Patent GB-190909063-A (GB)
Title: Automatic Carriage Return and Line Spacing Mechanism for Typewriters.
Inventor: TREJO GUILLERMO
IPC: B41J11/24
Filed: 1909-04-16
Granted: 1910-03-10
Abstract: 9063. Trejo, G. April 16. Electric carriage - returning mechanism margin stops.-Carriage-returning mechanism adapted to be brought into play at any point in the travel of the carriage and co-operable with the margin devices, is described as applied to the Oliver machine. A counterweighted pulley 5, Fig. 12, driven by an electric motor 11, Fig. 2, carries a centrifugal clutch device comprising pairs of levers 12, 13, Fig. 15, so that, when the pulley rotates, the levers 13 swing outwards and cause the shoes 21 to clutch the rim of a cup 22, which is carried by a sleeve on the spindle 2 provided with winding-reels 24, 25. Oppositelyextending tapes 26, 27 of cord or metal, wound upon the reels 24, 25, are attached by forks 32, 28 respectively to a spring device 33, carried by an arm 34, and to an arm 29. Springs tend to press the arms 34, 29 outwards and to maintain the tapes in tension. The arms 34, 29 are carried by the opposite ends of the papercarriage, and the arm 34 f arms part of the line spacing mechanism. The circuit through the motor 11 is controlled by contacts 58, 59, the latter being carried by a pivoted lever 60 controlled by a conducting-spring 62. A keeper-element 64 on the lever 60 is engaged by the upstanding arm 65 of a spring controlled release-lever, the lower end 70 of which is engaged by a foot 71, Fig. 7, on a weighted trigger 72 carried by a key-operated lever 74. When the key is actuated, the foot depresses, and finally slips off, a shoulder on the release-lever thus allowing the contact 59 to move against the contact 58. The circuit through the motor is automatically closed by means of a right-hand margin device comprising an adjustable frame 81, Fig. 1, on the carriage carrying a spring- control!ed pivoted tappet 85 normally held against an abutment. During the movement of the carriage, the plate 85 actuates a finger 69 on the upper end of the arm 65 and thus releases the keeper-element of the lever 60. The closed circuit may be opened by means of a spring-controlled key-lever 89 pivoted at 91 and having a lug arranged to engage a pin on the lever 60, the lever being moved thereby to re-engage the arm 65. The circuit may be opened automatically by means of a lever 96 pivoted at 97 and engaging the pin 94. The forward end of the lever 96 engages the usual rack 95, which is slidably feathered on a shaft 99 rotatable and longitudinally movable for adjusting the right-hand margin stop 56. The adjustment of the rack corresponds to that of the stop 56. When a shoulder 101 on the rack is engaged by a projection 102, Fig. 8, on the carriage, the lever 60 is returned to its normal position. The tapes 26, 27 may be temporarily held out of the way by engaging them with a double-hooked plate 109 carried by a pivoted spriug-held arm 110. Line-spacing mechanism.-The arm 34, described above, when pulled by the tape 26, actuates a lever 40, Fig. 8, so as to slide a pawl 43 into engagement with a pinion on the platen spindle. The pawl 43 extends through an arm, which is rotatable on the platen spindle and is provided with a curved rack 50 engaged by a toothed segment 51 having an operating-rod 55. As the carriage is pulled to the right by the tape, the rod 55 engages the right-hand margin stop 56 and linespacing takes place. Stops 37, 38 limit the movement of the arm 34. A locking-lever 103 may be moved by the usual key-lever which releases the spacing-pinion on the platen spindle, so as to interfere with the stop 38 on the arm 34 and prevent line-spacing when the carriage returns.