US1800240A - Call dumber indicator - Google Patents

Call dumber indicator Download PDF

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Publication number
US1800240A
US1800240A US36831429A US1800240A US 1800240 A US1800240 A US 1800240A US 36831429 A US36831429 A US 36831429A US 1800240 A US1800240 A US 1800240A
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Prior art keywords
disc
contact
station
called
spring
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Expired - Lifetime
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English (en)
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/57—Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/32—Signalling arrangements; Manipulation of signalling currents using trains of DC pulses

Definitions

  • a device comprising a contact system formed of the number of the calling apparatus and which, after selecting and connection with the called telephone, functions automatically and at the same time connects the resistance parallel to the subscribers line which remains connected and makes it possible to transmit other signs with the aid of the usual number disc.
  • Thisresistance is I dimensioned so that during the interruptions of the impulse contact the feeding current in the subscribers loop is not interrupted but reduced to a minimum, so that the corresponding li'ne relays in the central station remain attracted, whereby the connection be tween the calling apparatus and the receiving apparatus remains preserved-
  • the current impulses act then no longer in the central station but merely inductively in the subscribers loop of. the called apparatus, where the receiving apparatus transmits the current impulses upon an auxiliary circuit in which they are recorded by a recording device.
  • Fig. 1 shows diagrammatically an ordinary subscribers apparatus however with the arrangement by which, also without the intention of the caller, his number is recorded at the called subscriber.
  • Fig. 2 shows diagrammatically the apparatus of the called subscriber and the connection necessary for operating the recording device.
  • Fig. 3 shows the connection of the calling apparatus through an automatic selector cen- 65 tral station to the called apparatus during the impulse transmission.
  • Fig. 4 shows in part elevation the arrangement of the commonly used number disc and of the improved disc, releasing automatically and indicating the call number.
  • Fig. 5 is a side elevation of Fig. 4, the number disc being omitted.
  • Fig. 6 is a section through Fig. 5.
  • Fig. 7 is a rear elevation of the Figs. 4, 5 and 6.
  • Fig. 8 shows a portion of the top plan View of the Figs. 4, 5 and 6.
  • Figure 9 is a side View showing the driving mechanism of Figure 2;
  • F Figure 10 is a part view on line CD of igure 11 is a view on line AB of Fig. 9;
  • Figure 12 is a section of part of mechanism shown in Fig. '9;
  • This current excites in a known manner in the central station C the relays 14 of the electric arrangements. ccording to the number selected alternating current flows now from the central station C through the wires 3 and 4 to the called station E, i. e. from the wire '5 is operated, whereby the alternating current is replaced by the feed current (talking current).
  • the invention consists of an arrangement on the call station A and in special connection arrangements in the called station B.
  • a form of construction of the apparatus to be mounted in the call station A will be first described.
  • the usual number disc 15 (Figs. 4 and 8) is rigid with a coaxial spur wheel 16, which meshes with a spur wheel 17 keyed on a shaft 18 journaled in the wall 51 of the casing.
  • a pawl 19 is loosely mountedwhich, when the spur wheel 7 rotates in the one direction, pushes forward a ratchet wheel 20.
  • the ratchet wheel 20 is locked by a lockingpawl 21, loosely mounted on wall 51 of the casing (Fig. 5), so that this ratchet wheel cannot rotate.
  • the ratchet wheel 20 is keyed on a sleeve 22, rotatably mounted on shaft 18.
  • the disc 25 rves as moving ahead disc.
  • the spur wheel'li has on the front side a cam disc 28 with cam 29. Against the rim of the cam disc bears the free end of a lever 30 keyed on a shaft 32.
  • the moving ahead disc ,25 has further a cam 54 (Fig. 1).
  • a spur wheel '35 and a spur wheel. 37 are loosely mounted, the latter being rigidlyconnected to a ratchet wheel 38 by means of a bush 89.
  • a catch disk having an abutme'nt46 is loosely. mounted between the spur wheel 37 and the ratchet wheel 38.
  • the catch disc 40 carries further a pin 90 onwhich a lever 41 and a catch pawl'43 rigidly connected with 4 each other are loosely mounted.
  • a curve disc 39 is further keyed on which two catch pins 45 and .47 are fixed.
  • a pressure spring 44 against the rim of the curve end of said spring bearing against by the winding aecaaae 'a bridge 34 is fixed in which two axles 91 and 92are mounted on which two spur wheels 93, 94. are loosely mounted and mesh with each other.
  • the spur wheel 93 meshes further with the spur wheel 35, the spur wheel 94 meshing with the spurwheel 37 acting thus as reversing gear.
  • the spur wheel 35 has on the inner surface a ringshaped projection 52 on which one end of the friction spring 36 is fixed, the other free a ringshaped projection 53 on the outer surface of the moving ahead disc 25.
  • a lever 18 is loosely mounted which has an abutment 97 and is connected to the hook 7 of the telephone receiver.
  • a lever 49 havin a nose 98 and an end face 106 (Figs. fl an 1).
  • the sha t 101 is. journaled in the casing wall 51and 8) is further loosely ar ranged.
  • On the type disc 26 a pin is provided and further an indentation (Fig.
  • the sha t 18 is rotated forward and backward according to the direction of rotation of the number disc, through the intermediary of the spur wheels 16 and 17 (Fig. 4).
  • the ratchet wheel 20 and through the same the sleeve 22 is rotated by the pawl 19 in the direction of the arrow line I) (Fig. 4:).
  • the type disc 26 runs then down under the action of its tensioned spring 24 in the same direction (arrow line b Fig. 4) until thepin 50 strikes against the pin 33 which has moved ahead and been stopped by the abutment 97 of the lever 48.
  • the releasing lever 48 is connected with hook 7 of the telephone receiver and has been lowered into this position owing to the receiver having been hung on.
  • the object is to prevent the moving ahead disc 25 to further rotate up to its ini-v tial position.
  • the type disc 26 is also stopped after one rotation.
  • the stopping of the moving ahead disc 25 in this position serves further to stop the cam 54 (Fig. 1) under the contact 55 so that the resistance 56 remains switched in in the line 12.
  • the type disc 26 operates, during its running down movement, the im ulse contact 61 by its contact system 62.
  • T e running down of the two-discs 25 and 26 is singly regulated to form a temporary running down by the common regulating brake- 102 through the intermediary of the spur wheels 99 and 100 and ratchet wheel 103.
  • the contact 58 opened, as the cam 59 i has been lifted out of the indentation 60.
  • the feed current flows then through wire 1, impulse contact 61 and contact 57 to the wire 2, so that this wire is short circuited.
  • the impulse pins 62 arranged on the type disc 26 according to the 'subscribers own number, operate during the running'down of disc 26 the'feeler 63 and thereby the impulse contact 61.
  • the feed circuit is not interrupted as there does still flow a holding current from wire 1 through contact 55 and resistance 56 to the wire 2, whereby the relays 14 in the central station C remain attracted-and consequently the impulses do no longer act in the central station but directly in the wires'3 and- .59 has dropped into the indentation -of disc 26.v
  • the resistance 56 remains however switched in until the telephone receiver is In order to positively intersect and record these impulses in the apparatus of the station A with regard to the running down of the type disc and consequently to the indications of its own subscribers number and then also current impulses adapted to be arbitrarily produced, the following arrangement has been made in the apparatus B.
  • An electromagnetic driving device (Fig. 9) is provided consisting of a permanent magnet 107, the pole pieces 108 of which directed a constant magnetic field on-the armature 64.
  • the armature 64 is alternately polarized by the coil 65 through the call current.
  • the armature 64 is mounted on the shaft 109 which is rotatably journalled in the wall 110 of thecasing.
  • the lever 111 and one end of spring 112 is rigidly mounted. The other end of the spring 112 is fastened in the casing wall 110.
  • wheel 113 connected with toothed wheel 114 and sleeve 115 are rotatably mounted on the shaft 109.
  • a loose spring 116 lies on the sleeve 115 and on the sleeve of the casing wall 110 and acts as lock for the wheels 113 and 114.
  • Thecontact actuating arm 66 with the stop 117 is also rotatable on the shaft-109.
  • the toothed wheel 119, ratchet wheel 120 and catch 79 are keyed on the shaft 118,
  • spring casing 122 are rotatably mounted on the shaft 118.
  • the outer end of the spring 123 is rigidly connected with the spring casing 122, whereas the inner end of the spring 123 is fastened on the shaft 118.
  • the pawl 124 is oscillatably mounted and is pressed against the ratchet 120 by the spring 125.
  • the toothed rim 126 of the spring casing 122 meshes with a pinion 127 keyed on a shaft 128, which is rotatably mounted in the casing wall 110.
  • the air brake 129 is also rigidly mounted on the shaft 128.
  • the toothed wheel 130 is rotatably mounted in the lever 131, the pivot 132 of which is also rotatably mounted in the casing wall 110.
  • the surface 133 of the lever 131 acts as armature and is operated by the core'134l, on which the coil 135 is mounted.
  • the current flows through the windings 135 and 65.
  • armature 133 attracts the clutch 81 and causes through the lever 131 the engagement of the toothed wheel 130 in the two toothed wheels 119 and 121, which are thereby coupled.
  • the armature 64 oscillates' through the adjusted spring 112 synchronously to the number of periods of the. alternating current and shifts the wheel 113 in the direction of the arrow through the lever 111 and the wheels 137. Consequently, the catch 79 also moves forward in the direction of the arrow'through the-toothed wheels 114, 121, 130, 119 and the shaft 118.
  • the spring 123 is tensioned and the spring casing 122 locked bv-the pawl 139.
  • the contacts 68 and 169 are auxiliary contacts which during the corresponding switching proceedin bridge the relay 73, in order that the impu ses thereby produced are not recorded.
  • control relay 71 There is further rovided a control relay 71, a throttling coil 72, a highlysensitive polarizer relay 73 (for induction currents) and a condenser 7t.
  • a writing magnet 76 and for instance a magnet 77 for conveying the ribbon are inserted.
  • the relay 71 oscillates the contacts 80.and
  • the contact 86 of the relay 73 closes and opens during the impulse transmission the circuit of the writing magnet in accordance with the-current impulses.
  • the type disc 26 in the caller station A Before the called subscribed removes the telephone receiver of his apparatus the type disc 26 in the caller station A has already been released and transmits the subscriber number of the caller to the station B of the called subscriber so that the latter can controlthe number of the caller before he receives the communication. If the called subscriber is absent, the caller can transmit communications by his'number disc 15, his call number having been recorded in the called apparatus by the running down of the type disc even without intention of the caller as the receiving device in the apparatus B is ready for reception also after the receiving of the number positively transmitted from station A by the running down of the type disc 26 and owing to the retarded moving backward of the device 66 to 79 in 78.
  • the releasingof thedevice in B operates in the following manner:
  • An arrangement as specified in claim 1, comprising in combination with the resistance in a callers station and with the number disc in this station, a type disc coupled with said number disc comprising a si contact s stem; adapted to be automatica y connecte in parallel after the selecting of the number to be called said resistance to the feed line and to transmit corresponding signs into the loop of the receiving station.
  • An arrangement for positively indicatng the call number or other signs of a calling subscriber in the called subscribers station by the number disc in automatic connecting telephone installations comprising in the caller station a resistance adapted to be connected in parallel to the feed wires of this station atthe number selecting and to remain switched in until it is cut out by the telephone receiver being hung on and dimensioned so that the inductive current impulses produced after the selecting by the caller remain ineflective on the line relay of the central station acting merely in the loop of the called subscribers station, an auxiliary circuit in the called subscribers station to which said current impulses are transmitted, and an indicating device inserted in said auxiliary circuit and operated by said current impulses.
  • An arrangement as'specified in claim 1, comprising in combination with the resistance and with the number disc in the callers station, a type disc coupled with said number disc, signs fixed on said type disc adapted to automatically connect said resistance in parallel to the feed line after the selection of the'called number and to transmit correspondaratchet wheelrotat'e from said number disc at the number selecting, a rotatable sleeve on which said ratchet wheel is' keyed and said a disc is loosely mounted, a moving ahead sc loosely mounted on said sleeve said type -cu1t 1n the called station a throttlm cell, a
  • An arrangement as specified in claim 1, comprising in combination with the resistance and with the number disc in the caller s station, a type disc coupled withsaid number disc, signs of a contact system fixed on said t e disc adapted to automatically connect sa1d resistance to the feed line after the selection of the called number and tdtransmit corresponding signs into the loop of the called station, a ratchet wheel rotated from to said number disc at the number selecting, a
  • a moving ahead disc loosely mounted on said sleeve said type disc and said moving ahead disc forming together-a spring barrel, two springs in said spring barrel hooked each with one end to said sleeve the other free ends acting res ectively on said type disc and on said moving ahead disc, a cam disc rotated from a number disc, levers, abutments, and parts between said cam disc and said type disc for liberating said type disc at the termi-- nation of the rotation of said number disc at number selecting, two pins for locking said moving ahead disc and said type disc prior to and during the number selecting, a cam on said moving ahead disc, a contact adapted to be closed by said cam after the liberating of said moving ahead disc to switch into circuit said resistance until at the hangin u of the telephone receiver said moving ahead disc is rotated again.
  • An arrangement as specified in claim 1, comprising in the called station a switch device consisting of an oscillatable contact arm, a releasing contact closed by said arm at the beginning of its operative oscillation, an auxiliary contact opened at the beginning of the operative oscillation, of said arm, a sec ond auxiliary contact, and a control contact both adapted to be closed at the end of the ophea set the beginning of the retrograde oscillation at said contact arm said rel r H contact I" v tainingsaid feed circuit until e trtter signs have been recorded.
  • An arrangement as specified inclaim 1 comprising in combination with the feed circontrol relay series-connected to sai ttling coil adapted to close said circuit, a condenser, a high sensitive larized relay series connected to said con enser said condenserand said polarized relay be in par'el connection with to said series-connected throttling coil and control relay,
  • An arrangement as specified in cla 1, comprising in combination with the feed circuit in the called station a throttling coil, a control relay series-connected to said throt tling coil adapted to close said circuit, a condenser, a high sensitive larized relay seriesconnected to said condenser said condenser and said polarized relay in arallel connection with said series-connec 1i throttling coil and control relay, an auxiliary circuit, contacis on said control relay adapted to close said auxiliary circuit, a typing electromagnet, a conveying electromet in said auxiliary circuit controlling said typing electromagnet, and a contact of said high stance polarized relay operating said typing electromagnet.
  • An arrangement'as specified in cla 1, comprising in the called station a switch device consisting of oscillatable contact arm, a releasing contact being closed by said Ken arm at the beginning of its operative oscillation, an auxiliary contact opened at the beginning of the operative oscillation of said arm, a second auxiliary contact, and a con-.
  • trol contact both adapted to be closed at the end of the operative oscillation of said arm so that the feed circuit is closed and the I caller circuitcut'out
  • said control contact and second mentioned auxiliary contact adapted to be opened at the beginning of the retrograde oscillation of said contact arm said releasing contact maintaining said feed circuit closed until the transmitter si s have been recorded .
  • said throttling coll seriesconnected with said control relay alter the closing of the feedcircuit so that in the loop in the called station a decrease of current intensity occurs the voltage in the arrangement being thereby increased In testimony whereof we a our signa- 12o tures.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Transmission Devices (AREA)
US36831429 1929-05-09 1929-06-04 Call dumber indicator Expired - Lifetime US1800240A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB14539/29A GB334839A (en) 1929-05-09 1929-05-09 Improvements in automatic telephone systems

Publications (1)

Publication Number Publication Date
US1800240A true US1800240A (en) 1931-04-14

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ID=10043019

Family Applications (1)

Application Number Title Priority Date Filing Date
US36831429 Expired - Lifetime US1800240A (en) 1929-05-09 1929-06-04 Call dumber indicator

Country Status (7)

Country Link
US (1) US1800240A (enrdf_load_stackoverflow)
BE (1) BE361512A (enrdf_load_stackoverflow)
CH (1) CH133058A (enrdf_load_stackoverflow)
DE (1) DE583032C (enrdf_load_stackoverflow)
FR (1) FR674620A (enrdf_load_stackoverflow)
GB (1) GB334839A (enrdf_load_stackoverflow)
NL (1) NL30427C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2782257A (en) * 1951-07-23 1957-02-19 North Electric Co Automatic telephone system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2782257A (en) * 1951-07-23 1957-02-19 North Electric Co Automatic telephone system

Also Published As

Publication number Publication date
FR674620A (fr) 1930-01-30
BE361512A (enrdf_load_stackoverflow) 1929-10-31
DE583032C (de) 1933-08-26
GB334839A (en) 1930-09-09
CH133058A (de) 1929-05-15
NL30427C (enrdf_load_stackoverflow) 1933-08-15

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