Patent GB-341050-A (GB)
Title: A record card punching machine with keyboard and electric control apparatus
Filed: 1929-07-04
Abstract: 341,050. Selective-punching machines. JACKSON, L. MELLERSH-, 28, Southampton Buildings, London.-(Siemens & Halske Akt.-Ges.; Seimensstadt, Berlin.) July 4, 1929, No. 20573. [Class 31 (ii).] Comprises a keyboard transmitter for electrically controlled card-perforating machines for statistical work, in which each perforation-group is signalled by means of a combination of five impulses. In the example illustrated, Fig. 6, each of the sections 88 .. 93 of each horizontal line contains four spaces, the holes in which stand respectively for 1, 2, 4 and 8, so that a selection of holes can be made to represent, by addition, each of the numbers from 1 to 15. Each of the six spaces in section 94 corresponds to one of the columns 88.. 93, so that by the presence or absence of holes in section 94 the number of indications representable by each of the other sections can be doubled. The groups of holes are punched successively, section by section, at the same time as the holes in section 94, if the latter be required. The same keyboard 95 serves for each section in succession, the sections being successively brought into effect by the operation of a cam 13, Fig. 2, individual thereto. Punch selection. Each key lever 2, on being depressed, moves a selection of the five bars 6 to the left, Fig. 1, by cam action on the upper teeth 7. The lower teeth 8 depress selected levers 11, pivoted at 10, Figs. 1, 2, so as to withdraw the intermediate pieces 14 from between the punches 15 and hammer 16. Only those levers 11 can be actuated whose noses 12, Fig. 2, are left free by the cam discs 13, of which one is individual to each group of levers corresponding to the sections 88 .. 93. The shaft carrying the cams 13 is rotated through one step by ratchet mechanism 21, 100 after each punching operation, and the cams 13 are so arranged that the lever-groups take effect in succession. The levers 6 on completion of their movement close at 54 .. 58, Figs. 1, 4, the circuit of the relay 64 whose armature 64a cuts in. the punching magnet 59, Figs. 2, 4, so as to bring down the hammer 16 on to the selected pieces 14 and thus to actuate selected punches 15, the ratchet mechanism 21, 100 taking effect on the return stroke to change the effective lever-group. The ordinal number of the lever-group, or section 88 .. 93, in operation is indicated through the window 96, Fig. 1, by counting mechanism geared at 98 to the shaft which bears the cams 13. Card feed mechanism. The sections 88 .. 93, Fig. 6, are punched in succession till a line has been completed, the shaft carrying the discs 13, Fig. 2, having by that time made half a revolution. Linespacing is effected by the cam 65 which, at every half-revolution, moves the escapement lever 69 either backwards or forwards and so allows the escape-wheel 70 to turn through one step. The escape-wheel 70 is integral with pinions 72, Fig. 1, acting on racks 74, Fig. 2, for feeding the cards line by line (Fig. 5, not shown). The escape-wheel shaft is also geared at 71, Fig. 1, to counting mechanism which displays the ordinal number of the line through a window 97. Distant control. The contacts 54 .. 58, Fig. 4, operated by selector bars 6, may control the selector bars 6<1> of a second machine at a distance. These contacts close the circuits of magnets 44... 48, Figs. 1, 4, whose armatures shift the levers 6<1> (or 6) through links 39. Thus, operation by electromagnets 44 .. 48 is alternative to operation by the keyboard 95.