Patent GB-1088709-A (GB)
Title: Margin setting device for a typewriter
IPC: B41J29/50
Filed: 1965-08-02
Abstract: 1,088,709. Typewriters. ING. C. OLIVETTI & C. S.p.A. Aug. 2, 1965 [Aug. 1, 1964], No. 32918/65. Heading B6F. An electric typewriter is provided with a margin setting device and a tabulating mechanism the device comprising a ball 72 for locking a margin stop 8 or 9 (not shown) and for disengaging same from a rack 7 and the bail 72 is conditionable by a key 117 which simultaneously conditions the tabulating mechanism to set the marginal stops 8, 9 in the columnar positions of the next following or preceding set tabulating stop 21 in the advancing direction of the typewriter carriage 6 depending on whether the key 117 has been depressed through a partial or full distance. Tabulating mechanism; tabulating key actions. -Tabulating mechanism is operated on depression of a tabulating key 64, Fig. 3 (not shown), in a manner as described in Specification 1,088,179. Margin stops.-Margin stops 8, 9 are settable on the carriage rack and adapted to co-operate with a central counterstop 11 with their depending projections 17. Each stop is provided with a slide 12, Fig. 4 (not shown), slidable along two bent lugs 13 and having a pin 14 engaging the gaps between the teeth of the rack 7 under the bias of spring 15 engaging a second pin 16 on the underside of slide 12, Margin stops are also provided with two pins 78 engaged by a lug 47, Fig. 1, of bail 72. Margin - setting mechanism; margin - setting power assisted key actions.-Depression of margin setting key 112 rocks lever 97 to displace a slide 94 forwardly so that its shoulder 101 is placed into the path of a bail 39, whilst its projection 102 engages a lug 105 of a latch 103 which is rocked clockwise. Simultaneously lever 97 rocks a pawl 113 whose lug 114 operates a bail 56 to set a cam 180, Fig. 3 (not shown), in operation, which makes an uninterrupted cycle of one revolution in that the edge 116 of the stem 111, Fig. 1, rocks the lug 115 to disengage the lug 114 from the bail 56. As cam 53 rotates bail 39 raises slide 94 upwardly whose projection 93 engages pin 92 on lever 87, the latter rocking margin setting bail 72 into engagement with the margin stops 8, 9 through lever 82. Lug 74 of bail 72 engages between pins 78, Fig. 4 (not shown), of the margin stops 8, 9 and by displacing the carriage 6 transversely the margin stops may set in any column position. During margin setting the slide 94 is locked in its raised position by lug 102 engaging lug 105. After margin stop setting key 112 is released and slide 94 is re-set into abutting engagement with pin 99. Continued margin stop setting and tabulator mechanism actuation by multiple-action key to set margin stop adjacent selected tabulator stops. (a) Setting margin stops in columnar position of first set tabulating stop at the right thereof.- First carriage 6 is brought with margin stop 8, 9 to be displaced in contact with central counter stop 11 then margin setting key 117 is depressed through its shorter stroke until projection 129 on key stem 118 abuts bail 131, whereupon stem 118 rocks lever 119 to displace slide 122 forwardly whose projection 123 rocks lever 33 to locate pawl 30 of tabulating mechanism with its associated shoulder 38 over bail 39. Also lug 124 of slide 122 places the shoulder of pawl 127 over the bail 39. Furthermore lever 119 through pawl 121 rocks bail 56 associated with links 182, 181, Fig. 3 (not shown), to actuate the clutch 180 which set the cam 53 in motion through its first step of 90 degrees during the course of which bail 48 through arm 47, link 46, lever 43 rocks the bail 39 upwardly to displace both pawl 30 and 127 in same direction. Pawl 30 causes tabulating stop 23 to be raised, whereas the pivoted lever 26 through lateral displacement of lug 190, Fig. 3 (not shown), pivots bail 186 to disengage clutch 180 by interposing lever 184. In turn pawl 127, Fig. 1, as described above rocks lever 87 to pivot arm 82, whereby bail 72 interposes lug 74 between pins 78 of margin stop 8 or 9, disengaging the stops. Since bail 186 disables also the escapement mechanism (not shown) to permit the tabulating stroke, carriage 6 is displaced with respect to margin stop 8 or 9 locked by the bail 72 and the tabulating stroke terminates when the first set tabulating stop 21 at the right of the margin stop encounters tabulating counter stop 23, which is displaced in a manner not shown to rock the bail 186 so that lever 184 is rocked to permit the clutch to be engaged and rotate the cam 53 through its second step of 270 degrees and reset the actuated margin setting and tabulating mechanism, viz. retracting bail 72 whereby lug 74 disengages pins 78 thereby engaging the set margin stop 8 or 9 in the position at the right of the said set tabulator stop 21. (b) Setting margin stops in columnar position of first set tabulating stop at the left thereof.-In case one of the margin stops 8 or 9 is to be set in the columnar position of a set tabulating stop 21 at the left thereof, e.g. for returning a margin stop in the position prior to its having been displaced rightwardly carriage 6 again is displaced until counterstop 11 encounters the respective margin stop. Then the margin setting key 117 through its longer stroke during which the lug 129 pivots the bail 131 whose lug 136 is pressed into contact with lug 137 of lever 138 which sets it free at a time during rotation of cam 53 at the end of clockwise rotation of bail 48 a pin 146 on arm 47 thereof rocking a lever 138 thereby permitting key 117 to be depressed through its full stroke. Meanwhile the depression of key 117 has of course set pawls 30 and 127 over bail 39. When key 117 is depressed through its full stroke bail 131, Fig. 2 (not shown), rocks lever 153 through link 147, bellcrank 148 and link 151 to engage carriage return friction clutch 156, whose pulley 157 normally operates at first a line spacing pawl 158, Fig. 1, which, however, at present is disabled by clockwise rotation of arm 82 through links 177, 173 and bail 171 whose projection 170 enables lever 167 to be displaced by spring 166, Fig. 2 (not shown), of pawl 158 disengaging lever 162 which is interposed by the spring between the line spacing ratchet 159 and line spacing pawl 158. Key 117 is held depressed until the required tabulating stop 21 has passed the tabulating stop 23. Key 117 is then released causing bail 131 to be restored and carriage return friction clutch to be disengaged. Since, however, cam 53 is still rotating through its first step the tabulating mechanism is more effective and carriage 6 moved by its spring until the tabulating stop encounters the stop 23. The margin stop 8 or 9 is thus set in the columnar position to the left of the tabulator stop 21.