Patent GB-190609951-A (GB)
Title: Improvements in Electro-automatic Mechanisms for Displaying Advertisements
Inventor: JOHNSON WILLIAM BURGELAND
Filed: 1906-04-28
Granted: 1907-04-25
Abstract: 9951. Johnson, W. B., [Vara, F. de B. y P. de]. April 28. Advertising.- Consists of improvements on the invention described in Specification No. 25,000, A.D. 1901. Advertisements which may be displayed in connexion with a lantern or otherwise are carried on bands which are wound intermittentlyfrom one roller to another and are then automatically reversed, the mechanism being controlled by a series of electromagnets. Bands 44, 45 are attached to rollers 1, 25 and 28, 31, respectively, and pass over guiderollers 2, 26 and 29, 32, each consisting of two conducting sections separated by an insulating part 3, 27, 30, 33, adapted to be bridged over at intervals by contacts arranged on the bands. A motor 10 drives wheels 9, 8, the wheel 8 being mounted loosely on a bush 7 attached to the middle section 5 of a shaft 4. The sections 4<1>, 6 of this shaft carry oppositely-disposed ratchets 11, 12 adapted to engage pawls 13, 14 attached to an axis 15 carried by a piece 16 on the bush 7. The pawl 14 is prolonged to an arm 17, the motion of which is limited by two stops 18, 19 on the wheel 8, Fig. 5. The sections 4<1>, 6 of the shaft 4 carry wheels 21, 22 which drive, through chains 46, 47, wheels 23, 43 and 24, 34 attached to rollers 1, 28 and 25, 35, Figs. 3 and 4. Disks 35, 36, 37, 38 are provided on the rollers to retain the band against lateral motion. The direction of motion of the motor 10, and therefore of the wheel 8, determines which pawl shall be engaged, and in what direction the bands shall be wound. The motor is controlled by the electro-magnets and switches shown in Fig. 6. Armatures 75, 76 are attached to rods 49, 50 and 51, 52, respectively, carrying contacts and pivoted at 92, 93, and an armature 82 attached to a piece 84 is pivoted at 83. Wires 95, 96 are connected to the field winding of the motor, wires 99, 100 are for reversing the motor, and wires 97, 98 may be connected together or may go to a series field winding ; the wire 97 is connected to a resistance 94 and the wire 98 to mercury cups 64, 67. When the electromagnet 77 has attracted the armature 75, the arms 49, 50 are inclined to the right, making contact in the cups 64, 65, 68, 69, the first three of which are connected to the terminals 98, 100,99 of the motor. When the contact-maker 90 of the clock apparatus 89 makes contact with the piece 91, it closes the circuit of the magnet 81, which attracts its armature 82, making contact at 88 and closing the circuit of the magnet 79, which in turn attracts its armature 76 and closes the contact 71. The main current then takes the path 52, 72, 69, 68 to the motor at 99, and causes the pinion 9 to rotate in the direction of the arrow. From the motor the current takes the path 100, 65, 56, 55, 64, 98,97 to the resistance 94, which regulates the speed of the motor, and thence flows to the return wire. When contacts on the band 44 touch the cylinders 2, 26, current passes by the path 83, 82, 84, 85, the cup 85 being in contact with the piece 87 as the circuit of the magnet 81 is broken by the clock, and flows thence to the magpet 80, which attracts its armature 76, thus opening the contact 71 and stopping the motor until the clock again completes the general circuit. To stop the motor immediately the contacts touch the cylinders 2, 26, the motor armature is short-circuited by the contacts at 73, 74 which are connected to the terminals 99, 100. When all the advertisements have been thus intermittently displayed, the apparatus is reversed by means of a contact on the band 45 touching the cylinder 29. This closes the circuit of the magnet 78, which attracts the armature 75, breaking the motor circuits at 64, 68, and making them again at 67, 70, so that the current enters the motor by the terminal 100, thus reversing the motor until the bands have been wholly wound back again, when the other contact on the band 45 touches the cylinders 32, thus making the circuit of the magnet 77, breaking the motor circuits at 67, 70, and making them at 61, 68, so that the current again enters the motor at 99.