GB530032A - Improvements in control systems for electron microscopes - Google Patents
Improvements in control systems for electron microscopesInfo
- Publication number
- GB530032A GB530032A GB17443/39A GB1744339A GB530032A GB 530032 A GB530032 A GB 530032A GB 17443/39 A GB17443/39 A GB 17443/39A GB 1744339 A GB1744339 A GB 1744339A GB 530032 A GB530032 A GB 530032A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- june
- transformer
- actuating
- control systems
- 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
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/02—Details
- H01J37/24—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
Landscapes
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
530,032. Control systems for space discharge apparatus. FIDES GES. FUR DIE VERWALTUNG UND VERWERTUNG VON GEWERBLICHEN SCHUTZRECHTEN. June 14, 1939, No. 17443. Convention date, June 14, 1938 [Class 38 (iv)] Switching control.-To prevent the destruction of foils supporting an object in an electron microscope the condenser (focussing) coil is not energized until full operating voltage is on the electron beam. A drum controller 13 closes in sequence the circuits of the following: (1) An illuminating lamp 26, (2) a vacuum tester 10, (3) a coil 30 actuating a switch 7 for cathode heating and for the Wehnelt cylinders, (4) a motor 11 actuating an earthing rod 12 which in its lowest position permits the closure of the primary circuit of the transformer 8, (5) the primary circuit of the transformer 8, (6) the condenser coil 3. These operations are followed by the 'opening of the circuit of the lamp 26. To de-energize the microscope the controller is operated in the reverse sense.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE530032X | 1938-06-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB530032A true GB530032A (en) | 1940-12-03 |
Family
ID=6554335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17443/39A Expired GB530032A (en) | 1938-06-14 | 1939-06-14 | Improvements in control systems for electron microscopes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2253864A (en) |
| BE (1) | BE434855A (en) |
| FR (1) | FR856126A (en) |
| GB (1) | GB530032A (en) |
| NL (1) | NL52144C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2443107A (en) * | 1945-07-30 | 1948-06-08 | Rca Corp | Electron optical system and method |
| US2548791A (en) * | 1945-10-19 | 1951-04-10 | Ralph H Hoglund | Automatic focusing circuit |
| NL67115C (en) * | 1946-01-12 | |||
| US2635208A (en) * | 1948-04-21 | 1953-04-14 | John M Cage | Television circuit |
| US2626988A (en) * | 1948-10-07 | 1953-01-27 | Bendix Aviat Corp | Power supply arrangement for television receivers |
| US2543719A (en) * | 1949-07-29 | 1951-02-27 | Rca Corp | Deflection circuit |
-
0
- BE BE434855D patent/BE434855A/xx unknown
- NL NL52144D patent/NL52144C/xx active
-
1939
- 1939-06-13 FR FR856126D patent/FR856126A/en not_active Expired
- 1939-06-14 US US279036A patent/US2253864A/en not_active Expired - Lifetime
- 1939-06-14 GB GB17443/39A patent/GB530032A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE434855A (en) | |
| NL52144C (en) | |
| FR856126A (en) | 1940-05-30 |
| US2253864A (en) | 1941-08-26 |
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