CA156469A - Appareil a fermer les portes de mines - Google Patents

Appareil a fermer les portes de mines

Info

Publication number
CA156469A
CA156469A CA000156469A CA156469DA CA156469A CA 156469 A CA156469 A CA 156469A CA 000156469 A CA000156469 A CA 000156469A CA 156469D A CA156469D A CA 156469DA CA 156469 A CA156469 A CA 156469A
Authority
CA
Canada
Prior art keywords
door closer
mine door
mine
closer
door
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
CA000156469A
Other languages
English (en)
Inventor
Thomas Ramsay
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of CA156469A publication Critical patent/CA156469A/fr
Expired legal-status Critical Current

Links

CA000156469A 1914-02-05 1914-02-05 Appareil a fermer les portes de mines Expired CA156469A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA156469T 1914-02-05

Publications (1)

Publication Number Publication Date
CA156469A true CA156469A (fr) 1914-06-23

Family

ID=45276176

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000156469A Expired CA156469A (fr) 1914-02-05 1914-02-05 Appareil a fermer les portes de mines

Country Status (1)

Country Link
CA (1) CA156469A (fr)

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