Patent GB-457469-A (GB)
Title: Improvements in or relating to machines for receiving and exhibiting messages
IPC: G09F11/29
Filed: 1935-05-28
Abstract: 457,469. Coin -freed apparatus for receiving and exhibiting messages ; displaying. GEE, G., 80, The Grange Drive, Winchmore Hill, London. May 28, 1935, No. 15530. [Classes 3 (i) and 27] Apparatus for receiving and exhibiting messages comprises a paper web 1, seen in Fig. 1, representing the upper part of the device, which web is wound off a roll 3 on to a roll 10, seen in Fig. 2, which represents the lower part of the device, each transfer step being made in two actions, first the unwinding of the required length from the roll 3 and then the winding of an equal length on the roll 10. The web 1 passes over a writing support 6 and behind a transparent viewing panel 2, thence over guide and roller 9 to the roll 10. A window 7 normally covers the support 6 but is automatically slid backward by coin actuation when an operator stands on a platform 29, and is automatically returned to cover the written matter when the operator steps off. The mechanism for sliding open the window 7 comprises a weight 42 connected by a chain 41 passing over a pulley 42a to the window, and for closing it a weight 45 connected by a chain 45a passing over a guide 46. The weight 42 is allowed to act when the tension of a second supporting chain 43 for the weight is removed when a person stands on the platform 29 and through a link 28 draws down a rod 44 to which the chain 42 is attached, the rod passing radially through a rock-shaft 27 and being counter-balanced by a weight 44b. The window 7 in opening moves the displayed portion of the web 1 to the dot-and-dash position shown, thus drawing off from the roll 3 a fresh portion to be written on, and the removal of the person's weight from the platform 29 allows a weight 49 to rotate a drum 51 and through a pawl 53 and ratchet wheel 48 to turn the roll 10 and wind up the loose portion of the web 1. The coinfreed mechanism for releasing the window 7 consists of an oscillatable arm 30, Fig. 5, which carries two pallets 38, 39 forming an escapement for pins 40 projecting radially from a shaft 16. The arm 30 is rocked by a rod 32 furnished with a coin-receiving head 33. Inward movement of the head 33 for a sufficient distance to take up a lost-motion connection between the rod 32 and the arm 30 is prevented by a projection on a spring-loaded lever 36, but the projecting parts of one or more coins inserted in slots 34 in the head 33 effect raising of this lever and allow full movement of the rod 32 against its spring 35. The shaft 16 carries other radial pins 17 which engage detents 11 pivoted at 12 to the frame of the apparatus and pressed up by a spring 15 to enclose a pin 14 on the window frame and lock same against movement. The shaft 16 is turned, when freed by the coinaction, by pawls 19 drawn down by a spring 25 connected to the rock-shaft 27 and up by a spring 22. A plurality of webs 1 may be arranged side by side, each with independent window and actuating mechanism, and the pins 17 are arranged, two for each window, to open each window in succession. A sliding pad 56 grips the web 1 while it is being written upon, and a door 5a gives access to the rolls 3.