Apparatus for accurate adjustment of the slats in a venetian bli

Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – Venetian blind type

Patent

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Details

1601761, E06B 926

Patent

active

052380432

ABSTRACT:
A venetian blind includes a plurality of slats, rotating means for rotating the slats from a first closed setting through a plurality of open settings to a second closed setting, and indicating means for indicating when the rotating means has rotated the slats to one of a plurality of predetermined desired settings, including at least one open setting. In preferred embodiments of the invention, the means for indicating includes a cam that rotates as the tilt rod is rotated. The cam has a substantially annular perimeter with a number of detents at predetermined locations corresponding to the predetermined desired settings of the slats. A spring clip is biased toward the perimeter of the cam such that a portion of the spring clip travels along the perimeter of the cam when the cam is rotated and engages a detent when it becomes aligned with the detent. The engagement of the spring clip with the detent will provide a visual indication to a user that a predetermined desired setting of the slats has been achieved since the slats will jump to the desired setting as the user rotates the slats to a position that is close to the desired setting. When a desired setting has been achieved further rotation of the slats will be impeded to provide a tactile indication to the user that the desired setting has been achieved.

REFERENCES:
patent: 909927 (1909-01-01), McKnight
patent: 1097812 (1914-05-01), Malmgren
patent: 1324421 (1919-12-01), Biasucci
patent: 1845870 (1932-02-01), Fowler et al.
patent: 2206796 (1940-07-01), Williams
patent: 2529229 (1950-11-01), Sherwood
patent: 2568324 (1947-02-01), Den Dulk
patent: 2849062 (1957-05-01), Bonsteel
patent: 2914122 (1959-11-01), Pinto
patent: 3921695 (1975-11-01), Debs
patent: 5038843 (1991-08-01), Sommerfeld

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