NL296553A - - Google Patents
Info
- Publication number
- NL296553A NL296553A NL296553DA NL296553A NL 296553 A NL296553 A NL 296553A NL 296553D A NL296553D A NL 296553DA NL 296553 A NL296553 A NL 296553A
- Authority
- NL
- Netherlands
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
- H02P27/08—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters with pulse width modulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/06—Circuits specially adapted for rendering non-conductive gas discharge tubes or equivalent semiconductor devices, e.g. thyratrons, thyristors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/505—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/51—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using discharge tubes only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/505—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/515—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/5152—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with separate extinguishing means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/505—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/515—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/525—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output waveform or frequency
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/505—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/515—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/525—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output waveform or frequency
- H02M7/527—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with automatic control of output waveform or frequency by pulse width modulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
- H02P23/28—Controlling the motor by varying the switching frequency of switches connected to a DC supply and the motor phases
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/42—Arrangements for controlling electric generators for the purpose of obtaining a desired output to obtain desired frequency without varying speed of the generator
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/047—V/F converter, wherein the voltage is controlled proportionally with the frequency
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Control Of Electrical Variables (AREA)
- Generation Of Surge Voltage And Current (AREA)
- Details Of Valves (AREA)
- Rectifiers (AREA)
- Ac-Ac Conversion (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH957762A CH405494A (fr) | 1962-08-13 | 1962-08-13 | Générateur de courant d'amplitude et de polarité variables |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL296553A true NL296553A (da) | 1900-01-01 |
Family
ID=4353443
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL296551D NL296551A (da) | 1962-08-13 | ||
| NL296553D NL296553A (da) | 1962-08-13 | ||
| NL296551A NL150286B (nl) | 1962-08-13 | 1963-08-12 | Stroomgenerator voor het opwekken van een stroom met variabele grootte en polariteit. |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL296551D NL296551A (da) | 1962-08-13 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL296551A NL150286B (nl) | 1962-08-13 | 1963-08-12 | Stroomgenerator voor het opwekken van een stroom met variabele grootte en polariteit. |
Country Status (11)
| Country | Link |
|---|---|
| US (2) | US3360709A (da) |
| JP (1) | JPS42024447B1 (da) |
| AT (2) | AT241610B (da) |
| BE (2) | BE636058A (da) |
| CH (2) | CH403963A (da) |
| DE (1) | DE1413481A1 (da) |
| ES (2) | ES291112A1 (da) |
| FR (2) | FR1365784A (da) |
| GB (2) | GB992828A (da) |
| NL (3) | NL150286B (da) |
| NO (1) | NO122536B (da) |
Families Citing this family (51)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3379955A (en) * | 1964-11-17 | 1968-04-23 | Lockheed Aircraft Corp | Apparatus for protecting the switching elements of static inverters from transient voltages |
| US3384804A (en) * | 1965-05-20 | 1968-05-21 | Gen Motors Corp | Controlled rectifier inverter having shutoff power supplies |
| US3408551A (en) * | 1965-07-23 | 1968-10-29 | North Electric Co | Current spike suppressor for inverter |
| US3419782A (en) * | 1965-09-20 | 1968-12-31 | Gen Motors Corp | Direct current commutation system for brushless electrical motors |
| US3395328A (en) * | 1965-10-11 | 1968-07-30 | Gen Motors Corp | Direct current commutation system for brushless electrical motors |
| US3423665A (en) * | 1965-10-23 | 1969-01-21 | Lambda Electronics Corp | Electronic power supplies with inverters and regulators |
| US3406325A (en) * | 1966-01-13 | 1968-10-15 | Westinghouse Electric Corp | Forced commutating inverter |
| US3406328A (en) * | 1966-04-28 | 1968-10-15 | Borg Warner | Static inverter carrier system |
| US3434031A (en) * | 1966-09-19 | 1969-03-18 | Bell Telephone Labor Inc | Regulated polyphase rectifying circuits |
| US3465234A (en) * | 1966-10-17 | 1969-09-02 | Allis Chalmers Mfg Co | Ac-dc converter responsive to a single signal in the ac system |
| GB1151112A (en) * | 1967-01-24 | 1969-05-07 | Westinghouse Brake & Signal | Improvements to Voltage Converter Circuits. |
| GB1174118A (en) * | 1967-01-24 | 1969-12-10 | Westinghouse Brake & Signal | Improvements in Circuits Employing Artificial Commutation of a Controllable Rectifier Device |
| US3461373A (en) * | 1967-03-20 | 1969-08-12 | Reliance Electric & Eng Co | Pulse width modulated inverter |
| US3600658A (en) * | 1967-05-15 | 1971-08-17 | Tokyo Shibaura Electric Co | Brushless motor including forced commutation responsive to rotor movement |
| DE1638608C3 (de) * | 1967-09-22 | 1973-12-06 | Siemens Ag, 1000 Berlin U. 8000 Muenchen | Verfahren zum Betrieb eines Strom nchters |
| FR96291E (fr) * | 1967-11-20 | 1972-06-16 | Telemecanique Electrique | Convertisseur a éléments semi-conducteurs commandés fournissant des impulsions a partir d'une source de tension continue. |
| US3566150A (en) * | 1968-03-18 | 1971-02-23 | Lepaute Cie Gle Elec Ind | Impulse generator circuit for the control of rectifiers |
| US3538419A (en) * | 1968-03-25 | 1970-11-03 | Tokyo Shibaura Electric Co | Inverter device |
| YU33745B (en) * | 1969-02-07 | 1978-02-28 | Mitsubishi Electric Corp | Dc power regulation system |
| CH512854A (fr) * | 1969-06-09 | 1971-09-15 | Battelle Memorial Institute | Procédé de commande d'un onduleur polyphasé et appareil pour la mise en oeuvre de ce procédé |
| US3585485A (en) * | 1969-06-20 | 1971-06-15 | Westinghouse Electric Corp | Novel integral firing angle control for converters |
| SE334661B (da) * | 1969-09-01 | 1971-05-03 | Asea Ab | |
| US3621366A (en) * | 1969-11-13 | 1971-11-16 | Marathon Electric Research Of | Dc side commutated chopper and inverter |
| US3611106A (en) * | 1970-03-05 | 1971-10-05 | Gen Motors Corp | Fast rise two-transistor controlled rectifier trigger circuitry with control circuit isolation |
| US3599077A (en) * | 1970-06-18 | 1971-08-10 | Us Army | High-efficiency, controllable dc to ac converter |
| US3634728A (en) * | 1970-07-13 | 1972-01-11 | Jeumont Schneider | Current chopper for dc machines connected to the terminals of a source having an inductive impedance |
| US3652874A (en) * | 1970-07-30 | 1972-03-28 | Donald F Partridge | Circuit for controlling the conduction of a switching device |
| US3824442A (en) * | 1971-07-23 | 1974-07-16 | Westinghouse Brake & Signal | Inverter circuits |
| US3842338A (en) * | 1971-12-27 | 1974-10-15 | Gen Electric | Extended output power control of inverter |
| US3845374A (en) * | 1972-08-18 | 1974-10-29 | B & C Ind Inc | Circuitry for converting ac power to regulated dc power |
| US3866099A (en) * | 1973-08-01 | 1975-02-11 | Gen Motors Corp | Motor power supply system |
| JPS5513237B2 (da) * | 1973-12-07 | 1980-04-07 | ||
| US3916287A (en) * | 1974-03-25 | 1975-10-28 | Bbc Brown Boveri & Cie | Overload protection for a DC to AC conversion apparatus including an N-phase inverter |
| NL7502759A (nl) * | 1974-05-20 | 1975-11-24 | Siemens Ag | Gelijkstroomvormer. |
| US3947748A (en) * | 1975-02-18 | 1976-03-30 | Eaton Corporation | Fault commutation system for static inverters |
| FR2301959A1 (fr) * | 1975-02-18 | 1976-09-17 | Silec Semi Conducteurs | Procede et dispositif de commande maitre-esclave de la puissance d'un pont de thyristors en polyphase |
| US4032831A (en) * | 1975-11-24 | 1977-06-28 | Tokyo Shibaura Denki Kabushiki Kaisha | Inverter apparatus |
| US4067057A (en) * | 1976-06-25 | 1978-01-03 | Pacific Electronic Enterprises Inc. | DC to AC switching converter |
| HU179165B (en) * | 1976-12-06 | 1982-08-28 | Epitoegepgyarto Vallalat | Method and circuit array of controlling current convrters,preferably for continuous speed-control of a.c. motors |
| US4139885A (en) * | 1977-06-20 | 1979-02-13 | Borg-Warner Corporation | Fault protection circuit |
| DE2743411C3 (de) * | 1977-09-27 | 1981-06-11 | Siemens AG, 1000 Berlin und 8000 München | Steuerschaltung zum schrittweisen Betreiben eines kollektorlosen Gleichstrommotors |
| US4310866A (en) * | 1979-09-28 | 1982-01-12 | Borg-Warner Corporation | Shootthrough fault protection system for bipolar transistors in a voltage source transistor inverter |
| US4331994A (en) * | 1979-09-28 | 1982-05-25 | Borg-Warner Corporation | Shootthrough fault protection system for a voltage source transistor inverter |
| US4376296A (en) * | 1981-03-02 | 1983-03-08 | Canadian Patents & Dev. Ltd. | DC-Side commutated inverter |
| US4511835A (en) * | 1982-12-23 | 1985-04-16 | Borg-Warner Corporation | Voltage-controlled, inverter-motor system |
| DE3565619D1 (en) * | 1985-02-08 | 1988-11-17 | Hill Graham Controls | Semi-conductor motor control system |
| US4626979A (en) * | 1985-02-22 | 1986-12-02 | Diego Power | Anticipatory feedback technique for pulse width modulated power supply |
| US4602200A (en) * | 1985-02-26 | 1986-07-22 | General Electric Company | Alternating current motor drive having current filter |
| US4616162A (en) * | 1985-03-18 | 1986-10-07 | General Motors Corporation | Speed selection control for vehicle mounted electric accessory motor |
| FR2895593B1 (fr) * | 2005-12-23 | 2008-03-07 | Valeo Equip Electr Moteur | Machine electrique tournante a phases decouplees |
| US20100090625A1 (en) * | 2008-10-09 | 2010-04-15 | Gm Global Technology Operations, Inc. | Automotive system and power converter assembly with a braking circuit |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL102955C (da) * | 1954-04-07 | |||
| US2820189A (en) * | 1956-08-14 | 1958-01-14 | Asea Ab | Static current converter using voltage commutation |
| GB920106A (en) * | 1960-11-30 | 1963-03-06 | Westinghouse Brake & Signal | Improvements in or relating to inverters |
| GB984567A (en) * | 1961-01-05 | 1965-02-24 | Westinghouse Brake & Signal | Inverter system |
| US3207974A (en) * | 1961-02-23 | 1965-09-21 | Gen Electric | Inverter circuits |
| GB998912A (en) * | 1961-09-21 | 1965-07-21 | Brush Electrical Eng | Speed control of a polyphase electric motor |
| US3127550A (en) * | 1962-08-13 | 1964-03-31 | Texas Instruments Inc | Shunt motor control circuit for speed regulation and current limiting |
| US3219905A (en) * | 1962-09-10 | 1965-11-23 | Brush Electrical Eng | Method of obtaining artificial commutation of an inverter |
| US3310730A (en) * | 1963-06-19 | 1967-03-21 | Gen Motors Corp | Circuit for approximating a desired waveform across a load |
-
0
- BE BE636059D patent/BE636059A/xx unknown
- NL NL296551D patent/NL296551A/xx unknown
- BE BE636058D patent/BE636058A/xx unknown
- NL NL296553D patent/NL296553A/xx unknown
-
1962
- 1962-08-13 CH CH795662A patent/CH403963A/fr unknown
- 1962-08-13 CH CH957762A patent/CH405494A/fr unknown
-
1963
- 1963-07-31 GB GB3215663A patent/GB992828A/en not_active Expired
- 1963-08-08 FR FR944145A patent/FR1365784A/fr not_active Expired
- 1963-08-08 FR FR944146A patent/FR1455768A/fr not_active Expired
- 1963-08-09 US US30106263 patent/US3360709A/en not_active Expired - Lifetime
- 1963-08-09 US US30106363 patent/US3321697A/en not_active Expired - Lifetime
- 1963-08-12 ES ES0291112A patent/ES291112A1/es not_active Expired
- 1963-08-12 GB GB3171963A patent/GB1056874A/en not_active Expired
- 1963-08-12 NL NL296551A patent/NL150286B/xx not_active IP Right Cessation
- 1963-08-12 ES ES0291111A patent/ES291111A1/es not_active Expired
- 1963-08-13 AT AT651263A patent/AT241610B/de active
- 1963-08-13 AT AT651163A patent/AT238828B/de active
- 1963-08-13 NO NO149722A patent/NO122536B/no unknown
- 1963-08-13 DE DE19631413481 patent/DE1413481A1/de active Pending
- 1963-08-13 JP JP4200463A patent/JPS42024447B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR1455768A (fr) | 1966-05-20 |
| NL296551A (da) | 1900-01-01 |
| BE636059A (da) | 1900-01-01 |
| ES291112A1 (es) | 1963-12-01 |
| GB992828A (en) | 1965-05-19 |
| AT238828B (de) | 1965-03-10 |
| US3360709A (en) | 1967-12-26 |
| FR1365784A (fr) | 1964-07-03 |
| CH405494A (fr) | 1966-01-15 |
| NO122536B (da) | 1971-07-12 |
| GB1056874A (en) | 1967-02-01 |
| DE1463107B2 (de) | 1972-07-13 |
| CH403963A (fr) | 1965-12-15 |
| US3321697A (en) | 1967-05-23 |
| BE636058A (da) | 1900-01-01 |
| NL150286B (nl) | 1976-07-15 |
| AT241610B (de) | 1965-08-10 |
| JPS42024447B1 (da) | 1967-11-24 |
| ES291111A1 (es) | 1964-01-16 |
| DE1413481A1 (de) | 1970-01-29 |
| DE1463107A1 (de) | 1969-01-02 |