US2350888A - Selecting system - Google Patents

Selecting system Download PDF

Info

Publication number
US2350888A
US2350888A US419879A US41987941A US2350888A US 2350888 A US2350888 A US 2350888A US 419879 A US419879 A US 419879A US 41987941 A US41987941 A US 41987941A US 2350888 A US2350888 A US 2350888A
Authority
US
United States
Prior art keywords
tubes
main
ionization
tube
starting
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
US419879A
Other languages
English (en)
Inventor
Nathan I Hall
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.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories Inc
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 BE475754D priority Critical patent/BE475754A/xx
Application filed by Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to US419879A priority patent/US2350888A/en
Application granted granted Critical
Publication of US2350888A publication Critical patent/US2350888A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Definitions

  • these selecting tubes are provided with a multiplicity of electrodes, each tube having a main anode, a main cathode, and two or I more auxiliary electrodes.
  • auxiliary electrodes of a plurality of these tubes If starting voltage is applied to the auxiliary electrodes of a plurality of these tubes simultaneously, initial ionization occurs in each tube, following which ionization transfers to the gap formed by one of the main electrodes and one of the auxiliary electrodes.
  • the circuit for applying voltage to this gap includes a common impedance, and the current flowing therein as a result of the transfer of ionization in a particular tube lowers the voltage applied to the corresponding gaps of all other tubes to prevent the successivefuil transfer of ionization in any one of these other tubes.
  • this particular tube then proceeds to ionize its main gap, including the main anode and cathode, whereas the remaining tubes are rendered inoperative.
  • a feature of the invention is a selecting system of the kind above-described in which the initial ionization of the tube is transferred 'in two successive stages, both stages involving ionization gaps formed by diflerent pairs of electrodes, and in which an exclusion or lock-out voltage is produced in each 01' these stages to render all except a particular one of the tubes inoperative.
  • Fig. 1 illustrates an embodiment of the invention in which dischargetubes 01' the screen grid type are employed
  • Fig. 2 illustrates a second embodiment in which the tubes are provided with auxiliary anodes
  • Figs. 3 and 4 show alternatives in which the tubes are provided with separate starting gaps
  • Fig. 5 shows an embodiment in which the tubes are provided with screen grids" and with separate starting gaps.
  • This invention is applicable to a wide variety of uses and to numerous kinds of systems. More specifically it is particularly useful wherever it is desirable to make a single exclusive random selection from a plurality of equivalent choices which are subject to a plurality of simultaneous demands.
  • a plurality of demands may exist concurrently for an idle one of a group of lines, links, trunks, relays, magnets or other equivalent devices, whereas it is necessary to restrict the selection to a single 'one of these elements and to exclude all others either so long as the selected element is in use or temporarily until the necessary operations have been eflected to permit the selection of .second one of the desired elements or the group.
  • the selecting system illustrated in Fig. 1 com- 2 assasea it will be understood that the series may contain 5 as many as desired and that the controlling circuits are so arranged that attempts may be made to seize and operate the relays at random. Since the relays are subjected to random seizure;
  • the associated discharge tubes I02, I02 are provided with main anodes, main cathodes and starting electrodes and screen grid electrodes.
  • tube I02 has a main anode I04, a
  • main cathode I05 a starting electrode I00 and a screen grid electrode I01.
  • tube I03 has a main anode I00, a main cathode I00, a starting electrode I I0 and a screen grid electrode III.
  • the respective relays I00, IOI, etc., are
  • the main cathodes I05, I00 are connected directly in multiple to each other and thence through a common inductance element H0 and through a common resistor I I4 to ground. The.
  • starting electrodes are connected through individual resistors to the contacts of switches or. relays by means of which starting potential is applied at will to these electrodes. For instance,
  • starting electrode I05 is connected through resistor II5 to the switch IIS, which serves to connect the positive pole of battery II1 to the electrode.
  • starting electrode H0 is connected through resistor IIO to the individual switch H9.
  • the screen grld's I01, III, etc., are :0
  • relay I00 remains operated, and it is impossible to operate any one of the remaining relays until the guarding potential is removed from the cathodes of the associated tubes.
  • the switches H0 and I2l or the switch IIO alone may be opened to remove the starting potential from the electrodes.
  • the anode-cathode discharge circuit is opened in any conventional manner to permit the deionization of the main discharge gap of the tube I02.
  • switch I2I is first closed and then switches H0 and H0 are closed at substantially the same time.
  • starting potential is applied to electrodes I08 and II 0, and the control gaps of both tubes I02 and I00 are ionized at the same time.
  • the switches H0 and H9 may be -closed substantially at the sametime,
  • the first one to transfer its ionization from the main cathode to thescreen grid will cause an induced voltage in the common impedance II3 which will lower the potential of the cathodes of the remaining tubes to prevent any one of them from transferring its ionization.
  • the main cathodes oi the tubes are connected through common impedance 201 and common resistor 200 to ground; and the starting electrodes 200, 2
  • the auxiliary anodes M5. 2 which replace the screen grids of Fig. 1, are connected directly in multiple with each other and thence through the common resistor 2l.'
  • one or more of the corresponding starting switches are closed to cause the ionization of the starting gaps formed by the starting electrodes 200, 2" and the main cathodes 2H, 2l9..
  • the ionization transfers from the main cathode to the auxiliary anode, and the first tube to transfer its ionization sets up voltages across the impedance 201 and resistor 2'" which apply potentials to the cathodes and to the auxiliary anodes respectively of the remaining tubes to prevent a second one from transferring its ionization.
  • the tube 205 is the first one to transfer its ionization from the main cathode 2 to the auxiliary anode 2l5, current immediately flows from the positive pole of battery 202 through the common resistor 2H, auxiliary anode 2
  • the voltage induced by the impedance 201 and also by resistance 200 is applied to the cathode 2 l0 and to the cathodes of all other tubes in the series and the drop across resistor 2
  • the preferred tube 205 transfers its ionization from the main cathode 2" to the anode 203, and current npw flows in the main discharge gap including the relay 200.
  • Relay 200 operates and performs its required functions. I
  • the tubes 300, 30l have starting gaps, separate from the main anodes and cathodes.
  • the tube 300 has a main anode 002, a main cathode 303, and a starting gap formed by the starting anode 304 and the starting cathode 305.
  • the starting anodes 304, 000 of all tubes are connected directly in m ultiple and thence through the common switch 301 and common resistor 300 to the positive pole of battery 309.
  • . are connected through individual resistors 3, M2 to the negative pole of battery. 1
  • the switch 301 When it is desired to select an idle one of the relays 3l3, 3 associated with the tubes 300, 30L the switch 301 is closed to apply starting potential tothe starting anodes 304, 305, etc., of all tubes in the series.
  • the starting cathodes of all tubes corresponding to "busy relays will have ground potential applied thereto over conductors 315, 3H5, etc., whereas the starting cathodes corresponding to idle relays will be connected only to the negative pole of battery.
  • the starting gaps-of all tubes corresponding to idle relays ionize, and the gaps of the remaining tubes remain deionized. As soon as the starting gaps have ionized.
  • the tubes 400, 40L etc. are provided with separate starting gaps as in Fig. 3, but in this case the work relays 402, 403 are included in cir-" cuit with the main cathodes 000, 005.
  • the individual switch 406 is closed to apply starting potential to the starting anode Ill.
  • 'l00 is ionized over a circuit traceable from the positive pole of battery 409, switch 006, resistor 0 10, starting anode 001, starting cathode 408, inductance ll I, resistor-H2 to the negative pole of battery 0.
  • ionization transfers from the starting cathode 400 to the main anode. "0.
  • This transferred ionization causes the flow of current from the positive pole of battery 5-, common resistor H6, anode 4, starting cathode 008, inductance 0
  • the voltage set up by the impedance I is applied to the starting cathode M! of tube 00! and to the starting cathodes of all other tubes and the drop across resistor 5 is applied to the main anodes to prevent any one of these tubes from transferring its ionization from the starting cathode to th'e'main anode thereof.
  • tub 500 is provided with a main anode- 5", a main cathode 502, a screen grid 503 and, a separate control gap formed by the starting anode 504 and a starting cathode 505. Similarly.
  • the tube 500 is provided with a main anode 501, a
  • main cathode 500 main cathode 500, a screen grid 509 and with a.
  • separat control gap comprising the starting anode 5l0 and the starting cathode 5! I.
  • the tube 500 succeeds in locking out any other tube; in the second stage of ionization which may not have been successfully locked out in the first stage of ionization transfer.
  • the final transfer takes place in the tube 500 between the main anode and cathode, and current now flows from the grounded pole of battery 5
  • ! operates, and the voltage drop acros the common resistor SIB prevents any other tube from ionizing its main discharge gap.
  • the switch 5" may be opened to deionize the control gap SIM-SIS.
  • ! may be released by opening the common anode supply circuit in any suitable manner.
  • space discharge tubes illustrated herein may be of any suitable type, such as those filled with diiierent gases, it has been found that better results are obtained in the systems disclosed when tubes filled with argon are employed.
  • a plurality of discharge tubes each having main electrodes forming a main discharge gap and a plurality of auxiliary electrodes, circuit means for applying at random a starting potential to one of the auxiliary electrodes of one or more of said tubes to start the ionization of said tubes, an auxiliary discharge circuit common to all of said tubes and including an auxiliary gap of each tube formed by one of the main electrodes and one of the auxiliary electrodes, means for causing the transfer of ionization of any particular one of said tubes to the auxiliary gap thereof and the consequent flow of current in said auxiliary discharge circuit, and a common impedance element for producing a voltage drop in response to the flow of current in said auxiliary discharge "circuit, said voltage drop being applied to the auxiliary gaps of said particular tube.
  • a plurality of discharge tubes each having main electrodes forming a main discharge gapand a plurality of auxiliary electrodes, circuit means for applying at random a starting potential to one of the auxiliary electrodes of each of a plurality of said tubes to start the ionization thereof, an auxiliary discharge circuit having a common branch for all of said tubes' and an individual branch for each tube including an auxiliary gap of such tube formed by one of the main electrodes and one of said auxiliary electrodes, potential means for causing the initial ionization of any particular one of said tubes to transfer to the auxiliary gap thereof and the consequent flow of current in the main branch of said discharge circuit, a common impedance element in the main branch of said circuit for pro-.- ducing a voltage drop in response to the flow of current in said auxiliary circuit, said voltage drop beingtapplied to the auxiliary gaps of said tubes to prevent the transfer of ionization of all tubes except said particular tube, a main discharge circuit for each of said tubes including the main electrodes thereof, and means
  • a plurality of discharge tubes each having a main anode and a main cathode forming a main discharge gap and having auxiliary electrodes
  • circuit means for applying a starting voltage to the gaps formed by two of the electrodes of each of a plurality of said tubes for starting the initial ionization of said tubes simultaneously
  • a discharge circuit including a common branch, individual branches connecting said common branch in multiple to one of the main electrodes of each of said tubes, and individual branches connecting said common branch in multiple to one of the auxiliary electrodes of each of said tubes, the multipled main electrodes and the multipled auxiliary electrodes forming auxiliary discharge gaps
  • potential means responsive to the initial ionization of any particular one of said tubes'for causing the ionization of the auxiliary discharge gap of said tube
  • a common impedance element in the main branch of said discharge circuit for producing a voltage drop in response to the ionization of the auxiliary gap of said particular tube, said voltage drop serving to render inoperative all tubesexcept said particular tube, a main discharge circuit for each
  • a plurality of discharge tubes each having two main electrodes formin a main discharge gap and having a plurality of auxiliary electrodes, circuitmeans for applying potential to one of the auxiliary electrodes of said tubes to cause the initial ionization of a plurality of said tubes simultaneously, a first auxiliary discharge circuit including a first auxiliary discharge gap of each of said tubes formed by one of the main electrodes and one of the auxiliary elecof said tubes formed by one of said main electrodes and another of said auxiliary electrodes, means responsive to the initial ionization of a particular one oi said tubes for causing the transfer of ionization in successive steps first to said first auxiliary gap and then to said second auxiliary gap of said particular tube, the ionization of each auxiliary gap causing the flow of current in the corresponding auxiliary discharge circuit, an impedance element common to both auxiliary discharge circuits, said impedance element serving to produce a voltage in response to the flow of current in the first auxiliary circuit to prevent the transfer of ionization to the first
  • a main discharge circuit for each of said tubes including, the main discharge gap thereof, and means for causing the transfer of ionization from the second'auxiliary discharge gap of said particular tube to the main discharge gap thereof.
  • a plurality of discharge to start the ionization thereof an auxiliary dis-'v charge circuit common to all of said tubes and including the auxiliary gap of each tube, voltage means for causing the transfer of the initial ionization of any particular one of said tubes to the auxiliary discharge gap thereof and the consequent flow of current in said auxiliary discharge circuit, and a common impedance element for producing a voltage drop in response to the flow of current in said auxiliary discharge circuit, said voltage drop being applied to the auxiliary gaps of said tubes to render all tubes inoperative except said particular tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
US419879A 1941-11-21 1941-11-21 Selecting system Expired - Lifetime US2350888A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE475754D BE475754A (xx) 1941-11-21
US419879A US2350888A (en) 1941-11-21 1941-11-21 Selecting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US419879A US2350888A (en) 1941-11-21 1941-11-21 Selecting system

Publications (1)

Publication Number Publication Date
US2350888A true US2350888A (en) 1944-06-06

Family

ID=23664129

Family Applications (1)

Application Number Title Priority Date Filing Date
US419879A Expired - Lifetime US2350888A (en) 1941-11-21 1941-11-21 Selecting system

Country Status (2)

Country Link
US (1) US2350888A (xx)
BE (1) BE475754A (xx)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2428126A (en) * 1944-07-21 1947-09-30 Colonial Radio Corp Duplex control circuit
US2433424A (en) * 1944-06-24 1947-12-30 Otis Elevator Co Electronic timing apparatus
US2458283A (en) * 1944-10-23 1949-01-04 Automatic Elect Lab Impulse generator
US2542672A (en) * 1948-10-27 1951-02-20 Bell Telephone Labor Inc Coordinate selecting and lockout circuit
US2576948A (en) * 1945-03-20 1951-12-04 Roy Raymond B Le Deflection circuit
US2578701A (en) * 1949-09-15 1951-12-18 Bell Telephone Labor Inc Coordinate selecting and lockout circuit
US2582959A (en) * 1947-10-29 1952-01-22 Bell Telephone Labor Inc Electron-tube controlled switching system
US2586319A (en) * 1948-02-24 1952-02-19 Gen Electric Electric device continuity tester
US2602544A (en) * 1945-06-30 1952-07-08 Ibm Record sorting machine
US2637810A (en) * 1948-11-12 1953-05-05 Potter Instrument Co Inc Electronic pulse generator
US2666848A (en) * 1948-12-02 1954-01-19 Erco Radio Lab Inc Selective audio gate circuit
US2668195A (en) * 1949-12-29 1954-02-02 Bell Telephone Labor Inc Marking and switching system
US2680194A (en) * 1949-05-20 1954-06-01 Bell Telephone Labor Inc Radiotelephone receiving system
US2686837A (en) * 1949-09-10 1954-08-17 Bell Telephone Labor Inc High-speed electronic switching system
US2691151A (en) * 1950-05-22 1954-10-05 Products & Licensing Corp Multiple switching systems
US2731559A (en) * 1952-07-11 1956-01-17 Neil A Marshall Electronic measuring device
US2968021A (en) * 1946-04-03 1961-01-10 Gaynor O Rockwell Depth charge attack recorder
DE975471C (de) * 1952-01-16 1961-12-07 Automatic Telephone & Elect Elektronischer Umschalter in Fernmelde-, insbesondere Fernsprech-anlagen
US3174079A (en) * 1961-09-14 1965-03-16 Eastman Kodak Co Photoelectric discriminator

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2433424A (en) * 1944-06-24 1947-12-30 Otis Elevator Co Electronic timing apparatus
US2428126A (en) * 1944-07-21 1947-09-30 Colonial Radio Corp Duplex control circuit
US2458283A (en) * 1944-10-23 1949-01-04 Automatic Elect Lab Impulse generator
US2576948A (en) * 1945-03-20 1951-12-04 Roy Raymond B Le Deflection circuit
US2602544A (en) * 1945-06-30 1952-07-08 Ibm Record sorting machine
US2968021A (en) * 1946-04-03 1961-01-10 Gaynor O Rockwell Depth charge attack recorder
US2582959A (en) * 1947-10-29 1952-01-22 Bell Telephone Labor Inc Electron-tube controlled switching system
US2586319A (en) * 1948-02-24 1952-02-19 Gen Electric Electric device continuity tester
US2542672A (en) * 1948-10-27 1951-02-20 Bell Telephone Labor Inc Coordinate selecting and lockout circuit
US2637810A (en) * 1948-11-12 1953-05-05 Potter Instrument Co Inc Electronic pulse generator
US2666848A (en) * 1948-12-02 1954-01-19 Erco Radio Lab Inc Selective audio gate circuit
US2680194A (en) * 1949-05-20 1954-06-01 Bell Telephone Labor Inc Radiotelephone receiving system
US2686837A (en) * 1949-09-10 1954-08-17 Bell Telephone Labor Inc High-speed electronic switching system
US2578701A (en) * 1949-09-15 1951-12-18 Bell Telephone Labor Inc Coordinate selecting and lockout circuit
US2668195A (en) * 1949-12-29 1954-02-02 Bell Telephone Labor Inc Marking and switching system
US2691151A (en) * 1950-05-22 1954-10-05 Products & Licensing Corp Multiple switching systems
DE975471C (de) * 1952-01-16 1961-12-07 Automatic Telephone & Elect Elektronischer Umschalter in Fernmelde-, insbesondere Fernsprech-anlagen
US2731559A (en) * 1952-07-11 1956-01-17 Neil A Marshall Electronic measuring device
US3174079A (en) * 1961-09-14 1965-03-16 Eastman Kodak Co Photoelectric discriminator

Also Published As

Publication number Publication date
BE475754A (xx)

Similar Documents

Publication Publication Date Title
US2350888A (en) Selecting system
US2373134A (en) Signaling system
US2576099A (en) Electrical translator of finary code to decimal code
US2651718A (en) Switching device
US2291752A (en) Selecting system
US2303016A (en) Impulse counting circuit
US2454781A (en) Matched potential control system
US2379093A (en) Signaling system
US2779822A (en) Communication switching system employing gas tubes
US2354682A (en) Electric selection controlling circuit
US2023589A (en) Switching mechanism
US2326551A (en) Selecting system
US2542672A (en) Coordinate selecting and lockout circuit
US2315705A (en) Testing and selecting system
US2668931A (en) Electronic register for telephone switching systems
US2562100A (en) Coordinate selecting and lock-out circuit
US2352742A (en) Pulse register circuit
US2633498A (en) Selecting and two-way translating system
US2706222A (en) Transistor lockout circuit
US2299229A (en) Selecting system
US2578701A (en) Coordinate selecting and lockout circuit
US2245160A (en) Telephone system
US2794121A (en) Lockout circuit
US2944114A (en) Communication switching system employing gas tubes
US2306882A (en) Selective system