Tension fixture for a curtain
AssigneeK. Bratschi, Silent Gliss
InventorHans Grutzner
Life of this patent
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Abstract
A tensioning device for use with an endless traverse which is longitudinally adjustable in both directions responsive to a rotational drive. The rotational drive includes two driving gears which are each selectively coupled with a drive shaft so that when one of the driving gears is positively driven, the other driving gear is permitted to rotate freely. The traverse changes from one driving gear to the other by passing from between a pair of overlying side walls and over a flange. Elongation resulting from strain of the traverse is continuously led out of the system so that blocking or braking of the traverse is avoided. The tensioning device is especially suitable for the operation of strip curtains or conventional curtains, as well as for curtain systems with large and heavy traverses.
Claims12
A tensioning device for use with a curtain having an endless traverse which is longitudinally movable in both directions responsive to a rotational drive means and which is subject to elongation resulting from strain:
- wherein said rotational drive means includes at least two driving gears which are operatively coupled with a common drive shaft by a freewheeling coupling such that when either one of said driving gears is operated, the other of said driving gears rotates freely;
- and
- wherein said elongation is caused to extend from between said driving gears.
For use in combination with an endless traverse having portions for supporting a curtain for longitudinal movement in both directions, a tensioning device for removing elongation in said traverse resulting from operational strain, said tensioning device comprising:
- rotational drive means for moving said traverse and including at least two driving gears which are operatively coupled with a common drive shaft by a freewheeling coupling such that when either one of said driving gears is rotated, the other of said driving gears rotates freely;
- and
- means for passing said elongation from between said driving gears so that said elongation is removed from the portions of said traverse for supporting said curtain.
Dependencies are inferred from the claim text.