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Jan. 3, 1950
c. B. DALE
Filed'marcn 51, 1947
2 Sheets-Sheet 1
Jan. 3, 1950
c. B. DALE
Filed March 31, 1947
2 Sheets-Sheet 2
(if A?!"
/24 A26
Patented Jan. 3, 1950
2,493,657 '
UNITED STATES- PA'rsN'r orrlca
Colin B. Dale, Oak Park, Ill., assignor to Webster
Chicago Corporation, Chicago, Ill.,-a corpora
tion of Illinois
Original application March 10, 1947,
733,654. Divided and this application March
31, 1947, Serial No. 738,436
This invention relates to a spool on which wire
‘ of a relatively ?ne gauge is adapted to be wound,
the spool. thereby causing the successive layers
of wire to be wound evenly thereon. During the
rewind operation the wire is fed tautly and evenly
back onto the supply spool, and as the operation
nears completion, the end of the wire slips loose
operation, is held in place so as to restrain the
from the latching means. under tension. to pro
wire against unwinding movement from the spool.
duce a ?nal tightening and automatic clamping
It is designed with particular reference to a
of the wire on the spool. Thus, the wire becomes
‘ sound recording and reproducing machine utiliz
?rmly bound on the spool and cannot unwind.
ing a magnetizable steel wire, such an instrument 10 Moreover, the free end of the wire tends to twist
being commonly known as a “wire recorder.” A
into a “pigtail" as it is pulled loose from the latch.
main problem to be dealt with in any such in
making it impossible for the wire end to become
strument is the securement of the ends of the
buried in the wire on the spool.
wire lengthsthat are wound upon its spools. By
In the accompanying drawings. a suggestive
my invention this is accomplished in a simple and
of this invention is set forth in the
effective way which may readily be mastered by
manner following:
and particularly to the method of winding the
wire onto the spool whereby the free end portion
of the v‘wire, at the conclusion of the winding
anyone. The features of improvement herein
claimed have been fully disclosed in my applica
tion for patent on a Wire recorder, ?led March
Figure 1 is a perspective view of a wire recorder
constructed in accordance with and embodying
the principles of my invention;
10, 1947 under Serial No. 733.654, of which this 20 Fig. 2 is a top view of a portion of the recorder
case is a division.
illustrating the layout of the wire handling
A primary object is to eliminate various incon
venient and annoying characteristics of the wire
Fig. 3 is a vertical section looking in the direc
handling devices of prior wire recorders. One of
tion of the arrows on line 3-1 of Fig. 2; and
the disadvantages of such“ instruments has been
Fig. 4 is a vertical section on line 4-4 of Fig. 2.
the necessity of attaching an end of the wire to a
In the illustrated embodiment of the inven
“leader" consisting of a serrated Celluloid strip
tion, the wire recorder and reproducer is housed
or the like wrapped around the wire on the supply
in a carrying‘case 24 having a detachable lid 22.
' spool and fitted tightly between the ?anges of the
spool for holding the wire in place. When using 30 Inside the lid there is provided a compartment
normally closed by a hinged partition 24 (shown
the wire in the recorder, such a leader is ?rst
in open position) for storing the electric power
unwound from the supply spool and wound onto
cord 26. microphone 20 and microphone cable II
the takeup spool, successive layers of wire then
when. the recorder is not in use. The lid 22 is
being wound around the leader on the takeup
spool‘ in the course of operation of the machine. 35 also equipped with a number of spool holders 8!‘
for carrying the wire spools 34.
Unavoidable projections on the leader'have caused
The iront portion of the recorder is covered by
uneven winding of the wire with the production of
a decorative panel or escutcheon it. The
“bumpy” spots therein, and this has resulted in
escutcheon is suitably apertured for access to an
over, if the leader should accldently be broken on’, 40 input socket (not shown) , in which the plug ll of
the microphone cable 3.. is adapted to be inserted
the spool of wire is rendered incapable of further
when the instrument is being used for recording.
use. In other types of machines adhesive fasten
and an output socket 4| for establishing connec
ers have been used to secure the wire end to the
tion to a remote ‘loudspeaker or headphones.
takeup spool, but such expedients have been sub
Ject to the disadvantage that they produce un 45 Various control knobs project outwardly of the
evenness in the superposed layers of the wire.
panel it, including the record-listen switch knob
My present invention avoids the foregoing
42, a knob 44 on the output tap switch, a volume
di?lculties by providing a novel wire handling
potentiometer knob 46 and an on-oii-tone control
knob u.
mechanism adapted to utilize the wire without a
leader or equivalent device, and without resorting 50 A cover 5., Figs. 1 and 2, extends over the rear
to the use of adhesive fasteners for attaching the
portion of the instrument and is suitably recessed
wire end to the takeup spool. The leading end of
to accommodate a wire supply spool 34, the wire
> distortion of the sound when reproduced. More
the'wire is merely clamped to the take'up spool by
takeup spool‘ 82 and the recording and pickup
head I4, which is also part of the level winder.
as not to obstruct the smooth winding surface of so The handle It of a control lever It extends tor
a convenient latching means which is located so
ing or clamping ?nger I28 which bears on the
upper surface of the cover 122.
wardly of the front edge of the cover 53. The
control lever 58 is part of the run-stop-rewind
switch which, however, forms no part of the"
82 which support the wire handling means and
associated mechanism.
The ?nger I28 is formed on the end of an arm
I33 which is mounted on the under side of the
cover I22 radially thereof, the ?nger I28 being
extended upwardly through an aperture in the
present invention. The framework of the ma
chine includes a base plate 88 and a sub-base plate i
cover. Upward pressure is exerted on the arm
I38 by a compression spring I32 disposed around
I >
The wire supply spool 34 that is to be used in
a headed pin I34 that extends through the cover
the machine is mounted on a chuck 88 (see F18‘.
I22 and the arm I38 to depend therebelow. The
4) carried by a vertical shaft 82 that is journaled
arm I38 pivots about a fulcrum point I35 so that
in self-aligning bearings 84 carried by the plates
the spring I32 is effective to urge the ?nger I28
88 and 82. An adjusting screw 88 at'the base
downwardly against the plate I22. A button I38
of the shaft 82 enables the height of the chuck
on the end of the arm I38 projects through a
88 to' be regulated. A disc 8'I-of anti-friction
central opening in the cover I22. The latch ?nger
material such as Bakelite, is interposed between 15 I28 israised by depressing the button I38. ‘With
the screw 88 and the end of the shaft 32 to
release of pressure on this button, the wire W
afford a thrust bearing for the shaft.
is then clamped ?rmly to the cover or face I22 of
The chuck 88 has a dependent
the takeup spool 52 under pressure of the spring
88 that is concentric with the shaft 82. A motor
I32 acting upon the finger I28. ‘
driven friction wheel (not shown) may be em 20 The recording and pickup head 54 is carried
ployed torotate the chuck through frictional en
on the upper end of a slide bar I38 that extends
gagement with its drum 88. ‘ ‘
vertically through apertures in the base plates
The hub 83 of the chuck 88 (see Fig. 4) is re
lieved as indicated at 94 around the upper edge
88 and 82. A'lug I48 struck out from the slide
bar vI38 has a tapped opening into which a screw
of its periphery, the amount of such relief at any 25 I42 is threaded, the upper end of the screw pass
point on the hub being such as to conform sub
stantially with an arc struck from a point'dia
ing freely through a clearance opening in a
member I44 slidably supported on the bar I38.
metrically opposite on the hub in the plane of
,The screw I42 is headed at its upper end, and a
the annular surface that contacts the lower face
coil» spring ‘I48 is disposed around the screw I42
of the spool 34. A radial slot 88 is formed in the 30 between the lug I48~and- the member I44. The
hub 83 to accommodate a small steel ball 83 and
‘screw I42 affords a means of adjusting the rela
a coil spring I88 which urges the ball 88 toward
tive positions of the-member I44 and the bar I38.
the periphery ofrthe hub 83 against the inner
A tension spring I48 is extended between the '
cylindrical surface of the supply spool 34.v A
member I44 and thebase plate 82 to urge the
cover plate I82 is attached to the hub 83 by. a 35 lower portion of the member I44 against the
central screw I84 threaded into a tapped opening
end of a rocker I58 pivoted at I5I on a bracket
extending into the shaft 82 axially thereof.- The
I52 extending upwardly from the base plate 82.
cover I82 ‘and the outer lipof the slot '88 serve
A stub shaft I54 supported by the bracket I52
to retain the ball 88 in the.chuck,88 when the
carries a worm wheel I58 and a cam I58. The
supply spool 34 is removed.-
The. arrangement just described facilitates the ‘
insertion and removalv of the wire supply spools, ‘
, worm wheel I58 cooperates with a; worm thread
as 34, since it is’ not necessary to accurately align _
I88 formed on the shaft I88 of'the takeup spool
52. The cam I58 cooperates with a cam follower
I82 on the rocker I58. Rotation of. the shaft I88,
the opening through the spool with the hub 53 . therefore, is effective through the medium of the
nor to assemble the spool on the hub in a par 45 cam I58 and rocker I58 to produce alternate -
ticular angular relation. The friction catch or
detent comprising the ball 88 and the spring I88
serves to retain the spool 34 securely on the chuck
upward and downward motion of the head 54 in
timed relation with the rotation of the takeup '
spool 52.
'The head 54 houses the coils for recording
The wire takeup spool 52 is secured ‘on the 50 sound magnetically on the wire W and for picking ' 3
‘up the acoustic signal from the wire, depending
upon whether the instrument is being operated
upper end of a vertical shaft I88 iournaled in
self-aligning bearings I88 in the base plates 88
and 82. The lower end of the shaft I88 rests on
a disc I88 of anti-friction material which serves
as a thrust hearing. The spool 52 has a depend
ing skirtor drum "-8 horizontally aligned with
a friction wheel (not shown) that functions as ‘
an idler between the shaft of a driving motor
to record or reproduce the sound. The head 54
also contains an erasing coil for demagnetizing
the wire to. clear it of any previous recording
when‘ the instrument is being operated for re
cording purposes, as is familiar to those skilled
in the art. .Inasmuch as these portions of the‘
(not shown) and the takeup spool 52. Because
of the relatively large diameter of the drum II8 60 apparatus are “conventional, ‘a detailed descrip
tion thereof is- not included herein. A notch I84
the takeup spool 52 is rotated rather slowly when
is provided in the head 54 for the reception of the
it is being driven by the motor, the wire speed
wire W.’ A guide ?nger I88 mounted on the cover .7
under these conditions being about one-seventh
58 adjacent the supply spool 34, and a small post
of thelwire speed when the chuck 88 is being
pin I88 extending up from the cover 58 inter
driven from the same motor.
mediate the head 54 and' the takeup spool 52,
A circular cover plate I22 (see Fig. 3) on the .
assist in guiding the wire between the spools and
takeup spool 52 has a peripheral portion which
the recordingv head 54'.
forms the upper flange of the spool. A small slot
The control lever 58 is part of a three-position or notch I24 is formed in the edge of the cover
I22, and ears I28 are bent upwardly fromv the 70 control switch that governs operation of the
machine. The handle 58 of the control lever is
shown in its neutral or stop position in Fig. 2.
The “run” position of the handle 58 is to the left
vled from the'supply spool 34 passes partially
of neutral, while the “rewind” position is to the
around the recording head 54 and then under
one of the ears I28 for insertion beneath a latch‘ 75 right as viewed in this ?gure.
edges of the slot on either side thereof, as shown
in Fig. 3. The leading end of a wire W which is
When the control handle 58 is in "run" posi
tion, during which time the machine may be
utilized either for recordingror play-back depend
ing upon the setting of the selector knob 42, the
driving force of the motor is applied to the take
up spool 52. When the control handle 56 is in
"rewind" position, the driving force of the motor
is then applied to the chuck 80 carrying the wire
supply spool. In the neutral position of the con
trol handle 5. the motor is uncoupled from both
the chuck II and the takeup spool 52. Between
the spools 52 and 34 and the motor suitable driv
ing connections, not a part of this invention, are
operatively arranged.
buried in the wire on the spool 34, so that it can
be readily located and grasped when the spool
is to be played back.
It is obvious that various changes may be made
in the speci?c ement set forth for purposes
of illustration without departing from the prin
ciples of the invention. The invention is accord
inglv not to be limi
to the precise details dis
closed herein but includes all modi?cations
thereof within the spirit and scope of the ap
pended claims.
I claim:'
1. In a wire recorder including a wire supply
spool and a wire takeup spool, the method of
When a new wire supply spool is placed in the 15 rewinding wire from the takeup spool onto the
machine, the leading end of the wire W is drawn
supply spool which comprises, maintaining the
on’ the supply spool 34 (see Fig. 2) and carried
wire under tension while it is being rewound,
past the recording and reproducing head 54 to be
attached by the latch I28 to the takeup spool 52.
It is preferable to manipulate the takeup spool 52 by hand for bringing the head 56 into its ex
treme upper position before the wire W is at
tached to the spool 52, inasmuch as the wire com
mences to wind from the top down on the spool
52. The selector knob 42 is adjusted as desired
for recording or listening. The wire feed is in
guiding the wire onto the supply SW01 ‘to form
layers thereof on said spool, and momentarily
checking the motion oi’ a predetermined final
length of the wire as it is drawn oif of the taixeup
spool, while continuing the motion of the supply
spool, thereby to tighten the wire on the supply
2. In a wire recorder including a wire supply
spool and a wire takeup spool, the method of re
winding wire from the takeup spool onto the sup
itiated by throwing the control handle 58 into
running position at the left of neutral. The wire
ply spool which comprises, retarding the takeup
is wound evenly in uniform layers on the takeup 30 spool to maintain the wire taut as it is being re
spool 52 as the operation progresses. The wire
wound, imparting oscillatory movement to the
feed may be started, stopped, and reversed as
wire transversely of its length as it passes onto the
often as desired by manipulation of the control
supply spool thereby to form layers of the wire on
handle 56, the various working parts being auto
said spool, abruptly checking the motion of a pre
matically adjusted to each new condition. Re
determined ?nal length of the wire momentarily
versal of the wire feed is accomplished by mov
as the end of the wire leaves the takeup spool,
ing the control handle to “rewind” position.
while continuing the motion of the supply spool,
To rewind the wire W the control handle 56 is
whereby certain of the turns 01' wire on the supply
thrown to rewind position to the right of neutral
spool preceding said final length of wire are forced
and maintained there until all of the wire is 40 radially inwardly of the spool between other
drawn back onto the supply spool 34. The re
turns of wire to bind the wire on the spool, and
winding operation takes place very rapidly, and
deforming the end of the wire as it leaves the
as the last of the wire is withdrawn from the
takeup spool.
takeup spool 52, the wire end is pulled free of the
latch I28. The tug of the latch In on the wire 45
produces a ?nal tightening of the wire and a
forcing inwardly of a portion of its outer coil
The following references are of record in the
between other coils on the supply spool 34,
die of this patent:
whereby the wire at a point proximate to its pro
jection from the spool is held securely against un 50
winding. The remaining length of wire then is
drawn onto the spool 34 where it wraps around
Roseau ___________ __ Aug. 9, 1904
the ?nal layer. The end of the wire, as it slips
Poulsen et al _______ __ May 9, 1905
away from the latch I28, is curled into a pigtail
Preissner _________ __ Aug. 6, 1918
which prevents the end from accidently being
Klappenecker ..... -_ Feb. 9, 1932
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