CA221033A - Change speed mechanism for drilling machines - Google Patents

Change speed mechanism for drilling machines

Info

Publication number
CA221033A
CA221033A CA221033A CA221033DA CA221033A CA 221033 A CA221033 A CA 221033A CA 221033 A CA221033 A CA 221033A CA 221033D A CA221033D A CA 221033DA CA 221033 A CA221033 A CA 221033A
Authority
CA
Canada
Prior art keywords
change speed
drilling machines
speed mechanism
drilling
machines
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
CA221033A
Other languages
French (fr)
Inventor
T. Sears Willard
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.)
JOHN BERTRAM AND SONS Co
Original Assignee
JOHN BERTRAM AND SONS Co
Publication date
Application granted granted Critical
Publication of CA221033A publication Critical patent/CA221033A/en
Expired legal-status Critical Current

Links

CA221033A Change speed mechanism for drilling machines Expired CA221033A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA221033T

Publications (1)

Publication Number Publication Date
CA221033A true CA221033A (en) 1922-07-18

Family

ID=35116636

Family Applications (1)

Application Number Title Priority Date Filing Date
CA221033A Expired CA221033A (en) Change speed mechanism for drilling machines

Country Status (1)

Country Link
CA (1) CA221033A (en)

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