Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04M—TELEPHONIC COMMUNICATION
  • H04M9/00—Arrangements for interconnection not involving centralised switching
  • H04M9/001—Two-way communication systems between a limited number of parties
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H51/00—Electromagnetic relays
  • H01H51/02—Non-polarised relays
  • H01H51/20—Non-polarised relays with two or more independent armatures
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/10—Operating or release mechanisms
  • H01H71/12—Automatic release mechanisms with or without manual release
  • H01H71/24—Electromagnetic mechanisms
  • H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/10—Operating or release mechanisms
  • H01H71/12—Automatic release mechanisms with or without manual release
  • H01H71/24—Electromagnetic mechanisms
  • H01H71/2472—Electromagnetic mechanisms with rotatable armatures
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
  • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
  • H01J19/28—Non-electron-emitting electrodes; Screens
  • H01J19/40—Screens for shielding
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
  • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
  • H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
  • H01J5/08—Vessels; Containers; Shields associated therewith; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03B—GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS
  • H03B19/00—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source
  • H03B19/06—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source by means of discharge device or semiconductor device with more than two electrodes
  • H03B19/08—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source by means of discharge device or semiconductor device with more than two electrodes by means of a discharge device
  • H03B19/10—Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source by means of discharge device or semiconductor device with more than two electrodes by means of a discharge device using multiplication only
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
  • H03J3/00—Continuous tuning
• • H—ELECTRICITY
  • H03—ELECTRONIC CIRCUITRY
  • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
  • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
  • H03J7/02—Automatic frequency control
  • H03J7/04—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant
  • H03J7/042—Automatic frequency control where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant with reactance tube

Landscapes

• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Engineering & Computer Science (AREA)
• Signal Processing (AREA)
• Transmitters (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=25749771

Family Applications (5)

Family Applications Before (3)

Family Applications After (1)

Country Status (4)

Families Citing this family (5)

• 0
  • BE BE443603D patent/BE443603A/xx unknown
  • BE BE444964D patent/BE444964A/xx unknown
  • BE BE442138D patent/BE442138A/xx unknown
  • BE BE444958D patent/BE444958A/xx unknown
  • BE BE444963D patent/BE444963A/xx unknown
• 1941
  • 1941-06-09 CH CH226801D patent/CH226801A/de unknown
  • 1941-07-05 US US401099A patent/US2340539A/en not_active Expired - Lifetime
  • 1941-11-14 CH CH227017D patent/CH227017A/de unknown
• 1942
  • 1942-01-16 CH CH224804D patent/CH224804A/de unknown
  • 1942-03-18 CH CH226126D patent/CH226126A/de unknown
  • 1942-03-20 FR FR880363D patent/FR880363A/fr not_active Expired
  • 1942-04-15 FR FR881219D patent/FR881219A/fr not_active Expired

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