US2617081A - Arrangement for igniting two or more gas- or vapor-filled main discharge tubes - Google Patents

Arrangement for igniting two or more gas- or vapor-filled main discharge tubes Download PDF

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Publication number
US2617081A
US2617081A US257744A US25774451A US2617081A US 2617081 A US2617081 A US 2617081A US 257744 A US257744 A US 257744A US 25774451 A US25774451 A US 25774451A US 2617081 A US2617081 A US 2617081A
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United States
Prior art keywords
ignition
cathode
main
transformer
tubes
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US257744A
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English (en)
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Fortuyn Koenraad Droogleever
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Hartford National Bank and Trust Co
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Hartford National Bank and Trust Co
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/02—Circuits specially adapted for the generation of grid-control or igniter-control voltages for discharge tubes incorporated in static converters

Definitions

  • This invention relates to an arrangement for igniting two or more gasor vapour-filled main discharge tubes having a cold, for example, mercury cathode, each tube provided with an immersed ignition electrode, in which of the two types of ignition members the corresponding ones are directly or indirectly interconnected, each ignition circuit including a source of ignition voltage and a separate, controllable gasor vapour-filled auxiliary discharge path for determining the instant of ignition, and the discharge paths of each ignition circuit being united into a single multi-anode discharge tube having a single cathode.
  • the term two types of ignition members is to be understood to mean on the one hand the immersed ignition electrodes and on the other hand the associated cold cathodes.
  • the multi-anode auxiliary discharge tube has a single cathode
  • the use of coupling transformers between the anode circuits of this tube and the control circuits of the main discharge tubes is necessary for the transmission of the control voltages for separating the individual ignition circuits of the main discharge tubes.
  • this usually requires a number of dry or wet rectifier elements in the ignition circuit to prevent the flow of return current through the ignition electrode, since the coupling transformers secondarily supply an alternating voltage to the ignition circuit.
  • each ignition circuit comprises a separate transformer, one winding of which is connected in the anode lead and the other winding, which is connected in series therewith, is inserted in the cathode lead of each auxiliary discharge path such that upon the passage of current the total impedance of the two windings is different from, preferably smaller than, the impedance of one of the two windings.
  • a connection may be made in which the ampereturns of the windings are oppositely directed with respect to each other.
  • the transformation ratio is preferably at least approximately 1: 1, since the compensation is then practically complete.
  • the total impedance of the two windings may consequently be chosen much lower than the impedance of one of the windings, only this ignition circuit will carry a sufficient current to ensure ignition of the main discharge tube concerned. Due to the much greater impedance of the remaining transformers, the current carried off through the common lead of ignition members of the same name cannot acquire such a value as to bring about ignition of another main discharge tube.
  • the transformers fundamentally do not act as such, so that no secondary alternating voltage whose undesirable action must be prevented by means of additional rectifiers in the ignition circuits is supplied, as is the case in the aforesaid known arrangements.
  • the transformers only act as automatically operating devices which, according to convenience, have a high or low impedance, i. e., a self-regulating impedance value.
  • the ignition circuits include transformers, whose magnetic circuits are saturated to a greater or less degree on the passage of current. Since also in this case the total impedance of the transformer has relatively much decreased, because the remaining transformers are not saturated, the path through the other transformers will now also be cut off to a greater or less degree. The two windings of the saturated transformer will only have a low impedance. In this event, the ampereturns of the two transformer windings need not necessarily be oppositely directed.
  • Fig. 1 shows three gasor vapor-filled main discharge tubes l, 2, 3, which may, for example, be connected as a rectifier and comprise cathodes 4, 5, 6 and immersed ignition electrodes 1, 8, 9, constituting the aforesaid two types of ignition members.
  • the cathodes are interconnected.
  • the ignition circuits comprise sources of ignition voltages in the form of charge capacitors IO, H, 12 and controllable gasor vapor-filled main discharge paths l3, i4, i5.
  • These auxiliary discharge paths having separate anodes it, ii, I8 and associated control members i9, 2t, 2! are united into a single multi-anode discharge tube 22 having a common cathode 23.
  • each ignition circuit comprises separate transformers 2d, 25, 2s, one winding of which (27, 28, 29) is connected in the anode lead and the other winding (3t, 3!, 32) is connected, in series therewith, in the cathode lead of each auxiliary discharge path (i3, I4, I5) with respect to the loads Ii, 'i5, 8-6, 9 (the ignition members).
  • the auxiliary discharge path is rendered conductive by supplying a voltage impulse to the control member I 9, the voltage across the'capacitor it will cause an electron current to flow through winding 21, cathode 4, ignition electrode 7, winding and back to the cathode 23 of the auxiliary discharge tube 22.
  • the cathodes 5, t the ignition electrodesfi, 9 and the windings 35,32 back to the cathode 23 of the auxiliary discharge tube is reduced to a; low inoffensive magnetization currentstrength, since due to the currentless windings 28 and 29 (the auxiliary discharge paths id and I5 not conductive) the impedances'25 and 26 will have a relatively high value.
  • the iron-circuit of transformers 2d, 25, 23 is so proportioned as to be saturated as a result of the passage of current through the winding connected to the condenser (when the capacitor becomes discharged), it fundamentally is not necessary for the ampere-turns of the two windings of each transformer to be oppositely directed or for the transformation ratio to be 1:1. Due to saturation of the iron-circuit of the transformer concerned the impedance of the two windings will only be low, whereas the nonsaturated transformers automatically prevent any undesirable passage of current.
  • the capacitors H H, l2 need not necessarily be charged with direct voltage.
  • the discharge it is in general necessary for the discharge to occur at an instant at which'the anode concerned of the auxiliary discharge paths is positive.
  • the capacitor is charged with direct voltage and discharged at a threefold frequency. Otherwise, this arrangement operates similarly to that shown in Fig. 1.
  • the capacitor is charged with direct voltage and discharged at a threefold frequency.
  • capacitor 33 may be inserted in the common cathode lead of the auxiliary discharge tube 22 as shown in dash lines at 33.
  • Fig. :3 shows an embodiment in which, instead of the cathodes, the ignition electrodes 'of the '4 main discharge tubes are interconnected.
  • the capacitor 33 may be connected either in the cathode lead of the auxiliary discharge tube 22 or in the common lead of the ignition electrodes 33.
  • Apparatus for selectively igniting a plurality of main gaseous discharge tubes each of which has an immersed ignition electrode and a cold cathode, the cathodes of said main tubes being interconnected said apparatus comprising an auxiliary discharge tube provided with a like plurality of anodes and a common cathode to define a separate discharge path between each anode and the common cathode, an ignition circuit coupled to each main tube and including an ignition voltage source, a transformer having first and second windings and a respective discharge path within said auxiliary tube, said first winding being connected in series with said source and said second winding between the ignition electrode of the related main tube and said cathode interconnection, and means to ignite each of said discharge paths thereby to effect ignition of the related main tube, said transformer having a characteristic at which the impedance of the series-connected windings when ignition current flows therethrough is'less than the impedance of either winding inthe absence of ignitioncurrent flow, whereby whenany of the main tubes is ignited accidental ignition of the remaining
  • Apparatus for selectively igniting a plurality of main gaseous discharge tubes each of which has an immersed ignition electrode and a cold cathode, the ignition electrodes of said main tubes being interconnected said apparatus comprising an auxiliary discharge tube provided with a like plurality of anodes and a common cathode to define a separate discharge path between each anode and the common cathode, an ignition voltage source, an ignition circuit coupled to each main tube and including a transformer having first and second windings and a respective discharge path within said auxiliary tube, said first winding being connected in series with said source and said second winding between the ignition electrode of the related main tube and said cathode interconnection, and means to ignite each of said discharge paths thereby to effect ignition of the related main tube, said transformer having a characteristic at which the impedance of the series-connected windings when ignition current flows therethrough is less than the impedance of either winding in the absence of ignition current flow, whereby when any of the main tubes is ignited accidental ignition of the remaining tubes is
  • Apparatus for selectively igniting a plurality of main gaseous discharge tubes each of which has an immersed ignition electrode and a cold cathode, the cathodes of said main tubes being interconnected said apparatus comprising an auxiliary discharge tube provided with a like plurality of anodes and a common cathode to define a separate discharge path between each anode and the common cathode, a series circuit in parallel with the electrode and cathode of each tube and including an inductance and a compensation transformer, an ignition circuit coupled to each main tube and including an ignition voltage source, a transformer having first and second windings and a respective discharge path within said auxiliary tube, said first winding being connected in series with said source and said second winding between the ignition electrode of the related main tube and said cathode interconnection, and means to ignite each of said discharge paths thereby to effect ignition of the related main tube, said transformer having a characteristic at which the impedance of the series-connected windings when ignition current flows therethrough is less than the impedance

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
US257744A 1950-12-13 1951-11-23 Arrangement for igniting two or more gas- or vapor-filled main discharge tubes Expired - Lifetime US2617081A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL301209X 1950-12-13

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US2617081A true US2617081A (en) 1952-11-04

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US257744A Expired - Lifetime US2617081A (en) 1950-12-13 1951-11-23 Arrangement for igniting two or more gas- or vapor-filled main discharge tubes

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US (1) US2617081A (en(2012))
BE (1) BE507745A (en(2012))
CH (1) CH301209A (en(2012))
FR (1) FR1046297A (en(2012))
GB (1) GB715904A (en(2012))
NL (1) NL82257C (en(2012))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3274441A (en) * 1961-10-09 1966-09-20 Benedik Fedor Sequential electrical lighting arrangement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3274441A (en) * 1961-10-09 1966-09-20 Benedik Fedor Sequential electrical lighting arrangement

Also Published As

Publication number Publication date
GB715904A (en) 1954-09-22
FR1046297A (fr) 1953-12-04
BE507745A (en(2012))
NL82257C (en(2012))
CH301209A (de) 1954-08-31

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