GB609414A - Improvements in control circuits for x-ray apparatus - Google Patents
Improvements in control circuits for x-ray apparatusInfo
- Publication number
- GB609414A GB609414A GB786846A GB786846A GB609414A GB 609414 A GB609414 A GB 609414A GB 786846 A GB786846 A GB 786846A GB 786846 A GB786846 A GB 786846A GB 609414 A GB609414 A GB 609414A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- valve
- tube
- screening
- closure
- 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
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
- H05G1/58—Switching arrangements for changing-over from one mode of operation to another, e.g. from radioscopy to radiography, from radioscopy to irradiation or from one tube voltage to another
Landscapes
- X-Ray Techniques (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
609,414. Control systems for X-ray apparatus. PHILIPS LAMPS, Ltd. March 13, 1946, No. 7868. Convention date, March 15, 1945. [Class 38 (iv)] [Also in Group XXXVII] In X-ray apparatus having separate controls for adjusting the tube loading for screening and photographing, respectively, a further control is provided whereby, during screening, the tube loading may be increased for a limited period which is preferably dependent on the initial screening current. As shown in Fig. 1, the filament heating transformer 1 for a tube 2 includes in its primary circuit a tapped resistor 3, a portion of which may temporarily be short-circuited by a mercury switch 4 to increase the tube loading. Switch 4 (see Group XXXVII) is tilted from its normal position, in which its contacts are open, by electromagnetic actuating mechanism 14, 15 upon closure of a button 16. Release of the button returns the switch to its initial position, the mercury flowing back over a different path and closing the switch contacts whilst doing so. In the arrangement shown in Fig..3, the switch 4 is controlled by a valve 17 and condenser 20, the valve being normally biassed back by a battery 23 so that the switch-operating coil 18 in the anode circuit of the valve is de-energized. Closure of button 19 shorts the biassing circuit so that the valve conducts and the switch coil is energized. Auxiliary contacts 21 break the short-circuit and the bias voltage again builds upon on the grid of the valve at a rate determined by the values of a resistor 22 and capacitor 20. A portion of resistor 22 is constituted by a rheostat which is ganged with another rheostat 25 controlling the normal screening current, so that the period of closure of switch 4 is determined by the normal screening current. Switch 30 provides an independent control of normal screening current. Ganged change-over switches 26-29 are thrown to alter the tube supply circuits for radiography, the loading then being controlled by switches 31, 32.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE458358A BE458358A (en) | 1945-03-15 | 1945-03-15 | X-ray machine with separate controls for fluoroscopy and radiography |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB609414A true GB609414A (en) | 1948-09-30 |
Family
ID=40510025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB786846A Expired GB609414A (en) | 1945-03-15 | 1946-03-13 | Improvements in control circuits for x-ray apparatus |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE458358A (en) |
| FR (1) | FR923793A (en) |
| GB (1) | GB609414A (en) |
| NL (1) | NL70880C (en) |
-
1945
- 1945-03-15 BE BE458358A patent/BE458358A/en unknown
-
1946
- 1946-03-12 NL NL124027A patent/NL70880C/en active
- 1946-03-13 FR FR923793D patent/FR923793A/en not_active Expired
- 1946-03-13 GB GB786846A patent/GB609414A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR923793A (en) | 1947-07-17 |
| BE458358A (en) | 1945-09-15 |
| NL70880C (en) | 1952-10-15 |
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