is rotated causing cam. M3 to
coact with the rocking member IGI and thus move
25 it forwardly and at the same time rock the shaft
M3, the pin #30 will move along the slot I3I and
cause the cup-shaped member I32 to be moved
outwardly thus giving advance spacing movement
to the marker plate I24.
Under these circum
30 stances the pawl III] is free to rotate under the
urging of the spring H9’ and as the connecting
rod 99 is moved forwardly the said pawl drops
into the notch 99’ thus maintaining the sound
box in reproducing condition. The advance spac
ing movement imparted to the marker plate I24
is approximately equal to the offset of the record
ing and reproducing styli.
The operation of the device is as follows: When
it is desired to dictate, the control lever 65 is
40 moved to its forward or dictating position where
in the recording stylus engages the record. When
the mandrel is revolved, the carriage is moved
forward by the cooperation of the feed screw 20
and the feed nut 2| and a groove is cut in the
45 record. If it is desired to repeat the last few
words which have been dictated, the control
switch H5 is closed thus energizing the electro
magnet III} and imparting a rocking movement
to the back rod I8. Such rocking movement of
50 the back rod I8 causes the cam I I8 to be rotated
withdrawing the pawl I I9 from the notch 99' and
allowing the connecting rod 99 to be moved back
wardly by action of the coil spring I02. The
casing 42 will thereupon move downwardly under
the action of gravity and the sound box will Ul
thereby be automatically reconditioned for re
cording. The dictator may then proceed with
his dictation, the only manipulation required of
him in order to repeat the last few dictated words
having been a single momentary closure of the
switch I I5, whereupon as has been described
above, the sound box is conditioned for repro
ducing, and, when the last of the recorded matter
has been reproduced, is automatically recondi
tioned for recording.
Having thus described my invention, I claim:
1. In a phonograph, a sound box movable
with respect to a record tablet and comprising a
recording stylus and a reproducing stylus alter
natively shiftable into record engaging position,
said reproducing stylus being offset to engage the
record at a point rearwardly of said recording
stylus with respect to the forward movement of
the sound box, a manual control on the phono
graph for effecting shifting of said recording 25
stylus into record engaging position, a remote
control and a mechanism operable by said re
mote control independently of said manual con
trol for effecting engagement of said reproduc~
ing stylus with the record tablet for a predeter 30
mined amount of forward movement of said
sound box substantially equal to the amount said
reproducing stylus is offset.
2. In a phonograph, .a sound box comprising a
recording stylus normally biased into record en 35
gaging position and a reproducing stylus normally
out of record engaging position and offset behind
said recording stylus with reference to the normal
direction of movement of said sound box when
recording, means for imparting an advance 40
movement to said sound box with respect to a
record tablet carried by said phonograph, mecha
nism operable at will for effecting shifting of
said recording stylus out of and said reproducing
stylus into record engaging position at any time 45
during an advanced movement of said sound box,
means for maintaining said reproducing stylus in
record engaging position after operation of said
mechanism, and a device movable relatively to
said sound box which when in a certain position
which in turn moves the rocking member IUI for
ward to contact the connecting rod 99 and move
relative to the sound box renders said means in
the dog 95 upwardly, thus raising the casing 42
and conditioning the sound box for reproducing.
3. In a phonograph, a rotatable mandrel
adapted to carry a record tablet, a sound-box as
At the same time the cup-shaped member I32 is
sociated with said tablet and normally condi 55
tioned for recording and comprising a recording
stylus and a reproducing stylus, said reproduc
moved outwardly thus moving the marker plate
A213 to a position slightly in advance of the car
riage and out of contact with the screw I23 on
the pawl extension I22 so that the pawl H9 will
60 fall into the notch 99' in the connecting rod 99
and thus maintain the sound box in the repro
ducing position. When the mandrel is again ro
tated the last few words dictated will be repro
duced by reason of the offset between the re
65 cording and reproducing styli. When the car
riage has moved a distance approximately equal
to the offset between the styli and has repro
duced the last of the recorded matter, the screw
I23 will again contact the marker plate I24 thus
ing stylus being offset behind said recording
stylus with reference to an advancing movement
of said sound-box with respect to said tablet,
means for imparting such an advancing move
ment to said sound box, mechanism, operable by
remote control at any time while said sound-box
is advancing, for conditioning said sound box for
reproducing, a remote control for operating said
mechanism and a device which automatically re
stores said sound-box to recording condition after
a predetermined interval of reproducing.
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