GB609673A - Improvements relating to spring controlled mechanism - Google Patents

Improvements relating to spring controlled mechanism

Info

Publication number
GB609673A
GB609673A GB863146A GB863146A GB609673A GB 609673 A GB609673 A GB 609673A GB 863146 A GB863146 A GB 863146A GB 863146 A GB863146 A GB 863146A GB 609673 A GB609673 A GB 609673A
Authority
GB
United Kingdom
Prior art keywords
spring
shaft
pulley
drum
hub
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
GB863146A
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.)
NORMAN GREENWOOD KERSHAW
Siemens Mobility Ltd
Original Assignee
NORMAN GREENWOOD KERSHAW
Westinghouse Brake and Signal Co Ltd
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 NORMAN GREENWOOD KERSHAW, Westinghouse Brake and Signal Co Ltd filed Critical NORMAN GREENWOOD KERSHAW
Priority to GB863146A priority Critical patent/GB609673A/en
Publication of GB609673A publication Critical patent/GB609673A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/02—Shutters, movable grilles, or other safety closing devices, e.g. against burglary
    • E06B9/08—Roll-type closures
    • E06B9/11—Roller shutters
    • E06B9/17—Parts or details of roller shutters, e.g. suspension devices, shutter boxes, wicket doors, ventilation openings
    • E06B9/171—Rollers therefor; Fastening roller shutters to rollers
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/66—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor with a roller situated at the bottom

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)

Abstract

609,673. Springs. WESTINGHOUSE BRAKE & SIGNAL CO., Ltd., KERSHAW, N. G., and MASON, R. March 20, 1946, No. 8631. [Class 108 (iii)] [Also in Group X] A spring-controlled mechanism comprises a body to be moved in a predetermined path against variable resistance coupled to both ends of a spring so that as the body moves both ends of the spring automatically move in the same direction and relatively to each other. As shown, the shutter 1 is wound on the drum 2 which has a hollow hub 3 rotatably mounted on a coaxial shaft 4 supported on fixed bearings 5, and which is coupled to the shaft 4 by a tension spring 6 surrounding the shaft and secured at one end to the hub at 7 and at the other to the shaft. The shutter is guided in grooves 8 and is connected at the top end to a flexible connection 9 which passes over the pulley 10 and is secured to the pulley 11 rigidly mounted on the shaft 4. The shaft is first rotated relative to the hub 3 and locked by the pin 12 which is removed when the connections 9 are in place. As the blind is unwound, the spring exerts a large upward pull via the pulley 11 of constant small diameter, and a smaller downward pull via the drum of initially large diameter, but this downward pull increases as the drum diameter decreases, therefore the upward movement of the blind is assisted to a decreasing extent by the spring. The pulleys 11 may be replaced by coned or other shaped pulleys to provide any desired variation in the effect of the spring. The invention is applicable to horizontal shutters &c.
GB863146A 1946-03-20 1946-03-20 Improvements relating to spring controlled mechanism Expired GB609673A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB863146A GB609673A (en) 1946-03-20 1946-03-20 Improvements relating to spring controlled mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB863146A GB609673A (en) 1946-03-20 1946-03-20 Improvements relating to spring controlled mechanism

Publications (1)

Publication Number Publication Date
GB609673A true GB609673A (en) 1948-10-05

Family

ID=9856184

Family Applications (1)

Application Number Title Priority Date Filing Date
GB863146A Expired GB609673A (en) 1946-03-20 1946-03-20 Improvements relating to spring controlled mechanism

Country Status (1)

Country Link
GB (1) GB609673A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2647743A (en) * 1949-06-29 1953-08-04 Eastern Metals Res Co Inc Spring device
NL1021903C2 (en) * 2002-11-12 2004-05-13 Boer Stalinrichtingen Screen for e.g. animal stall or greenhouse, includes resilient absorbing device for tension present in cover

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2647743A (en) * 1949-06-29 1953-08-04 Eastern Metals Res Co Inc Spring device
NL1021903C2 (en) * 2002-11-12 2004-05-13 Boer Stalinrichtingen Screen for e.g. animal stall or greenhouse, includes resilient absorbing device for tension present in cover

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