GB2036144A - Vertical slat blind - Google Patents

Vertical slat blind Download PDF

Info

Publication number
GB2036144A
GB2036144A GB7928113A GB7928113A GB2036144A GB 2036144 A GB2036144 A GB 2036144A GB 7928113 A GB7928113 A GB 7928113A GB 7928113 A GB7928113 A GB 7928113A GB 2036144 A GB2036144 A GB 2036144A
Authority
GB
United Kingdom
Prior art keywords
spindle
hub
disc
chain wheel
truck
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.)
Granted
Application number
GB7928113A
Other versions
GB2036144B (en
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.)
Louver Lite Ltd
Original Assignee
Louver Lite 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 Louver Lite Ltd filed Critical Louver Lite Ltd
Priority to GB7928113A priority Critical patent/GB2036144B/en
Publication of GB2036144A publication Critical patent/GB2036144A/en
Application granted granted Critical
Publication of GB2036144B publication Critical patent/GB2036144B/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
    • E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
    • E06B9/26—Lamellar or like blinds, e.g. venetian blinds
    • E06B9/36—Lamellar or like blinds, e.g. venetian blinds with vertical lamellae ; Supporting rails therefor
    • E06B9/361—Transmissions located at the end of the supporting rail

Landscapes

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

Abstract

A collapsible vertical slat blind in which the slats are pivoted on trucks slidable on a grooved spindle and rotatable through 90 DEG the drive for the slats being taken through a slipping clutch comprising a hub 2 mounted on the shaft b and a chain wheel unit B coupled to the hub by a spring 3 maintaining a pressure contact between a disc 1a on the wheel unit and a disc 1 on the hub to stop the rotation of the hub if an obstruction prevents rotation of a slat. <IMAGE>

Description

SPECIFICATION Slat blind-clutch for truck spindle This invention relates to improvements in collapsible vertical slat blinds of the kind in which the vertical slats are pivoted on trucks mounted to slide on a grooved spindle in a housing extending across the top of a window frame, doorway or like opening, the housing being formed of channel section to accommodate the trucks each supporting a vertical slat on a hook with manual means for rotating the hooks to open or close the slats, the sides off the channel being grooved longitudinally on each side adjacent the upper edge to accommodate supporting brackets for the housing.
It has been found that when opening or closing the slats they may overlap incorrectly and the mechanism jams with consequent damage and the object of the invention is to provide means for preventing damage if a slat is prevented from rotating.
According to the invention in a blind of the kind referred to each truck having a slat suspended therefrom capable of rotating through 90 from an open to a closed position by rotation of the spindle, the shaft being rotated by a chain wheel through a clutch to a hub keyed on the shaft so that rotation of the shaft is prevented until the stoppage has been rectified.
The invention will be described with reference to the accompanying drawings: Figure 1 is a perspective view of part of the channel section from which the slats are suspended; Figure 2 is an exploded view of the clutch mechanism; Figures 3 and 4 are perspective views of the clutch mechanism chain wheel from the opposite side from that shown in Fig. 2.
Figure 5 is a longitudinal section to a larger scale of the driving end of the housing; A vertical slat collapsible blind is formed of slats A suspended on hooks a depending from trucks and rotated by a grooved spindle b to open and close the slats.
The slats A may be moved from a stacked position at one end of the spindle across a window, doorway or the like opening, by a cord affixed to the outermost truck. Adjacent trucks are connected in known manner by strips one end of each strip being affixed to the truck and the other end turned upwardly to engage a slot in an adjacent truck to bring the upturned end against the side of the slot whereupon the second truck is drawn along the spindle by the first truck and so on until all the trucks are positioned across the width of the window, doorway or other aperture.
The rotation of the spindle b is controlled by a chain wheel unit B over which passes a chain B' movement of which rotates the spindle b to bring the slats A from a position lying parallel side by side through 90 with their surfaces in line to cover the window, doorway or other aperture the width of each slat corresponding substantially to the length of the strip.
The spindle b is mounted in an inverted channel C forming a housing and supported by end caps b' one of which houses the chain wheel B by which the spindle is rotated.
The construction above described is well known and does not form part of the invention.
In carrying out the invention the chain unit B is formed integrally with a disc bto retain the chain B' thereon and with a serated disc 1 a remote from the wheel B the wheel unit being mounted on a hub 2 keyed onto the spindle bwith a coiled spring 3 housed between a flange on the hub 2 and the disc 1.
A circlip 1 a is sprung between the flange 2a and the disc 1 on the wheel unit, the spring 3 exerting a pressure between the disc 1 a and the hub 2. The inner surface of the disc 1 a and the outer surface of disc B being serrated or roughened to increase the resistance to rotation between the wheel unit B and a retaining clip 1. The wheel unit and the hub thus form a slipping clutch so that if any obstruction prevents a hook a from rotating, the chain wheel slips relatively to the hub without causing damage to the truck and the increased resistance to rotation of the chain wheel indicates that a stoppage to the rotation of a truck has occurred and the stoppage is then rectified and rotation of the shaft can be continued. The retaining clip 4 is mounted on the end of the spindle b to retain the slipping clutch on the spindle b.
1. A collapsible vertical slat blind comprising an inverted channel shaped housing for mounting across the top of an opening, a grooved spindle mounted to a plurality of trucks mounted to slide on the spindle, a pivoted hook suspended from each truck and a slat carried by each hook capable of rotating through 90 from an open to a closed position. A manually operated chain wheel for rotating the hooks to open and close the slats, a slipping clutch, a hub keyed on the shaft carrying one member of the clutch a second member of the clutch being mounted on the chain wheel and a spring normally maintaining the hub in engagement as the chain wheel hub allowing the clutch members to slide if an obstruction occurs to stop rotation of the shaft, relatively to the chain wheel until obstruction has been removed.
2. A blind as in claim 1, having a disc formed on the chain wheel to form one clutch member the hub being keyed onto the spindle with the coiled spring housed between a flange on the hub and the disc on the chain
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Slat blind-clutch for truck spindle This invention relates to improvements in collapsible vertical slat blinds of the kind in which the vertical slats are pivoted on trucks mounted to slide on a grooved spindle in a housing extending across the top of a window frame, doorway or like opening, the housing being formed of channel section to accommodate the trucks each supporting a vertical slat on a hook with manual means for rotating the hooks to open or close the slats, the sides off the channel being grooved longitudinally on each side adjacent the upper edge to accommodate supporting brackets for the housing. It has been found that when opening or closing the slats they may overlap incorrectly and the mechanism jams with consequent damage and the object of the invention is to provide means for preventing damage if a slat is prevented from rotating. According to the invention in a blind of the kind referred to each truck having a slat suspended therefrom capable of rotating through 90 from an open to a closed position by rotation of the spindle, the shaft being rotated by a chain wheel through a clutch to a hub keyed on the shaft so that rotation of the shaft is prevented until the stoppage has been rectified. The invention will be described with reference to the accompanying drawings: Figure 1 is a perspective view of part of the channel section from which the slats are suspended; Figure 2 is an exploded view of the clutch mechanism; Figures 3 and 4 are perspective views of the clutch mechanism chain wheel from the opposite side from that shown in Fig. 2. Figure 5 is a longitudinal section to a larger scale of the driving end of the housing; A vertical slat collapsible blind is formed of slats A suspended on hooks a depending from trucks and rotated by a grooved spindle b to open and close the slats. The slats A may be moved from a stacked position at one end of the spindle across a window, doorway or the like opening, by a cord affixed to the outermost truck. Adjacent trucks are connected in known manner by strips one end of each strip being affixed to the truck and the other end turned upwardly to engage a slot in an adjacent truck to bring the upturned end against the side of the slot whereupon the second truck is drawn along the spindle by the first truck and so on until all the trucks are positioned across the width of the window, doorway or other aperture. The rotation of the spindle b is controlled by a chain wheel unit B over which passes a chain B' movement of which rotates the spindle b to bring the slats A from a position lying parallel side by side through 90 with their surfaces in line to cover the window, doorway or other aperture the width of each slat corresponding substantially to the length of the strip. The spindle b is mounted in an inverted channel C forming a housing and supported by end caps b' one of which houses the chain wheel B by which the spindle is rotated. The construction above described is well known and does not form part of the invention. In carrying out the invention the chain unit B is formed integrally with a disc bto retain the chain B' thereon and with a serated disc 1 a remote from the wheel B the wheel unit being mounted on a hub 2 keyed onto the spindle bwith a coiled spring 3 housed between a flange on the hub 2 and the disc 1. A circlip 1 a is sprung between the flange 2a and the disc 1 on the wheel unit, the spring 3 exerting a pressure between the disc 1 a and the hub 2. The inner surface of the disc 1 a and the outer surface of disc B being serrated or roughened to increase the resistance to rotation between the wheel unit B and a retaining clip 1. The wheel unit and the hub thus form a slipping clutch so that if any obstruction prevents a hook a from rotating, the chain wheel slips relatively to the hub without causing damage to the truck and the increased resistance to rotation of the chain wheel indicates that a stoppage to the rotation of a truck has occurred and the stoppage is then rectified and rotation of the shaft can be continued. The retaining clip 4 is mounted on the end of the spindle b to retain the slipping clutch on the spindle b. CLAIMS
1. A collapsible vertical slat blind comprising an inverted channel shaped housing for mounting across the top of an opening, a grooved spindle mounted to a plurality of trucks mounted to slide on the spindle, a pivoted hook suspended from each truck and a slat carried by each hook capable of rotating through 90 from an open to a closed position. A manually operated chain wheel for rotating the hooks to open and close the slats, a slipping clutch, a hub keyed on the shaft carrying one member of the clutch a second member of the clutch being mounted on the chain wheel and a spring normally maintaining the hub in engagement as the chain wheel hub allowing the clutch members to slide if an obstruction occurs to stop rotation of the shaft, relatively to the chain wheel until obstruction has been removed.
2. A blind as in claim 1, having a disc formed on the chain wheel to form one clutch member the hub being keyed onto the spindle with the coiled spring housed between a flange on the hub and the disc on the chain wheel, to form a slipping clutch between the hub and the chain wheel.
3. A blind as in claim 2, in which the surfaces on the disc and on a circlip in contact with the disc are roughened or serrated to increase the resistance between the hub and the wheel unit.
GB7928113A 1978-09-09 1979-08-13 Vertical slat blind Expired GB2036144B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7928113A GB2036144B (en) 1978-09-09 1979-08-13 Vertical slat blind

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7836281 1978-09-09
GB7928113A GB2036144B (en) 1978-09-09 1979-08-13 Vertical slat blind

Publications (2)

Publication Number Publication Date
GB2036144A true GB2036144A (en) 1980-06-25
GB2036144B GB2036144B (en) 1982-12-08

Family

ID=26268805

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7928113A Expired GB2036144B (en) 1978-09-09 1979-08-13 Vertical slat blind

Country Status (1)

Country Link
GB (1) GB2036144B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4928744A (en) * 1983-08-16 1990-05-29 Hunter Douglas International N.V. Clutch for a vertical louvre blind
GB2313141A (en) * 1996-05-16 1997-11-19 Eclipse Blinds Plc End cap for a vertical blind housing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4928744A (en) * 1983-08-16 1990-05-29 Hunter Douglas International N.V. Clutch for a vertical louvre blind
GB2313141A (en) * 1996-05-16 1997-11-19 Eclipse Blinds Plc End cap for a vertical blind housing
GB2313141B (en) * 1996-05-16 2000-06-28 Eclipse Blinds Ltd Vertical blinds

Also Published As

Publication number Publication date
GB2036144B (en) 1982-12-08

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PCNP Patent ceased through non-payment of renewal fee