GB284852A - Improvements relating to signs or destination indicators of the roller-blind type, for use on vehicles, or for other purposes - Google Patents

Abstract

284,852. Jones, S. N. Jan. 18, 1927. Reel and non-endless web apparatus. - In a sign or indicator of the type in which a blind bearing the signs is mounted on rollers, both of which are operated by a single actuating-shaft, a spring-influenced clutch element 13 is adapted to connect the actuating- shaft 5 to either roller 1, 2 according to the direction of rotation of the shaft. The clutch 13 is fixed to the shaft 5 and is provided with cam, spiral groove, or rib 14 adapted to engage a roller 16 slidable on a rod between springs 17, 18. Clutch members 11, 12 are loose on the spindle 5 and connect the upper and lower rollers through bevel-wheels 9, 10. Rotation of the shaft 5 in clockwise direction causes the roller 16 to engage beneath the rib at its upper end to raise the clutch into engagement with the upper clutch member 11 to operate the upper roller 1, the roller 16 ascending to its original position after leaving the bottom end of the rib so that the clutch is maintained in engagement. Rotation of the shaft 5 in the opposite direction causes the roller to engage the upper surface of the rib to force the clutch 13 into engagement with the lower clutch member 12 to rotate the lower roller 2. In a modification, Fig. 4, (not shown) the roller 16 is replaced by a fixed projection, the upper and lower clutch members being slidable but not rotatable on the stems 7, 8 of the bevel wheels 9 against, the action of springs around such stems. The clutch 13 is maintained in engagement with the upper or lower clutch member through engagement with the fixed projection, the spring around the clutch member returning the clutch to the original position against the stop at each revolution of the shaft 5. The first Provisional Specification describes a modification in which the clutch element 13 is in two parts separated by a spring and slidably attached to a squared portion of the shaft @3. The clutch elements 11 and 12 are always in engagement with its corresponding part of the clutch 13 so that, according to the direction of rotation of the shaft 5, one or other of the rollers is rotated.