GB453969A - Improvements relating to spring balanced loft ladders - Google Patents

Improvements relating to spring balanced loft ladders

Info

Publication number
GB453969A
GB453969A GB1827235A GB1827235A GB453969A GB 453969 A GB453969 A GB 453969A GB 1827235 A GB1827235 A GB 1827235A GB 1827235 A GB1827235 A GB 1827235A GB 453969 A GB453969 A GB 453969A
Authority
GB
United Kingdom
Prior art keywords
spring
chain
attached
ladder
loft
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
GB1827235A
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.)
LOFT LADDERS Ltd
PERCY HAROLD GORHAM
Original Assignee
LOFT LADDERS Ltd
PERCY HAROLD GORHAM
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 LOFT LADDERS Ltd, PERCY HAROLD GORHAM filed Critical LOFT LADDERS Ltd
Priority to GB1827235A priority Critical patent/GB453969A/en
Publication of GB453969A publication Critical patent/GB453969A/en
Expired legal-status Critical Current

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04FFINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F11/00Stairways, ramps, or like structures; Balustrades; Handrails
    • E04F11/02Stairways; Layouts thereof
    • E04F11/04Movable stairways, e.g. of loft ladders which may or may not be concealable or extensible

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Abstract

453,969. Loft - ladders. LOFT LADDERS, Ltd., Broadway Works, Bromley, and GORHAM, P. H., 25, Degema Road, Chislehurst, both in Kent. June 26, 1935, No. 18272. Addition to 392,940. [Class 20 (ii)] A loft-ladder according to the parent Specification is now provided with reduction gearing between the counterbalancing spring and the chain or the like connected to the ladder so that a comparatively short spring may be employed. In the construction shown, the chain 4, connected at one end to the plunger 3 arranged behind the spring 1, is passed around a pulley 5 and attached to the block 6 of another pulley 7. The cord 8 which is connected to the ladder is entrained round the pulley 7 and anchored to a fixed point 9. This arrangement provides a direct 2 to 1 reduction gear ; other ratios may be obtained by increasing the number of pulleys. In a modification the chain 4 and cord 8 are attached to and entrained around different sized pulleys attached to a common shaft. The spring and reduction gear may alternatively be carried by the ladder the appropriate chain or cord being attached to some stationary point. Specification 453,968 also is referred to.
GB1827235A 1935-06-26 1935-06-26 Improvements relating to spring balanced loft ladders Expired GB453969A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1827235A GB453969A (en) 1935-06-26 1935-06-26 Improvements relating to spring balanced loft ladders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1827235A GB453969A (en) 1935-06-26 1935-06-26 Improvements relating to spring balanced loft ladders

Publications (1)

Publication Number Publication Date
GB453969A true GB453969A (en) 1936-09-22

Family

ID=10109597

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1827235A Expired GB453969A (en) 1935-06-26 1935-06-26 Improvements relating to spring balanced loft ladders

Country Status (1)

Country Link
GB (1) GB453969A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1041674B (en) * 1954-07-10 1958-10-23 Aloys Hesselkamp Fa Retractable attic stairs

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1041674B (en) * 1954-07-10 1958-10-23 Aloys Hesselkamp Fa Retractable attic stairs

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