FR1603827A - Relay system for operating radiography tubes - Google Patents

Relay system for operating radiography tubes

Info

Publication number
FR1603827A
FR1603827A FR1603827DA FR1603827A FR 1603827 A FR1603827 A FR 1603827A FR 1603827D A FR1603827D A FR 1603827DA FR 1603827 A FR1603827 A FR 1603827A
Authority
FR
France
Prior art keywords
current
operating
radiography
tubes
relay system
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
Other languages
French (fr)
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 filed Critical
Application granted granted Critical
Publication of FR1603827A publication Critical patent/FR1603827A/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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/28—Modifications for introducing a time delay before switching

Landscapes

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

Abstract

The operation of radiography apparatus requires a control system to ensure that the product of the intensity of the tube current with its operating time is constant. This system, employing an electronic circuit, ensures that this product is constant for a wide range of current intensities. A condenser is charged by the voltage produced across a resistance by the operating current. This voltage is corrected according to the intensity of the current by a circuit containing a transistor, which applies a correction during the use of current intensities of 100 milliamperes.
FR1603827D 1968-02-16 1968-12-18 Relay system for operating radiography tubes Expired FR1603827A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEK0064754 1968-02-16
DE19681789105 DE1789105A1 (en) 1968-02-16 1968-02-16 Electronic mAs relay

Publications (1)

Publication Number Publication Date
FR1603827A true FR1603827A (en) 1971-06-07

Family

ID=25755987

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1603827D Expired FR1603827A (en) 1968-02-16 1968-12-18 Relay system for operating radiography tubes

Country Status (2)

Country Link
DE (1) DE1789105A1 (en)
FR (1) FR1603827A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2440137A1 (en) * 1978-10-25 1980-05-23 Siemens Ag RADIOLOGICAL GENERATOR FOR RADIODIAGNOSTIC APPARATUS COMPRISING A MAS RELAY

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2440137A1 (en) * 1978-10-25 1980-05-23 Siemens Ag RADIOLOGICAL GENERATOR FOR RADIODIAGNOSTIC APPARATUS COMPRISING A MAS RELAY

Also Published As

Publication number Publication date
DE1639288B1 (en) 1971-03-25
DE1789105A1 (en) 1971-12-23

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Legal Events

Date Code Title Description
ST Notification of lapse