Patent GB-190827334-A (GB)
Title: Improvements in Typewriters.
Inventor: FORBES WILLIAM YUILE
Filed: 1907-11-23
Granted: 1909-01-25
Abstract: 27,334. Forbes, W. Y., and Rothwell, W. H. Nov. 23, 1907. Typewriters.-Relates to (1) means for supporting the platen and enabling it to be removed, (2) platen shift mechanism, (3) paper fingers for holding the paper against the platen, (4) paper-feed and pressure-roller arrangements, (5) inking- arrangements, (6) line-spacing mechanism, (7) means for making an original copy upon a sheet which is capable of manipulation independently of the sheet that is to receive a carbon copy, for condensed-record, loose-leaf book-keeping, and like purposes, and (8) means for feeding headed letter &c. paper into the machine so that the date line of the heading automatically assumes its correct position. (1). The platen carriage 13 travels upon four grooved rollers 14 which run on rails 15. Two of the rollers are journaled in the carriage frame, and the other two upon the ends of a bar pivoted at its middle to the frame. The carriage 13 is detachably coupled by means of a hinged piece 18 with the carriage-returning &c. mechanism described in Specification No. 27,333, A.D. 1908. By uncoupling the piece 18 and the line-spacing mechanism hereinafter described, the carriage may be removed. In this way, a brief may be replaced by a foolscap carriage. According to the Provisional Specification, a super-carriage is removable instead of the carriage as a whole. (2). The pivoted carriage-support 46 is connected by a link 53 with a three-armed lever 52, two arms of which are operated through links 50, 51 by two separate keys. The travel of the support 46 is limited by stops 54 on a rod 55. The shift-keys 56, 57, Fig. 7, are rockable on their levers and carry spring-controlled hooked fingers 58 capable of engaging or missing notches 59 in plates 60, according to which side of the key receives the pressure of the finger. (3). The paper fingers 78 slide upon a rod 70, and are attached to sliding rods, the ends of which bear finger-rings and extend beyond the ends of the platen. (4). The pressure rollers 77, 82 are carried by a bow plate. The paper is fed down a plate 76 into the nip of the roller 77. (5). The inking- ribbon is led from two spools 63 to a guide fork, which is vibrated by a linkage 65, 67 from the escapement lever 35. The universal frame is connected by a link 69 with a crank on a spindle 71, which carries pawls 73 alternately engageable with the spools, by moving the spindle endways. According to the Provisional Specification, two inking-pads, one for each bank of type arms, are rocked so as to touch the type just before the type strikes the paper. The pads come in contact with another pad or slab during their return movement. (6). Carried by the hand-lever 24, which is described in the Specification mentioned above, is a lever connected by a cord or wire with a pull-rod. This rod is provided with a roller engaging a bar which extends across the platen carriage and carries pawl mechanism for operating the linespace wheel 90, Fig. 9. The spacing is varied by means of an adjustable stop on the hand-lever 24. The wheel 90 has a coned extension, which is normally pressed into a socket in the platen 75, but which can be released from the platen by means of a lever 92 and cam-ended finger-lever 93. (7). A paper-holder 104 is arranged in front of the platen, Fig. 11, and receives the original of the invoice &c. The sheet to be carboned and a carbon sheet are inserted by way of the feedplate 76. The upper part 105 of the holder is hinged to the lower part, and carries a scale plate 107 and the paper fingers 78. A roller. 109 presses upon but may be moved away from the platen. (8). A toothed sector 96, Fig. 12, journaled upon the eccentric bars of a lever 99, engages during the forward movement of the lever with a pinion 97 on the platen spindle, and turns ii; an amount determined by a stop 103. The platen is not rotated during the backward travel of the lever. Specification No. 25,995, A.D. 1907, is also referred to.