Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04M—TELEPHONIC COMMUNICATION
  • H04M19/00—Current supply arrangements for telephone systems
  • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04M—TELEPHONIC COMMUNICATION
  • H04M1/00—Substation equipment, e.g. for use by subscribers
  • H04M1/26—Devices for calling a subscriber
  • H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
  • H04M1/272—Devices whereby a plurality of signals may be stored simultaneously with provision for storing only one subscriber number at a time, e.g. by keyboard or dial
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04M—TELEPHONIC COMMUNICATION
  • H04M1/00—Substation equipment, e.g. for use by subscribers
  • H04M1/26—Devices for calling a subscriber
  • H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
  • H04M1/274—Devices whereby a plurality of signals may be stored simultaneously with provision for storing more than one subscriber number at a time, e.g. using toothed disc

Landscapes

• Engineering & Computer Science (AREA)
• Signal Processing (AREA)
• Pivots And Pivotal Connections (AREA)
• Structure Of Telephone Exchanges (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=4527663

Family Applications (1)

Country Status (5)

Families Citing this family (10)

Family Cites Families (2)

• 0
  • BE BE489569D patent/BE489569A/xx unknown
• 1948
  • 1948-06-14 CH CH272956D patent/CH272956A/en unknown
• 1949
  • 1949-04-16 US US879690A patent/US2522119A/en not_active Expired - Lifetime
  • 1949-06-13 FR FR1013988D patent/FR1013988A/en not_active Expired
  • 1949-06-13 GB GB15645/49A patent/GB671052A/en not_active Expired

Also Published As

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