Patent GB-741957-A (GB)
Abstract: 741,957. Calculating-apparatus. CLARY CORPORATION, [formerly CLARY MULTIPLIER CORPORATION]. June 8, 1953 [June 20, 1952No. 15721/53. Class 106(1). [Also in Group XVI] In a calculating machine, a pair of type wheels are adjusted by means of a single differentially-operable member which is also effective, upon movement to a predetermined position, to prevent impression movement of one of the wheels. By the invention a basically decimal machine can be adapted for non-decimal systems with a radix greater than ten in one or more orders. In the sterling machine illustrated, pence amounts are printed by a pair of type wheels 96, 97 (Fig. 12) rotatable in unison, the lower wheel 96 bearing the digits " 0 " to " 9 ", the upper wheel 97 digits " 1 " opposite the " 0 " and " 1 " of the lower wheel, and the upper wheel being moved with the lower wheel to effect an impression only when tenpence or elevenpence are registered. Amount differential and type-setting mechanism. The differential stopbars 23 (Fig. 2) are formed with steps 31 which abut a zero stop 35 or the stem of a depressed key 24 when released to their springs by forward movement of a universal rod 45. The tens of shillings bar has no steps 31 and is allowed one step of movement, determined by the abutment of an edge 54 with an aligning bail 50, upon release of its zero stop by any one of nine unit marked keys. The pence bar has fitted an additional abutment 40, to provide for the increased range of movement and aligned with " 10 " and " 11 " marked keys 21, 22 (Fig. 3) to the right of the main pence bank. Pivoted key-detent bails 34 of the two pence banks are interconnected by a link 41, so that the zero stop 35 carried by the main bail is rocked clear by any pence key. The rod 45 is yieldably connected to each of the bars by means of spring-actuated scissor levers 48 with rollers 49 engaging notches in the bars. In the case of the pence bar 23, however, the drive is made through an additional bar 57 (Fig. 3) engaged by the scissor levers and connected with the pence bar by a U-lever 59 having unequal arms to provide the increased movement required. Pinions as 141, 143 interconnected by transverse shafts transmit movement of the bars to corresponding ones of a series of idler gears 104, and these gears drive the type wheels through idlers 103. There are two idlers 104 for the two pence type wheels 96, 97; these are interconnected by a stud 150 for rotation in unison by the single pence stop-bar. Impression mechanism. Zero suppression. The type wheels are rotatably mounted on individual carrier arms 99 loosely keyed to a printer control shaft 100 clockwise movement of which allows springs 101 to rock the arms to carry the type wheels against the platen 107. Normally, however, a latch 116 pivoted on a cross-rod 117 engages each carrier arm 99 to prevent such movement. A rod 146 rocks all the latches 116 clear early in each cycle and a raised surface 125a in an arcuate slot of each idler 104 then engages under an ear 123 of the respective latch to hold it clear whilst the printer shaft 100 operates to effect the impression. In an unset order, however, the idler 104 is not moved to bring its surface 125a under the latch ear 123; the latch consequently returns into locking engagement with the type-wheel carrier 99 and prevents movement thereof to effect an impression in that order. In this way zero prints are suppressed, but overlapping ears 145 on the'pound latches ensure release of all orders below the highest significant digit so that zeros are printed in these pound orders. There are no latches 116 in the lower shilling and pence orders, so that zeros are printed in both these orders. In the upper pence order, the surface 125a on the idler 104, is set back in the clockwise direction from the ear 123 so as not to engage under the ear for fewer than ten steps of movement. Consequently depression of any one of the " 1 "-" 9 " keys, resulting in counterclockwise movement of the two interconnected pence idlers 104 through 1-9 steps, does not result in printing movement of the upper pence type wheel; this only occurs upon additional movement of the idlers, occasioned by depression of the " 10 " or " 11 " key, whereupon the surface 125a engages under the ear 123 of the upper pence latch, so permitting the upper pence wheel to print a " 1." Totalizer transfer mechanism. A transfer member 71, pivoted at 72 to a lever 73, surrounds each totalizer pinion 70 (Fig. 13) and has positive and negative driving teeth 83, 84 for advancing the pinion in either direction. At transfer, a tooth 82 on the lower wheel engages a lug 82a on the transfer member and rocks it counterclockwise or clockwise about its pivot 72 according to whether the operation is additive or subtractive. Cams 75 on a transfer shaft 76 rock the levers 73 seriatim so that set transfer members 71 advance their pinions one step in the appropriate direction. The tens of shillings pinion has five teeth 82 and effects transfer to the units of pounds at every second step. Total taking. The totalizer pinions are arrested in zero position in total taking by the abutment of zero teeth 91 thereon with stop arms 90. The tens of shillings pinion has five zero teeth 91.