CA490688A - Electric signalling systems - Google Patents

Electric signalling systems

Info

Publication number
CA490688A
CA490688A CA490688A CA490688DA CA490688A CA 490688 A CA490688 A CA 490688A CA 490688 A CA490688 A CA 490688A CA 490688D A CA490688D A CA 490688DA CA 490688 A CA490688 A CA 490688A
Authority
CA
Canada
Prior art keywords
signalling systems
electric signalling
electric
systems
signalling
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
CA490688A
Other languages
French (fr)
Inventor
Spicer Crutch Leslie
Henry Mole John
Charles Newman William
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.)
Siemens Brothers and Co Ltd
Original Assignee
Siemens Brothers and Co Ltd
Publication date
Application granted granted Critical
Publication of CA490688A publication Critical patent/CA490688A/en
Expired legal-status Critical Current

Links

CA490688A Electric signalling systems Expired CA490688A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA490688T

Publications (1)

Publication Number Publication Date
CA490688A true CA490688A (en) 1953-02-17

Family

ID=35630425

Family Applications (1)

Application Number Title Priority Date Filing Date
CA490688A Expired CA490688A (en) Electric signalling systems

Country Status (1)

Country Link
CA (1) CA490688A (en)

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