Patent GB-344919-A (GB)
Title: Improvements relating to calculating machines, especially statistical machines, controlled by perforated code cards
IPC: G06C11/02
Filed: 1929-12-09
Abstract: 344,919. Typewriters &c. SIEMENS & HALSKE AKT.-GES., Siemensstadt, Berlin. Dec. 9, 1929, No. 37781. Convention date, Dec. 14, 1928. [Class 100 (iv).] Record-controlled driving-mechanism.-A statistical machine controlled by perforated code-cards comprises four internally-notched, annular code rings one or more of which are adjusted corresponding to the code holes for the number read, the code rings 5 .. 8 transmitting their combined value to a counter-controlling disc 2 and then being carried on to a common zero position ready for the next decoding operation. The counter controlled may be replaced by type-discs, and the apparatus may be actuated by the contacts of a calculating machine closed by a keyboard, instead of actuation by perforated cards. The Figs. show the mechanism for one denomination only ; this is repeated for other denominations. The main spindle 1 is driven through gears 9, 27, 62, 61, 60 (driven by motor or clockwork) or 9, 27, 66, 65, 64, 63, 61, 60 in one direction for adding and in the other direction for subtraction. If the value is negative a special perforation in the card energizes magnet 67 to move the clutch 61 away from member 62 and into engagement with member 63. Loosely mounted on shaft 1 are three counter-controlling wheels 2, 3, 4, and four code rings or wheels 5 .. 8, all frictionally driven from shaft 1 by friction members 10 .. 14. Wheels 2 and 3 are rigid with each other and wheels 2 and 4 frictionally connected. The code wheels 5 .. 8 correspond to the numerical values 1, 2, 4 and 8 respectively and each have internal notches 15, 16 (for the two directions of operation) and outer teeth 17. Wheel 2 carries a pivoted member 18 having two pawls 21, 22 coacting with pins 23 on the code wheels 5 .. 8. These parts extend through openings in wheels 3 and 4. The code wheel 5 has two springs 25, 26 attached close to the member 18, the pawls 21, 22 of which engage either notches 15 or notches 16. Wheel 3, rigid with wheel 2, has teeth 28 engaged by a pawl lever 31 pivoted at 29 and controlled by spring 32 and cam 30. Each code wheel 5 .. 8 has a pair of escapement pawls 35, 37, the four pairs being controlled by four magnets 34 for each denomination. Pawl 35 is rigid with the armature 33 of its magnet and is pivoted at 45. Pawl 37, also pivoted at 45, is connected to pawl 35 by springs 36 and 46. A cam 43 controls the pin 42 of a lever 41 pivoted at 40 this lever having a pin 39 which coacts with a guide 38 in pawl 35 and with a lug 44 or pawl 37, this lug being between pawls 35, 37. The four pairs of pawls 35, 37 for a denomination have two levers 41 joined by a single pin 39. The shaft 49 of cams 30, 43 is driven continuously in the same direction by clockwork or the like acting on wheel 20. The wheel 2 is geared through train 50, 58, 59 to the counterwheel 51 for that denomination. When a card value, say " 7," is read the magnets 34 corresponding to the values 1, 2, and 4 are energized by contacts 57 closed by the card-reading device (or the keyboard of a calculating machine). Each magnet energized withdraws its pawl 35 from teeth 17 of its corresponding code wheel and pawl 37 engages these teeth. Immediately the magnet is de-energized, pawl 37 is withdrawn and pawl 35 engages the succeeding tooth to the one it had previously released. The code discs 5, 6, 7 (values 1, 2, 4) are thus driven forward one step by the friction members on shaft 1. The pawl 21 or 22 is forced out of notches 15 (or 16). Simultaneously cam 30 depresses lever 31 to release wheel 3 ; wheels 2, 3, 4 (and member 18 on wheel 2) are thus released and are rotated by spindle 1 until pawl 21 (or 22) meets a row of four aligned notches in the code wheels 5 .. 8. The position circumferentially of this row determines the differential amount of rotation allowed to wheel 2, and thence to the counterwheel 51. The wheel 3 is subsequently relocked by lever 31 and cam 43 raises lever 41 so that pin 39 withdraws the pawls 35 from teeth 17 of the code wheels. Pins 39 also engages lugs 44 to prevent pawls 37 engaging teeth 17. The code wheels 5 .. 8 are thus all freed and are carried round by the shaft 1 until their pins 23 rest against pawl 21. The code wheels are now in zero position relatively to wheel 2 and member 18, ready for the next operation.