Apparatus for lifting and tilting slats in a venetian blind

Details Apparatus for lifting and tilting slats in a venetian blind Apparatus for lifting and tilting slats in a venetian blind

1991-10-11

1992-06-23

Johnson, Blair M.

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

Venetian blind type

1601761, E06B 930

Patent

active

051234726

ABSTRACT:
According to the present invention, there is provided an apparatus for lifting and tilting slats in a venetian blind, comprising: a head box; a rotating shaft; ladder drums rotating together with the shaft; drum holders for supporting the ladder drums; ladder rings of an open ring shape and fitted around each of the ladder drums; ladder cords being put on, and secured to, each of the ladder rings; lifting drums; lift cords, wound around each of the lifting drums; slats; and elements for stopping the rotation of the shaft. The apparatus is characterized in that the elements for stopping the rotation of the shaft comprises: a stopper holder on a head box; a drum stopper of a ring shape, axially not slidably, but rotatably, attached to the stopper holder; a stop ring of a ring shape, axially slidably, but not rotatably, attached to the stopper holder; and a spring for axially pressing the stop ring against the drum stopper, the drum stopper and the stop ring having teeth formed on the mutually opposite ends of the drum stopper and the stop ring so that the teeth are engageable with each other. The lifting drum and the drum stopper are engaged so that the drum stopper rotates together with the lifting drum. The lift cord is put on the stop ring, and is hung downward.

REFERENCES:
patent: 2737235 (1956-03-01), Hediger
patent: 3260302 (1966-07-01), Griesser

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