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Патент USA US2130931

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Sept. 20, 1938.
>
A. RYSICK
=
2,130,931
DRIVE FOR RECORDING AND REPRODUCING_DEV_ICES
Original Filed March 7, 1935
2 Sheets-Sheet 1
7/‘? var? fan.
Sept. 20, 1938.
2,130,931
A. RYSICK
DRIVE FOR RECORDING AND REPRODUCINGDEVICES
Original Filed March 7, 1935
75
2
(1%.
Q
2 Sheets-Sheet 2
*A
\
Patented Sept. 20, 1938
2,130,931
UNITED. STATES’
PATENT OFFICEv
2,130,931
DRIVE FOR RECORDING AND REPRODUC
ING DEVICES
Arno Rysick, Dresden, Germany
Application March 7, 1935, Serial No. 9,811. Re
newed May 20, 1937. In Germany March 2,
1934
7 Claims.
This invention relates to driving means for the
turntable of plate or disc recording and/or re
producing devices.
'
One object of the invention resides in the pro
‘ vision of new and improved means of the char-.
acter described, which shall be economical of
manufacture, compact; and effective to drive the
turntable of a dictating or like machine at any
10
one of a plurality of different speeds.
-
Yet another object of the invention consists in
the provision of driving means of the character
described, which may be readily manipulated to
produce a wide range of. operating speeds of the
turntable from. a single constant speed of the
15 driving means, the speeds of the turntable being
arranged to be accelerated or decelerated in mi
((71. 74-190)
also embraced by a bow II disposed on the plate
5. The plate 5 has also a projection I2 similar
to the projection I3 arranged on the opposite end
of the plate 6. Between the two projections I2,
I3 a tension spring “is ?xed which has the Ol
tendency to draw the displaceable plate 6 into
its highest end position.
The plate 6 constitutes the engageable and dis
engageable carrier for the transmission gears. and
for this purpose is provided with a bearing bolt 10
I5 which, directly above the plate 6, supports a
friction disc I6 connected with a superposed fric
tion disc I‘! of smaller diameter. Above the fric
tion disc I'l_ the journal or bolt I5 carries an e1
bow lever I8 provided at its angular end with
a journal or bearing pin I9 for a third-friction
disc 20 ofmedium diameter and articulated at
its free end to a control lever 23 by means of
_
in the following description of a preferred em- . the hinge pin 2| and the drawbar 22. The con
20 bodiment of the invention which has been se-.. trol lever 23 is arranged on a pivot 24 which is
lected for illustration in the accompanying draw
disposed outside the range of the turntable in
ings. It will be understood however that many the frame of the device. In Fig. 1 one end posi
changes in form, construction and arrangement, tion of the control lever 23 is shown at which
may be made ‘by those'vskilled in the ‘art,_ without the friction disc 20 engages directly between the
25 departingirom the scope and spirit of the inven— friction disc 2 arranged on the motor shaft I and 25
tion as expressed in the appended claims.
the driving edge 3 of the turntable. As indicated
In the accompanying drawings:
in the drawings, at this position, the other fric
Figure l is a plan view of a driving means em
tion discs I6, I‘! will not contact with the driv
I bodying a preferred form of the invention, the ing edge 3 or the friction disc 2 on the motor
nute or relatively great increments.
Other objects and advantages will be apparent
30 turntable being partially broken away to better
illustrate the driving means.
Fig. 2, a similar view as that shown in Fig. l,
but with the driving members differently ad
I
Justed;
35
Fig. 3, a side view of the driving members; and
a Fig. 4, a view of the drive in disengaged posi
on.
A prime mover, preferably an electric motor
(not shown) is arranged to drive a shaft I, the
, upper end of which is provided with a plurality of
stepped driving cones 2. The depending ?ange
3 of the turntable joumaled on a vertical axis
A is shown in vertical elevation in Fig. 3 and in
plane cross-sectional views‘ in each of Figs. 1, 2
.H and 4. It will be understood that the disc-sup
porting surface of the turntable is coincident with
the plane de?ned by the upper edge of the flange
3, as shown in Fig. 3.
"
To the frame 4, shown inv Fig. '3, of the motor,
. not shown, a plate 5 is secured forming the car
rier for the entire switching arrangement. This
base plate_5 carries a set screw ‘I on which an
other plate 6 is guided by means of the slot 8.
The plate 6 further possesses a lengthening piece
9 which at its front end carries a roll I0 and is
shaft I. In Fig. 2, the other end position of the 30
control lever 23 is shown, at which the friction
disc 20 arranged on the bell crank I8 is indicated
- only by dots and dashes to improve the view.
At this position of the parts, the plate 6 has been
farther drawn up by the spring I II. The bell
crank I8 has been swung about the pin I5 to
render motion of the carrier 6 impossible. The
parts are then in the position at which the largest
friction disc I6 engages the driving wheel 2
whereas the friction disc I‘! ?rmly connected with 40
the friction disc I6 hugs‘the edge 3 of the turn
table. Transmission is effected from the motor
shaft to the driving edge 3 of the turntable by
means of the wheels 2, I6, I1.
At the position of parts according to Fig. 1 the
turntable will have a speed of approximately 78
revolutions, which corresponds to gramophone
speed, so that discs on which sound has been
recorded at this speed by a suitable device can
be instantly reproduced by a gramophone.
50
At the position of parts according to Fig. 2 the
turntable has a slower speed amounting approxi
mately to only 33 revolutions and being suited
only for dictating machines for taking as much
dictation as possible on each plate.“ slight regu 55
2
2,180,981
lations of the speed are possible by axially dis
placing on the motor shaft the driving wheel
with, and arranged to be rotated by, said ?rst
mentioned wheel and to drivingly engage the
The engagement of the
friction wheels will always be maintained, as the
?ange on said disc, a friction wheel journaled
on said lever eccentrically of the lever. axis and
adapted to simultaneously engage both the prime
mover and disc ?ange in one position of said
lever, means to actuate said lever, and means to
actuate said carrier.
. 2 formed as a cone.
spring It takes care that the friction discs are
properly pressed in between the motor shaft and
the driving edge.
'
'
The switching device is used also .as starting
2' and stopping device for the machine by having
10 a. control lever 26 movably arranged on a. pin
25 in the machine frame. The control lever 26
3. In a drive of the character described, the
combination of a prime mover, a, rotatably sup
10
ported disc, a carrier member slidably mounted in
is pwitioned with its front end in a guide 21 underlying relation with respect to said disc and
which ?xes the end positions of the control lever in close proximity thereto, a plurality of fric
26. On another pin 28 arranged in the machine tion wheels journaled on a. ?xed axis on said
16 frame an adjusting lever 29 is provided which member for joint rotation in» planes parallel to 15
with its front sloping end is placed on the guide the plane of saidv disc and intermediate the disc
roll l0 disposed on the plate 6. The lever 29 and carrier member, a lever pivoted on said fric
is articulated to the control lever 26 by means tion wheel axis, a friction wheel journaled on
of a drawbar 30. The control lever 28 projects said lever for rotation in a plane parallel to the
from the casing of the device and can be brought \ plane of said disc, at depending ?ange on said 20
into one or the other end position. At the posi
disc, means to move said carrier member into
tion of the control lever 26 shown in Figs. land 2 and out of position to cause said plurality of
the adjusting lever 29 is so high up that the wheels to provide a driving engagement between
friction wheels are in engagement with the edge said prime mover and the ?ange on said disc,
of the turntable and the motor shaft, so that and means-to move said lever to cause the wheel
transmission of motion from the driving motor _ thereon‘ to form a driving engagement between a
said prime mover and said ?ange when said car
to theturntable is possible. On the other hand,
if the control lever 28' is brought into the posi
tion according to Fig. 4, the adjusting lever 29
rier is out of position with respect to said plu
rality of wheels.
will be moved so as to press with its front end
upon the guide roll l0 and thus push the car
4. In a drive of the character described, the
combination of a prime mover, a rotatably sup
rier G for the friction wheels i6, i1, 20 into low
ermost position to bring it out of engagement
ported disc, alcarrier member slidably mounted
with respect to said disc and in close proximity
thereto, a plurality of friction wheels journaled
with the turntable as well as with the friction
cone 2 on the motor shaft i. Transmission of
on a. ?xed axis on said member for joint rotation 35
motion is thereby interrupted and the turntable
in planes parallel to the plane of said disc, a lever
stopped. It is immaterial whether the control
lever 23 is in the position according to Fig. 1 or
2, that is, whether the one group of friction
40 ‘wheels is in operative position or the other fric
tion disc. Starting and stopping by means of‘
the lever 26 is possible without any trouble, as
pivoted on said carrier, a friction wheel journaled
on said lever for rotation in a plane parallel to
all the control parts are articulated to one an
other and capable. of cooperating in any motion.
The invention is not'limited to the embodi
45
ment shown, but may be carried out in other
ways.
For example, the displaceable - carrier
could carry several sets of friction wheels which
alternatively become operative, so that the tum
table can rotate at more than two speeds.
I‘ claim:
.
1. A drive-for a recording and reproducinggde
vice for plates or discs, comprising a casing, a
turntable in said casing, a driving edge on the
55 circumference of theturntable, a driving motor
in said casing, a movable carrier displaceably dis
posed on said casing, a bearing pin on said car
rier, ‘a lever pivoted on said bearing pin, _a pair
of friction wheels ‘journaled on said bearing pin
the plane of said disc, 2. ?ange on‘ said disc,
means to move said carrier member into and out
of position to cause said, plurality of wheels to
provide a. driving engagement between said prime
, rier.
5. In a drive of the character described, the
combination of a prime mover, rotatably sup
ported disc, a ?ange on said disc, 2. carrier mem
ber slidably mounted with respect to said disc 50
and in close proximity thereto, a plurality of fric
tion wheelsjoumalled on a ?xed axis on said
member for joint rotation in planes parallel to the
plane of said disc, yieldable means tending to
slide said carrier member in a direction to pro
vide a driving connection between said‘plurality
of wheels, said prime mover. and‘ the ?ange on
said disc, a lever pivoted on said carrier, a fric
tion wheel journalled on said lever for rotation
lever, said carrier being movable into and- out of
~position-"to establish a driving connection fromv
means to move said carrler'in a direction reverse
65 effective to move the wheel thereon into and out
of position to establish a driving connection from
said motor to the said edge of the turntable.
2. In a drive of the character described, the
40
mover and the ?ange on said disc, and means to
move said lever to cause the wheel thereon to
form a driving engagement between said prime
mover and said ?ange in one position of said car 45.
and a friction wheel journaled on said movable
said motor through said pair of wheels’ to the
driving edge of said turntable, said lever being
30
in a plane parallel to the plane of said disc, 60.
vto that in which the carrier is moved by said
yieldable' means to disengage the driving con
nection between said prime vmover and said disc
and means to rotate said lever to form a driving
connection between said prime mover, the wheels
on said lever and said disc. I
'
combination of a prime mover, a rotatably sup-"
6. In a drive of the character described, the
70 ported disc having a depending ?ange. a carrier combination of a prime mover, a. rotatably sup 70
member slidably mounted in underlying relation ported disc, a carrier member slidable between
with respect to'said disc, a lever journaled on two positions, a plurality of friction wheels jour- said carrier,’ a ‘friction 'wheel on said carrier co
nailed on a. fixed axis on said member for joint
axial with saidplever and adapted to engage said
prime mover, a second‘ friction’ wheel coaxial
rotation in ‘planes parallel to the plane of said
disc, a‘?ange on said disc, a lever pivoted on said 76 -
3 .
carrier, a friction wheel iournalled on said lever
for rotation in a. plane parallel tovthe plane of
said disc, means tending to move said carrier
into one or‘ its said positions to cause said plurality
two spaced positions, yieldable means tending to
move said carrier to one of said positions, a plu
rality of friction wheels journalled on said mem
her and operable in the position to which said
of wheels to provide a_ driving engagement be
yieldable means tends‘ to move said member to
tween said prime mover and theilange on saidv provide a driving connection between said prime
disc, manual means to‘ move said carrier to the _ mover and said disc, a friction wheel movably sup
second of the said positions to disable the driving
on said carrier member for rotation on
connection between said prime mover. said plu ported
an axis extending parallel to the rotary axes of
10 rality oi wheels and said disc, and means to actu
said plurality of friction wheels, means to move
ate said lever to cause the wheel thereon-to form said carrier to the second of its positons in which 10
a driving engagement between said prime mover said
plurality of wheels are disabled from driv
and said ?ange when said carrier occupies a po
ing connection between said prime mover and
sition identified with the disabled condition of said disc, and means to move said last mentioned
said plurality of wheels.
friction wheel bodily when said carrier occupies
7. In a drive of the character described, the said last mentioned position to provide a driv 15,
combination of a prime mover, a rotatably sup
connection between said prime mover, said
ported disc, a carrier member slidably supported ing
last mentioned friction wheel and said disc.
with respect to said disc in close proximity there
20 to, said carrier member being movable between
mo nrsrcx.
20
'
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