CA272856A - Lamp focusing device - Google Patents

Lamp focusing device

Info

Publication number
CA272856A
CA272856A CA272856A CA272856DA CA272856A CA 272856 A CA272856 A CA 272856A CA 272856 A CA272856 A CA 272856A CA 272856D A CA272856D A CA 272856DA CA 272856 A CA272856 A CA 272856A
Authority
CA
Canada
Prior art keywords
focusing device
lamp focusing
lamp
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
CA272856A
Other languages
French (fr)
Inventor
M. Day Salisbury
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 Technologies Inc
Original Assignee
General Railway Signal Co
Publication date
Application granted granted Critical
Publication of CA272856A publication Critical patent/CA272856A/en
Expired legal-status Critical Current

Links

CA272856A Lamp focusing device Expired CA272856A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA272856T

Publications (1)

Publication Number Publication Date
CA272856A true CA272856A (en) 1927-08-02

Family

ID=35202887

Family Applications (1)

Application Number Title Priority Date Filing Date
CA272856A Expired CA272856A (en) Lamp focusing device

Country Status (1)

Country Link
CA (1) CA272856A (en)

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