Patent GB-191213255-A (GB)
Title: Reel Operating Mechanism for Display Devices and the like.
Inventor: MANTLE JOSEPH GEORGE CLAUD
IPC: G09F11/29
Filed: 1912-06-05
Granted: 1913-07-07
Abstract: 13,255. Mantle, J. G. C. June 5. Reel and web apparatus.-An advertising web is provided with a primary driving-element 25, Fig. 8, which is intermittently driven, a secondary driving-element, a disengageable connexion 26, 29 between them, mechanism actuated by the web for disengaging the connexion during a movement of the primary driving- mechanism and means for placing the connexion in the disengaged position when the primary driving-element is at rest. Mechanism is also provided for starting the web at a gradually increasing speed and stopping it at a gradually diminishing speed. A motor 4, Fig. 8, drives a drum 16 through a ratchetconnexion, and effects a rotation at a reduced angular speed of a wheel 20, Figs. 8 and 10, carrying a stud 21, which rotates a slotted wheel 22 intermittently at a speed, which first gradually increases and then diminishes. The wheel 22 drives gear-wheels 25 and a drum 26, which is loose upon a shaft 27 and is permanently connected to a rotatable drum 28, capable of being shifted into and out of mesh with a toothed wheel 30, attached to a shaft 27, which drives the web. To provide for the change of diameter of the reels as the web is wound on and off them, the web controls the clutch 28. A projection 10 on the web comes from the left, Fig. 4, and strikes a spring- controlled finger 47 and rotates a lever 41 about a pivot 42, and forces the parts of the clutch 28, 30 apart. The web stops although the clutch-part 28 may continue to rotate. In order that the projection 47, Fig. 4, shall return to its original position immediately it has been carried forward, the stud 21, Fig. 10, strikes a cam 53, rotates a shaft 54, and causes a projection of the shaft to act on the arm 31 and pull the projection 47 out of the way of the lath 10; thereby allowing a spring to return the piece 47 and its connected levers to the position shown in Fig. 4. Reversal of the travel of the web is effected by a screw 68, Fig. 10, carrying a bevel-wheel, which engages a pair of bevel-wheels on a shaft, each of these bevel-wheels carrying an intermittent drive of the type of the drive 20, 22, Fig. 10. A bevelwheel is selectively brought into gear by levers, connected to a nut 82. At each step of the wheel 22, the screw 68 is rotated and the nut 69 is moved until at last it strikes the stop 82 and lowers it so as to throw the screwdriving gear over and reverse the intermittent drive of the screw 68, at the same time carrying over the clutches 63, Fig. 8, and changing the drive from one of the shafts 59, 60 to the other so as to reverse the travel of the web. By turning the screw 83 through the wheel 95, the position of the stop 82 is adjusted so that the reversal occurs when a particular number of web-sections have been shown. The vertical position of the wheel 95 on a spring 116 shows the direction of travel of the web before stoppage, a worm on the screw 68 and a wheeldial gearing therewith indicates the number of sections passed, and a worm on the screw 83 and a wheel-dial connected therewith shows the number of sections still to be displayed. A cam 108, Fig. 8, on the wheel 20 controls a spring- pressed rod, which engages a switch, composed of two spring contacts or terminals so as to switch the lamps on only when the web is stationary.