Patent GB-190118509-A (GB)
Title: Improvements relating to Type Writing Machines
Inventor: MOYA HIDALGO
Filed: 1901-09-16
Granted: 1902-07-31
Abstract: 18,509. Moya, H., and Chattaway, J. G. Sept. 16. Type-writers. - The key levers 3 are pivoted on a transverse bar 2. Beneath each half of the keyboard is a frame 5, hinged at 6 and carrying a diagonal bar 8, which lies under all the key levers in the e half - keyboard. Owing to the diagonal direction of the bar 8, the frame 5 is depressed to varying extents by the depression of the various keys, all of which have the same stroke. The inner ends of the frames 5 carry vertical arms 11, having forked ends 11<a> adapted to engage with helical or inclined rods 13 carried by the vertical shaft 14. As the forked end 11<a> of the frame 5 descends, the helix 13, it effects a rotation of the shaft 14 to right or left, according to the section of the keyboard in which the depressed key is situated. Pivoted at 19 to the machine frame is a rocking frame 18, the front portion of which constitutes a universal bar lying under all the key levers. The rocking frame carries an adjustable screw disc 20 and a vertical rod 21, which terminates in a presser-foot 22. Loosely mounted on the shaft 14 are collars 23, 24 connected by a bar 25. The collar 23 has an angular recess 26, which is normally seated firmly under the tension of a coiled spring 35 on a #-shaped pin projecting from the shaft t4. The collar 23 carries a number of spring metal radial arms which terminate in type-blocks 28, each of which bears three types. Instead of independent radial arms, a flexible disc may be employed which bears all the types on its upper surface. When a key lever is depressed, the forked arm 11<a> effects the rotation of the shaft 14 by its action on the helix 13, so as to bring the proper type beneath the impression-point. This rotation is stopped by the contact of a stop-arm 29 on the arm 25 with the lifted rear end of the depressed key lever. The depression of the frame 18 causes the disc 20 to lift the sleeve 24, arm 25, sleeve 23, and type disc or arms, thus pressing all the type blocks against the inking-pad 32, except that which has been brought beneath the opening 30 in the cover-plate 31. The further rotary movement of the shaft 14 after the stop-arm 29 has been arrested causes the #-shaped pin on the shaft to exert a cam-like action on the side of the recess 26, and assists in raising the type disc. During the final part of the downward stroke of the frame 18, the presser-foot 22 carries the typearm through the slot 30, and effects the impression on the paper carried by the platen 33. Stop arms 37, extending from the shaft 14, co-operate with the forked arms 11<a> to bring the type-disc back to the correct normal position after each operation. The paper carriage 34 is supported by a frame 45 pivoted at 46. A shift-key lever extends forwards from the frame 45, and bears a key by the depression of which the frame can be rocked forwards for change of case. The button of the shift-key is carried on a flexible stem, so that it can be arrested by either of two stops, thus enabling the platen to be moved forwards to receive the impression from either the second or the third type on the type-block. The paper carriage is pivoted to a bar 51 which slides in the frame 45. From the bar 51 depend arms 52, which carry the rack-bar 53. The platen can be raised or lowered relatively to the arms 52 by means of regulating-screws 55. The rack-bar 53 is provided with bevelled teeth 56, Figs. 9 and 10, which are masked by a plate 57, Fig. 9<a>, with the exception of two gaps 58, 58<b>. A crank pawl 59, pivoted at 60 to the frame 45, has a bevelled nose 61 adapted to enter the gap 58 and engage with the teeth 56 of the rack-bar 53. A spring 63 tensions the horizontal arm of the pawl 59 upwards, and a spring 64 tensions its vertical arm rearwards. A universal frame 65, pivoted at its centre, is provided in front with a bar which lies over the key levers, and at the rear with a foot 67 which lies over the pawl 59. When a key lever is depressed, the foot 67 depresses the horizontal arm of the pawl 59, and, owing to its bevelled shape, the nose 61 of the pawl moves outwards clear of the tooth adjoining it against the tension of the spring 64. It immediately snaps back into the next tooth, and, when the foot 67 rises, the spring 63 effects the advance of the rack-bar 53 through one tooth. A detent pawl 70 engages with the rack-bar through the opening 58<b> in the plate 57. The paper is held in contact with the platen 33 by a roller 75 journalled in dots in the paper carriage and provided with resilient bands or rings which bear on the platen.