Patent GB-261083-A (GB)
Title: Improvements in or relating to record-card-controlled statistical machines
IPC: G06K15/04
Filed: 1925-08-11
Abstract: 261,083. British Tabulating Machine Co., Ltd., (Tabulating Machine Co.). Aug. 11, 1925. With printing-mechanism; ciphers and codes. -In a machine of the pin-box type wherein the sensing pins are connected to the registering or recording devices through electric circuits, a row of stops is connected electromagnetically to each column of sensing pins, and accumulator-operating means coact with the stops to add on the accumulator the amount corresponding with the stops displaced. The cards 2 are fed down a chute 3 by a blade on a lever 4 operated by gearing 6. 7. and 8 from a motor 9. Code cards being used, each card is retained in position by a lever 10 and read by sensing pins 12, any advancing pin making electric contact with a bar 13 and energizing a magnet 14 to attract its armature 15 which is then latched by a member 18 and rocks a bell crank 16 to depress a translator bar 17. There are four bars 17 side by side and passing through all four bars are eleven rectangular frames 20 each carrying a stop-pin 21, there being thus a row of stop-pins to each column of sensing-pins. The inner edges of the bars 17 co-acting with the frames 20 are notched, so that normally none of the frames encounters a row of four aligned notches, one in each bar 17. When, however, one or more holes in the card column are read, denoting a particular number, the corresponding bar or bars 17 are depressed and a certain four notches in bars 17 are brought into alignment allowing the corresponding stoppin 21 to move to the right. The lowest and eleventh stop-pin 65 is only used at total-taking to close contacts 66. When a card is in the chute 3 and the lever 4 descends, contacts 32 are closed, energizing magnet 34 which causes a clutch 35 to be engaged, thus imparting rotation to the lower part of shaft 8 and to camshaft 38. If no card be in the chute a pin 36 advances to open contacts 37 in the circuit of magnet 34, and the machine fails to operate. As camshaft 38 commences to rotate, a cam 39 closes contacts to energize magnet 40 which thereupon advances the pin-box 11. Any projected stop-pin 21 acts to arrest a bar 22 sliding in a frame 48 which is raised by arm 23, cam 25, and spring 47. Pivoted to an arm 27 on each frame 48 is a type-bar 26; whilst pivoted to the bar 22 and to lugs 42 on the bar 48 are bell cranks 44 carrying a rack bar 43. A stop-pin 21 having been projected in any row the corresponding type-bar 26, frame 48 and bar 22 rise until the latter is arrested by the pin. Thereafter the frame 48 and bar 26 rise further slightly and the consequent rotation of bell cranks 44 throws the rack 43 into mesh with a numeral wheel 49, 50. The upper bell crank 44 is locked in this position by a catch 51, cam contacts 53 next close to energize a magnet 54 which performs printing on the paper 31, and thereafter the bar 48 descends, adding is performed and the catch 51 is tripped through the operation of a fixed stop 86, a vertical shaft 75 and a pin 76 thereon. Printing totals.-By means of a total-card having a particular combination of holes the eleventh stop-pin 65 is projected to close contacts 66 and consequent energization of magnet 67 rotates a lever 69 clockwise to engage a projection 70 on the rack bar 43 which latter is thereby thrown into mesh with its adding wheel. Lever 23 is subsequently raised and rack 43 rises until arrested by an arm 56 on the numeral wheel contacting, with a zero stop-member 57 as the wheel rotates clockwise. Printing is then effected, thus closing contacts 91 and energizing a magnet 71. This forces a bar 73 to the left, to rotate a rib 74 on the vertical shaft 75 carried in the frame 48 and carrying a pin 76 which disengages the catch 51 of the bell crank 44; the racks 43 are disengaged and the frame 48, bar 22 and type bar 26 descend. Transfer mechanism.-When a numeral wheel 50 passes anti-clockwise from 9 to 0 an arm 56 rigid therewith wipes past an arm 57 raising a lever 58 and a pawl 62 between the teeth of the numeral wheel of next higher denomination, the lever 58 being latched up by an arm 64. Just prior to printing, cam contacts 64<a> close to energize magnet 60 which thereupon pulls the lever 58 and pawl 62 to the right to perform transfer. This also pulls the lever 58 off the arm 64 which is held by the stop 63.