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Патент USA US2130336

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Sept. 20, 1938.
|'=. BONN
_
2,130,336
RECORDING DEVICE FOR TELEPHONE‘ SETS
Filed D80. 5, 1936
5 7535 513130
-
M
l
I
76
2 Sheets-Sheet l
Sept. 20, 1938. '
F.-BONN
2,130,336
RECORDING DEVICE FOR TELEPHONE SETS
Filed Dec. 5, 1936
2 Sheets-Sheet 2
Patented Sept. 20, 1938
_ 2,130,336
UNITED ‘STATES PATENT OFFICE
2,130,336
.
RECORDING DEVICE FOR TELEPHONE SETS
Friedrich Bonn, Surth, near Cologne, Germany
Application December 5, 1936, Serial No. 114,299
In Germany August 2, 1935
2 Claim.
(01. 234-3335)
This invention relates to a device which is in
tended to be used in combination with auto
before the dial has returned to normal and inde
pendent
matic telephone sets having impulse transmitters normal. of the power which returns the dial to
of‘the dial type, for automatically'recording the
It will be understood that in this case it is not
5 numbers or digits which have been set, by means
necessaryto derive the power required for the
of a mechanism which is mounted on the base‘ printing from the return-spring but the mo
of the telephone set on top of the rotary ?nger mentum
ofreturning masses in which previously
dial and coupled with the dial.
energy had been stored may be utilized for the
The devices hitherto suggested for this purpose,
10 and having a recording device mounted beside or
Theduration oi’ the individual telephone calls 10
beneath the set are not su?iciently reliable in may
be recorded on the recording paper strip in
commercial use and, so far as I have observed, a simple manner by causing the paper strip with
partly require constructional changes in the tele
the aid of a clock-work to move at a‘ constant;.
phone sets and therefore do not meet the practical speed
independently from the printing action past
printing.
15 requirements.
the following detailed description should be read
in connection with the acco panying drawings
'
inwhich
operating the dial plate and very complicated
Fig. 2 is a side elevation of the set shown in
the type printing device within the rotary casing
in a stationary position, covering the rotatable
dial of the telephone set. Moreover, the printing
Fig. 1;
30 tion. Hence the driving power of the spring
mechanism which has to accelerate the whole ro
tating unit and at the same time has to actuate '
has to be relatively great.
of course, this is a
disadvantage of the known apparatus.
It is the object of the invention to obviate these
drawbacks of the known recording devices. To
this end, a numeral type wheel is connected to
the shaft on which the additional dial is mount
ed, in such manner that it participates in the
45 rotation of the shaft as the additional dial is
wound up, while the numeral type wheel is locked
by a mechanism when the dial starts turning
back and is released by the mechanism for re
turning into its normal position ,shortly before
the dial has reached normal position and after
the dialednumber or digit has been printed on
the recording strip.
.
Hence, my new device has a stationary rather
than a rotating casing and moreover it 'e?ects
55 the printing at a later instant, namely shortly
25
Fig. 3 is a longitudinal section of the record
ing device on line 3-3 in Fig. 1;
Fig. 4 shows, in larger scaleand in front ele
vation, the printing device in its normal position;
Fig. 5 shows the same front elevation,‘shortly 30
of the numbers which have been set has to be
effected while the dial returns to its normal posi
able masses which are rather considerable and
20
ing to the invention;
constructional means are required for supporting
furthermore for winding up the spring mechanism
-
Fig. 1 is a front elevation of a telephone set,
having mounted on it a recording device accord
much as the whole casing has to be turned when
the printing device, must be rather considerable.
Consequently the operating force which ‘in the
$5 setting operation serves for accelerating the mov
' ‘
For a complete understanding of my invention
However, this device is also unsatisfactory inas
25
’
in use.
been dialed is accommodated in a casing which
is arranged co-axially to the dial of the telephone
set.
_
a recording stylus or pencil as long as the set is
According to one known construction, the
mechanism for recording the numbers which have
20
_
prior to the releasing of the printing device;
Fig. 6 shows diagrammatically the arrange
ment of the paper strip in the printing device,
and the devicev for marking the duration of the
calls; and
_
_
35
Fig. 7 shows the ribbon guides and the device
for moving the ribbon.
The recording device is enclosed in a casing
76 which may be fastened to the supporting plate
2 by any suitable means not shown in detail, since 40
such attaching means are immaterial so far as
the present invention is concerned.- The plate
2 is attached to the telephone set by means of
a clamping frame I which corresponds in its form
to the shape of the base of the telephone set.
45
By means of a wall or partition 3 the casing
76 is divided into two superposed compartments
A and B. Rotatably mounted in the partition 3
-is the center or main shaft l0 carrying at its in
ward end a lever 9 o?'set away from wall 3 so 60
that by means of its projecting ?nger or stud
H it engages the O-hole of the dial 8 of the tele
phone set. The outwardly projecting end of the
shaft l0 has ?xed to it the dial l2. Hence the
two dials l2 and 8 are mechanically coupled with 65
2
9,180,888
one another. This dial I2 is under the in?uence \tion, a shifting mechanism is provided for the
of a torsion spring l2‘ housed in the protruding driving roller 54. To this end bell crank it has
central portion l2b of casing 18 and connected I pivotally mounted at the end of its arm“ a pawl
between a fixed point 16' of casing .18 and shaft “3 58, which coacts with the ratchet teeth 6.0 pro
N. This spring, while not absolutely necessary vided on the rim of the driving roller 54 and
for the operation of the device (which could be moves these teeth 80 in a clockwise direction a
operated alone by the telephone dial spring, not step su?icient so that the numerals of the dialed
shown here), is advisable to use as an auxiliary,
so as not to overload the telephone dial spring.
Mounted on the shaft Hi, within the compart
10
ment B, is the control disc I! having a partially
curved recess l4 and a release pin l5 (Fig. 4).
The control disc i3 is shown in its normal posi
tion and the straight edge of its recess l4 engages
the projecting portion ll of the bell crank it
which is pivotally mounted at Ma and acted upon
by the spring I817. The free end I! of bell crank
20
25
30
35
l8 swings in the path of movement of the arm 2|
of a release lever 20 pivotally mounted at 20' and
under the in?uence of a spring 20'’. Another
branch '22 of the lever 20 lies in the path of
movement of the pin l5. Secured to bell crank
ii at 23 is the printing member or type lever 24
having-a little hammer 25 of rubber placed oppo
sitely to a number type wheel 26 presenting the
numerals l, 2, 3, etc. In one rotational direc
tion the number type roller 26 is positively cou
pled with the dial-carrying shaft l0 and thus
with the dial H, by means of the gears 28, 29 and
30 while in the opposite rotational direction. a
resilient coupling such as torsion spring .25" is
interposed between the ‘toothed wheel 20 and
the numeral type wheel 25 thus permitting the
dial i2 to return to normal although the numeral
type wheel 26 is prevented from rotating. To
this end a locking mechanism is provided con
sisting of a ratchet wheel 3| having ratchet teeth
32 and being rigidly connected to the number type
wheel 26. and a pawl 33 which is pivotally mount
40 ed on the lever 25.
Under the action of the ten
sion spring 35, one end of which is fast to the
arm 2! of the lever 20 and the other end of which
is fast to the pawl 38, the pawl 33 having at its
free end a tooth 31 adapted for engagement with
45 the ratchet wheel 3| is held against a stop 38
of lever 25.
Rotatably mounted on the stud 4? is the paper
drum 46. Under the action of the driving roller
54 having a roughened or toothed surface fric
50
tionally engaging the paper strip, the strip 58 is
unwound from the roller lit), thence it runs over
the guiding members 49, 50, 5!, 52, 53 and is
call number are typed with the proper ‘spacing in
a successive order on the paper strip so as to be
p 10
easily readable (Figs. 4 and 5).
The paper strip 48 is besides continuously
moved for the duration of a call, in order to
record the duration of the call by means of a
clock-work of any suitable conventional construc
tion (not shown) which is accommodated in the
compartment A. This clockwork may be of any
well known type and therefore is not speci?cally
illustrated in the drawings. The clock-work
drives the driving roller 54 so as to wind up the
paper strip on the winding roller 55. The paper 20
feed or drive by means of this clock-work is au
tomatically started when the subscriber lifts the
receiver-from its forked cradle 'Il through the
medium of the arm 18 fastened to the cradle
and engaging, with its forked end 19 the pivoted 25
lever 42 which in turn, with its pin 6i may engage
any suitable element of the clock-work by which
it is arrested when the receiver is hung up while
it is released when lifting the receiver. These
auxiliary features are not shown in the drawings 30
since they are immaterial for the present inven
tion and its understanding.
,
The mechanism for recording on the paper
strip the start and end of a call consists of a lever
38 (Fig. 6) pivoted at 39 and held against the pin 35
H of the lever 42, under the action of the spring
All. The lever 42 is connected with the cradle 11,
in the manner described above. When the re
ceiver is hung up, the lever 42 is so positioned
that the pin iii is in a position above the nose 43 40
of the lever 38. When the receiver is lifted, the
lever 132 moves into- the position indicated in
dotted lines in Fig. 6, i. e., beneath the nose 43.
By this movement the pin tl presses against the
nose 53 and causes the lever 38 to swing in coun 45
ter-ciockwise direction and to engage the angle
piece (it which is disposed underneath the type
roller 25 the free end of the angle piece extend
ing underneath and parallel to paper strip 48.
The corresponding portion of the type roller 26 50
has been out off in the drawings to show the
angle piece M. In the free portion of the angle
wound up on the winding drum 55. The winding ‘ piece M is a small hole or recess (not shown) en~
gaged by the pin 55 when it is actuated. The
drum 55 is mounted on the plate 55 which is slid
paper strip GE! passes between the angle piece 44 55
able
in
the
direction
indicated
by
the
arrow
and
55
acted upon by a spring 56n in such manner that and the pin 135, and each time the receiver is lifted
drum 55 is resiliently held against the driven ' and hung up and the lever 62 swings in counter
roller 54 and paper strip 48 lying on it, thus the clockwise direction, the pin 45 makes a small hole
paper strip 48 is prevented from slipping on the or depression in the paper strip. It will be un
derstood that a writing pen or- pencil may also 60
60 roller 54 and at the same time the roller 55 is be used instead of the pin 45.
a
driven in the winding direction. It will be under
The endless typewriter ribbon 52 (Fig. 7) runs
stood that the roller 55 including its slidable
over the ribbon roller 63. the guides 54, 65, 56 and
direction of the arrow, for accommodating the 51 and round the type wheel 26. By the resilient
member 68 connected with the guide 61 the rib 65
65 distance between the centers of the rollers 54 and bon 52 is held under slight tension. It will be
55 to the amount of paper wound up on the roller
55. Furthermore, by means of the upwardly bent understood that any other suitable means may be
free end 51 of the plate 55 it is possible to move used for feeding the printing-ink to the type
the roller 55 back from the driving roller 54 as wheel such as an ink roller.
The ribbon 62 is moved by means of the pawl 70
70 indicated by the arrow in order to render it possi- - 59 pivoted under spring action on the lever 10.
‘ ble to take the roller 55 with the paper reel off
The lever 10 with its free end ‘ll engages the re
‘ from the plate 55 (Fig. 6).
In order that the printed numerals of thecall cess or notch of the disc 12 ?xed on the dial‘
number or digit may be typed with the proper carrying shaft l0. Now, when the disc 12 is
75
75 spacing on the paper strip in the dialing opera } turned in the direction of the arrow in the
mounting plate 55 is gradually displaced in the
_
engages the teeth ‘M oi’ the ribbon. roller 68
and moves the roller 63 including the ribbon 62.
In order to render it possible to make any ad=
ditional notes by hand on the portion of the
paper strip carrying the respective recorded call
number, an aperture ‘I5 is provided in the top wall
portion of the casing, ‘above the paper guide ii.
'10
3
9,180,386
setting operation, the free end ‘Ii of the lever
it which is pivoted at 12 is lifted. the pawl 89
The operation of the device is as follows: .
In the normal position the parts of the mech
anism are in the position shown in Fig. 4. Now,
when lifting the receiver, the lever 42- moves from
the position shown in full lines in Fig. 4 into the
15 position shown in dotted lines, whereby the clock
work for the paper feeding mechanism is released
by means of the pin 8! and permitted to operate.v
Simultaneously the lever 38 is swung and pro
duces a perforation on the paper strip 48.
The setting of the numbers is now effected by
20
means of the supplemental ?nger hold dial i2
operated in the conventional manner to operate
the conventional dial 8. The rotary movement
of the dial i2 is transferred to the dial 8 of the
25 telephone set by the dial-carrying shaft l6 and
the lever 9. By the train of gears 28, 29, 30 the
type wheel 25 is rotated accordingly in the di
rection indicated by the arrow in Fig. 4 so that
the number or digit of the type wheel 26 corre
30 sponding with the dialed character stands oppo
site to the hammer 25 when each single dialing
operation is ?nished.
In the dialing operation the disc I3 is turned
in the direction indicated by the arrow in Fig. 4.
35 The projection ll of the lever l6 thereby slides
along on the incline of the recess N and the le
ver I6 is lifted on its fulcrum_l6a into the po-_
sition Fig. 5, thus tensioning the helical spring
No. The pawl 59 thereby rotates the paper driv
40 ing roller 54 through a predetermined angle.
Due to the rotary'movement of the disc IS the
pin i5 disengages the lever 20 so that the latter
is swlmg round its fulcrum 20a under the in
'?uence of spring 20b in a clockwise direction and
45 thereby its free end 2! is moved into the return
path of hell crank arm l9 as shown in Fig. 5.
Simultaneously the pawl 33 is also swung clock
wise and its locking tooth 31 engages the ratchet
teeth 32 of. the wheel 3| and thereby prevents
50 this wheel from rotating clockwise.
‘Now, when- the ?nger of the operator disen
gages the dial l2, it returns to normal in the
usual manner under the action ‘of spring l2“.
The parts It, 20, 33’ andthe type wheel 26 on
55 the other hand are kept in their displaced posi
tion shown in Fig. 5, up to a predetermined instant
shortly before the dial l2 has reached normal and
when disc i3 is about to arrive, clockwise turning,
in the position shown in Fig. 4. At this instant,
60 which is shown in Fig. 5, the pin l5 contacts the
lever arm 22 and lifts it into the position Fig. 4,
thus releasing arm IQ of bell crank l6 and allow
ing its detent II to snap into cam recess ll un
der the action of the spring liib. The hammer
25 is thereby impelled against the type lying in
front of it and the respective type is printed
on the paper strip 48 by the medium of the rib
bon 62. When this operation is ?nished, lever
22 rises slightly higher so that, as shown in Fig.
70 4, pawl 31 becomes disengaged from ratchet
wheel 3| and the latter together with type wheel
65
26 return to normal under the action of the
coupling or torsion spring 26“.
I
so that the numbers or digits are successively
typed or printed on the paper strip. When the
receiver is hung up, the ‘lever 42 is moved‘ back
into its normal position and acts again upon
the lever 38 which in consequence thereof again 5
presses or prints a mark into or onto the paper
strip. Simultaneously the spring-actuated mem
ber 6i locks the clock-work so that the movement
of the paper strip 48 is stopped. From the two
marks made on the paper strip 48 by the lever 10
38 the duration of the call may be computed
corresponding to the speed of the paper strip,
while the printed number indicates the subscriber
with whom the call was made. The incoming
calls are also recorded, at least as to their dura 15
tion, as the lever 88 is operated each time the
receiver is lifted or hung up. False recording or
falsi?cations are prevented because the real '
printing is e?'ected only shortly before the dial
returns to normal.
For the same reason, the
power required for the printing action is mate
rially reduced.
It will be understood that various modifications
20'
in the constructional form of my device can be
made in accordance with the diiferent shapes 25
of telephone sets, without departing from the
scope of my invention.
Having now described my invention, what I
claim is:
I. In a call recording device directly attach
able to automatic telephone sets, a stationary
casing containing the recording device and,at
tachable to the selector base of the telephone to
cover its conventional selector disc, said record
ing device having an operating shaft and a vis 35
ible recorder selector disc mounted thereon and
having call characters similar to those arranged
on the conventional disc, means for coupling said
recorder selector disc with the telephone selector
disc, a type wheel carrying call numeral units
corresponding to those on said selector discs,
gearing between said type wheel and said shaft
to positively rotate said type wheel into dialing
position the same relative extent as the selector
discs when the latter are moved into a dialing
position, means for arresting said type wheel in
dialed position to permit the latter to return alone
to normal position and means .tending to return
the type wheel to normal position, a cam ,ele
ment on said shaft for controlling said arresting
means to arrest the type wheel'and hold it in
arrested position while the selector discs return
to normal position and to release the type wheel
shortly before the discs have arrived in normal
position, a printing hammer cooperating with said 55
type wheel to print the dialed character, and
means, controlled by said arresting means, for
releasing said printing hammer shortly before
said type wheel is released to return to normal
position.
- 2. In a call recording device directly attachable
to automatic telephone sets, a stationary casing
containing the recording device and attachable
to the selector base of the telephone to cover its
conventional selector‘ disc, said recording device
having an operating shaft and a visible recorder
selector disc mounted thereon and having call
characters similar to those arranged on the con
ventional disc, means for coupling said recorder
selector disc with the telephone selector disc, a. 70
type wheel carrying call numeral units corre
sponding to those on said selector discs, gearing
between said type wheel and said shaft to posi
The same cycle or sequence of operations will tively rotate said type wheel into dialing position
75 be repeated with every single dialing operation the same relative extent as the selector discs when 76
4
s,1so,sse
the latter are moved into a dialing position,
means for arresting said type wheel in dialed posi
tion to permit the latter- to return alone to normal
position but tending to return the type wheel to
normal position, a cam element on said shaft
for controlling said arresting means to arrest the
type wheel and hold it in arrested position while
the selector discs return to normal position and
to release the type wheel shortly before the discs
have arrived in normal position, a spring oper
ated printing hammer arranged in cooperative
relation with said type wheel, a second cam de
vice on said shaft for moving said printing ham
mer into operative position ready for printing
when said discs are moved into a selecting posi
tion, means controlled by said type wheel arrest
ing means for arresting said printing hammer in
said operative position while said dials return to
normal position and for releasing said hammer
i'or actuation against the type wheel shortly be
fore said type wheel is released to return to nor
mal position.
10
FRIEDRICH BONN.
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