Patent GB-409373-A (GB)
Title: Improvements in or relating to record-controlled statistical printing machines
Filed: 1932-10-31
Abstract: 409,373. Statistical machines. BRITISH TABULATING MACHINE CO., Ltd., Victoria House, Vernon Place, Southampton Row, London. Oct. 31, 1932, No. 30593. Convention date, Dec. 23, 1931. [Class 106 (i).] Total-taking.-In a record-controlled statistical printing machine the printer magnets (11) are operable directly from the card-reading (LB) and each printer magnet has associated contacts (61 or 22a, 221) which are operated as the result of the printer magnet being energized, to complete a circuit for the corresponding counter magnet (10). The invention is shown applied to a machine having the controlling circuits disclosed in Specification 247,200, [Class 106 (i)], and the counters being associated for total-taking purposes, with reading-out devices as set out in Specification 356,304. The cards pass upper and lower brushes UB, LB and when a card-hole is read by a brush LB a printing circuit from line 78 through control devices TC, and lines 79, 80, LB, 81, 82, 11, 83, 84 is closed ; printer magnet 11 closes contacts 61, this giving a circuit 84, 83, 85, 86a, 76, 61, counter magnet 10, 87, 78 to effect adding. Brushes 93, being geared to the counter wheels, are set according to the number on the counter ; at total-taking contacts 101 close, relay 86 is energized and opens contacts 86a whilst closing contacts 86b. The emitter 97 is rotated and contacts 86a enable totalprinting to be effected in the known manner. Hammer - impression arrangements. - The printing devices and means for closing contacts 61 for a single denomination are shown in Fig. 1. A toothed or fluted member 36 rotates whenever the main shaft revolves and has teeth 37 which coact with a tooth 38 on a link 39 pivoted to a lever 40, the top end of which actuates the tail of the printing hammer 35. Tooth 38 is normally held up by spring 57, but when the printing magnet 11 is energized it attracts its armature 45, and through link 46 rocks latch 47 clockwise. Released lever 44 is then rocked counterclockwise by its spring 48 and a spring- pressed dog 43 depresses tooth 38 into the path of teeth 37 so that link 39 is moved to the right and the hammer 35 is positively actuated from member 36. At the end of the stroke of link 39, its end is raised by an inclined surface 51 to raise tooth 38 clear of the teeth 37. As lever 40 rotates counterclockwise about its pivot 41, its end 60 closes the contacts 61 to energize the corresponding counter magnet 10. A drum 23 has duplicate sets of printing type 24 which are exposed opposite the printing line by a gap in the stationary shield 25. 27 is the record strip and 34 the ink ribbon. When lever 40 reaches the limit of its counterclockwise rotation, the hammer 35 has not yet reached the paper, but is carried forward by its own momentum to effect printing. Adjusting for computing only.-If a lever 88 is rocked clockwise from the position of Fig. 1 it holds the hammer just clear of the paper but beyond the reach of lever 40 ; so that printer magnet 11 is energized, contacts 61 close, and the counter magnet 10 effects adding, but no printing takes place. Hammer-impression arrangements.-In a modification, printing mechanism as described in Specification 204,676, [Class 106 (i)], is adapted for circuit closing purposes. When the printer magnet 206 is energized, wire 209 is raised and lever 212 is rocked clockwise to trip that type-bearing lever 202, which is opposite to it, counterclockwise against the paper 203. Each lever 202 normally latches a lever 217 carrying a brush 219 but when a lever 202 is tripped to print, it releases its lever 217 which is rotated counterclockwise by its spring so that the brush 219 bridges the contacts 220, 221 to energize the corresponding counter magnet.