CA502075A - Switch and signal control systems - Google Patents

Switch and signal control systems

Info

Publication number
CA502075A
CA502075A CA502075A CA502075DA CA502075A CA 502075 A CA502075 A CA 502075A CA 502075 A CA502075 A CA 502075A CA 502075D A CA502075D A CA 502075DA CA 502075 A CA502075 A CA 502075A
Authority
CA
Canada
Prior art keywords
switch
control systems
signal control
signal
systems
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
CA502075A
Other languages
French (fr)
Inventor
D. Preston Neil
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.)
SPX Corp
Original Assignee
Neil D Preston
General Railway Signal Co
Publication date
Application granted granted Critical
Publication of CA502075A publication Critical patent/CA502075A/en
Expired legal-status Critical Current

Links

CA502075A Switch and signal control systems Expired CA502075A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA502075T

Publications (1)

Publication Number Publication Date
CA502075A true CA502075A (en) 1954-05-04

Family

ID=35647974

Family Applications (1)

Application Number Title Priority Date Filing Date
CA502075A Expired CA502075A (en) Switch and signal control systems

Country Status (1)

Country Link
CA (1) CA502075A (en)

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