Patent GB-189818125-A (GB)
Title: Improvements in Type-writing Machines.
Inventor: STICKNEY BURNHAM COOS
Filed: 1898-08-23
Granted: 1898-10-15
Abstract: 18,125. Stickney, B. C. Aug. 23. Type-writers.-The carriage rack 16, Fig. 2, is connected by a cord 14 to a pulley 12 secured to the carriage-driving shaft 10, which is mounted at one end within one side wall 3 of the framing, and at the opposite end upon an arm projecting at right-angles to the rear wall of the framing. The carriage-actuating spring is coiled around the shaft 10, one end being secured to the hub of the pulley 12, and the opposite end to the hub of a ratchet - wheel mounted upon the shaft and employed for adjusting the tension of the spring. Vertical racks 23, 30 respectively engage with ratchet-wheels 24, 31, attached to the ribbon spools 25, 41, and are actuated by pinions or their equivalents 22, 23 on the shaft 10. The ribbon spools 25, 41 are mounted within frames 38, 45, respectively pivoted to brackets 39, 47 secured to the top bar 2 of the framing, and the frames are connected by a rod 48 so that, when either spool is depressed, after having the ribbon wound thereon, the other spool is elevated. A spring 51 may be employed for retaining the spools in their elevated or depressed positions. The spools are detachably fitted upon movable sleeves mounted on the spool shafts. The ribbon passes over rollers 58, 59, to and fro from one spool to the other, and whilst one spool, such as the spool 25, is being filled, the corresponding rack 23 is pressed against the ratchet-wheel 24 by a spring 26, while the other rack is held out of engagement with the ratchet-wheel 31 by a finger 56 on the rod 48. As soon as the spool 25 has been filled, further motion of the rod 23 causes the spool 25 to descend against the pressure of the spring 51, and at the same time the rod 48 vibrates and moves towards the left so that a finger 55 on the rod strikes the rack 23 and disengages it from the ratchet-wheel 24. The ribbon is next wound upon the spool 41 by the operation of the rack 30, and a series of operations, similar to those above described, take place. The empty spools may be arranged to rotate independently of the ribbon during the reversal of the direction of travel of the latter ; in this case, the ribbon is not directly attached to the spools, but to curved plate springs which partially encircle the cores of the spools. The liability of a full spool to continue winding independently of the ribbon is reduced by means of stop-pieces 66 pivoted to the brackets 39, 47, and adapted to press against bosses 68 on the ratchetwheels 25, 41. The pulleys 58, 59 have a slight longitudinal motion during the passage of the ribbon, and this motion may be obtained by providing the pulleys with discs inclined to the plane of the paper and bearing against pins secured to the brackets 95. The spool 41, when in its highest position, may be rotated by hand by means of a ratchet-wheel which engages with the teeth of the rack 30 ; the other spool may be similarly rotated after transposition of the spools. The ribbon passes through slots in the top plate 2, which may be fitted with pivoted plates for closing the entrances to the slots. An alarm bell is fitted within the base of the framing, and its hammer is actuated by the driving-shaft 10, upon which is fitted an adjustable sleeve used for setting the alarm bell.