Patent GB-190728308-A (GB)
Title: Improvements in Combined Adding and Recording Machines.
Inventor: BLUM MAX
Filed: 1907-12-24
Granted: 1908-12-24
Abstract: 28,308. Blum, M. Dec. 24. Typewriters and like machines.-In a singlebank key-operated printing adding - machine, a single item printing-wheel is employed, together with a totalizing-counter having a printing-wheel and associated parts for each denomination ; upon depression of one of the ten lever amount keys, the item - wheel starting in the units denomination is differentially rotated, the corresponding wheel of the totalizing - counter being simultaneously actuated ; the digit of that denomination is then printed and the item-wheel immediately spaced laterally to the next higher denomination. After all the digits of an item have thus been recorded, the paper is fed by means of a line-spacing key T, from which the transfer action on the totalizing- counter is also completed ; totals are printed by means of the key S. The machine comprises means for : (1) differentially setting the itemwheel ; (2) printing items ; (3) spacing laterally (4) spacing the lines ; (5) printing the total (6) inking the type-wheels. (1) The amount keylevers, Fig. 3, are loosely pivoted upon a sleeve 12 surrounding the fixed shaft 12<a> and their rear ends lift through varying distances the staggered arms h upon a sleeve g which by means of a sector and pinion 4, 5, rotates the item printing-wheel e ; overlying the levers is a universal bar 14 controlled by a dashpot and rigidly attached by arms to the sleeve 12 from which the printing and lateral spacing operations following the depression of any key are derived. At the end of the prescribed upward movement of an arm h, the universal bar makes contact with and rocks the upper arm of the lever 15, 13, whereby the arm 13 presses against the conical member 11 on the sleeve g and laterally slides all the arms out of the path of the key-levers, so that they may be reset to normal position, together with the itemwheel, by means of an adjustable spring 22. (2) Before this resetting occurs, the digit of the item is printed by means of a transverse inking- ribbon carried by a frame 130, Fig. 10, adapted to turn and slide upon the spindle 131. As the universal bar and sleeve 12 are rotated, the parts 137, 136 slide the frame rearwards so that, as the cam 93 on the sleeve affects a depression of the bevelled projection 140, the whole frame may be tilted upwards about the spindle and then suddenly released to allow the spring 134 to force the ribbon upon the paper overlying the item wheel and print the digit. (3) The lateral spacing movement is also derived from the sleeve 12 through the arm 40 which depresses the rod 42, Fig. 4, and thereby presses a ratchet - rack 31 through one step to the left, carrying therewith the shaft to which the item-wheel is fast and with which the setting - pinion has a feathered connexion. A similar fixed rack 32 immediately behind acts as a detent. (4) The line-spacing key T is operated at the completion of each item to feed the record strip which is carried on a reel 176 at the front of the machine and passes under the inking-ribbons and between the feed roller c<1> and a pressure roller c above it which may be lifted to stop the feed. The feeding of the roller c<1> is effected by the slide 79, as shown in Fig. 10, through an amount determined by the position of the three-step adjustable cam 87. This key also rocks the lever 48, 49 to depress both spacing-racks, and simultaneously by the pin 44 the arms 43 ; the spring arm 50 is thus free to restore the itemwheel shaft to unit position, and the spring return of the arm 43 ensures return of the racks. (5) To print the total, the key S is depressed, whereby the paper is given a considerable feed by means of a special rack 107 and a ratchet-wheel on the shaft of the feeding - roller; subsequently by means similar to that described for the item digits, the inking-ribbon frame 148 is lifted and then brought down upon the total type-wheels by a spring. An interlock provided by the parts 107, 108, 109 ensures that a total shall only be taken when the item-wheel is at the unit denomination. (6) Means for automatically feeding and reversing the inking- ribbons is shown for the total ribbon in Fig. 15. As the carrier rises and falls the lever 157, pivotedthereon at its lower end, is displaced by contact of its pin 158 with the fixed end 160 of an adjustable stop, and thereby actuates through the double pawl 163 one or other of the ratchet feed-wheels 155, 156 according to the position of the two-armed feeler 162 which is spring controlled on the shaft 161 and adapted to snap over owing to filling of the spools. Spring-mounted printing-blocks 154 may also be provided on the carrier.