US2440249A - Key controlled numerical digit register equipped with discharge tube means - Google Patents

Key controlled numerical digit register equipped with discharge tube means Download PDF

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Publication number
US2440249A
US2440249A US532142A US53214244A US2440249A US 2440249 A US2440249 A US 2440249A US 532142 A US532142 A US 532142A US 53214244 A US53214244 A US 53214244A US 2440249 A US2440249 A US 2440249A
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US
United States
Prior art keywords
key
line
register
keys
controlled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US532142A
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English (en)
Inventor
Deakin Gerald
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL69825D priority Critical patent/NL69825C/xx
Priority to BE466584D priority patent/BE466584A/xx
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Priority to US532142A priority patent/US2440249A/en
Priority to GB5241/45A priority patent/GB601906A/en
Priority to US593600A priority patent/US2428016A/en
Priority to FR925808D priority patent/FR925808A/fr
Priority to CH276280D priority patent/CH276280A/fr
Application granted granted Critical
Publication of US2440249A publication Critical patent/US2440249A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11C—FATTY ACIDS FROM FATS, OILS OR WAXES; CANDLES; FATS, OILS OR FATTY ACIDS BY CHEMICAL MODIFICATION OF FATS, OILS, OR FATTY ACIDS OBTAINED THEREFROM
    • C11C3/00—Fats, oils, or fatty acids by chemical modification of fats, oils, or fatty acids obtained therefrom
    • C—CHEMISTRY; METALLURGY
    • C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11D—DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D13/00—Making of soap or soap solutions in general; Apparatus therefor
    • C11D13/02—Boiling soap; Refining
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses or impedance dialling
    • 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
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Definitions

  • This invention relates to new and usefulimprovements in switching systems of the type useful in controlling telecommunication.
  • the object of the invention is to provide ⁇ a simple key-set controller selectively switching in circuit a relatively small number of resistances for controlling as many different switching operations as there are keys, For instance, a ten-button key set is provided with ve resistances for controlling the performance of a desired one of ten switching operations.
  • a responsive or registering device is interposed between the key set and the switching device. It comprises electric discharge devices arranged in aY number of groups less than the number of keys.
  • six identical vacuum tube circuits have their grids connected in multiple to one wire of a two-wire line connected with the key set.
  • the common lead is connected to ground through, e. g. a resistor of, e. g. 5,000 ohms.
  • the register is picked up, which in an automatic telephone system means that the line is closed to ground at the central office through the subscribers set, the free end of a resistor of,e. g. 1,000 ohms also attached to this common lead is connected to a common battery of 48 volts.
  • the potential of the common lead depends upon the value of the combined series line and key controlled resistance to ground in multiple with any leakage.
  • An ample series of potentials may be obtained to operate any one of six tube circuits in multiple with the aforementioned leakage.
  • the operation of one, two or three of these tube circuits makes it possible to select any one of ten digits, to change over from one selection to the other, or to eiect a premature release should the calling subscriber hang up before the register is disconnected in the normal way after completing selection of the called line.
  • the use of tube circuits in this manner eliminates timed circuits, timed relays or step-by-step means 2 now so generally used in dial-controlled register circuits.
  • Figs. 1 is a diagram of a telephone substation circuit equipped with a key set
  • Fig. 2 is explanatory of the order in which the key contacts are operated
  • Figs. 3-8 show the mechanical arrangement of the key set, Fig. 3 being a section along 3-3 of Fig. 5, Fig. 4 a section along 4--4 of Fig. 6, Fig. 5 a section along 5 5 of Fig. 3, Fig. 6 a section along 6 6 of Fig. 5, Fig. 7 an end view of the key set with part of the wall broken away, and Fig. 8 is explanatory of the manner in which the contacts are operated; c
  • Fig. 9 illustrates a telephone set equipped with a key controller
  • Fig. 10 is a diagram oi' the register circuit
  • Fig., 11 is explanatory of the functioning of the control circuit.
  • Fig. l12 is a tabulation of the resistance values used and potentials applied to the register.
  • contact l of the home contact nest closes and short-circuits the induction coil and transmitter.
  • contact 2 opens and removes a shortcircuit around resistor RX and the iive keying contacts CI to C5.
  • Resistor RX is adjusted individually at each station so as to make the combined series resistance of RX plus the line wire LR in the loo ⁇ p to the central oilice 500 ohms i-5%.
  • a ten-button key set is shown in these figures. It comprises ten keyY plungers I of which a rectangular portion pierces a housing 2 and is free to slide in said housing. The plunger is slipped through .the housing from the bottom, after which button :i is attachedto it in any suitable manner. The lower' part 'fof .the plunger I is round and over this partis slipped retractile spring 4, which rests against thejbottfom plate 5 of the housing and againstthe rectangular part of the plungerat' the'. top.v V',Ihuslthe spring normally keeps the plunger'in the position shown. A slanting wiper 6 projectsirom Y.each plunger.
  • Barl.B3 operates contact C3 direct.
  • the other ends of the ve bars rests against an insulated piece 9 attached to band spring! (see Figl');
  • Spring 9 keeps all the five bars in engagementwith their corresponding C contacts. Movement of the spring ⁇ 9 is limited by back stop I2.
  • the ve bars are heldin position by slotted insulator ,supports IIJ (Fig. 5) which are attached to the bottoni of thehousingt.
  • table set l25 equipped with handset 20 and key set 2
  • fI get the keys out of the way when removing and replacing thehandset, and to obtainthe required depth for the key set without disturbing thenorial arrangement of ringer, induction coilv and.v ,con-
  • the keys are backof the handset. -The keys are guarded against accidental operation or damage by 'sidea'rid ⁇ Vrear walls 22 and 23. v
  • RBR also vOperates RIR which Controls release and the vdischarge tube meansmarked Tube Ct.
  • the 45 ,dischargetube means marked Tube Ct. #5 controls the change-over from one, digit to the next,
  • GVRI operates. When zikey 1 is nearly fully depressed, it momentarily cuts in R5 (Fig. 1) vand applies potential of approximately 18 volts, whereupon the No. 5 pair Aof triodesoperates and energizes GVRS (Fig. 10).
  • GVR5 grounds the armature of relay GVRI, thereby causing XRI to operate.
  • GVRS also operates DTR which looks up over a front contact of RI R and disconnects the dialing tone. Shortly after GVR5 makes its iront contact, itv opens its back contact and releases HTR. HTR falls oii, de-ionizes GV and releases GVR of tube circuitsNos. 1 and 5.
  • GVR5 When ground is removed from the winding of XR, the latter locks up over a front contact in series with the Winding of TRI andaront contact of RCR. TRI operates, and transfers the tube circuits to the second set -of XR relays over back contacts of TR2.
  • the second and following digits are, keyed in lthe; same manner as the iirst, tube circuits Nos. 1 to 4 or combinationsof them being operated according to the key depressed as indicated in the -following table.
  • the tube circuit No. 5 is always the last tobe operated. It locks up the proper XR relay or relays and prepares immediately for thenextselection.
  • a telecommunication system a plurality of lines, each having a multi-digit number, means including a plurality of stages .of numerical selector switches for establishing a, connection between a calling and a called line, a plurality of keys for each line, a normally inactive register comprising digit switching means for Variably operating the selectors in accordance with the different digits of the called number, said register comprising a plurality of electric discharge tube means less innumber than the keys associated with a line, means for establishing a conductive connection from the keys to the tube ⁇ means, a source of direct current potential, means con- 5 .,trolledlby. the keys over the connection for selectively operating the tube means from said source, and means controlled by thev tubes for variably controlling the digit switching means.
  • each line is provided with ten keys and the register four discharge tube means, means controlled by four keys for selectively operating the four tube means, and means controlled by each of the other six keys for operatingtwo of sai-d tube means in six diierent combinations.
  • each line is provided with ten keyseiand the register with four discharge tubemeans,means controlled by four keys for selectivelyV operating the four tube means, means controlled by each of the other six keys for operating two of said tube means in six different combinations, and a fifth tube means in the register operable upon the actuation of any key, and means controlled by the iifth tube means for associating the four tube means with the digit switching means.
  • each tube means comprises a pair of tubes.
  • each tube is ⁇ a triode, a multiple connection from the grids of one triode of each pair to said connection, and connections for applying different potentials to the'grids of the other trio'des of each pair.
  • a source of D. C. potential a switch variably operable depending on the potential applied thereto, a plurality of two-wire lines, means for connecting a line with the source and the switch, keys associated with each line, home and keying contacts controlled by l said keys, at least four different resistances connected in series with one another between the line wires over home contacts, a shunt normally closed V.around each resistance by. a different keying contact, means for actuating the home contacts when any key is operated, and means controlled by each key for successively momentarily opening diierent keying contacts.
  • a source of D. C. potential a switch variably operable depending on the potential applied thereto, a plurality of two-wire lines', means for connecting a line with the source and the switch, keys associated with each line, home and keying contacts controlled by said keys,'ve different resistances connected in series with one another between one line wire and a normally open home contact, the later connected with the'other wire,'a shunt normally closed around each resistance by a dlierent keyingcontact, a sixth resistance for each line in series with the five resistances of a value approximately equal to the diierence between the loop resistance of the line and a predetermined value, a shunt around the six resistances including a normally closed home Contact, means for actuating the home contacts when any key is operated, and means controlled by thekeys for successivelyv momentarily opening different keying contacts.
  • a source of D. C. potential a switch variably operable depending on the potential applied thereto, a plurality of two-Wire control circuits, means for connecting one of the circuits with the source and the switch, ten keys associated with each line, a pair of normally closed keying contacts for each key, normally open and normally closed home contacts, ve different resistances for each line connected in series with one another between one line wire and a normally open home contact, the latter connected with the other wire, a shunt normally closed around each resistance by a diiierent keying-contact, a sixth Vresistance for each line in sei'es with the iive resistances and having a value approximately equal to the difference between the loop resistance of the line and a predetermined value, a shunt around the sixth resistance and the keying contacts including a normally closed home contact, means for actuating the home contacts when any key is operated, a longitudinally movable plunger for each key, and means controlled by each plunger for successively momentarily opening
  • a plurality oi lines each having a multi-digit number means including a plurality of stages of numerical switches for establishing a connection between a calling and a called line, a register for successively controlling the operation of said switches, a controller comprising ten keys associated with each line, each key adapted to variably operate the register in accordance with the different digits of the called number, a plurality of but less than ten discharge devices in the register ccnnected to a common lead, key resistances, contacts Vcontrolled by the keys for connecting the key resistances in series with the line, the potential of the common lead depending upon the value of the combined line and key resistances in series to which said devices are responsive, a relay associated with each device and controlled by them, and a selector control circuit controlled by said relays in accordance with successive digits of the called number.
  • a plurality of subscribers two-wire lines each having a multi-digit number
  • means including a plurality of stages of numerical selector switches for establishing a connection between a calling and a called line, a plurality of registers for successively controlling the oper-ation of said switches, ten keys associated with each line for Vvariably operating a register in accordance with the different digits of the called number, means for connecting a calling line with an idle register, six pairs of triodes in each register, one triode in each pair having its grid connected in multiple to a common lead to one of the wires of the calling line, a first connection to ground from the common lead over a resistance closed while the register is idle, a second connection from said common lead to battery over a resistance, key resistances, contacts controlled by the keys for connecting the key resistances in series with the line, the potential of the common lead depending upon the value of the combined line and key resistances in series to ground and in multiple with leakage resistance, a different D.
  • a plurality of subscribers two-wire lines each having a multi-digit number, the loop and leakage resistances of a line having predetermined values
  • means including a plurality of stages of numerical selector switches for establishing a connection between a calling and a, called line, a plurality of registers for successively controlling the operation of said switches, ten keys associated with cach line for variably operating a register in accordance with the different digits of the called number, means for connecting a calling line with an idle register, six pairs of triodes in each register, one triode in each pair having its grid connected in multiple to a common lead to one of the wires of the calling line, a first connection to ground from the common lead over a relatively high resistance closed while the register is idle, a second connection from said common lea-d to battery over a relatively low resistance, key resistances, contacts controlled by the keys for connecting the key resistances in series with the line, the potential of the common lead depending upon the value of the combined line and key resistances in series to ground and
  • a plurality of subscribers two-wire lines each having a multi-digit number, the loop resistance of a line being less than about 500 ohms and the leakage resistance less than 25,000 ohms
  • means including a plurality of stages of numerical selector switches for establishing a, connection between a' calling and a called line, a plurality of registers for successively controlling the operation of said switches, ten keys associated with each line for variably operating a register in accordance with the different digits of the called number, means for connecting a calling line with an idle register, six pairs of triodes in is idle, a second connection from said common lead to a 48 volt battery over a 1,000 ohm resistance, key resistances, contacts controlled by the keys for connecting the key resistances in series with the line, the potential of the common lead depending upon the value of the combined line and key resistances in series to ground and in multiple with the leakage resistance, a different D.
  • a plurality of subscribers two-wire lines each having a multi-digit number means including a plurality of stages of numerical selector switches for establishing a connection between a calling and a called line, a plurality of registers for successively controlling the operation of said switches, ten keys associated with each line for variably operating a register in accordance with the different digits of the called number, means for connecting a calling line with an idle register, six pairs of triodes in each register, one triode in each pair having its grid connected in multiple to a common lead to one of the wires of the calling line, a iirst connection to ground from the common lead over a resistance closed while the register is idle, a second connection from said common lead to battery over a resistance, key resistances, contacts controlled by the keys for connecting the key resistances in series with the line, the potential of the common lead depending upon the value of the combined line and key resistances in series to ground and in Vmultiple with leakage resistance, a different D. C.
  • a plurality of telephone substations switch- Vidual contacts controlled by each of the keys each register, one triode in each pair having its and a common contact controlled by all the keys, a device selectively operable ⁇ under the control of the key contacts over said circuit, a ringer and a condenser in series in the circuit at each station, and means oper-able while any key is operated for disconnecting the ringer and condenser from the circuit.
  • a plurality of telephone substations switching devices for connecting a calling with a called station, a circuit leading from each station towards the switching devices, a source of D.
  • C. Potential in said circuit, a plurality of resistances at each station connected in the circuit, a'set of keys, contacts short-circuiting the resistances controlled by the keys, a ringer, a condenser and circuit at eachstation, 4said' home Vcontact short-v circuiting allthe keys, andmeansl responsive to the actuation of-vany' key, of opening the home contact and maintaining it 'open'while thekey is operated;

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
US532142A 1944-04-21 1944-04-21 Key controlled numerical digit register equipped with discharge tube means Expired - Lifetime US2440249A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL69825D NL69825C (fr) 1944-04-21
BE466584D BE466584A (fr) 1944-04-21
US532142A US2440249A (en) 1944-04-21 1944-04-21 Key controlled numerical digit register equipped with discharge tube means
GB5241/45A GB601906A (en) 1944-04-21 1945-03-02 Telecommunication systems
US593600A US2428016A (en) 1944-04-21 1945-05-14 Key-sender for telecommunication systems
FR925808D FR925808A (fr) 1944-04-21 1946-04-19 Perfectionnements aux systèmes de commutation automatique
CH276280D CH276280A (fr) 1944-04-21 1946-12-18 Installation de télécommunication automatique.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US532142A US2440249A (en) 1944-04-21 1944-04-21 Key controlled numerical digit register equipped with discharge tube means

Publications (1)

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US2440249A true US2440249A (en) 1948-04-27

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US532142A Expired - Lifetime US2440249A (en) 1944-04-21 1944-04-21 Key controlled numerical digit register equipped with discharge tube means

Country Status (6)

Country Link
US (1) US2440249A (fr)
BE (1) BE466584A (fr)
CH (1) CH276280A (fr)
FR (1) FR925808A (fr)
GB (1) GB601906A (fr)
NL (1) NL69825C (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2622141A (en) * 1948-10-28 1952-12-16 Oberman Roelof Maarten Marie Signaling system
US2644932A (en) * 1947-12-11 1953-07-07 Ericsson Telefon Ab L M Pulse amplitude responsive selective system
US3483332A (en) * 1965-05-19 1969-12-09 Philips Corp Push-button signalling members

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1337715A (en) * 1920-04-20 Telephone system
US1854106A (en) * 1922-12-22 1932-04-12 Western Electric Co Automatic telephone system
US1982290A (en) * 1927-12-24 1934-11-27 John E Gardner Selecting system
US2269022A (en) * 1940-09-07 1942-01-06 Bell Telephone Labor Inc Telephone system
US2307537A (en) * 1940-03-22 1943-01-05 Bell Telephone Labor Inc Telephone call transmitter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1337715A (en) * 1920-04-20 Telephone system
US1854106A (en) * 1922-12-22 1932-04-12 Western Electric Co Automatic telephone system
US1982290A (en) * 1927-12-24 1934-11-27 John E Gardner Selecting system
US2307537A (en) * 1940-03-22 1943-01-05 Bell Telephone Labor Inc Telephone call transmitter
US2269022A (en) * 1940-09-07 1942-01-06 Bell Telephone Labor Inc Telephone system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2644932A (en) * 1947-12-11 1953-07-07 Ericsson Telefon Ab L M Pulse amplitude responsive selective system
US2622141A (en) * 1948-10-28 1952-12-16 Oberman Roelof Maarten Marie Signaling system
US3483332A (en) * 1965-05-19 1969-12-09 Philips Corp Push-button signalling members

Also Published As

Publication number Publication date
CH276280A (fr) 1951-06-30
BE466584A (fr)
NL69825C (fr)
GB601906A (en) 1948-05-14
FR925808A (fr) 1947-09-15

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