Patent GB-190400854-A (GB)
Title: A Combined Adding and Writing Machine
Inventor: HOPKINS HUBERT
Filed: 1904-01-13
Granted: 1904-05-19
Abstract: 854. Hopkins, H. Jan. 13. Calculating-apparatus.-A combined adding and writing machine, the two departments of which are conjointly or separately operable, for the purpose of printing either joint or independent records, is shown in side elevation in Fig. 3 and in sectional view in Fig. 7. The machine has a common platen whereon both departments operate to produce visible results. Commercial sheets of the usual width can be used, upon which the written and arithmetical records, aligned and visible, can be written without previous adjustment, or intermediate connecting or actuating devices. The adding key-bars 3, Fig. 3, are grouped below the writing-bars, are bent behind the pivot 4 so that their rear ends are in longitudinal alignment, and are all, except the " 9 "bar, provided with projections 5, the upper extremities of which are circularly aligned. The stop frame is drawn across the machine from right to left on the track 6 by a spring motor, and an escapement controlled by the keybars 3 governs its movement. The frame consists of arcuate plates or strips, each plate carrying nine vertically - movable stops arranged in transverse rows. In idle position, these stops are over the projections 5 on the key-bars 3, so that, when a key-bar is struck, one of the stops is operated and the stop frame is moved one stop leftwards. Fig. 8 shows the gear and type-sectors in their relation to the movable stop frame. Each gear sector 36, mounted on the sleeve 35 of the shaft 34, has a corresponding type-sector 39, the connection between the sectors being loose to permit of independent movement for a short distance. The sector frames 47, within which the types 48 are located, are released by rotation of the sleeve 35 and the forward movement of the rod 44 on the rotation of the main shaft 52. Springs 56 restore the shaft 52 and the sectors to position after each operation, but the dash-pot 57 prevents too forcible movement. The platen 60 is mounted in a frame which travels on the track 61, and is raised and lowered by two side key-bars for the writing department. The ribbon 74 is held normally below the platen centre to expose the record, but is raised to receive the stroke of the type by means of the bell-crank lever 82 and the rod 78. The guides 76 and the ribbon 74 return to their lowered position by gravity. Hammers 84 on the rotatable shaft 85 strike the types 48 against the platen. These hammers are returned to position by the rod 91 when the sectors and the link 50 move backwards, and are locked with the pawls 87. The stop frame is returned to its idle position by the pawl 100 on the arm 101 loose on the shaft 52. On the backward turning of the shaft 52, the shaft 12 is turned and the gear sector 13 thereon forces the stop frame back and the upraised stops are lowered by the projections 33. The totalizer wheels are mounted on the shaft 109 and are in gear normally with the gear sectors. The backward movement of the gear sectors operates the wheels 108 to represent the number which has been printed. The pawls or levers 126, returned to their normal position, serve as stops for the sectors. When the total key is lowered, the slide 144 is pressed forwards, and the sectors required are allowed to move forwards to register the total. To print the total, the total key is lowered to draw down the link 114 so that the shaft 52 can be operated. A repeating-key is provided to keep the stop frame stationary and print a repeat as often as desired. An error key, which, when lowered, restores the movable frame to its position at the right of the machine and dissipates the number introduced in error, is also provided. The writing-key s 157 are of the usual number, and the type-bars 161 have two arms, and each typehead 162 is provided with three characters. The type-bars are of graduated sizes, and, to render the key-touch uniform, the levers 167 are of graduated length. The platen 60 is controlled by an escapement wheel slidably mounted upon the vertical shaft 171, the upper bearing of which is attached to the connection for the platen track 61. A spring motor located at the left of the machine is attached to the platen frame and draws it leftwards when released by the escapement. When both departments are used together and after the written record has been entered, a tabulator key 187 is provided to disconnect the platen escapement and allow the platen-controlling motor to move the platen the required distance, so that the arithmetical record will be printed in its column. The ribbon is moved whenever the adding-department is operated, the operation of the main shaft 52 affecting the shaft 203 by means of the lever 207, the pawl 208, and the ratchet-wheel 209. The ribbon is also moved by the writing-keys by means of levers connected to the longitudinal members 212 and the shaft 203. The platen can be operated across the machine by the spacing-key 215, which operates the shaft 181 and the escapement. After each arithmetical item is entered, the platen is turned a short distance by means of link, pawl, and ratchet gearing, the ratchet-wheel being rigid on the platen shaft.