Patent GB-190719355-A (GB)
Title: Improvements in Typewriting Machines.
Inventor: FELL JOHN CORRY
Filed: 1907-08-28
Granted: 1908-05-21
Abstract: 19,355. Fell, J. C., [Wyckoff, Seamans, & Benedict]. Aug. 28. Typewriters.-Relates to means for effecting connexion between the line-spacing wheel and the platen. Fig. 1 shows a section and Figs. 4 and 5 show perspective views of the mechanism, views .of detail modifications being shown in Figs. 11 and 13. A bead 5 secured to the platen 1 by wood-screws 6 is formed with a part 7 fitting in the platen and with a part 8 journaled in the frame 9. The line-spacing wheel 35 is mounted on a collar 40 formed on the head, and is held against lateral movement by the plate 38 secured to the head by screws 41. A threaded nipple 10 on the part 7 receives a threaded tube 21 to which is secured a threaded plug 20. In some cases, a threaded cap may be used instead of the plug 20. A spindle 11, to which is secured a finger-wheel 12, passes through openings in the bead 5 and the plug or cap 20, and is surrounded by a spring 19 abutting against a pin 18 and the plug 20. The threaded connexions of the tube 21 enable the tension of the spring to be adjusted. A key 16 secured by a drive fit in the spindle 11 is formed with feathers 15 which are received by a keyway 14 formed in the platen head. The spindle passes through a slot 26 in a member 23 having lugs 25 apertured to receive a pin 22. The member has slight play at right-angles to the spindle, lateral motion being prevented by tongues 30 which contact with the spindle. Rollers 29 journaled in the member 23 normally engage the inclined ends 31 of levers 32 formed with jaws 33<a> which engage a flange 34 on the wheel 35. The levers are each received by an opening 36 in the platen head and are formed with a projection 37 which rests on the bottom 38 of the opening. The spring 19 maintains the rollers in contact with the levers 32, thereby clamping the jaws 33<a> to the wheel 35 and locking the wheel to the platen. When it is required to turn the platen independently of the spacing-wheel, the wheel 12 is pushed to the right to release the member 23 from the levers 32, the platen then being free to be rotated by the wheel 12. Means shown in Figs. 11 and 13 may be provided for holding the member 23 in its released position, thereby permitting both hands of the operator to be free. In the arrangement shown in Fig. 11, the nipple 10<b> is cut away along a diameter to form recesses 45 having notches 46 formed at the end. The spindle is pushed inward to release the member 23 and is then given a partial turn, thereby turning the feathers 15<a> into the recesses 45. Release of pressure on the spindle allows the feathers to engage the notches 46, thereby locking the spindle to the platen. In a modification, the feathers are carried out of the nipple and are seated by giving a partial turn to the spindle in notches cut at the end of the nipple. The above-described means may be rendered inoperative by securing the finger-wheel 12 on the spindle 11 nearer to the frame 9, thereby shortening the travel of the spindle, and preventing the feathers from being moved into portion to engage the locking notches. In the arrangement for holding the member 23 in the released position shown in Fig. 13, the finger-wheel 12<b> is provided with a boss 12<c> formed with a groove 49. A latch 50, having a slot 52 engaged by screws 53 on the frame 9, is provided with the finger 55 which may be moved into engagement with the groove 49, when the spindle has been pushed in to release the line spacing-wheel.