Patent GB-375889-A (GB)
Title: Improvements in or relating to record-card controlled statistical machines
Filed: 1931-04-07
Abstract: 375,889. Statistical machines. BRITISH TABULATING MACHINE CO., Ltd., Victoria House, Vernon Place, Southampton Row, London.-(Assignees of Peirce, J. R.; 33, Riverside Drive, New York, U.S.A.) April 7, 1931, No. 10271. Convention date, April 7, 1930. [Class 106 (i).] Total printing. - A record-card - controlled statistical machine with automatic grouped-card control is arranged so that it may function to stop the machine (or initiate total-taking) (1) when the card-group changes, or (2) when a stop-card is read. The machine to which the invention is applied has printing mechanism, counters (but for addition only), and electric tens-transfer mechanism as described in Specification 372,365. Magnets 350, Fig. 7, may be plugged in series between upper and lower card brushes 62, 63 to detect a change of group in the columns allocated to that purpose and close contacts 353, when energized ; these contacts being in series with the stop magnet 367 or total-printing magnet 254. The armature 351, Fig. 3, of each magnet 350 latches an interposer 352 to hold contacts 353 open. Springs 354 connect opposed armatures. An energized magnet attracts its armature to release 352 so that 353 closes. Subsequently a cam 354a moves a restoring bar 356 to the right against spring 359 so that shoulders on bar 356 rock the interposers 352 to latched position and other shoulders rock bell cranks 362 to restore the armatures downwards. Circuit diagram, Fig. 7. Grouped card control. In the present instance, one card column only is used for group control so that a change in this column stops the machine or initiates total taking. A plug connection 500 is taken from the upper brush 62 for this column to socket 350a of top magnet 350, and from socket 350b a line 501 leads to the corresponding lower brush 63. From socket 421 of the allied contacts 353 a line 419 leads to socket 420. This short-circuits all the other unused contacts 353. If the group holes in successive cards agree the circuit of magnet 350 is thus energized to close contacts 353. A switch S3 is in the dotted line or full line position respectively according as the group change is to cause stoppage or total taking. Contacts CR1 close momentarily after the adding part of each cycle and at this time a circuit would be completed through 249, 404, 403, 422, CR1, 424, 367 to stop the machine (or 254 to imitate total printing), S3. 420, S1, UCL2, UCL1, 407, 241. If, however, the card group has not changed, contacts 353 are closed and provide a shunt path from CR1 to 420 through wires 423, 419 to prevent energization of magnet 367 (or 254). When energized at a group change magnet 367 opens contacts 368 to break the circuits of printing clutch magnet 39 and card feed clutch magnet 48. Contacts 368 can only then be reclosed by a total-printing cycle releasing a cam-controlled latch for these contacts. After stoppage, total printing is initiated by depressing key 363 to energize the total magnet 254 through circuit 241, 407, UCL3, 365, 254, 424, CR1 (operated from a constantly running shaft of the machine), 422, 403, 404. During this time T6 close to energize the printing clutch magnet 39, and T7 opens to maintain cam-feed clutch magnet 48 de-energized. At the end of total-printing the machine stops, but if a switch S2 is closed, the cam feed restarts automatically. Contacts 388 are closed by card feed magnet 48. Stop-card control. In this case, the stop card inserted in the batch of cards has a " 12 " hole punched in a particular column. The upper brush 62 reading this column is plugged to the bottom socket 350a and the bottom socket 350b is plugged to a socket 427 connected to cam contacts CF5 which close momentarily at the " 12 " position. The " 12 " hole in the stop card thus closes bottom contacts 353a, the socket 421a of which is connected by line 475 to socket 476 (switch S1 is open) ; a stop card thus energizes stop magnet 367 or total magnet 254 according to the position of switch S3. Printing special marks; adjusting for computing or recording only.-When listing only or when listing and counting, the group number is printed. For this the sockets of the lower brushes 63 reading the group columns are connected to sockets 411 for the columns on the record sheet in which this printing is to be effected. When counting without listing, the connections are the same and the machine is caused to perform a " group-indicating " cycle to effect the printing. When the printing clutch magnet 39 is energized it closes contacts 479 which are latched closed until released by the energization of magnet 482. Switch S4 is open for counting and closed for listing. Switch S6 is moved to the dotted position (adjacent magnet 254) for counting. Paper line-spacing. The platen is advanced by ratchet-and-pawl mechanism from shaft 157, Fig. 1 ; the constantly running wheel 16 has a double cam 158 which rocks a lever 159 so that pin 161 thereon oscillates idly along one part of an L-shaped slot 162 in a link 163. When a paper feed magnet 166 (see also Fig. 7) is energized its armature 165 allows link 163 to fall so that pin 161 passes into the upper part of slot 162, thereby carrying the link 163 with it on its next reciprocation to the left to rock an arm 156 and shaft 157 against spring 167. A pin 168 on wheel 16 and lever 169 restore link 163 upwards. During listing, with switch S6, Fig. 7, with full line position, contacts P3 energize magnet 166. P3 are actuated during all printing cycles and close before the actual printing is effected so that line spacing occurs prior to printing. For extra line spacing at total printing, contacts 176 are closed (Figs. 1 and 7), by a lever 175 and pin 174 actuated from a shaft 173 rocked during total cycles.