Patent GB-375310-A (GB)
Title: Controlling apparatus for machines for evaluating perforated cards or strips
Filed: 1931-03-19
Abstract: 375,310. Statistical machines. SIEMENS & HALSKE AKT.-GES., Siemensstadt, Berlin. March 19, 1931, No. 8534. Convention date, May 17, 1930. [Class 106 (i).] Statistical cards.-In a machine for code cards or strips, the translator includes, for each card column, one electromagnet 70 and one reading feeler 3 for energizing it, the electromagnet having a single armature 56 carrying a pawl 57 which armature and pawl are moved in one direction synchronously with the card feeding and in a direction at right-angles to the first direction by the card reading. Movement in the first direction moves the pawl 57 from one to another of four code discs (41 &c.); movement in the second direction causes the pawl to adjust the code disc which it is opposite at that moment. The four hole-positions in each column 2 of the card 1 have the values 1, 2, 4, 8 respectively. The single feeler 3, on sensing a hole, allows contact 4 to close to energize the magnet 70 for that denomination, this magnet being energized several times if there are several holes in the column. When the contacts 18, Fig. 2a, are closed manually or by a card which has just left the reading station, a magnet 17 is energized to withdraw a latch 16 so that disc 15 and the main drive shaft 13 of the machine are driven one rotation by motor 5, Fig. 2, and gearing 6 .. 11, which includes a friction clutch 9. Shaft 13 drives the card feed rollers 27, 28 through shaft 32 and has rigid with it a face cam 12 operating a rod 69. A continuously-driven shaft 8 drives, through friction couplings 34, a type wheel 35 for each denomination having pivoted to it a spring-pressed pawl 36 which coacts with the internal notches 40 of four code rings 41, rotatable slightly in a cylindrical housing 50. A pawl 57 for the set of four code rings in each denomination is pivoted to the armature lever 56 (pivoted at 65) of the magnet 70. Each lever 56 may move at rightangles to the plane of Fig. 1 about pivot 67. A rod 67, acted upon by spring 68 and rod 69, has grooves to receive the levers 56. As the card hole-positions of a column are read, the cam 12 is synchronously rotated and axially moves rod 67 so that each pawl 57 is moved in succession from one to the next of its four code rings 41, pawls 57 coacting with teeth 55 on the rings. Thus when a card hole in a column is read the pawl 57 for that denomination is at the appropriate card ring, the magnet 70 is energized and the pawl 57 feeds the ring one step, where it is held by a pawl 58. The movement of the first ring moved in a denomination releases the pawl 36 and as the one or more rings are set, the pawl 36 moves round under its friction drive until it is arrested by a row of four aligned notches 40. The notches are so arranged on the rings that this new position of printing disc 35 corresponds to the value (in the 0 .. 9 notation) of the code perforations in that card column. The correct type is thus used to impress the correct number on record strip 47 by ink ribbon 49, and a printing hammer lever 43 which is actuated by a magnet 44. Subsequently all pawls 58 are removed by a rod 61 on arm 63 and cam 64 so that the code rings are released and any adjusted rings are returned to zero position by spring-controlled levers 52. In a modification Fig. 4, the code rings have slots 73 accommodating fixed pins 74,76 and a pin 75 which is movable at certain times. The pawl 57 and teeth 55 of each denomination in Fig. 1, are here replaced by notched lugs 86, projecting different lengths from the rings (as shown in Fig. 5) and a pawl member 85. This pawl is moved synchronously with the card reading by member 84 and cam 81 so that it coacts with lugs 86 in succession and when the magnet 70 is energized it depresses the lug then opposite to it to adjust the correct code ring. Subsequently the rings are restored by pin 75 which is on a lever 77 which pivots about spindle 8 under the control of cam 80 and pin 78. 90 are aligning pawls. Cam contacts 71, 72 are provided so that for cards having several successive fields in the direction in which the card is fed, only the desired card-field is rendered effective by contacts 71 to complete the reading circuit.