ZA742857B - Improvements in or relating to electronics switching circuits - Google Patents

Improvements in or relating to electronics switching circuits

Info

Publication number: ZA742857B
Authority: ZA; South Africa
Prior art keywords: relating; switching circuits; electronics switching; electronics; circuits
Prior art date: 1973-07-03

Application number

ZA00742857A

Other languages

English (en)

Inventor

R Wrigley

Original Assignee

Int Standard Electric Corp

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1973-07-03

Filing date

1974-05-06

Publication date

1975-03-26

1974-05-06 Application filed by Int Standard Electric Corp filed Critical Int Standard Electric Corp

1975-03-26 Publication of ZA742857B publication Critical patent/ZA742857B/xx

Links

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
- H04M1/30—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
- H04M1/312—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 pulses produced by electronic circuits

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Meter Arrangements (AREA)
Electronic Switches (AREA)
Interface Circuits In Exchanges (AREA)

ZA00742857A 1973-07-03 1974-05-06 Improvements in or relating to electronics switching circuits ZA742857B (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
GB3161273A GB1404078A (en)	1973-07-03	1973-07-03	Telephone outpulser circuits

Publications (1)

Publication Number	Publication Date
ZA742857B true ZA742857B (en)	1975-03-26

Family

ID=10325756

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
ZA00742857A ZA742857B (en)	1973-07-03	1974-05-06	Improvements in or relating to electronics switching circuits

Country Status (10)

Country	Link
AR (1)	AR203751A1 (fr)
BE (1)	BE817196R (fr)
BR (1)	BR7405356A (fr)
DE (1)	DE2430740A1 (fr)
ES (1)	ES427877A1 (fr)
FR (1)	FR2236322B2 (fr)
GB (1)	GB1404078A (fr)
HK (1)	HK28877A (fr)
IT (1)	IT1015222B (fr)
ZA (1)	ZA742857B (fr)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3488450A (en) *	1966-12-02	1970-01-06	American Telephone & Telegraph	Sender for transmitting trains of pulses

1973
- 1973-07-03 GB GB3161273A patent/GB1404078A/en not_active Expired
1974
- 1974-05-06 ZA ZA00742857A patent/ZA742857B/xx unknown
- 1974-06-20 IT IT24191/74A patent/IT1015222B/it active
- 1974-06-26 DE DE2430740A patent/DE2430740A1/de active Pending
- 1974-06-28 BR BR5356/74A patent/BR7405356A/pt unknown
- 1974-07-02 FR FR7422934A patent/FR2236322B2/fr not_active Expired
- 1974-07-02 ES ES427877A patent/ES427877A1/es not_active Expired
- 1974-07-03 BE BE2053727A patent/BE817196R/fr not_active IP Right Cessation
- 1974-07-04 AR AR254529A patent/AR203751A1/es active
1977
- 1977-06-09 HK HK288/77A patent/HK28877A/xx unknown

Also Published As

Publication number	Publication date
GB1404078A (en)	1975-08-28
HK28877A (en)	1977-06-17
BR7405356A (pt)	1976-08-31
AU6914474A (en)	1975-11-20
AR203751A1 (es)	1975-10-15
FR2236322B2 (fr)	1978-11-24
IT1015222B (it)	1977-05-10
FR2236322A2 (fr)	1975-01-31
ES427877A1 (es)	1976-11-16
BE817196R (fr)	1975-01-03
DE2430740A1 (de)	1975-01-23

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