FR687917A - Improvements to opening and closing systems for doors and gates - Google Patents

Improvements to opening and closing systems for doors and gates

Info

Publication number
FR687917A
FR687917A FR687917DA FR687917A FR 687917 A FR687917 A FR 687917A FR 687917D A FR687917D A FR 687917DA FR 687917 A FR687917 A FR 687917A
Authority
FR
France
Prior art keywords
doors
gates
opening
closing systems
closing
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
Other languages
French (fr)
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.)
CBS Corp
Original Assignee
Westinghouse Electric and Manufacturing 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
Application filed by Westinghouse Electric and Manufacturing Co filed Critical Westinghouse Electric and Manufacturing Co
Application granted granted Critical
Publication of FR687917A publication Critical patent/FR687917A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B13/00—Doors, gates, or other apparatus controlling access to, or exit from, cages or lift well landings
    • B66B13/02—Door or gate operation
    • B66B13/06—Door or gate operation of sliding doors
    • B66B13/08—Door or gate operation of sliding doors guided for horizontal movement
FR687917D 1929-01-18 1930-01-09 Improvements to opening and closing systems for doors and gates Expired FR687917A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US687917XA 1929-01-18 1929-01-18

Publications (1)

Publication Number Publication Date
FR687917A true FR687917A (en) 1930-08-14

Family

ID=22084735

Family Applications (1)

Application Number Title Priority Date Filing Date
FR687917D Expired FR687917A (en) 1929-01-18 1930-01-09 Improvements to opening and closing systems for doors and gates

Country Status (1)

Country Link
FR (1) FR687917A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1143110B (en) * 1952-09-29 1963-01-31 Haegglund & Soener Ab Device for the automatic opening and closing of vehicle doors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1143110B (en) * 1952-09-29 1963-01-31 Haegglund & Soener Ab Device for the automatic opening and closing of vehicle doors

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