Power drive for a venetian blind

Details Power drive for a venetian blind Power drive for a venetian blind

1975-09-08

1978-06-27

Kannan, Philip C.

Flexible or portable closure, partition, or panel

Plural strip, slat, or panel type

Venetian blind type

160107, 318266, 318467, E06B 926

Patent

active

040969037

ABSTRACT:
The upper channular frame supporting the venetian blind houses a rotary shaft parallel to the slats of the blind and from which the slats are suspended by a pair of nylon ladders. The shaft is driven by a small D.C. motor and gear reduction unit having an output governed by limit switches selectively operable to provide a predetermined limit of angular slat movement. The limit switches are incorporated in parallel branches directly in one of the power lines to the motor, with individual diodes controlling the direction of the current through the corresponding branches.

REFERENCES:
patent: 1894833 (1933-01-01), Ruby et al.
patent: 2658570 (1953-11-01), Engel
patent: 2755423 (1956-07-01), Hager
patent: 3308873 (1967-03-01), Dotto
patent: 3310099 (1967-03-01), Hunter et al.
patent: 3389737 (1968-06-01), Arnold et al.
patent: 3559024 (1971-01-01), Marder
patent: 3714535 (1973-01-01), Krivak et al.

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