GB485821A - Apparatus for screening out secondary x-rays - Google Patents

Apparatus for screening out secondary x-rays

Info

Publication number
GB485821A
GB485821A GB21485/37A GB2148537A GB485821A GB 485821 A GB485821 A GB 485821A GB 21485/37 A GB21485/37 A GB 21485/37A GB 2148537 A GB2148537 A GB 2148537A GB 485821 A GB485821 A GB 485821A
Authority
GB
United Kingdom
Prior art keywords
grid
rack
opposite directions
out secondary
screening out
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
GB21485/37A
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.)
ERVIN OTVOES
Original Assignee
ERVIN OTVOES
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 ERVIN OTVOES filed Critical ERVIN OTVOES
Publication of GB485821A publication Critical patent/GB485821A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
    • G21K1/02—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators
    • G21K1/025—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating using diaphragms, collimators using multiple collimators, e.g. Bucky screens; other devices for eliminating undesired or dispersed radiation

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Apparatus For Radiation Diagnosis (AREA)

Abstract

485,821. R÷ntgen - ray diaphragms. OTVOS, E. Aug. 4, 1937, No. 21485. Convention date, Jan. 7. [Class 98 (i)] A Bucky grid for screening out secondary rays is provided with a pair of parallel toothed racks engaged alternately by a driven toothed segment so that it is reciprocated with uniform speed in opposite directions, and the direction of its movement at each end of its path is reversed so suddenly that undesired shadow lines are not produced. A second grid, parallel with the first, may be coupled to the first grid so that the two grids move with equal speed but in opposite directions. As shown, a grid 2 carries a fixed rack 6 and a rack 7 supported on a laminated spring 5. Meshing alternately with the racks is a continuously-driven toothed segment 8 preferably of such angle that it begins to engage one rack just before it has completely disengaged from the other. When a second grid 1 also is used, reverse movement is communicated to it from grid 2 by rack and pinion gear 3, 4.
GB21485/37A 1937-01-07 1937-08-04 Apparatus for screening out secondary x-rays Expired GB485821A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE485821X 1937-01-07

Publications (1)

Publication Number Publication Date
GB485821A true GB485821A (en) 1938-05-25

Family

ID=6543336

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21485/37A Expired GB485821A (en) 1937-01-07 1937-08-04 Apparatus for screening out secondary x-rays

Country Status (1)

Country Link
GB (1) GB485821A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0238866A1 (en) * 1986-02-25 1987-09-30 General Electric Company Method of aligning a collimator to a linear array x-ray detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0238866A1 (en) * 1986-02-25 1987-09-30 General Electric Company Method of aligning a collimator to a linear array x-ray detector

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