Improvements in and relating to Devices for Eliminating the Acrion of Incorrect Groups of Holes in Register Bands for Settng Type Automatically.

摘要

16,161. Lean, C., [Schnellsetzmaschinen-Ges.]. July 30. Type, setting; typewriters.-Relates to means for cancelling the action of incorrect groups of holes in perforated strips used for controlling typesetting machines. The machine for perforating the strip is provided with means for making special signals whereby lines, words, or individual symbols may be cancelled. The device is shown applied to a known perforating-apparatus with which is combined a known form of typewriter for simultaneously writing a copy of the text. The typewriter comprises key-levers 2, Fig. 1a, which are connected by rods 3 with type-levers 4. The platen frame 10 is revoluble about an axle 15 carried by the frame 16 of the paper-carriage. The carriage is moved by a spring, and its motion is controlled in known manner by four ratchetwheels 21, 22, 23, 24 to each of which is connected a bevel-wheel 25. The bevel-wheels gear with two planet-wheels 26 carried by sleeves 27 which can turn on a shaft 30. The sleeves 27 each carry a bevel-wheel 28 which gear with a planetwheel 29 attached to the shaft 30. A worm-wheel 33 loose on the shaft 30 can rotate the shaft in one direction by means of a pawl 34 and ratchet 32. A pawl and a ratchet-wheel 31 prevent rotation of the shaft in the opposite direction. The wormwheel 33 gears with a screw spindle 35 carried by the paper-carriage. Rotation of the spindle by means of a knob 36 enables the carriage to be adjusted, the wheel 33 serving as a nut. During writing, the spindle 35 acts as a rack and moves with the carriage to the extent permitted by the wheel 33. The ratchet-wheels 21, 22, 23, 24 are engaged by double pawls which are locked by levers 45 connected by links 46 to universal bars 47. Each key-lever acts on one or more of the bars 47, whereby the carriage is moved a distance proportional to the width of the letter written. The key-levers are provided with hooks 50 supporting contact-springs 53, beneath which are contact-screws 55. The depression of the keys thus closes the circuits of electro-magnets 58, Fig. 1b, which actuate the punches. The armatures of the magnets are connected with hooks 62 which pull down catches 65 and release levers 66, which are caused by springs 67 to actuate the punches 70. A bar 71, which is struck by the levers 66, causes an eccentric 73 to rotate and retract the punches. Single symbols are cancelled by means of a keylever, which is not connected with a type-lever but is provided with a hook 50 supporting a contactspring 53. Depression of the key-lever closes a circuit which causes the perforation of a cancelling-signal in the strip. The position of the paper-carriage is adjusted, if necessary, by turning the knob 36. The device for cancelling words comprises a lever 80, which is connected by a link 96 with a lever 97 supporting a contact-spring 53. Depression of the lever 80 causes the perforation of a cancelling-signal as before. The paper carriage is simultaneously drawn back, to enable the written word to be removed, by a rod connected with the lever 80 and carrying a pawl which engages a rack on the carriage. The signal for cancelling lines is perforated in front of the line signal when the paper-carriage is returned to initial position. A rod 100, Fig. 3, adjustably secured to the carriage, supports a pawl 104 which, during the return of the carriage, rotates two ratchet-wheels 107, 108. The wheel 108 depresses a pawl 109 which moves a spring 111 into contact with a screw 112. A circuit is thus closed which causes the perforation of the line signal. The rotation of the wheel 107 closes similar contacts 117, 118 in the circuit of the line-cancelling signal. The signal is not made, however, unless a special keylever is depressed which makes the circuit at another point. The circuits of the punch electromagnets are arranged as shown in Fig. 4. Each magnet except the first and last has two coils which are located in separate groups 126, 127. The depression of a key closes one of the pairs of contacts 128, 129 and makes the circuit of one or two magnets. For cancelling single symbols, a second device may be provided similar to that for cancelling words. The same device may be used for cancelling lines, provided that the movement of the lever 80 is sufficient to return the papercarriage to initial position. Keys may be provided for returning the carriage by power. A pointer is provided, which, when the platen is raised, indicates the point at which the types strike. To facilitate the adjustment of the carriage after a word has been cancelled, the space-key may be connected with a type-lever which prints a fine line or other mark on the paper between the words.