Classifications

• • 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
  • H04M1/515—Devices for calling a subscriber by generating or selecting signals other than trains of pulses of similar shape, or signals other than currents of one or more different frequencies, e.g. generation of dc signals of alternating polarity, coded pulses or impedance dialling
• • 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
• • 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
• • 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
  • H04M1/276—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 using magnetic recording, e.g. on tape

Landscapes

• Engineering & Computer Science (AREA)
• Signal Processing (AREA)
• Recording Or Reproducing By Magnetic Means (AREA)
• Dc Digital Transmission (AREA)
• Selective Calling Equipment (AREA)
• Transmitters (AREA)
• Transmission And Conversion Of Sensor Element Output (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=4539780

Family Applications (3)

Family Applications Before (2)

Country Status (4)

Families Citing this family (3)

Family Cites Families (2)

• 0
  • BE BE568785D patent/BE568785A/xx unknown
  • BE BE568867D patent/BE568867A/xx unknown
  • BE BE561586D patent/BE561586A/xx unknown
• 1956
  • 1956-10-18 CH CH347551D patent/CH347551A/de unknown
  • 1956-12-08 CH CH347552D patent/CH347552A/de unknown
• 1957
  • 1957-06-27 CH CH350997D patent/CH350997A/de unknown
  • 1957-06-27 CH CH350996D patent/CH350996A/de unknown
  • 1957-10-07 DE DE1957A0028045 patent/DE1057654B/de active Pending
  • 1957-10-09 GB GB31582/57A patent/GB824469A/en not_active Expired
• 1958
  • 1958-05-28 DE DEA29588A patent/DE1061378B/de active Pending
  • 1958-05-28 DE DEA29587A patent/DE1061377B/de active Pending
  • 1958-06-23 GB GB20080/58A patent/GB850632A/en not_active Expired
  • 1958-06-23 GB GB20079/58A patent/GB850631A/en not_active Expired

Also Published As

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