Patent GB-189702148-A (GB)
Title: Improvement in Type-writing Machines.
Inventor: TEMPLETON ALLISON
Filed: 1897-01-27
Granted: 1897-04-17
Abstract: 2148. Templeton, A. Jan. 27. Type - writers. - Relates to machines in which the various parts are driven by power. In the rear of the framing 1 is a friction drum 5, driven by an electric or spring &c. motor. A series of keybars 8 are arranged to slide longitudinally and also pivot upon a rod 9, and they are m o v e d towards the drum 5 by levers 12, operated by the keys 17. On the end of each bar 8 is a shoe 18 having a limited sliding movement thereon and brought to normal position by springs. When the bar 8 is moved by the depression of a key the shoe 18 engages the drum 5 and the bar 8 is depressed thereby. A pin 30 passes over and is guided by a curved plate 26, provided with vertical slots for the passage of the shoes 18. At the lower parts of the slots are lateral recesses for the passage of the pins 30 so that the latter may return to normal position along the rear of the plate 26. The type-bars 31 are connected by the rods 35 to the bars 8. The platen 38 is mounted in a frame 39, pivoted in and removable from the carriage 42 which runs upon the bars 45, 46 by rollers 43, 44. The carriage 42 is moved by a screw 48, engaged by a pin 51 on the carriage. The screw 48 is tubular and is connected with its shaft 49 by a long spring which serves to drive the screw to move the carriage in one direction. The screw is driven in the other direction to return the carriage and wind up the spring by means of a pulley driven by a band from the shaft 4 of the drum 5. The pulley is clutched to the screw by a clutch, operated by a special lever 61. The clutch may also be operated automatically at the end of the line by a lever arrangement and a sliding rod, operated by the carriage. Clutched to the screw is an escapement-wheel 82, engaged by pawls 84 on a pawl holder, oscillated by a rod 100, connected to a universal lever frame 95, pivoted at 97 and extending under the key-bars 8. The extent of movement of the movable pawl 84 is limited by a pin 93, and when this pin is withdrawn the pawl moves far enough to give a double space. The pin 93 is operated by a rod 106, connected to a lever frame 102, pivoted at 103, and operated by projections 105 of the key-bars 8 representing capitals and letters requiring a large space. Two or more pins 93 and operating- mechanism may be provided. In order to make a space after each word at the same time that the key for the last word is depressed, the keyboard 16 is pivoted at 108 and further depression of the key depresses the keyboard which operates a spacing-bar 112 similar to the bars 8 but not connected to a type-bar. The platen is turned automatically for line spacing as the carriage returns to position by ratchet mechanism, operated by the margin stop bar. The movement of the pawl lever is regulated by a stop which may be adjusted for a one or two line space. The platen frame is provided with pressure rollers 126, 127, and with a paper guide 128. A paper table 124 is supported on the carriage. A pointer 129 on the platen frame moves over a scale 131. In order to move the carriage independently of the escapement mechanism, an arrangement, operated by a lever on the carriage, is provided for disengaging the clutch by which the escapement-wheel is connected to the screw. The ink ribbon is on spools, which are moved along their shafts to shift the ribbon laterally by a double screw groove on a cylinder, rotated intermittently by a pawl arrangement, operated by a projection on the carriage. The lengthwise feed of the ribbon is independent of the mechanism for shifting it laterally, and is effected by ratchets engaging the shafts with which the spools rotate. The ratchets are operated from the universal bar 95. The feed of the ribbon is reversed by means of a rod, operated automatically by the ribbon itself. This rod disengages the pawl operating the full spool and engages that operating the empty spool. The framing 2 is in the form of a casing which may be provided with' glass sides and front 164.