Patent GB-189720130-A (GB)
Title: Improvements in Typewriters.
Inventor: KERSHAW PERCY BERESFORD WRIGHT
Filed: 1897-09-01
Granted: 1898-12-01
Abstract: 20,130. Kershaw, P. B. W. Sept. 1. Type - writers. - A line of relief or intaglio characters is set up and an impression taken from it. The characters are upon a series of adjacent bars or discs. In the machine shown in Fig. 2, the types are upon the parts F' of a series of discs F mounted to rotate independently upon a shaft G. The keys B are arranged similarly to those of a piano, and they all operate a shaft b<1> having an arm D which, through links d' and a lever d, operates a sliding spring rod d<2> which permits a sector C to move under the influence of a spring c<3>. The sector C is mounted on a shaft c and is formed with a helical row of teeth c<2>, one of which is engaged by a projection b<4> of the depressed key, to stop the sector in proper position to set the required character. Moving with the sector C is a toothed segment E which operates a sliding rack bar K guided by a roller k<7> and rod k. The rack K operates a gear-wheel e on the shaft G, from which project arms g<1> carrying a bar g<2> along which slides a type-disc setting-pawl h<2>. This pawl engages the teeth f of the type-disc opposite to it, and is then moved along the bar g<2> to the next type-disc. The pawl is moved along by a short worm h' on a square shaft h, the worm also gearing with teeth on the edge of a bar h<3>. The shaft h is turned by ratchet mechanism as the arms g<1> oscillate. The worm h' is returned to initial position by a spring &c., when it is freed from the teeth of the bar h<3>. The bar h<3> is moved for this purpose by means of a sliding bar h<5>. The set discs are held in position by pawls f<3> which may be moved to release the discs after the impression &c. by means of a bar j<1> operated by a key. The discs are returned to normal position against a stop bar f<2> by weights F<2> thereon. The lower part of the bar K slides on the upper part and is moved to set the discs for upper-case &c. types by means of two shift keys. These keys are connected by rods k<2> to a lever k<3>, k<4> connected by a rod k<5> to the movable part of the bar. The impression mechanism is mounted on side frames L pivoted to the frame at L<1> so that it can be thrown up to expose the composed line. The sliding impression bar or platen m<3> is operated by a cam M operated by an arm m and push-rod p<1> pivoted to an impression lever P. The arm m has a projection m<1> which moves a bar m<3>, carried by arms m<2>, up to the rear of the line at the time of the impression. The paper is wound on a reel R and passes under a shield r' to the rubber-covered feed-roller r<3>. The feed-roller is operated by a friction pawl r<4> on an arm r<5> connected by a rod r<7> to an adjustable block on a lever r<8> operated by a push-rod p<2> connected to the lever P. An ink ribbon passes from a reel N over the platen m<3> to a winding-reel n<2> driven by a ratchet operated by a rod n' connected to the lever r<8>. A cover or casing a' encloses the mechanism. The Provisional Specification describes also an arrangement for setting type-bars, consisting of a slotted plate having a sliding movement limited by the depressed keys, and connected with the type-bars.