GB604572A - Improvements relating to rolling shutters - Google Patents

Improvements relating to rolling shutters

Info

Publication number
GB604572A
GB604572A GB3205445A GB3205445A GB604572A GB 604572 A GB604572 A GB 604572A GB 3205445 A GB3205445 A GB 3205445A GB 3205445 A GB3205445 A GB 3205445A GB 604572 A GB604572 A GB 604572A
Authority
GB
United Kingdom
Prior art keywords
shutter
wheel
spring
pawl
barrel
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
GB3205445A
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.)
Mather and Platt Ltd
Original Assignee
Mather and Platt 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 Mather and Platt Ltd filed Critical Mather and Platt Ltd
Priority to GB3205445A priority Critical patent/GB604572A/en
Publication of GB604572A publication Critical patent/GB604572A/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
    • E06B9/56—Operating, guiding or securing devices or arrangements for roll-type closures; Spring drums; Tape drums; Counterweighting arrangements therefor
    • E06B9/68—Operating devices or mechanisms, e.g. with electric drive

Landscapes

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

Abstract

604,572. Fire-preventing shutters. MATHER & PLATT, Ltd., and McCLENAN, F. Nov. 27, 1945, No. 32054. [Class 47 (ii)] In a spring - counter balanced rolling shutter adapted to close automatically when a link fuses in case of fire, the spring is first rendered inoperative when the link fuses so that the shutter begins to fall under its own weight, and its action is then reinstated so as to be operative during the remainder of the fall of the shutter, and subsequently if it is desired to raise the shutter. The shaft 3 is rotatable in bearings 5, 7 and is interconnected by the balancing spring 10 with the barrel 1 which rotates on the shaft on bearings 4. A ratchet wheel 8 secured to the shaft is normally locked by a catch lever 15 connected to the fusible link 20<SP>1</SP>. The wheel 8 carries a pawl 20 which is urged by a spring 21 to engage a ratchet wheel 19 secured to the barrel but normally is held away from it by a pivoted catch 22. When the link 20<SP>1</SP> melts, the lever 15 falls and the shaft 3 is rotated by a spring 27. This rotation forces the pawl 20 from the catch 22 and the pawl engages the wheel 19 so that the barrel and shaft rotate together and the shutter 2 begins to descend without hindrance from the spring 10. After a small angular rotation of the wheel 8, the pawl 20 is disengaged from the wheel 19 by means of a stop 23<SP>1</SP> and the wheel 8 is locked 'against further movement by the pawl 20 wedging between stops 23<SP>1</SP> and 25. The barrel can now rotate alone and the shutter continues to descend under its acquired momentum and against the action of the spring 10. If it is desired to raise the shutter, the spring 10 will exercise its normal counterbalancing function. If the link 201 should melt while the shutter is lowered, the wheel 8 is prevented from rotating by a pawl 31 fitted with a feeler arm 33 which holds the pawl away from the wheel, by engaging with the shutter 2 when the latter is rolled on the barrel. To reset the mechanism after an automatic release, the shutter is rolled up and the ratchet 8 forced back to its initial position shown in Fig. 2.
GB3205445A 1945-11-27 1945-11-27 Improvements relating to rolling shutters Expired GB604572A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3205445A GB604572A (en) 1945-11-27 1945-11-27 Improvements relating to rolling shutters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3205445A GB604572A (en) 1945-11-27 1945-11-27 Improvements relating to rolling shutters

Publications (1)

Publication Number Publication Date
GB604572A true GB604572A (en) 1948-07-06

Family

ID=10332453

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3205445A Expired GB604572A (en) 1945-11-27 1945-11-27 Improvements relating to rolling shutters

Country Status (1)

Country Link
GB (1) GB604572A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1260748B (en) * 1953-12-11 1968-02-08 Carl Kauffmann Arrangement of a roller shutter, which can be closed automatically in the event of fire, as a cover for a means of transport set up for continuous movement, e.g. B. an escalator
US4147197A (en) * 1977-06-20 1979-04-03 Overhead Door Corporation Fire door and operator therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1260748B (en) * 1953-12-11 1968-02-08 Carl Kauffmann Arrangement of a roller shutter, which can be closed automatically in the event of fire, as a cover for a means of transport set up for continuous movement, e.g. B. an escalator
US4147197A (en) * 1977-06-20 1979-04-03 Overhead Door Corporation Fire door and operator therefor

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