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Патент USA US2107988

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Feb. 8, 1938.
L. KARDORFF
IMPULSE TRANSMITTER
Filed Sept. 27, 1935
?g. I.
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‘ ‘2,107,988
Patented Feb. 8, 1938
I ' 2,107,988
UNITED STATES PATENT OFFICE
25107.988
IMPULSE TRAN SMITTEB.
Léon Kardol'?, Brussels, Belgium, asslgnor m In
ventor Trust S. A., Luxemburg, Luxemburg
Application September 2%, 1935, Serial No. 42,406
In France October 12, 1934
(Cl. 179-90)
On the other hand, the pro?le of the moving
This invention relates to an impulse transmit
7 Claims.
ting device to be used more particularly in the
automatic telephone systems and comprising
member is such that its portion which coincides
with the transmission of ten impulses, has its
various points progressively displaced relatively
means permitting to send out groups of prede
5 termined impulses.
Most of the apparatus of the above kind are
provided with code controller discs having a cer
tain number of teeth which are grouped together
and which cooperate with electric contacts.
10 Such apparatus require the use of discs having
a relatively large diameter in view of the fact
that the discs should be provided along their pe
riphery with the number of teeth which is neces
to each other.
The moving member has no in?uence upon
the transmission of impulses except on a portion
of its pro?le and this portion may vary. The
length of this portion is determined-by the posi
tion of a. feeler which cooperates with a code 10
member.
Use is made preferably as a moving member
of a rotating member effecting a complete rev
olution for each of the digits of the number
which is to be formed.
sary for producing generally at least six or seven
15 series of ten impulses, separated by hollows cor
However, use may be made of a moving mem
responding to the periods of rest.
In order to avoid the above drawback it has
ber having a profile consisting of several identi
cal shapes, of which one complete shape is used
been proposed among others to use apparatus
capable of transmitting a large series of impulses
of which a few only are really transmitted by
20
means of code controller discs which short-cir
cuit certain impulses in order to compose the de
sired series.
In these devices, the members which emit the
for each digit which is to be formed. In this
case the moving member will effect for each digit
a fraction only of a revolution. The moving
member may be a cylinder, or a cam, etc. It
may form an element independent of the make
and break device acting upon the contacts of im
pulses or it may act itself as a make and break 25
device.
An alternating motion or an oscillating motion
may be imparted to the feeler. The latter is dis
'_ impulses and those which effect the short-cir
cuits must operate in perfect agreement with
each other. As however, one revolution of the
code controller disc corresponds to about a hun
dred revolutions of the transmitting member, the
code controller discs should be made with great
precision, and this can be obtained with di?iculty
only in the practice; their manufacture and
‘more particularly their ?tting makes them very
placed towards the code members which may be
costly and fragile.
The code members may be arranged on a plate
or on a ring or they may be distributed in groups
upon several ?ttings. The latter may be ?xed
either parts of a circle or sectors, or rectilineal
toothed members or cam members and may act
0
along their height and not along their length, as
was hitherto the case.
,
The present invention does away with the
above drawbacks and allows of obtaining a device
for transmitting impulses which has smaller di~ or they may be displaced by saccades underneath
mensions, whilst reducing to a large extent the the feeler.
'
~
precision required in the manufacture.
In order to make the invention well under
The apparatus for transmitting impulses ac stood, an example of its carrying into effect 40
cording to the present invention is characterized will be given hereinafter, which is more particu—
in that the formation of the impulses, trans
larly applicable to the automatic telephone sys
mitted by any suitable device, is- in?uenced by terns.
a movable member having a pro?le or outline,
Figs. 1 to 4 relate to an impulse transmitter
the motion of the movable member being such
that after a pro?le has acted to form a series
for predetermined calls.
of impulses, the movable member is placed again
the axis of an impulse transmitter comprising
in a position similar to that at the beginning, for
the formation of a new series of impulses.
a rotating member having the shape of a cylin
der and acting also as a make and break device
The moving member'is constructed so as to
have a pro?le consisting of one shape or of
several identical shapes, the length of each shape
being such as to correspond for a given speed to
the duration of ten impulses followed by a cer
55 tain period of rest.
‘
Figure 1 is a horizontal section made along
with contacts of impulses.
.
Figure 2 is a vertical section made along the
line X—-X of Figure 1.
Figure 3 is a development of the rotating cyl
'
inder.
‘
55
2
2,107,988
Figure 4 is a section along the plane Z-Z of
Figure 3.
Figure 5 shows
, movable member having a
pro?le with two identical shapes.
Figures 1 to 4 show an impulse transmitter in
which the movable member consists of a rotat
ing cylinder acting as a make and break device
coacting with contacts of impulses. The said
movable member effects a complete revolution
for each ?gure of the number to be formed.
5|] are maintained inside supports 8| which are
integral with the outer cylinder I. Impulse con
tacts 52 and 53 are mounted on a support 54
(Fig. 2) which is integral with the member 29.
The device is completed by a speed regulator and
by starting and stopping means, not shown in‘
the drawings.
The apparatus works as follows:
When a number is to connected, the corre
sponding name marked on the cylinder I
is 1O
The apparatus comprises a cylinder I adapted
brought opposite the pointer 4 by rotating the
to rotate around its axis and on which are placed _ cylinder. This rotation brings the correspond
the names corresponding to predetermined num
ing code-member 50 within reach of the feeler 49.
The cylinder l rotates
When the cylinder I has occupied the desired
15 between a rear plate 2 and a front plate 3, the
hers of telephone calls.
position, a pressure is exerted on the handle I6,
which has for its effect to tension the spring
latter being provided with a pointer 4 opposite
which may be brought any of the names marked
along the generating lines of the cylinder I.
Between the plates 2 and 3 is ?tted, along the
20 axis of the apparatus. a shaft 5 which carries
toothed wheels 6 and 1 which gear respectively
with other toothed wheels 8 and 9, the wheel 8
being secured upon an intermediary shaft l0
whilst the wheel 8 is integral with a sleeve H
capable of rotating freely around the shaft ID.
The wheel 8 is integral with a ratchet wheel
l2 coacting with a pawl l3 which is integral with
a box l4 containing a spring l5 secured on the
one hand to the box and on the other hand to
30 the shaft l0.
At the end of the shaft I0 is ar
ranged a, handle [6 adapted to place the spring
l5 under tension.
On the other hand, the sleeve 1 l adapted to
rotate freely around the shaft [0 is integral with
a toothed wheel I‘! gearing with another toothed
wheel I 8 mounted at the end of a sleeve l9 adapt
ed to rotate freely around the shaft 5 and integral
with a movable member 20 having the shape of
a cylinder and provided at its periphery with ten
40 teeth 2| made of an insulating material and an
gularly displaced relatively to each other and
spaced by intervals 22 (see Fig. 3). A portion
23 without teeth connects the tenth tooth to the
?rst tooth.
The cylinder 20 comprises also a path 25 hav
45
ing a certain number of horizontal portions 2‘
connected with each other by means of inclined
planes 21 (Fig. 3). The path 25 acts as a guide
to an arm 28 carried by a member 29 adapted
50 to slide along an axis 30 secured to the rear
plate 2. The member 29 is connected by means
of arms 3| to a sliding block 32 which may be
displaced along an axis 33 parallel to theaxis
20 and also mounted on the rear plate 2. The
55 member 29 and the sliding block 32 are subjected
to the action of springs 34 and 35.
Along the arms 3| are adapted to slide two
supporting members 36 made integral with one
another by means of a connecting piece 31 en
gaging between the arms ll of a double fork 22
(see Fig. 2) of which the other end is provided
with arms 40 coacting with a projection 41 in
tegral with a sleeve 42 mounted on a fixed shaft
43. The sleeve 42, and therefore the projection
4|, are capable of an angular displacement
around the shaft 41, due to the action of an
arm 44, the end 45_ of which bears against a cam
48 mounted on the shaft 5. The said cam has
a certain number of straight portions 41 con
70 nected with each other by means of inclined
planes» 48.
One of the supporting members 24 carries a
feeler 49 coacting with code members ‘I having
the shape of toothed blades arranged around
75 the movable member 2|. The said oode members
l5. Whilst the pressure is exerted, the pawl
l3 slides on the ratchet wheel 12. When the
handle 16 has been released, the spring l5 which
expands, carries with it the box [4 in a move
20
ment of rotation and the pawl I3 presses the
ratchet wheel [2 and the toothed wheel 8 which
is integral with it, thus causing a motion of the
toothed wheel 6 and consequently of the shaft
5 and cam 46.
On the other hand, the toothed wheel 1 causes
a rotation of the cylinder 20 which may be made
of an insulating material, through the inter
mediary of the toothed wheels 9, l1 and II. The
rotation of the cylinder or movable member 20 30
has for its effect to free the arm 28 which at rest
is situated upon the highest portion of the path
25. Under the effect of. the springs 34 and 35
the feeler 49 rests against the ?rst tooth of the
code-member chosen. The height of the teeth 35
of the code members 50 is such that the feeler
49 allows the impulse contacts 52 and 53 to be
in?uenced only by a given number of teeth of the
movable member 20 corresponding to the num
ber which‘is to be formed. As soon as the teeth 40.
of the movable member act upon the impulse con
tacts, the arm 26 rests_ upon the path 25 and
follows the horizontal portions 28 and the in
clined portions 21 of the path until it is brought
back to the starting position.
45
Whilst the movable member 20 has e?ected a
complete revolution, the cam 46 has been dis
placed through a fraction of a revolution only.
The end 45 of thevarm 44 has followed the hori
zontal portion 41 and the inclined plane 48 and 50
is brought to the next horizontal portion. The
displacement of the arm 44 acts through the
projection 4| .upon the fork 30 which displaces
the supports II by sliding them along the arms
il. The feeler 49 comes thus opposite the next
tooth of the code member ‘I and the device‘
works in a similar manner for the next revolu
tions of the movable member 24.
It is obvious that the modes of construction
shown in the accompanying drawing have been
given only by way of example. Concerning more
particularly the movable member which effects a
complete stroke for each digit to be formed, it is
clear that use may be made of other devices, for
instance of a rack or other member having an
alternating motion.
On the other hand. it is powble by means of
a few small modi?cations, to interchange the
movable members shown by way of example in 70
the mode of construction, or even to make them
rotate in a direction opposite to that shown in
the drawingifthespacecomprisedbetweentne
first and the last horisontal portion has
made inclined.
.
3
2,107,988
What I claim is:
1. An impulse transmitter comprising in com
bination a cam-like member of invariable pro?le
moving continuously and in such a manner that
ta its position is analogous for the same digit of
each group of impulses, means coacting with the
cam-like member for producing impulses, code
members corresponding to a given number of
groups of impulses, and a feeler moving with an
ing motion imparted by the cam-like member and
having a stroke which is limited by the code
member so as to vary the number of impulses of
each group, as set forth.
5. An impulse transmitter comprising in com
bination a cam-like member of invariable pro?le
moving continuously and in such a manner that
its position is analogous for the same digit of
alternating motion imparted by the cam-like
each group of impulses, means coacting with the
cam-like member for producing impulses, code 10
member and having a stroke which is limited by
the code-member so as to vary the number of
impulses of each group, as set forth.
'2. An impulse transmitter comprising in com
members arranged around the same axis as the
cam-like member, said code-members corre
sponding to a given number of groups of im
pulses and a feeler moving with an alter
15 bination a. cam-like member of spiral-shaped
pro?le mo ng continuously and in such a man
ner that its position is analogous for the same
nating motion imparted by the cam-like mem
ber and having a stroke which is limited by the
10
digit of each group of impulses, means coacting
with the cam-like member for producing im
20 pulses, code-members corresponding to a given
number of groups of impulses, and a ieeler mov
ing with an alternating motion imparted by the
cam-like member and having a stroke which is
limited by the code-member so as to vary the
number of impulses of each group, as set forth.
3. An impulse transmitter comprising in com
bination a cam-like member of cylindrical shape
the side surface of which is cut in a stepped way
approximately along a helix, moving continuous
30 ly and in such a manner that its position is anal
ogous for the same digit of each group 0
im
pulses, means coacting with the cam-like mem
ber for producing impulses, code-members cor
responding to a given number of groups of im
pulses. and a feeler moving with an alternating
motion imparted by the cam-like member and
having a stroke which is limited by the code
member so as to vary the number of impulses of
40
each "group, as set forth.
4. An impulse transmitter comprising. in com
bination a cam-like member having an invariable
pro?le with teeth, said cam-like member moving
continuously and in such a manner that its po
sition is analogous for the same digit of each
45 group of impulses, contacts acted upon by the
said teeth for producing impulses, code-members
corresponding to a given number of groups of
impulses, and a feeler moving with an alternat
code-member so as to vary the number of im
pulses of each group, as set forth.
6. An impulse transmitter comprising in com
bination a cam-like member of invariable pro 20
?le moving continuously and in such a manner
that its position is analogous for the same digit
of each group of impulses, means coacting with
the cam-like member for producing impulses,
code-members corresponding to a given number 25
of groups of impulses, a feeler moving with an
alternating motion imparted by the cam-like
member and having a stroke which is limited by
the code-member so as to vary the number of
impulses of each group, and means for varying 30'
the number of rotations of the cam-like member,
as set forth.
7. An impulse transmitter comprising in com
bination a rotating cylinder with a name index
marked on its outer surface and containing a 35
cam-like member of invariable pro?le moving
continuously and in such a manner that its po
sition is analogous for the same digit of each
group of impulses, means coacting with the cam
like member for producing impulses, code-mem
bers driven by the said rotating cylinder and cor
responding to a given number of groups of im
pulses, and a feeler moving with an alternating
motion imparted by the cam_-like member and
having a stroke which is limited by the code (5
member so as to vary the number of impulses of
each group, as set forth.
,
LEON KARDORFF.
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