GB706671A - Improvements in or relating to timing devices for use with x-rays and other penetrating radiations - Google Patents

Improvements in or relating to timing devices for use with x-rays and other penetrating radiations

Info

Publication number
GB706671A
GB706671A GB16088/52A GB1608852A GB706671A GB 706671 A GB706671 A GB 706671A GB 16088/52 A GB16088/52 A GB 16088/52A GB 1608852 A GB1608852 A GB 1608852A GB 706671 A GB706671 A GB 706671A
Authority
GB
United Kingdom
Prior art keywords
relay
photo
resistor
condenser
tube
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
GB16088/52A
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.)
Westinghouse Electric International Co
Original Assignee
Westinghouse Electric International 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 Westinghouse Electric International Co filed Critical Westinghouse Electric International Co
Publication of GB706671A publication Critical patent/GB706671A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05G—X-RAY TECHNIQUE
    • H05G1/00—X-ray apparatus involving X-ray tubes; Circuits therefor
    • H05G1/08—Electrical details
    • H05G1/26—Measuring, controlling or protecting
    • H05G1/30—Controlling
    • H05G1/38—Exposure time
    • H05G1/42—Exposure time using arrangements for switching when a predetermined dose of radiation has been applied, e.g. in which the switching instant is determined by measuring the electrical energy supplied to the tube
    • H05G1/44—Exposure time using arrangements for switching when a predetermined dose of radiation has been applied, e.g. in which the switching instant is determined by measuring the electrical energy supplied to the tube in which the switching instant is determined by measuring the amount of radiation directly

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • X-Ray Techniques (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

706,671. Photo-electric control of X-ray dosage. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. June 26, 1952 [Aug. 16, 1951], No. 16088/52. Class 40 (3) X-ray dosage is controlled by an image intensifier the photo-electric current of which is used to control the radiation source and/or photographic apparatus. As shown closing of a manual switch 15 energizes relay 19 and 12. Relay 12 energizes the X-ray supply transformer 11 and sets in operation the automatic shutter of a camera 6. The X-rays, after passing through the object under examination are received on a zinc sulphide screen 3 which is separated by a thin sheet of glass from a photo-emissive screen of antimony. At the opposite end of the intensifier is an output screen which may be of zinc cadmium sulphide. The photo-electric current passes through a resistor 7 the drop across which controls the bias of a tube 22 the anode of which is supplied through resistors 17 and 21 and normally open contacts of relay 19. A resistor 25 and condenser 26 are parallel with resistor 21 so that the condenser charges at a rate dependent on the photo-electric current in the image intensifier. When the condenser potential achieves a predetermined value a gas discharge tube 16 which derives its supply voltage from the drop in resistor 17 fires and operates a relay 14. This relay de-energizes the transformer 11 and switches off the automatic shutter. The circuit is restored by opening switch 15 when relay 19 short circuits condenser 26 and cuts off the supply through resistor 17 to tube 22. In consequence the tube 16 is also cut off.
GB16088/52A 1951-08-16 1952-06-26 Improvements in or relating to timing devices for use with x-rays and other penetrating radiations Expired GB706671A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US242141A US2853619A (en) 1951-08-16 1951-08-16 Image amplifier phototimer

Publications (1)

Publication Number Publication Date
GB706671A true GB706671A (en) 1954-03-31

Family

ID=22913612

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16088/52A Expired GB706671A (en) 1951-08-16 1952-06-26 Improvements in or relating to timing devices for use with x-rays and other penetrating radiations

Country Status (4)

Country Link
US (1) US2853619A (en)
BE (1) BE513475A (en)
FR (1) FR1081108A (en)
GB (1) GB706671A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3166674A (en) * 1960-10-28 1965-01-19 Wick Richard Time switch for photographic apparatus
US3198947A (en) * 1961-02-21 1965-08-03 Lab For Electronics Inc Apparatus for producing visual images of x-rayed objects

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302023A (en) * 1964-02-20 1967-01-31 Myron M Schachter Apparatus for producing three-dimensional recordings of fluorescence spectra
US3440422A (en) * 1965-06-24 1969-04-22 Picker Corp Biplane x-ray image system
US3491239A (en) * 1965-09-22 1970-01-20 Gen Electric X-ray image amplifier system with automatic exposure control
US4092537A (en) * 1975-02-12 1978-05-30 Rolls-Royce (1971) Limited Diagnostic apparatus and method for gas turbine engines

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL58644C (en) * 1939-09-28
US2535817A (en) * 1942-09-14 1950-12-26 Nat Union Radio Corp Electrooptical dark trace storage tube
US2401289A (en) * 1943-07-22 1946-05-28 Nasa Photoelectric timer for roentgen photography
US2441324A (en) * 1946-05-15 1948-05-11 Us Sec War Radiation responsive system
US2561085A (en) * 1946-06-01 1951-07-17 Westinghouse Electric Corp Automatic exposure timer
BE484424A (en) * 1947-08-28
US2586392A (en) * 1948-12-09 1952-02-19 Sheldon Edward Emanuel Motion-picture camera for X-ray images
BE496847A (en) * 1949-07-09
US2523132A (en) * 1949-08-10 1950-09-19 Westinghouse Electric Corp Photosensitive apparatus
US2595430A (en) * 1950-04-08 1952-05-06 Kenyon Instr Company Inc Photofluorographic apparatus
BE530458A (en) * 1953-07-17

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3166674A (en) * 1960-10-28 1965-01-19 Wick Richard Time switch for photographic apparatus
US3198947A (en) * 1961-02-21 1965-08-03 Lab For Electronics Inc Apparatus for producing visual images of x-rayed objects

Also Published As

Publication number Publication date
US2853619A (en) 1958-09-23
BE513475A (en) 1952-08-30
FR1081108A (en) 1954-12-16

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