Patent GB-752844-A (GB)
Title: Improvements in printing perforated record card controlled machines
Filed: 1954-05-14
Abstract: 752,844. Statistical apparatus. MAUL, M. May 14, 1954 [May 19, 1953], No. 14277/54. Class 106 (1). A punched card controlled machine is characterized in that by a manually settable device the machine may be conditioned either for interpreting, i.e. printing, on all the cards the data punched therein, or for searching, and printing on tabulator summary sheets, the data recorded in selected cards. The punched card shown in Fig. 1 has two decks of 35 columns and various fields. The upper left-hand field contains for example the title of a publication to the left field of the lower deck the publishing data and the middle field the depository of the publication and the right field the name of the author. In the right field of the upper deck each hole represents a predetermined feature, e.g. in an economic scientific publication, condition of soil, unemployment, monetary concerns, &c., up to 35 different single features. The machine is constructed so that it may print either on the record cards themselves or on summary sheets. Selection of items to be searched for is made by setting up the required data on a keyboard. The printing device comprises a row of adjacent type wheels, on a common drive and individually clutch controlled. The common drive is provided by known variable crank drive shown diagrammatically in Fig. 6. According to the invention the printing mechanism is displaced in axial direction so that it will lie either below the path of the punched cards or below the path of the summary sheet. In order to effect this, the type wheels form a unit with their associated clutches. The unit is held together by sleeves 131, Fig. 11, and can slide over guide pins 132. If the printing device is below the card path the printing hammer 133 is rocked against the card by the magnet H<SP>2</SP>, Fig. 10, if the printing device is below the summary sheet path the magnet H<SP>1</SP> will rock the hammer 134 against the sheet. The displacement of the printing device is effected by turning the knob 135 of the switching drum, Fig. 4, which is secured to the shaft 136, Fig. 9. The toothed segment 137 is secured to shaft 136. If the switching drum is shifted from sheet printing and card printing the toothed segment 137 engages the gear 139 which is mounted on the shaft 138 and turns the gear through an angle, this movement is transmitted via a pair of gears 141 to the shaft 142, having the gear 143 secured thereon. The gear 143 meshes with the toothed bar 144 which is fastened to the unit of the printing device so as to move it from one operative position to the other. The search keyboard 146, Fig. 10, is provided with 11 rows of keys each row having 5 keys corresponding to the 5 column positions. Two card pockets are provided 84, 85, Fig. 9, so these cards may be sorted physically when a search is made and the summary sheets are printed. Verification of the punching is effected by comparing the original written or printed information with the printed interpretation of the punching which has been previously effected with a hand punch from the required information. Through an impulse emitter there are always five keys of a column associated with one of the 11 verifying relays P, Fig. 7. The impulse emitter controls the comparing operation of the individual positions of the columns to be punched. The emitter is arranged at the rear of the machine driven from the shaft 147. Synchronously with the passage of the upper deck of the handle under the searching brush Sb the arm 151 slides on to five contacts 152. When the lower deck passes under the brushes the arm 153 passes over the contacts 152. From these contacts, the associated keys of which have been depressed, current flows to one of the two windings of the associated verifying relay P. When the perforations agree with the key setting both windings of the particular verifying relay are energized.