CA407163A - Light signal test and focusing means - Google Patents

Light signal test and focusing means

Info

Publication number
CA407163A
CA407163A CA407163A CA407163DA CA407163A CA 407163 A CA407163 A CA 407163A CA 407163 A CA407163 A CA 407163A CA 407163D A CA407163D A CA 407163DA CA 407163 A CA407163 A CA 407163A
Authority
CA
Canada
Prior art keywords
light signal
focusing means
signal test
test
focusing
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
CA407163A
Other languages
French (fr)
Inventor
R. Douglass Myrl
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.)
Hitachi Rail STS USA Inc
Original Assignee
Union Switch and Signal Inc
Publication date
Application granted granted Critical
Publication of CA407163A publication Critical patent/CA407163A/en
Expired legal-status Critical Current

Links

CA407163A Light signal test and focusing means Expired CA407163A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA407163T

Publications (1)

Publication Number Publication Date
CA407163A true CA407163A (en) 1942-09-01

Family

ID=35418463

Family Applications (1)

Application Number Title Priority Date Filing Date
CA407163A Expired CA407163A (en) Light signal test and focusing means

Country Status (1)

Country Link
CA (1) CA407163A (en)

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