CH488353A -
Number switches for telecommunications equipment, in particular telephone equipment
- Google Patents
Number switches for telecommunications equipment, in particular telephone equipment
Info
Publication number
CH488353A
CH488353ACH378869ACH378869ACH488353ACH 488353 ACH488353 ACH 488353ACH 378869 ACH378869 ACH 378869ACH 378869 ACH378869 ACH 378869ACH 488353 ACH488353 ACH 488353A
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Publication date
Application filed by Int Standard Electric CorpfiledCriticalInt Standard Electric Corp
Publication of CH488353ApublicationCriticalpatent/CH488353A/en
H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/26—Devices for calling a subscriber
H04M1/30—Devices which can set up and transmit only one digit at a time
H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04M—TELEPHONIC COMMUNICATION
H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/02—Constructional features of telephone sets
H04M1/23—Construction or mounting of dials or of equivalent devices; Means for facilitating the use thereof
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Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
Electromechanical Clocks
(AREA)
CH378869A1968-03-141969-03-13
Number switches for telecommunications equipment, in particular telephone equipment
CH488353A
(en)