CA997793A - Revolving door operating and speed control mechanism - Google Patents

Revolving door operating and speed control mechanism

Info

Publication number
CA997793A
CA997793A CA218,356A CA218356A CA997793A CA 997793 A CA997793 A CA 997793A CA 218356 A CA218356 A CA 218356A CA 997793 A CA997793 A CA 997793A
Authority
CA
Canada
Prior art keywords
control mechanism
speed control
revolving door
door operating
operating
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
CA218,356A
Inventor
Amuel E. Sheckells
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.)
International Steel Co
Original Assignee
International Steel Co
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
Priority claimed from CA158,249A external-priority patent/CA973211A/en
Application filed by International Steel Co filed Critical International Steel Co
Priority to CA218,356A priority Critical patent/CA997793A/en
Application granted granted Critical
Publication of CA997793A publication Critical patent/CA997793A/en
Expired legal-status Critical Current

Links

CA218,356A 1971-12-21 1975-01-21 Revolving door operating and speed control mechanism Expired CA997793A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA218,356A CA997793A (en) 1971-12-21 1975-01-21 Revolving door operating and speed control mechanism

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US21038571A 1971-12-21 1971-12-21
CA158,249A CA973211A (en) 1971-12-21 1972-12-06 Revolving door operating and speed control mechanism
CA218,356A CA997793A (en) 1971-12-21 1975-01-21 Revolving door operating and speed control mechanism

Publications (1)

Publication Number Publication Date
CA997793A true CA997793A (en) 1976-09-28

Family

ID=27162453

Family Applications (1)

Application Number Title Priority Date Filing Date
CA218,356A Expired CA997793A (en) 1971-12-21 1975-01-21 Revolving door operating and speed control mechanism

Country Status (1)

Country Link
CA (1) CA997793A (en)

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