Patent GB-1159835-A (GB)
Title: A Mechanical Setting and/or Reading Device for Code Units on Teleprinters and similar Data Processing Equipments
IPC: H04L17/18
Filed: 1967-05-08
Abstract: 1,159,835. Telegraphy. ING. C. OLIVETTI & C. S.p.A. 8 May, 1967 [10 May, 1966], No. 21311/67. Heading H4P. A mechanical setting/reading device for a teleprinter or like comprises a plurality of units, one for each element in a binary signal, which, in accordance with the elements, are placed in one or another position, and a setting/reading member, characterized in that each member comprises a pair of oppositely tapered surfaces which co-operate with a further pair of surfaces on said member, there being means to displace relatively the member and the units to cause the member to sequentially set up the units according to the position of the member, or to cause the units to be sequentially read by the member. In a teleprinter receiver, Fig. 1, release of electromagnet 25 by the received space elements causes arm 21 to move anticlockwise from the position shown. On receipt of a Start element shaft 3 makes one revolution, carrying with it disc 4 and supports 7 and 20. Lever 18, pivoted at 19 on support 20, has a nose 18<SP>1</SP> which lies on the axis of shaft 3 and which follows the movement of arm 21. By way of arm 17 on lever 18 lever 12 is moved clockwise in response to a space element so changing the position of a wedge 13 from that shown, adjacent surface 28, to that adjacent surface 28<SP>1</SP>. As disc 4 rotates wedges 38, in succession, are guided between surfaces 28, 28<SP>1</SP>. When a wedge 38 meets wedge 13, the wedge 38 will be guided above or below the rim 5 of disc 4, depending on the present position of wedge 13. The wedges 38 are set by successively received code elements. The position taken up by the wedges is communicated via shafts 35, levers 34, and forks 33 to position transfer arms 32 appropriately. These are sensed in known manner to operate code bars. Should a wedge 38 engage the wedge 13, wedge 13 moves lever 12 clockwise until arm 43 contacts a stop which, on continued rotation of disc 4, forces wedge 13 anticlockwise so disengaging it from the wedge 38, following which arm 12 returns to the position shown. In a telegraph transmitter, Fig. 2, code bars 46 are positioned inwards or outwards by operation of a key. The ends of the code bars carry wedges 48, the surfaces of each wedge meeting at an edge 49. Arm 59, rotatably and slidably mounted on shaft 57, carries a wedge 61. As the arm rotates it is guided in front of or behind wedges 48 dependent on the position of the code bars. Axial movement of arm 59 rotates lever 65 about axis 66 and, via arm 68 moves lever 70 to left and right. Lever 70 is also raised and lowered under control of timing cam 75 and so causes lever 83 to be rocked one way or the other. Movement of lever 83 opens and closes a contact 87 so sending the telegraph signal to line. In a mechanical store, Fig. 5, the arrangement shown stores one element only of each of n  successive multi-element combinations: there is one such arrangement for each element in a combination. Movement of arm 104 to left or right to represent a code element moves slide 106. Slide 106 carries surfaces 109, 110 separated by a slot. When slide 106 is rotated one step about shaft 92 in response to a code combination these surfaces guide wedge 98 of slide 95 to left or right through the slot; the wedge is then locked behind a disc 112 which rotates with slide 106. A plurality n of slides 95 is provided. Slides 95 carry a second wedge 99 which, in co-operation with a read-out slide 116 having surfaces 118, 118<SP>1</SP>, positions the slide 116 when it is rotated about shaft 92. Slide 116 positions collar 114 which in turn positions output member 121.