GB821106A - Improvements in or relating to radiographic apparatus - Google Patents

Improvements in or relating to radiographic apparatus

Info

Publication number
GB821106A
GB821106A GB1614556A GB1614556A GB821106A GB 821106 A GB821106 A GB 821106A GB 1614556 A GB1614556 A GB 1614556A GB 1614556 A GB1614556 A GB 1614556A GB 821106 A GB821106 A GB 821106A
Authority
GB
United Kingdom
Prior art keywords
tube
voltage
anode
ray tube
condenser
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
GB1614556A
Inventor
Robert Frank Bryer
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.)
General Electric Co PLC
Original Assignee
General Electric Co PLC
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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB1614556A priority Critical patent/GB821106A/en
Publication of GB821106A publication Critical patent/GB821106A/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
    • H05G1/32—Supply voltage of the X-ray apparatus or tube

Abstract

821,106. Automatic control systems for X-ray apparatus. GENERAL ELECTRIC CO. Ltd. May 24, 1957 [May 24, 1956], No. 16145/56. Class 38 (4). In radiographic apparatus means responsive to the radiation emerging from a subject in front of an X-ray tube controls the voltage applied to the anode of the tube. In a mass radiography unit, X-rays passing through a subject give a picture on a fluorescent screen which is photographed and also influences a photo-multiplier tube 6, Fig. 2, to produce across a resistor 8 a voltage dependent on the intensity of illumination. This voltage is applied through a valve amplifier 15 to operate relays such as MR and LR in sequence as required until the voltage applied to the anode of the X-ray tube (not shown) is reduced sufficiently by changing tappings on an autotransformer (not shown) to give a picture of the desired contrast with varying subjects. Tube 6 also charges a condenser 7 until its voltage, representing the integral of light intensity, is sufficient to operate a relay 12 which disconnects the anode supply to the X-ray tube and thereby determines the exposure time. Condenser 7 is discharged before each exposure by a switch 14. Use of saturable reactors instead of valves is referred to.
GB1614556A 1956-05-24 1956-05-24 Improvements in or relating to radiographic apparatus Expired GB821106A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1614556A GB821106A (en) 1956-05-24 1956-05-24 Improvements in or relating to radiographic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1614556A GB821106A (en) 1956-05-24 1956-05-24 Improvements in or relating to radiographic apparatus

Publications (1)

Publication Number Publication Date
GB821106A true GB821106A (en) 1959-09-30

Family

ID=10071999

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1614556A Expired GB821106A (en) 1956-05-24 1956-05-24 Improvements in or relating to radiographic apparatus

Country Status (1)

Country Link
GB (1) GB821106A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1614150B1 (en) * 1966-04-07 1971-07-15 Medicor Muevek X-RAY LIGHTING DEVICE / WITH PHOTOELECTRIC CONVERTER TO SCAN THE ILLUMINATED AREA FOR THE PURPOSE OF DETERMINING THE OPTIMAL VALUES OF X-RAY TUBE VOLTAGE AND CURRENT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1614150B1 (en) * 1966-04-07 1971-07-15 Medicor Muevek X-RAY LIGHTING DEVICE / WITH PHOTOELECTRIC CONVERTER TO SCAN THE ILLUMINATED AREA FOR THE PURPOSE OF DETERMINING THE OPTIMAL VALUES OF X-RAY TUBE VOLTAGE AND CURRENT

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