Patent GB-105048-A (GB)
Title: Improvements in Typewriting Machines.
IPC: B41J21/08
Filed: 1916-01-25
Abstract: 105,048. Marks, E. C. R., (Corona Type writer Co.). Jan. 25, 1916. Line-spacing mechanism; carriage-releasing arrangements; tabulating-mechanism; line-locking devices; carriage stops.-The line-spacing lever is adapted to move the carriage feed-rack away from the feed-pinion to release the carriage and to place column stops on the feed-rack in line with a stationary tabulating-stop. The feed-rack may carry also a line-lock stop and a margin stop which can be released from a co-operating stop by the movement of the feed-rack. The invention is shown applied to the folding machine described in Specification 103,508. (1) The line-spacing lever I is journaled on the carriage B and is provided with lugs i', i<4> engaging levers i<7>, h pivoted on the carriage, the lever i' carrying a line-spacing pawl i<8>. The lever h and a lever h' at the other end of the carriage are secured to the feed-rack H, which is held in gear with the feed-pinion g<1> by s spring connected to the.lever h. The levers h, h<1> are pivoted on studs h<2> and are formed with slots engaging movement-limiting studs h<4>. The linespacing lever is rocked in the usual direction for line-spacing, and in the opposite direction to lift the feed-rack for release, the thumb being placed against a lug i<6> on the line-spacing lever to restrain the carriage. (2) The feed-pinion is locked when the feed-rack is lifted. by means of a tooth on a bell-crank q', Fig. 9, which is pressed upwards by a spring and is normally held in the depressed position by the engagement of the feedrack with a roller on the bell-crank. (3) The feedrack can be lifted by an auxiliary lever R engaging the lever h', a stop limiting the movement of the lever R. (4) Column stops P on the feed-rack are provided at the top with parts which are normally clear of the tabulating-stop O, but are placed in line with the stop O when the feed-rack is lifted to the highest position. By manipulating the linespacing lever, column-selection can be effected. The stop O is formed on a plate q, which is mounted by inclined slots on studs q<1> on a bracket e<5>, and is held in the position shown by a spring q<2>. Whan any column stop engages the stop O, the plate q is moved downwards and onwards, and the column stop is thus prevented from disengaging before the feed-rack is re-engaged with the feed-pinion. (5) The margin-stop N<1> and a linelock stop N are formed with lugs n<6> for engage ment with a stationary stop N<2>, Fig. 9, release being effected by lifting the feed-rack, either by means of the line-spacing lever or the lever R, a distance insufficient to place the column stops in line with the stop 0. The stop N<2> projects through a slot n' in the bracket e<5> and is formed on a lover n<2> pivoted to a lever n<3>, which is pivoted on the bracket, a spring n<5> normally holding the stop N<2> in the position shown. The line-lock stop N pushes the stop N<2> to the left (to the right in the rear view shown in Fig. 9) and causes the lever n<3> to lock the universal bar E and escapement by engaging a link e@ forming part of the train of connexions between the escapement and the universal bar. On lifting the feed-rack, the linelock stop releases the stop N<2>, and the spring n<5> moves the stop back to the normal position. When the feed-rack is allowed to descend, the line-lock stop depresses the stop N<2> owing to the spring in connection with the lever h overcoming the spring n<5>, and on further movement of the carriage. the stop N<2> is lifted to the normal position. The stops N, N' are formed with inclines which permit the stops to pass over the stops N<2> if the carriage has been moved into positions for writing in the margins. (6) The stops N, N' are formed with legs for insertion between teeth on the front and rear of the feed-rack and are provided with a spring n which can snap into notches n<1> in the rear teeth.