GB1331562A - Electronic flash unit - Google Patents

Electronic flash unit

Info

Publication number
GB1331562A
GB1331562A GB1841172A GB1841172A GB1331562A GB 1331562 A GB1331562 A GB 1331562A GB 1841172 A GB1841172 A GB 1841172A GB 1841172 A GB1841172 A GB 1841172A GB 1331562 A GB1331562 A GB 1331562A
Authority
GB
United Kingdom
Prior art keywords
flash
discharge
flash tube
capacitor
counter voltage
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
GB1841172A
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.)
MULTIBLITZ MANNESMANN CO GmbH Co
Original Assignee
MULTIBLITZ MANNESMANN CO GmbH Co
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
Application filed by MULTIBLITZ MANNESMANN CO GmbH Co filed Critical MULTIBLITZ MANNESMANN CO GmbH Co
Publication of GB1331562A publication Critical patent/GB1331562A/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
    • H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
    • H05B41/32—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation
    • H05B41/325—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation by measuring the incident light

Landscapes

  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

1331562 Electronic flash control MULTIBLITZ DR ING D A MANNESMANN GmbH & CO K G 20 April 1972 [28 April 1971] 18411/72 Heading G2A An electronic flash unit has a flash tube 12, a charge storage capacitor 10, and means for feeding a counter voltage into the discharge circult to quench the flash tube as controlled by a photo-electric detector 24 receiving light reflected from the object and connected to an integrating element 26, wherein a diode 14 is connected in series with the flash tube in the discharge circuit and conducts only in the direction of the discharge current. The counter voltage is produced by triggering a thyristor 20 so that an auxiliary capacitor 18 is discharged through a resistor 16 common with the flash discharge circuit. If the voltage across the charge storage capacitor 10 has been reduced substantially by the flash discharge, the diode 14 prevents any possibility of the auxiliary discharge current being conducted through the flash tube during its deionization period and a further flash is prevented. The values of the capacitor 18 and the resistor 16 are so chosen that the counter voltage is maintained for a period sufficient for the deionization of the flash tube.
GB1841172A 1971-04-28 1971-04-19 Electronic flash unit Expired GB1331562A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712120773 DE2120773A1 (en) 1971-04-28 1971-04-28 Electronic flash unit

Publications (1)

Publication Number Publication Date
GB1331562A true GB1331562A (en) 1973-09-26

Family

ID=5806174

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1841172A Expired GB1331562A (en) 1971-04-28 1971-04-19 Electronic flash unit

Country Status (7)

Country Link
CA (1) CA945621A (en)
DE (1) DE2120773A1 (en)
ES (1) ES402014A1 (en)
FR (1) FR2136831A5 (en)
GB (1) GB1331562A (en)
IT (1) IT953805B (en)
NL (1) NL7205516A (en)

Also Published As

Publication number Publication date
FR2136831A5 (en) 1972-12-22
ES402014A1 (en) 1975-03-01
DE2120773A1 (en) 1972-11-09
CA945621A (en) 1974-04-16
IT953805B (en) 1973-08-10
NL7205516A (en) 1972-10-31

Similar Documents

Publication Publication Date Title
GB1225916A (en)
GB1422401A (en) Yarn break detector
GB1472941A (en) Emergency alarm systems
FR2231971B1 (en)
GB1331562A (en) Electronic flash unit
GB1490866A (en) Light responsive detectors
GB1199516A (en) Automatic Welding System.
GB1295204A (en)
GB1374247A (en)
GB1409381A (en) Thyristor circuit
GB1346247A (en) Vertical synchronizing system
GB1373787A (en) Improvements realting to the control of motor vehicle change-speed gearing
GB1159580A (en) Light Meter for High Powered Repetitive Light Flashes
GB1307244A (en) Arrangement provided with a discharge flash tube
GB1331328A (en) Electronic flashlight units
GB1314907A (en) Control of electronic flashlight apparatus
GB1407310A (en) Electronic flash apparatus
GB1396685A (en) Electronic flash gun for photographic picture-taking purposes
GB1354791A (en) Supply circuits for flash tubes
GB1449219A (en) Electronic thread regulator for textile machines
GB1033285A (en) Circuit arrangement for spark erosion equipment
SU515205A1 (en) Device to protect a stabilized DC voltage source
GB1201597A (en) Controlled rectifier inverter circuits
GB1281386A (en) Circuit for the photo electric ignition of an electronic flash tube
GB1200351A (en) Improvements in and relating to radiation detector circuits

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees