GB234808A - Signalling devices employing mercury vapour lamps - Google Patents

Signalling devices employing mercury vapour lamps

Info

Publication number
GB234808A
GB234808A GB13533/25A GB1353325A GB234808A GB 234808 A GB234808 A GB 234808A GB 13533/25 A GB13533/25 A GB 13533/25A GB 1353325 A GB1353325 A GB 1353325A GB 234808 A GB234808 A GB 234808A
Authority
GB
United Kingdom
Prior art keywords
electrode
current
phase
voltage
luminosity
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
Application number
GB13533/25A
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.)
Societe de Recherches et de Perfectionnements Industriels SRPI
Original Assignee
Societe de Recherches et de Perfectionnements Industriels SRPI
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 claimed from DET27285D external-priority patent/DE415910C/en
Application filed by Societe de Recherches et de Perfectionnements Industriels SRPI filed Critical Societe de Recherches et de Perfectionnements Industriels SRPI
Publication of GB234808A publication Critical patent/GB234808A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/39—Controlling the intensity of light continuously
    • H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
    • H05B41/3921—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor with possibility of light intensity variations
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F21/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement 
    • D06F21/02—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement  about a horizontal axis
    • 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
    • H02M1/04—Circuits specially adapted for the generation of grid-control or igniter-control voltages for discharge tubes incorporated in static converters for tubes with grid control
    • H02M1/042—Circuits specially adapted for the generation of grid-control or igniter-control voltages for discharge tubes incorporated in static converters for tubes with grid control wherein the phase of the control voltage is adjustable with reference to the AC voltage
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M7/15—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using discharge tubes only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/66—Transforming electric information into light information

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Textile Engineering (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
  • Optical Communication System (AREA)

Abstract

234,808. Toulon, P. M. G., and Soc. de Recherches et de Perfectionnements. Industriels. May 27, 1924, [Convention date]. Addition to 209,426, [Class 30 (i), Electric lamps, Arc &c.]. Optical apparatus. - The parent Specification and Specification 209,096, [Class 39 (i), Electric lamps, Arc &c.], describe a mercury vapour lamp in which ionization is kept up by a continuouslyapplied potential difference between mercury electrodes 5, 6 and the current between the electrodes 5, 3 is controlled by varying the potential of an exterior electrode 12.. According to the present invention, the variations in the luminosity of the mercury lamp may be employed, inter alia, for transmitting speech in a photophone system, a photographic sound record being produced at the receiving station. In the arrangement shown in Fig. 3, the intensity of the light beam 40 fluctuates in accordance with speech currents through the microphone 24, a screen 39 being employed if desired to cut out the visible spectrum. At the receiving station the light-fluctuations are translated into sound by a photo-electric cell, or are photographically recorded. Alternating current of fairly high frequency is supplied at 31 so that through the transformer secondary 32<1> an alternating voltage is applied between the electrodes 3, 5. Another secondary 32<11> is arranged in the plate circuit of a valve 27 together with a choke coil 36<1> which causes the plate current to lag by nearly 90‹ behind the voltage applied to the electrode 3. A further secondary 32<111> supplies current to a resistance 37, this current being substantially in phase with the applied E.M.F. The resistances 37, 30 are connected in series between the cathode 5 and control electrode 12, so that the voltage applied to the latter is the vector sum of the voltage drops in the resistances 37, 30. Hence the voltage of the electrode 12 differs in phase from that of the electrode 3 by an amount depending on the relative strengths of the currents in the resistances 37, 30 since these differ from one another in phase by about 90‹. Thus the microphone 24, which controls the strength of the component in 30. thereby controls the phase in 12, and so varies the luminosity of the lamp. The variations in luminosity may be recorded photographically so as to produce a sound record.
GB13533/25A 1923-01-05 1925-05-23 Signalling devices employing mercury vapour lamps Expired GB234808A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DET27285D DE415910C (en) 1923-01-05 1923-01-05 Arrangement for regulating the current in arc rectifiers
FR29701T 1924-05-27

Publications (1)

Publication Number Publication Date
GB234808A true GB234808A (en) 1926-08-23

Family

ID=8667681

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13533/25A Expired GB234808A (en) 1923-01-05 1925-05-23 Signalling devices employing mercury vapour lamps

Country Status (3)

Country Link
DE (2) DE506663C (en)
FR (1) FR29701E (en)
GB (1) GB234808A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE940417C (en) * 1944-08-20 1956-03-15 Interessengemeinschaft Fuer Ru Powerless controlled gas discharge tubes

Also Published As

Publication number Publication date
FR29701E (en) 1925-09-21
DE506663C (en) 1930-09-08
DE469815C (en) 1928-12-27

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