Patent GB-422668-A (GB)
Title: Improvements in record controlled statistical machines
Filed: 1934-03-12
Abstract: 422,668. Statistical machines. COMPAGNIE DES MACHINES BULL, (formerly SOC. H. W. EGLI BULL), 29<bis>, Avenue Gambetta, Paris. March 12, 1934, No. 7804. Convention date, March 11, 1933. [Class 106 (i)] A statistical machine in which the perforated record-cards or bands are read electrically, has control devices which are wholly mechanical and which, after a change in the group-designa. tion number has stopped the normal tabulating, effect total-printing, resetting of one or more counters to zero, and then restarting of the machine upon normal tabulating. The invention is illustrated in a card-controlled machine and when a change in group is detected, a bellcrank 3 is rocked counterclockwise by spring 104 into the path of the end 4 of a clutch pawl which latter is thereupon rocked to declutch the shaft 1 from the shaft of the driving motor. Two control bars 19, 18 are pivoted at 20, 21 and raised by springs 22, 23. Offsets 28, 29 on bar 19 pass across the edge of bar 18, so that if bar 19 swings to the right it carries the bar 18 with it. A roller 26 on bar 19 is operated by a cam 10 on shaft 1. A lever 17 has a roller 16 actuated by a cam 9 on the constantly running motor shaft. During normal tabulating, the cam 10 swings bars 19, 18 to the right whilst cam 9 depresses lever 17 so that a nose 35 on bar 18 is beyond reach of the end 37 of lever 17. At a group change when shaft 1 is declutched, cam 10 comes to rest so that its flat 11 is opposite roller 26. At the next depression of lever 17, parts 37, 35 coact to move bar 18 downwards. A nose 36 on bar 18 meets offset 28 on bar 19 and carries the latter down so that its nose 27 is locked beneath pawl 30. When parts 37 and 18 next rise, the nose 36 moves against offset 29 so that bar 18 is swung to the right out of reach of lever 17. When bar 18 moved downwards it rocked bell-crank 51 to remove the end 47 of bell-crank 48 from pawl 46, 43. The latter is pivoted to a plate 41 rigid with cam 39 and total-printing shaft 55. Pawl 43 engages a constantly-rotating ratchet 38. Shaft 55 rotates to effect total-printing and at the end of a revolution, the clutch pawl 43 is disengaged by bell-crank 47, 48. Towards the end of this revolution, part 40 of cam 39 moves link 65, 66 to the left to rock lever 69 clockwise about pivot 72. The end 73 of lever 72 removes bell-crank 87, 74 from a pawl 86, 82. The latter is pivoted to a plate 79 rigid with cam 78 and counter reset shaft 56. Pawl 82 engages a constantly rotating ratchet 77. Shaft 56 rotates to zeroize the counters and at the end of its revolution, pawl 86 is tripped by bell-crank 87. Near the end of this rotation, the part 81 of cam 78 moves link 97 to the left (this link having been allowed to rise by linkage 96, 93, roller 95 and cam 10) so that bell-crank 98 lowers rod 100, a pin 101 on the latter thereby rocking bell-crank 3 out of the path of pawl 4, so that the latter reclutches the shaft 1 to the motor shaft for the next card group tabulation. During the rotation of cam 78 a part 80 on it rocks a bell-crank 89 to lower the lever 66 out of engagement with cam 39 so that lever 66 returns to the right, lever 69 rotates clockwise and bell-crank 74 can return counterclockwise to trip the pawl 86. Specifications 380,472 and 419,983 are referred to.