AU266550B2 - Improvements relating to telephone exchange system ring-tripping arrangements and to like direct current responsive arrangements adapted to discriminate against alternating current - Google Patents

Improvements relating to telephone exchange system ring-tripping arrangements and to like direct current responsive arrangements adapted to discriminate against alternating current

Info

Publication number
AU266550B2
AU266550B2 AU21513/62A AU2151362A AU266550B2 AU 266550 B2 AU266550 B2 AU 266550B2 AU 21513/62 A AU21513/62 A AU 21513/62A AU 2151362 A AU2151362 A AU 2151362A AU 266550 B2 AU266550 B2 AU 266550B2
Authority
AU
Australia
Prior art keywords
arrangements
exchange system
telephone exchange
improvements relating
tripping
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
AU21513/62A
Other versions
AU2151362A (en
Inventor
Brownlie Clark John
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries Ltd
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.)
Filing date
Publication date
Application filed by Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Application granted granted Critical
Publication of AU2151362A publication Critical patent/AU2151362A/en
Publication of AU266550B2 publication Critical patent/AU266550B2/en
Expired legal-status Critical Current

Links

AU21513/62A 1961-09-04 1962-08-28 Improvements relating to telephone exchange system ring-tripping arrangements and to like direct current responsive arrangements adapted to discriminate against alternating current Expired AU266550B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB31741/61 1961-09-04

Publications (2)

Publication Number Publication Date
AU2151362A AU2151362A (en) 1964-03-05
AU266550B2 true AU266550B2 (en) 1964-03-05

Family

ID=

Similar Documents

Publication Publication Date Title
AU266550B2 (en) Improvements relating to telephone exchange system ring-tripping arrangements and to like direct current responsive arrangements adapted to discriminate against alternating current
AU2151362A (en) Improvements relating to telephone exchange system ring-tripping arrangements and to like direct current responsive arrangements adapted to discriminate against alternating current
AU268510B2 (en) Improvements in or relating to condensing systems
AU246150B2 (en) Improvements in or relating to electrical indicating systems
AU247105B2 (en) Improvements in or relating to rectifier circuit arrangements
AU263938B2 (en) Improvements in or relating to electrical signalling systems
AU254853B2 (en) Improvements in or relating to telegraph systems
MY6500134A (en) Improvements in or relating to automatic telephone system
CA629569A (en) Alternating current responsive devices
AU2198862A (en) Improvements in or relating to condensing systems
AU263088B2 (en) Improvements in or relating to intruder detection apparatus
AU258873B2 (en) Improvements in or relating to alarm systems
AU266136B2 (en) m-Entitled IMPROVEMENTS IN OR RELATING TO ELEVATOR SYSTEMS
AU744361A (en) Improvements in or relating to electrical indicating systems
AU270195B2 (en) Improvements in or relating to organopoly siloxane - polycarbonate copolymer
AU1074461A (en) Improvements in or relating to rectifier circuit arrangements
AU1493662A (en) Improvements in or relating to electrical signalling systems
AU702761A (en) Improvements in or relating to telegraph systems
AU271628B2 (en) Improvements in or relating to resilient couplings
CA613683A (en) Alternating current system
AU265573B2 (en) Improvements in or relating to rectifier arrangements
AU2113762A (en) Improvements in or relating to intruder detection apparatus
CA622636A (en) Electrolytic protection system
AU256576B2 (en) Improvements in or relating to limiter circuits
CA620962A (en) Griseoviridin and viridogrisein separation