Patent GB-190926453-A (GB)
Title: Improvements in Type-writers.
Inventor: MIRUS EHRENFRIED
IPC: B41J1/32
Filed: 1909-11-15
Granted: 1910-11-15
Abstract: 26,453. Mirus, E. Nov. 15. Type - wheel actions. -The type-wheel 1 is journaled in a swing- ing tube 5, and rotates to bring the selected t y p e opposite the printing-point during the latter part of the swing ; the rotation is arrested when the type is a short distance from the printing-point, this distance being constant for all the types. The setting - devices are then released, and the wheel swings forward for impression without rotating. The wheel 1 is secured to a spindle 4, which is journaled in the tube 5 carried by trunnions 29. The wheel is connected by two balljointed links 2 to two frames 3 which are pivoted on rods 17. The key-levers 8 are each pivoted on a lever 10, which is pivoted at 25 and is adapted to raise one of a series of graduated stops 9. The levers 10 all abut on a pivoted frame 7, which is suspended from the rods 17 and engages a roller 6 on the tube 5. When a key is depressed, the frame 7 by engagement with the roller 6 swings the tube 5. The wheel does not rotate until the projected stop 9 engages one of the frames 3, the further swing of the tube then causing the wheel to rotate through the angle required to bring the selected type opposite the printing-point. The middle type is brought to impression without rotation of the wheel. The swing of the tube and the consequent rotation of the wheel are arrested positively by the following device. The spindle 4 is provided with a cam 12, which comes into engagement with rollers 11<b> on a slide 11<a>, the backward movement of the slide being arrested by the engagement of a cross-bar 13 thereon, with the rear part. 14 of the selected stop 9. The cam 12 has a straight face which engages the frame 7 and prevents the wheel from rotating during the first part of the swing of the tube 5. The wheel is swung forward for impression in the following manner. The slides 16<a> are mounted in guides 16<b> secured to plates 64 by means of bars 69. The stops 9 are mounted by slots on a bar 15 which connects the plates 64. The plates 64 are mounted on trunnions 65 and are normally prevented from rotating by means of a cross-bar 26 carried by plates 27 pivoted at 28. When the swing and rotation of the wheel have been arrested by the stop part 14, a roller 31 on the wheel engages a lever 30 and by means of a lever 62 swings the plates 27 and frees the crossbar 26 from the plates 64. The whole action, excepting the front of the frame 7, the levers 10 and the key-levers 8, then swings forward bodily about the trunnions 65 and carries the wheel to impression. Returning-springs 20, 21 are provided for the stops 9 and the key-levers 8, and returning-springs are also provided for the trunnionframe 64 and type wheels. Case-shift mechanism.-The wheel is adapted to be shifted for change of case by means of two keys 67 which are connected to the rods 17 by levers 68 and links 68<a>, the rods 17 being secured to slides 16<a> which carry the trunnions 29 of the tube 5. The levers 68 engage the levers 10 and raise the stops 9 when the wheel is raised. The slide 11<a> is mounted in guides 66, which are carried by the rods 17 and are raised thereby. Letter-spacing mechanism.-The devices for feeding the paper 22 are of the kind described in Specification 13,138/05. The devices comprise a slide 33, which in the present instance is carried by a rod engaged by the lever 30.