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Патент USA US3031540

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April 24, 1962
R, F, FLEMING
' ‘
3,031,530
SOUND TRANSLATING APPARATUS
Filed June 19, 1959
START ‘STOP
SWITCH /.r
B2
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1
AMPLIFIER
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64'%
I
|
A!"
'7
50
88
1
66’
\ll
‘°
BACK SPACE
SWITCH
I
POWER
58
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l______.____',____1
54
SUPPLY
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5e
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INVENTOR
RONALD
F.
FLEMING
ATTORNEY
United States atent G?iee
1
3,031,530
Ronald F. Fleming, Farmington, Conn., assignor to The
SOUND TRANSLATING APPARATUS
Gray Manufacturing Company, a corporation of Con
3,031,530
Patented Apr. 24, 1962
2
gized. When the pressure roller 30 is lowered into en
gagement with the record disc, the record and its spindle
20 will be rotated to impart rotation to the half-nut 18
through suitable gearing, not shown, causing forward
movement of the carriage 12 with respect to the frame
necticut
10 and with respect to a transducing head 42 having a
Filed June 19, 1959, Ser. No. 821,469
stylus 44 engageable with the record disc.
8 Claims. (Cl. 179—100.1)
A ratchet wheel 46 is secured to the screw 16 for im
parting reverse movement of the carriage relative to the
This invention relates to sound translating apparatus
10 frame under the in?uence of a pawl 48 normally held in
and particularly the circuitry of such apparatus.
retracted position relative to the ratchet wheel by means
The power requirements of sound translating apparatus
of a spring 50 biasing the pawl clockwise, as depicted in
of conventional types frequently vary widely during the
the drawing about its pivot 52. counterclockwise move
performance of the several functions desired in conjunc
ment is imparted to the pawl 48 about its pivot 52 by
tion with such apparatus. For example, when the am
pli?er of such an apparatus is energized during a back 15 means of a backspace electromagnet 54 whose winding
is normally deenergized.
spacing operation or a start-stop operation, the power re
A suitable power supply 56 has an output lead 58 con
quirements are greatly increased. By virtue of the present
nected to the terminal of a movable contact 6% of a back
concept, such extreme load variations are avoided in such
space switch 62. A normally open contact 64 of the
a way that there is never a demand for current by more
backspace switch is connected by means of a lead 66 to
than one of the backspace, start-stop, or ampli?er circuits
the winding of the electromagnet 54 whose other terminal
at any one time.
is grounded. A normally closed contact 68 of the back
It is among the objects of the present invention to
space switch is connected by means of a lead 70 to the
provide in combination with sound translating apparatus
terminal of a movable contact 72 of a start-stop switch
having a frame, a sound translating member, a record
engaging member, a carriage supporting one of the mem 25 74. A normally closed contact 76 of the start-stop switch
is connected to the winding of the electromagnet 40
bers for movement relative to the other, driving means
whose other terminal is grounded. The normally open
for relatively moving the members in a forward direc
contact 78 of the start-stop switch is connected by
tion, backspace means for relatively moving the members
means of a lead 80 to supply power to an ampli?er
in a reverse direction, start-stop means for the driving
means, an ampli?er in circuit with the sound translating 30 82. During a recording operation, the output of the am
pli?er will be connected to the sound translating member
member, and a source of power for the backspace means,
or head 42 by means of a lead 84 and its input will be
the start-stop means and the ampli?er; circuits including
connected to a microphone 86 by means of a lead 88.
the source of power, ampli?er, backspace means, start~
During a reproducing operation, the lead 84- will intercon
stop means and switching means, the switching means
selectively energizing any of the backspace means, start 35 nect the head 42, functioning as a reproducing head, to
the input of the ampli?er whose output will then be con
stop means or ampli?er, exclusively of the others. The
nected by means of the lead 88» to the transducer 86 now
driving means is inactivated during energization of the
serving as a speaker.
.
start-stop means. The switching means preferably com
The start-stop switch 74 and backspace switch 62 con
prises ?rstand second single pole double throw switches,
the ?rst switch having a normally open contact connected 40 stitute a switching assembly 90 which may be remotely
to the backspace means, a movable contact connected to
the source and a normally closed contact connected to a
positioned relative to the remaining portions of the ap-v
paratus, and it will be noted that only four conductors
are required to produce the interconnections necessary
for the several functions contemplated herein. The four
and a normally closed contact connected to the start~ 45 conductors include the lead 58 connecting the power
supply 56 to the terminal of the movable contact 60 of
stop means. Each of the start-stop means and backspace
movable contact of the second switch, the second switch
having a normally open contact connected to the ampli?er
the backspace switch, the lead 66 connecting the winding
‘means preferably includes an electro-magnetic actuator.
of the electromagnet 54 with the normally open contact
The switching means normally connects the source of
64 of the backspace switch, the lead 80 connecting the
power to the start-stop means, actuation of the switching
means to energize the backspace means ?rst deenergizes 50 ampli?er 82 with the normally open contact 78 of the
start-stop switch 74 and the lead 92 connecting the wind
the start-stop means, and actuation of the switching means
to energize the ampli?er ?rst deenergizes the start-stop
means.
ing of the electromagnet 40 with the normally closed con
tact 76 of the start-stop switch.
With the switches in the positions depicted in the
A more complete understanding of the invention will
follow a description with respect to the accompanying 65 drawing, the pressure roller 30 will be elevated in a
non-driving relationship with respect to the record disc
drawing which assumes the form of a schematic and
24 because the winding of the electromagnet 40 is en
fragmentary diagram.
9
ergized from the power supply 56 through the lead 58,
The sound translating apparatus has a frame 10 sup
movable contact 60, normally closed contact 68, lead 70,
porting a carriage 12 movable in a slot 14 with respect
to a screw 16 engaging a half-nut 18 in driving relation 60 movable contact 72, normally closed contact 76, lead 92,
to the winding and to ground. Assuming that it is de
ship with a spindle 20 terminating in a ?uted upper end
sired to begin a recording or reproducing operation, the
22 for registry with the serrated central opening of a
movable contact 72 of the start-stop switch will be
record disc 24. Rotation of the record disc is effected
shifted from its normally closed contact 716 to its nor
through a driving shaft 26 whose driving roller 28' is dis
posed below the record disc for engagement with its lower 65 mally open contact 78, deenergizing the winding of the
electromagnet 40 whereby the spring 36 will effect en
surface. A pressure roller 30 carried by a shaft 32
gagement between the pressure roller 30 and the record
mounted on a lever 34 is biased towards the record disc
24 to produce rotation of the record disc 24 by means
by means of a spring 36 tending to move the lever 34
of the driving roller 28 carried by the driving shaft 26.
clockwise about its pivot 38, as viewed in the drawing.
Following deenergization of the electromagnet 40, the
In the drawing, the pressure roller 30 is shown in its re
tracted position relative to the driving roller 28 under the 70 ampli?er 82 will be energized through the normally open
in?uence of the electromagnet 40 whose circuit is ener
contact 78 and lead 80, at which time the ampli?er will
3,031,530
4
3
be the only load connected to the power supply 56. Re—,
gardless of the position of the movable contact 72, of the
start-stop switch 74, when the movable contact 601 of the
backspace switch 62 is shifted from its normally closed
contact 68 to its normally open contact 64, the start~stop
having a terminal, said ?rst contact means being selec
tively engageable with said start-stop and ampli?er ter
minals, and second contact means connected to said
power supply terminal and being selectively engageable
with said backspace and ?rst contact means terminals,
switch will be completely deenergized and subsequently,
whereby said switching means selectively energizes any
the only load connected with the power supply will be
of said backspace means, start-stop means or ampli?er,
the winding of the backspace electromagnet 54-. It will
exclusively of the others to limit the drain on said source
be noted that when the electromagnet 54 is energized, the
of power.
pawl 48 will be rocked counterclockwise about its pivot 10
2. The invention as set forth in claim 1 wherein said
driving means is inactivated during energization of said
52 to engage the ratchet wheel 46 and rotate the screw
16 to impart a backspacing movement to the carriage 12..
start-stop means.
During this backspacing operation which may consist of
3. The invention as set forth in claim 1 wherein said
switching means comprises ?rst and second single pole
one or more impulses to effect the desired degree of
backspacing, the record disc 24 will be moving under the
in?uence of the driving shaft 26 because the winding of
electromagnet 40 is deenergized and the pressure roller
60 will engage the record disc 24 under these conditions.
By thus imparting rotation to the record disc during the
backspacing operation, registry of the stylus 44 with the
double throw switches, said ?rst switch having a nor
mally open contact connected to said backspace means,
a movable contact connected to said source and a nor
mally closed contact connected to a movable contact
of said second switch, said second switch having a nor
mally open contact connected to said ampli?er and a
normally closed contact connected to said start-stop
The backspace electromagnet, the start-stop electro
magnet, and the ampli?er are preferably designed to
4. The invention as set forth in claim 1 wherein said
have substantially equal current requirements, and since
start-stop means includes an electromagnetic actuator.
only one of these will be energized at any given time, 25
5. The invention as set forth in. claim 1 wherein said
groove or track will be greatly facilitated.
means.
the power supply will be susceptible to very ei?cient
operation at a substantially constant load.
The foregoing description will suggest a number of
backspace means includes an electromagnetic actuator.
6. The invention as set forth in claim 1 wherein said
switching means normally connects said source of power
modi?cations to those skilled in the art and contem
plated by the appended claims.
I claim:
1. In combination with sound translating apparatus
having a frame, a sound translating member, a record
_
to said start-stop means.
30
7. The invention as set forth in claim 6 wherein actu
ation of said switching means to energize said backspace
means ?rst deenergizes said start-stop means.
8. The invention as set forth in claim 6 wherein actu
ation of said switching means to energize said ampli?er
engaging member, a carriage supporting one of said
members for movement relative to the other, driving 35 ?rst deenergizes said start-stop means.
means for relatively moving said members in a forward
direction, backspace means for relatively moving said
members in a reverse direction, start-stop means for said
driving means, an ampli?er in circuit with said sound
translating member, and a source of power for said back
space means, said start-stop means and said ampli?er;
switching means including terminals connected in circuit
with said source of power, ampli?er, backspace means
and start-stop means respectively; ?rst contact means
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,348,204
2,660,623
2,673,242
2,882,346
Brubaker ____________ __. May 9, 1944
Somers _____________ __ Nov. 24, 1953
Deventer ___________ __ Mar. 23, 1954
Jones _______________ __ Apr. 14, 1959
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