CA387790A - Shaft drill safety device - Google Patents

Shaft drill safety device

Info

Publication number
CA387790A
CA387790A CA387790A CA387790DA CA387790A CA 387790 A CA387790 A CA 387790A CA 387790 A CA387790 A CA 387790A CA 387790D A CA387790D A CA 387790DA CA 387790 A CA387790 A CA 387790A
Authority
CA
Canada
Prior art keywords
safety device
shaft drill
drill safety
shaft
safety
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
CA387790A
Other languages
French (fr)
Inventor
Branner Newsom John
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.)
IDAHO MARYLAND MINES Corp
Original Assignee
IDAHO MARYLAND MINES Corp
Publication date
Application granted granted Critical
Publication of CA387790A publication Critical patent/CA387790A/en
Expired legal-status Critical Current

Links

CA387790A Shaft drill safety device Expired CA387790A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA387790T

Publications (1)

Publication Number Publication Date
CA387790A true CA387790A (en) 1940-04-02

Family

ID=35392987

Family Applications (1)

Application Number Title Priority Date Filing Date
CA387790A Expired CA387790A (en) Shaft drill safety device

Country Status (1)

Country Link
CA (1) CA387790A (en)

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