Patent GB-190715312-A (GB)
Title: Improvements in Justifying Typewriters.
Inventor: LOCK WILLIAM HENRY
Filed: 1907-07-03
Granted: 1908-07-03
Abstract: 15,312. Lock, W. H., and White, W. G. July 3. Typewriters. - A machine for writing in justified lines is controlled by a perforated strip 14, which passes from a roll 15 over a slotted bar and beneath a series of spring - pressed selecting - pins 63. The strip is advanced step by step by pin-wheels on a shaft 20 which is rotated by pawl- and-ratchet mechanism and a cam on the main shift 3. The pins 63 descend through the holes in the strip and rock bellcrank levers 67 which actuate sliding pins 71 carried by a frame 84, which is oscillated in a vertical plane by a lever 85 and cam. The projected pins 71 depress pins 79 beneath some of which are located vertically - sliding pins 100 mounted diametrally in a pair of toothed wheels 94. Two pins 100, one in each wheel, are simultaneously depressed and enter slots in two parallel sliding plates 101. The wheels 94, which are geared together, are then rotated through a rightangle by a rack-bar 96 actuated by a lever 98 and a cam on the shaft 3. The depressed pins 100 act as crank-pins and move the slides 101 through distances depending on the distances of the pins 100 from the centres of the wheels. The slides 101 are connected to a type-carrier 54 which receives a corresponding motion in two directions at rightangles.. Should more than the proper number of pins 71 be projected, the pins 79 are automatically rocked out of the path of the pins 71. The typecarrier 54 consists of a rectangular frame in which the vertically-sliding notched types are supported by springs. The selected type is depressed on to the paper by a plunger 144 actuated by togglelevers 145 which are straightened by a cam on an intermediate shaft 134. The type is inked by a ribbon carried by two spools either of which is rotated by a shaft carrying a ratchet-wheel 132 which is rotated by a finger 133 on the rackbar 96. The paper-carriage 107, which preferably supports a roll of paper, is traversed in guides 108 for letter-spacing by a rack 122 and pinion 120 connected by a friction clutch with a ratchet-wheel 119, which is engaged by a pawl carried by a spring-pressed rod 115. The rod 115 carries a number of pawls, any one of which may be depressed by certain of the pins 79 into the path of a stepped stop on the rack-bar 96. The papercarriage is thereby moved, before each impression, through a distance varying with the width of the character to be printed. The paper is advanced for line-spacing by a pair of feed-rolls actuated by a ratchet-wheel and pawls carried by a spring- pressed slide, which is normally held out of operation by a detent. The detent is withdrawn by a lever 149 and connexion 166 actuated by a pin 71 and a special perforation in the strip. The withdrawal of the detent causes a pinion gearing with a rack 168 ion the paper-carriage to be clutched to the shaft 134, where by the paper-carriage is returned to initial position. A stop 178 determines the size of the margin. During the return of the carriage, the controller-feed is locked by a lever which engages the upper part of a connecting-rod 31, the two parts of which are connected 'by a spring. The pins 63 are returned after the selection of each character by a bar 189 which engages the levers 67 and is actuated by the rack 96. The wheel-pins 100 are returned to normal position by a bar 197 which is actuated by the rise of the rocking frame 84. Change of fount is effected 'by changing the type-carrier, the stepped stop on the rack-bar 96, and the ratchet-wheel 119, and by adjusting the length of the rod 115 which is provided with an indicator. Specification No. 5718, A.D. 1895, is referred to.