Flexible or portable closure – partition – or panel – Hanging or drape type – Motor operating means or electric or fluid pressure control
Patent
1979-11-13
1981-12-15
Bonck, Rodney H.
Flexible or portable closure, partition, or panel
Hanging or drape type
Motor operating means or electric or fluid pressure control
91DIG4, 92175, A47H 502
Patent
active
043054480
ABSTRACT:
A servo control mechanism for controlling the reciprocal movement of a piston member along the length of a curtain rod. The curtain rod is composed of a fluid pressure-tight tubular member made of a nonmagnetic material and having pressurized fluid supply ports therein adapted to supply pressure to opposite sides of the reciprocal piston member. A plurality of ring members, certain ones of which are made of magnetizable material, surround the curtain rod and are capable of movement along the length of the rod. A plurality of permanent magnets are reciprocally mounted inside the curtain rod and are magnetically coupled to certain ones of the curtain rings which are made of a magnetizable material. An elongated strand extends between the piston member and at least one of the permanent magnet members inside of the curtain rod so that a driven movement of the piston member will cause a forced movement of the permanent magnet therewith. The magnetic coupling between the permanent magnet and the curtain ring will cause a movement of the curtain ring with the piston member.
REFERENCES:
patent: 2005546 (1935-06-01), Jenkins
patent: 2588779 (1952-03-01), Van Der Stigchel
patent: 2973231 (1961-02-01), Reynolds
patent: 3370639 (1968-02-01), Von Brimer
patent: 3550376 (1970-12-01), Esteve
patent: 3779401 (1973-12-01), Carroll
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