US2447495A - Register switch utilizing a plurality of discharge tubes - Google Patents

Register switch utilizing a plurality of discharge tubes Download PDF

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Publication number
US2447495A
US2447495A US486275A US48627543A US2447495A US 2447495 A US2447495 A US 2447495A US 486275 A US486275 A US 486275A US 48627543 A US48627543 A US 48627543A US 2447495 A US2447495 A US 2447495A
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United States
Prior art keywords
relay
tube
switch
potential
condenser
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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
US486275A
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English (en)
Inventor
Hertog Martinus Den
Lucien Alfred B Cabes
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International Standard Electric Corp
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International Standard Electric Corp
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Publication date
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Priority claimed from GB17423/43A external-priority patent/GB568476A/en
Application granted granted Critical
Publication of US2447495A publication Critical patent/US2447495A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details

Definitions

  • Patent expires July 1 1, 1961 :12 Glaims.
  • the operation. of the first. tube is interruptedwhen the second tube .starts .upon .the desired setting of .the moving apparatus.
  • cathode discharge tube is :used, together -'with :a'
  • the a invention makes possible the stopping of 'a hunting :switch without -:energizing a test .re-
  • Fig. 1 7 shows part of :a register controller and tarselector switch sas idescribedin :theabove-men- 55 f'tioned United fist-ates :xp tent app t 4: 8
  • the tube Ty is a gaseous discharge tube with an indirectly heated cathode containing asfurther electrodes a grid and a plate or anode.
  • the grid is connected to a potential which is negative with respect to the cathode and high enough to prevent the starting of the ionization of the discharge space.
  • relay Chr makes a connection to ground, by which condenser C1 is charged in series with resistance Rz.
  • This condenser is normally kept in a discharged condition over the resistances R2 and R3 in series.
  • the charging of Cr causes a short decrease of the negative potential on the grid resistance R1 of thyratron Ty. This decrease of potential is suihciently large to discharge the thyratron; After a very short time the condenser C1 attains its full charge and the potential on the grid resistance is restored to the original value. This potential has, however,
  • the value of C3 is selectedso that the duration of the increased current is sufiiciently long fully Alternating current test of selector switch
  • the controlling electrode of the cold-cathode tube T2 is normally connected over a high resistance and a second resistance of 15,000 ohms to a potentiometer, consisting of three resistances of 7500, 2500 and 7500 ohms.
  • the potential connected to the controlling electrode by means of this potentiometer via the back contact of relay W1? is such, that ionization of the tube T2 will occur if this potential is not decreased by a rectified alternating current supplied by the rectifier bridge Re in series with a retardation coil RC to the resistance of 15,000 ohms.
  • the direct current potential obtained from the rectifier Re is normally of opposite direction to that obtained from the potentiometer.
  • the alternating current connected to rectifier Re will decrease to zero only by the receipt of a signalling current in the transformer H01, which has the same characteristics as the reference current which is supplied to the transformer HCz, so that it cannot supply direct current to the resistance of 15,000 ohms.
  • the potential of the controlling electrode is then increased to the potential supplied by the potentiometer, and the cold-cathode tube is ionized.
  • the potential on the anode of T2 which till this moment was equal to the ground potential, is increased to a value which is equal to 130 volts, less the potential of the tube T2, which amounts to about "75 volts.
  • This increase of about 55 volts of the potential of the anode of T2 causes a charge displacement of the condenser C2. Since the anode gets a, negative charge, an impulse of negative direction is applied to the plate of the thyratron Ty for a short time.
  • Tube Tz-causes also theenergizing' of relay Vtr in series with the discharge space; Relay Vt? closes-'thefollowin'g circuit for the-energizing of relay-Fir: ground; front-cont-actof 'Vtr, back cont'actsof-Gbrand Fhr; wind"- ing of-Ft'r, to battery.
  • Relay Fir prepares atemporarylocking circuit for itself, in series with the winding of-relay Fhr; but as long asrelay Vtr is energizedg Fhr cannot operate.
  • Relay Ftr opens also the circuit for relay Chr, which'is thenreleased and: opens the cathcdeand' anode circuits of'tube T2. The' tube T2 is'thus extinguished and relay Vtr' released.
  • Direct current testlifter the termination of the alternating cur rent test, the registertests'whether afroedirect current potential is present on the terminal on which the selector switch stopped; Iftliisis the case, the outlet is definitely seized and the'hunting selector switch is connected throughby op; erating its relay Br. In the absenceof direct current potential on the selected terminal, the selector switch must continue hunting". This must take place also in-case alternating current potential ispresent on the dterminal,-andit must be possible forthe selector switch to stop on the next terminal to which" this potential applied; This happens as follows:
  • relay Vtr operates for the secondtim'e'aml energizes feritseif under-"thecontrol of'a back contact-of relay* WZ r 'to-aback" contact of relay- Vrr. It opens ground” for-relay-C'hr, whereuponthis relay releases: and tube' T2" extinguishes.
  • Relay'Vrr iso'perated by'rel'ay' Saw; whereupon the" relays Fir" and Flu release: Relay s'tr is-kept operated by relay Sar, until the magnet of switch OM is fully en'ergi'ze'd' a-nd'theswitch opens its interrupter contact, "and? until relay Dtr" is released; Thistakes place when the circuit'for the free test potential is op'ened at the seizedoutlet.
  • Relay GUT closes a temporary'locking circuit for'its'elfto groundover the-back contact of relay V'Tr'anct in turn operates relay Wlr.
  • the. alternating. current obtained fromtheoutlet is equal to the reference. potential whereby no alternating current wil1 be delivered tbfiih'e rectifier. 'I'ube'Tz' can,.therefore, not resporr'd.
  • relay Chr is now energized, con-.- denser C1 is again charged via the front contact of 'relay.Ghrandtube Ty. is again ioniz d; Whereupon th'epower magnet' is operated andtlie selector switch leaves the selected outlet. Atthe moment the df' brushcf the selector switch opens itscontactythe alternating current potenttiarisinterrupted, an alternating current po- I which operates.
  • relay Vrr causes the release of relay 0711' and tube T2 extinguishes. After that, relays Gbr and Wlr will also release. The latter will restore tube T2 to normal condition.
  • tube T2 will respond when rela Chr is energized and relay Str tie-energized, because the absence of signaling current. creates the required condition therefore in the energized condition of relay Wlr.
  • the responding of tube T: will then have the same result as in the case described sub 11. 1
  • Figure 2 shows parts of a register controller and a selector switch, as described in the United States patent application Ser. No. 473,883.
  • tube Ty the condensers C1, C21, C22, C3 and the resistances R1, R2, R3 and R4 are added, apart from some further small differences, which are mainly the same as in Figure 1.
  • the last mentioned application describes an arrangement whereby a selector switch is controlled by two signal receivers in the register controller, in such a way that if one of them responds, then the selector switch is caused to stop.
  • the register determines what the reaction should be to the seizure of this outlet.
  • I Figure 2 provides a solution by using a single thyratron, which is common to more than one signal receiver.
  • relay Chr has front contacts connected to the anode and cathode circuits of the two coldcathode tubes B1 and B2 and as in Figure 1 this is the same relay which charges via a front contact the condenser C1 thereby producing in the thyratron the discharge condition when the wipers of the selector switch must be started to move.
  • the plate of the thyratron is now connected via two condensers C21 and C22 to the anode circuits of the two tubes B1 and B2.
  • the thyratron will be extinguished, either by a charge displacement of condenser C21 when tube B1 responds, or by the charge displacement of condenser C22 when tube B2 responds.
  • the reference current X connected to transformer T1 of the upper signal receiver of Figure 2 is chosen in accordance with the called number digit designating the group of outlets to be selected, and the reference current Y is chosen in accordance with the designation of an alternative group.
  • a ground is connected via the brush a of switch OM.
  • Relay Chr is operated, connects the tubes B1 and B2 and ionizes the thyratron by charging condenser C1.
  • the switch power magnet P is energized in series with the thyratron.
  • the upper signal receiver responds and tube B1 is ionized.
  • Condenser C21 applies a negative charge to the plate of the thyratron, which is extinguished and stops the selector.
  • Relay Vtr is operated in series with tube B1 and this operates relay Ftr.
  • Relay F'tr opens the circuit for relay Chr, which extinguishes tube B1 and discharges condenser 01.
  • Relay Vtr releases and operates relay Fhr, which now again operates relay Chr and causes a second alternating current test to take place. In case this test is successful, relay Vtr operates again and in turn operates relay Sir, which now initiates the direct current test.
  • relay Kir is operated via the back contact of relay Vtr and front contact of relay Chr, so that relay Vrr operates, which releases all operated relays and, after also relay Kir is released, will itself release and cause the hunting movement to start anew.
  • relay Gbr will operate via a front contact of relay Str and a back contact of relay Tr, as will also relay W111 via a front contact of relay Gbr and a back contact of relay Vtzr.
  • Relay Sir opens the circuit of relay Chr, so that tube B1 is extinguished.
  • Relay Wlr releases relays Ftr, PM and Sir, whereupon the circuit of relay Chr is again closed.
  • Relay W111 has in the meantime so changed the circuits of tube B1 that it will respond only in the absence of signaling current.
  • the thyratron is again ionized and the selector switch hunts until its brush (1 open the contact.
  • Tube B1 responds, extinguishes the thyratron and operates relay Vtr.
  • This relay in turn operates relay Vrr, which releases all other relays, including Gbr and W111 and finally releases itself and causes the selecting movement to start anew.
  • tube B2 belonging to the second signal receiver responds. This causes the thyratron to extinguish by applying a negative charge to condenser C22.
  • relay Vtrr is operated, which successively operates the relays Vt21 and Ftr.
  • Relay Vt'21 locks itself to ground under the control of relay Vrr and establishes the circuits for the second signal receiver.
  • the register must respond accordingly, e. g. by efiecting of an additional selector setting. This starts only if a second alternating current test and the direct current test are successful. These operations take place in the same way as described above.
  • relay Dir After the operation of relay Dir, not relay Sar, but relay Vtsr operates and locks itself independently of Vtzr via the front contact of relay Dtr and energizes relay Vrr. The latter releases all other relays, except relay Str, which remains operated via a front contact of relay Vtzr, so that the relays T1 and Dtr may release only if the free test potential on the seized outlet is opened. Then these relays will release, as will also Vtar, Vrr and Sir and a next selector setting may start. As relay Or was energized via a front contact of relay Vtar, the conditions for this selector setting under the control of relay Or are changed. The seized bypass selector may choose an outlet which leads to the desired group.
  • relay Kz'r responds in the known way, and by means of relay Vrr causes the hunting movement to start anew. Relay Vtzr is then also de-energized by relay Vrr.
  • relay W121 switches the elements of the second signal receiver in such a way that tube B2 may now only respond in the absence of signaling current, i. e. as soon as the selector switch has left the contact of the seized alternative outlet. The balance of the operations take place in the same way as des crlbed above.
  • a variably operable register switch a plurality of selector switches variabl operable in accordance with the operation of said register, each selector having an operating magnet, a control circuit therefor, a plurality of multi-electrode discharge tubes in the register, a first one of said tubes having electrodes in said control circuit, a circuit for controlling a second one of said tubes controlled by the selector, and a control circuit for the first tube controlled by the second tube.
  • control circuit of the magnet includes in series the discharge space of the first tube, the operation of a selector being started by the ionization of the discharge space, a grid in the first tube controlling th discharge space, and a condenser connected to said grid.
  • a variably operable register switch a plurality of selector switches variably operable in accordance with the operation of said register, each selector having an operating magnet, a control circuit therefor, a plurality of discharge tubes in the register, each tube having a cathode and an anode electrode and a grid controlling the discharge path between said electrodes, a first one of said tubes controlling said control circuit in which the discharge path is included in series, a condenser connected with the grid of the first tube, a circuit for controlling the grid of a second one of said tubes controlled by the selector, and a circuit controlling the charging of said condenser controlled by the second tube.
  • control circuit of the magnet includes a resistance, and a condenser in parallel with said resistance.
  • control circuit of the magnet includes the magnet winding, and in series therewith a resistance and the anode and cathode of the first tube, and a condenser in parallel with said resistance.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Keying Circuit Devices (AREA)
US486275A 1941-07-11 1943-05-08 Register switch utilizing a plurality of discharge tubes Expired - Lifetime US2447495A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL2447495X 1941-07-11
NL883978X 1941-07-11
GB17423/43A GB568476A (en) 1941-07-11 1943-10-22 Improvements in or relating to the control of selectors such as used in automatic telephony

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US2447495A true US2447495A (en) 1948-08-24

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US486275A Expired - Lifetime US2447495A (en) 1941-07-11 1943-05-08 Register switch utilizing a plurality of discharge tubes

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US (1) US2447495A (fr)
FR (1) FR883978A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553553A (en) * 1942-09-07 1951-05-22 Int Standard Electric Corp Selector switching system
US2744162A (en) * 1949-06-24 1956-05-01 Int Standard Electric Corp Selection system for electrical circuits or equipments
US3236953A (en) * 1959-04-10 1966-02-22 Ass Elect Ind Register-translator apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL56430C (fr) *
US2285815A (en) * 1940-10-17 1942-06-09 Bell Telephone Labor Inc Signaling system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL56430C (fr) *
US2285815A (en) * 1940-10-17 1942-06-09 Bell Telephone Labor Inc Signaling system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2553553A (en) * 1942-09-07 1951-05-22 Int Standard Electric Corp Selector switching system
US2744162A (en) * 1949-06-24 1956-05-01 Int Standard Electric Corp Selection system for electrical circuits or equipments
US3236953A (en) * 1959-04-10 1966-02-22 Ass Elect Ind Register-translator apparatus

Also Published As

Publication number Publication date
FR883978A (fr) 1943-07-28

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