GB557121A - Improvements in or relating to radiography - Google Patents
Improvements in or relating to radiographyInfo
- Publication number
- GB557121A GB557121A GB1091942A GB1091942A GB557121A GB 557121 A GB557121 A GB 557121A GB 1091942 A GB1091942 A GB 1091942A GB 1091942 A GB1091942 A GB 1091942A GB 557121 A GB557121 A GB 557121A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- frame
- springs
- oscillated
- plane
- 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
Links
- 238000002601 radiography Methods 0.000 title abstract 2
- 230000010355 oscillation Effects 0.000 abstract 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
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
557,121. R÷ntgen-ray apparatus. WATSON, W., and ILFORD, Ltd. Aug. 5, 1942, No. 10919. [Class 98 (i)] The Potter-Bucky or like grid used in radiography is connected with one or more spring members so that it may be oscillated in the plane of the grid bars and in a direction inclined to them by flexing and releasing the members, the oscillations thus produced dying away and so avoiding the formation of shadow patterns of the grid at the ends of its movement which occurs when the oscillations are of constant amplitude. In the form shown a rectangular grid 14 is carried by a frame 13 supported by leaf springs 11 from a base 10 which carries the film cassette. The springs are flexed and released mechanically or manually, for example by a cord secured to one of them, and oscillate the frame 13 in a diagonal direction. The grid may be inserted in the frame in two angularly related, as shown mutually perpendicular, positions. In another form, the grid is carried by a turntable mounted in the frame, and in order that the direction of oscillation may be maintained transverse to that of the grid bars, however the grid is oriented, the leaf springs 11 are connected to the frame by ball joints and are secured at their lower ends to spindles mounted on the base 10. The spindles are simultaneously rotatably adjusted by sprockets engaged by a common sprocket chain, thus maintaining the flat surfaces of the springs in parallel planes. Fig. 4 shows electrical means for giving intermittent impulses to the springs during a long exposure, comprising a solenoid 34 the energizing circuit of which is controlled by contacts of which one is mounted on the spring 11 which it operates, and by a valve 39 which becomes intermittently conductive at periods determined by the build-up of potential in a condenser resistance circuit 43, 40. The grid may comprise two superposed and mutually inclined sets of grid bars. Two superposed grids having their sets of grid bars mutually inclined may be independently oscillated in opposite directions ; they may be arranged in a vertical plane and oscillated in a substantially horizontal direction in this plane.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1091942A GB557121A (en) | 1942-08-05 | 1942-08-05 | Improvements in or relating to radiography |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1091942A GB557121A (en) | 1942-08-05 | 1942-08-05 | Improvements in or relating to radiography |
Publications (1)
Publication Number | Publication Date |
---|---|
GB557121A true GB557121A (en) | 1943-11-04 |
Family
ID=9976702
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1091942A Expired GB557121A (en) | 1942-08-05 | 1942-08-05 | Improvements in or relating to radiography |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB557121A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2317546A (en) * | 1996-08-21 | 1998-03-25 | Siemens Ag | Screen holder for X-ray diagnostics system |
FR2855276A1 (en) * | 2003-05-22 | 2004-11-26 | Ge Med Sys Global Tech Co Llc | Anti-diffusion grid for X-ray apparatus has metallised layers with expanded polymer plate on at least one surface |
-
1942
- 1942-08-05 GB GB1091942A patent/GB557121A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2317546A (en) * | 1996-08-21 | 1998-03-25 | Siemens Ag | Screen holder for X-ray diagnostics system |
US5809107A (en) * | 1996-08-21 | 1998-09-15 | Siemens Aktiengesellschaft | Catapult grid drawer with means for preventing incorrect insertion of anti-scatter grid into drawer receptacle |
GB2317546B (en) * | 1996-08-21 | 2000-04-05 | Siemens Ag | Screen holding device |
FR2855276A1 (en) * | 2003-05-22 | 2004-11-26 | Ge Med Sys Global Tech Co Llc | Anti-diffusion grid for X-ray apparatus has metallised layers with expanded polymer plate on at least one surface |
US7430281B2 (en) | 2003-05-22 | 2008-09-30 | Ge Medical Systems Global Technology Co. Llc | Anti-scatter grid with mechanical resistance |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
NO147447C (en) | NEW DICARBOXYLIC ACID-BIS- (3,5-DICARBAMOYL-2,4,6-TRYODANANIDES) FOR USE AS A SHADOW-LIFTING COMPONENT IN ROENTIC CONTRAST AGENTS CONTAINING THE SAME COMPOUND | |
ES188211U (en) | A mounting plate to build electric and electronic circuits. (Machine-translation by Google Translate, not legally binding) | |
GB870831A (en) | Improvements in and relating to electrical apparatus using sockets | |
GB557121A (en) | Improvements in or relating to radiography | |
IT1067934B (en) | FLAT TYPE ELECTRONIC BEAM ADDRESSED DEVICE | |
NO874271L (en) | Herbicidal composition. | |
ES311010A1 (en) | Improvements in the manufacture of somieres of the type called tapicero. (Machine-translation by Google Translate, not legally binding) | |
GB793785A (en) | Improvements in or relating to means for mounting electrical components | |
ES338712A1 (en) | An apparatus intended for use to electrocutate insects. (Machine-translation by Google Translate, not legally binding) | |
DE386883C (en) | Device for influencing an electrical oscillating circuit | |
SU652746A1 (en) | Radio electronic apparatus unit | |
SU495391A1 (en) | Suspension for electroplating parts | |
GB255185A (en) | Transmission of pictures or the like by electricity | |
JPS5315091A (en) | Shock-proof structure of crystal | |
GB686514A (en) | Improvements in and relating to resilient mountings | |
SU41078A1 (en) | Oscilloscope-type electrical measuring instrument | |
GB891193A (en) | Improvements in method and means for making soldered joints | |
IT7908916V0 (en) | OSCILLATING SCREW-SIEVE, OPERATED BY ELECTROMAGNET IN ELECTRONIC CIRCUIT | |
JPS5240323A (en) | Manufacturing process of speaker diaphragm | |
JPS524269A (en) | Crystal wrist watch with static shield plate | |
GB923426A (en) | A mechanism for detaching a dust coating from a fabric surface | |
GB191411023A (en) | Improvements in Toys. | |
GB857975A (en) | Improvements in and relating to electrical valve sockets | |
JPS524827A (en) | Electronic programmed shutter circuit | |
JPS51146116A (en) | Television receiving apparatus |