Screen opening and closing drive device

Details Screen opening and closing drive device Screen opening and closing drive device

1988-05-26

1989-07-04

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Actuated concurrently with operation or use of art device

160331, H01H 316, E06B 920

Patent

active

048453218

ABSTRACT:
A screen opening and closing device comprising a connecting mechanism installed between a reversible motor and a pulley, wherein a pair of internal connecting elements are rotatably provided to rotate within a given range in a case, both the internal connecting elements being relatively movable as connected together in a given range with three switching positions to regulate their positions, and wherein switches are provided operable by the connecting elements so that normal and reverse operations of the motor are selectively controlled by the internal connecting elements to thereby control the opening an closing of the screen within selected limits.

REFERENCES:
patent: 2519907 (1950-08-01), Hodgson
patent: 4171473 (1979-10-01), Hiigin
patent: 4314119 (1982-02-01), Fillion
patent: 4322589 (1982-03-01), Dommat et al.

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