US1644739A - Emergency ladder - Google Patents

Emergency ladder Download PDF

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Publication number
US1644739A
US1644739A US110934A US11093426A US1644739A US 1644739 A US1644739 A US 1644739A US 110934 A US110934 A US 110934A US 11093426 A US11093426 A US 11093426A US 1644739 A US1644739 A US 1644739A
Authority
US
United States
Prior art keywords
ladder
frame
rung
rungs
frames
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 - Lifetime
Application number
US110934A
Other languages
English (en)
Inventor
Charles C Mccracken
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.)
Individual
Original Assignee
Individual
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 to BE351634D priority Critical patent/BE351634A/fr
Application filed by Individual filed Critical Individual
Priority to US110934A priority patent/US1644739A/en
Application granted granted Critical
Publication of US1644739A publication Critical patent/US1644739A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C1/00—Ladders in general
    • E06C1/52—Ladders in general with non-rigid longitudinal members
    • E06C1/56—Rope or chain ladders

Definitions

  • My invention has for its object to provide a folding emergency ladder that when folded will occupy a small space and when unfolded will constitute a rigid support for the user.
  • the steps or rungs of the ladder are so formed that they will protrude from the wall of the building whereby the feet of the user may be readily and securely placedvon, and his hands may easily grasp the steps or rungs.
  • the ladder is so constructed that it will not be moved outward from the the wall at the point that it is grasped by the hands to a material degree nor will the rungs be tilted when supporting the weight of the user of the ladder, notwithstanding the outward projection or location of the rungs.
  • the invention provides a safe emergency ladder that may be readily utilized in descending along the wall of the building.
  • the invention may be contained in ladders that in the detail of their construction partake of different forms. To illustrate a practical application of the invention I have selected a ladder embodying the invention as an example of suchv structures and shall ydescribe it hereinafter. The ladder selected for purposes of illustration is shown in the drawing.
  • Figure l illustrates a ladder in position for descent.
  • Fig. 2 illustrates a perspective view of the ladder partly unfolded.
  • Fig. 3 is a view of a section through a joint of the ladder.
  • the ladder shown in the drawings is formed of a plurality of connected frame parts and a means is provided for readily connecting the ladder with a sill of the window.
  • the frames are so formed that they will lie one within the other.
  • the larger frame being preferably the top frame when *the ladder is located in the position for use.
  • the ladder may be' unfolded by merely connecting an end frame to a sill and holding the larger frame horizontally and allowing the other frames to drop. This will cause the ladder frames to descend and become supported bv the sill.
  • the hooks l are placed over the sill 2 of the window, the chains 3 being of sufficient length to enable the largest frame 4 of the ladder 5 to be easily held horizontally outside of the window which will permit the other frames of the ladder to drop towards the ground.
  • the chains ready grasp of the rungs.
  • Each frame of the ladder is formed of a pair of side members 7 and a step or rung 8 f to the side members.v
  • the step or rung has two angular bends one at each end which places the body of the rung or step-outside of the plane of the frame of which it forms a part.
  • the step projects slightly and gives a toe hold on the ladder and a Since each rung is locked to the sides of the frame and is located at the top of the frame, the weight of the body when the foot is placed on the rung will cause the lower ends of the sides to press against the wall of the building and prevent tilting of the projecting step or rung,A while if the rung were locate-d at the lower end of the frame, the upper ends of the sides would be tilted outward. Thus the rungs are maintained in their position when stepped on. Also when thel rungs are grasped the downward pull presses the lower ends of the frame againstthe wall and because of the length of the sides as compared 'to vthe projection of the rung or step, the
  • each outer end portion of the steps or rungs is provided with a cylindrical part 12 while the lower end of each side memberof the frames is provided with an opening that fits the cylindrical part 12 and so as to rotate
  • Each end of the step or rung 8 is headed as at ll to rotatably secure the lower ends of the side members of the frames in position.
  • each frame formed of side bars and a step, the step being formed of a bar havllt) ing end portions bent at two right angles to project' the body of the steprroutside of the plane of the side hars; each end of the Vstep having a cylindrical portion and aportion other than cylindrical, the upper ends of the side bars connected' to the step having openings for fitting the portions other than cylindrical for looking the step to the side hars, the lower ends of the Sidehars havingv cylindrical openings itting the cylindrical 10 portions of' the step of the adjoining frame,

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  • Ladders (AREA)
US110934A 1926-05-22 1926-05-22 Emergency ladder Expired - Lifetime US1644739A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BE351634D BE351634A (enrdf_load_stackoverflow) 1926-05-22
US110934A US1644739A (en) 1926-05-22 1926-05-22 Emergency ladder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US110934A US1644739A (en) 1926-05-22 1926-05-22 Emergency ladder

Publications (1)

Publication Number Publication Date
US1644739A true US1644739A (en) 1927-10-11

Family

ID=22335732

Family Applications (1)

Application Number Title Priority Date Filing Date
US110934A Expired - Lifetime US1644739A (en) 1926-05-22 1926-05-22 Emergency ladder

Country Status (2)

Country Link
US (1) US1644739A (enrdf_load_stackoverflow)
BE (1) BE351634A (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2529112A (en) * 1947-07-26 1950-11-07 Marshall F Crouch Window mounted collapsible fire escape
USD242925S (en) 1975-08-25 1977-01-04 Athol John William Salter Folding ladder
EP0057040A3 (en) * 1981-01-26 1983-06-08 Salvador Alimbau Marques Fold-up ladder
US4448283A (en) * 1982-09-13 1984-05-15 Andral Corporation Portable fold-up ladder
US4457391A (en) * 1981-01-26 1984-07-03 Andral Corporation Fold-up ladder
US4493392A (en) * 1981-01-26 1985-01-15 Andral Corp Convertible fold-up ladder
US4926967A (en) * 1988-07-27 1990-05-22 Baker Mervyn R Folding ladders
CN103104189A (zh) * 2011-11-10 2013-05-15 段鳗珊 环中环整钢索救生梯
US20200256125A1 (en) * 2019-02-13 2020-08-13 Ross Hoffmann Rescue ladder attachment
US20200370372A1 (en) * 2019-02-13 2020-11-26 Ross Hoffmann Rescue ladder attachment

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2529112A (en) * 1947-07-26 1950-11-07 Marshall F Crouch Window mounted collapsible fire escape
USD242925S (en) 1975-08-25 1977-01-04 Athol John William Salter Folding ladder
EP0057040A3 (en) * 1981-01-26 1983-06-08 Salvador Alimbau Marques Fold-up ladder
US4457391A (en) * 1981-01-26 1984-07-03 Andral Corporation Fold-up ladder
US4493392A (en) * 1981-01-26 1985-01-15 Andral Corp Convertible fold-up ladder
US4448283A (en) * 1982-09-13 1984-05-15 Andral Corporation Portable fold-up ladder
US4926967A (en) * 1988-07-27 1990-05-22 Baker Mervyn R Folding ladders
CN103104189A (zh) * 2011-11-10 2013-05-15 段鳗珊 环中环整钢索救生梯
US20200256125A1 (en) * 2019-02-13 2020-08-13 Ross Hoffmann Rescue ladder attachment
US20200370372A1 (en) * 2019-02-13 2020-11-26 Ross Hoffmann Rescue ladder attachment

Also Published As

Publication number Publication date
BE351634A (enrdf_load_stackoverflow)

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