GB650616A - Improvements in or relating to flexible ladders - Google Patents

Improvements in or relating to flexible ladders

Info

Publication number
GB650616A
GB650616A GB2884847A GB2884847A GB650616A GB 650616 A GB650616 A GB 650616A GB 2884847 A GB2884847 A GB 2884847A GB 2884847 A GB2884847 A GB 2884847A GB 650616 A GB650616 A GB 650616A
Authority
GB
United Kingdom
Prior art keywords
links
ladder
members
rungs
building
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
GB2884847A
Inventor
Stanley David Studd
Wilfred Williams
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.)
ALBERT NOEL HUDSON
Original Assignee
ALBERT NOEL HUDSON
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 ALBERT NOEL HUDSON filed Critical ALBERT NOEL HUDSON
Priority to GB2884847A priority Critical patent/GB650616A/en
Publication of GB650616A publication Critical patent/GB650616A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C9/00—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes
    • E06C9/06—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted
    • E06C9/14—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted with non-rigid longitudinal members, e.g. rope or chain ladders, ladders of the lazy-tongs type

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Abstract

650,616. Flexible ladders. HUDSON, A. N., STUDD, S. D., and WILLIAMS, W. Oct. 29, 1947, Nos. 28848 and 32409. [Class 20(ii)] A flexible ladder, e.g. a fireescape, has side members, formed of alternate main links 10, Fig. 1, and U-section short links 11, alternate links 11 in each side member being all oppositely disposed to the other links 11 so that the ladder is constrained by rule-joint action to fold in zig-zag formation with its main links 10 superposed as shown in Fig. 3. The rungs 14, Fig. 1, which are channel-shaped with folded-over edges, are welded to the links 11 and W-shaped wallengaging members 16 are secured to the links 11 and rungs 14. The uppermost links 10 are connected to a pair of plate-link chains 9 extending across a window sill 20 and secured to anchorage brackets 21 within the building. A curved tube 25, detachably mounted at the window serves as a guide for the ladder when extending it. In a modification shown in Fig. 4, the main links 10 are about half the length of those shown in Figs. 1, 3 and alternate U- shaped links 11 only are connected by rungs 14 and wall-engaging members 16: In the collapsed ladder in this case, all the superposed members 16 are disposed within the stack which, for a given length of ladder, is approximately twice the height and half the depth of the stack shown in Fig. 3. Where a projecting ledge causes the ladder to hang clear of the wall means may be permanently mounted on the wall for securing the ladder. Thus a pair of toggle links 31, 32, Fig. 5, the link 31 being hooked at 33 for engagement with a rung 14, is actuated by a lever 36 which is locked by a pin 38. The lower end of the ladder may be anchored to the ground as shown in Fig. 7 and may be extended as a chair or provided with a harness or cradle. The attachments of the side members within the building may be provided with spring shock-absorbers. According to the first Provisional Specification the ladder may be housed in a casing on the outside of the building and may be raised by cords in the manner of a venetian blind.
GB2884847A 1947-10-29 1947-10-29 Improvements in or relating to flexible ladders Expired GB650616A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2884847A GB650616A (en) 1947-10-29 1947-10-29 Improvements in or relating to flexible ladders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2884847A GB650616A (en) 1947-10-29 1947-10-29 Improvements in or relating to flexible ladders

Publications (1)

Publication Number Publication Date
GB650616A true GB650616A (en) 1951-02-28

Family

ID=10282123

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2884847A Expired GB650616A (en) 1947-10-29 1947-10-29 Improvements in or relating to flexible ladders

Country Status (1)

Country Link
GB (1) GB650616A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123470A (en) * 1982-07-14 1984-02-01 Collafield Limited Fire escape ladder
GB2156888A (en) * 1984-04-02 1985-10-16 Christopher Richard Rumsey Quick descending fire escape
GB2230549A (en) * 1989-04-14 1990-10-24 David Connor Stow-away fire escape ladder
GB2266331A (en) * 1992-04-21 1993-10-27 Sonia Eden Emergency escape apparatus
GB2261905B (en) * 1991-11-26 1995-08-16 George Henry Peter Bowman A ladder
US5605203A (en) * 1995-08-30 1997-02-25 Chang; Mu-Yi Automatic foldable emergency ladder system
WO2007083148A1 (en) * 2006-01-20 2007-07-26 Melville, Margaret-Anne Escape ladder
CN112443269A (en) * 2019-08-27 2021-03-05 友焜建工集团有限公司 Frame ladder convenient to climb for building and capable of being used with outer wall in matched mode

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123470A (en) * 1982-07-14 1984-02-01 Collafield Limited Fire escape ladder
GB2156888A (en) * 1984-04-02 1985-10-16 Christopher Richard Rumsey Quick descending fire escape
GB2230549A (en) * 1989-04-14 1990-10-24 David Connor Stow-away fire escape ladder
GB2261905B (en) * 1991-11-26 1995-08-16 George Henry Peter Bowman A ladder
GB2266331A (en) * 1992-04-21 1993-10-27 Sonia Eden Emergency escape apparatus
US5605203A (en) * 1995-08-30 1997-02-25 Chang; Mu-Yi Automatic foldable emergency ladder system
WO2007083148A1 (en) * 2006-01-20 2007-07-26 Melville, Margaret-Anne Escape ladder
CN112443269A (en) * 2019-08-27 2021-03-05 友焜建工集团有限公司 Frame ladder convenient to climb for building and capable of being used with outer wall in matched mode
CN112443269B (en) * 2019-08-27 2022-07-05 友焜建工集团有限公司 Frame ladder convenient to climb for building and capable of being used with outer wall in matched mode

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