Patent GB-190808405-A (GB)
Title: Improvements in Typewriting Machines.
Inventor: FELL JOHN CORRY
Filed: 1908-04-15
Granted: 1908-12-31
Abstract: 8405. Fell, J. C., [Wyckoff, Seamans, & Benedict]. April 15. Typewriters.-Relates to line-lock, margin-stop, and alarm mechanism for typewriters. The platen carriage 8, 9, 10 is supported as shown in Fig. 1, and its feed-rack 14 is engaged by a pinion 15 controlled by an escapement 17, 18, 19 operated by links from the bail 29. Each key-lever is pro. vided with a hook 43 adapted to be engaged by a pivoted locking-bar 44, upon which is a hook extension 48, 49, Fig. 5, engaging the spring-controlled arm 50 of a vertical shaft 51. A crank upon this shaft is linked to a slotted stop-member 59 secured upon a short shaft 63, 64, which is mounted to rotate and slide laterally in a housing 71 attached to the bar 5 of the machine. An adjustable spring, secured to the housing and to the interior of the portion 64, serves to press the stop 59 towards the right and to rotate it, a finger-piece 61 being provided upon the stop for moving it against the action of the spring. When the portion 60 of the stop is engaged by the line-lock stop 77 on the carriage, it is moved towards the left and the bar 44 is operated to prevent depression of the keys. To the housing 71 is attached a pointer 137 which extends over the carriage scale 94. This scale is secured upon a bar 83, between which and the rail 9 is located a toothed bar 85. The linelock stop 77, Fig. 8, has a projection 80 to engage the stop 60, and a thickened portion 81 which engages behind a depending shoulder of the bar 83. Teeth on the portion 81 are pressed into mesh with those on the bar 85 by a spring 89, but the portion 81 is so shaped that pressure on a finger-piece 95 rocks the teeth out of engagement to allow adjustment of the stop. A pointer 93, Figs. 4 and 8, extends over the scale 94. If it is desired to write additional characters, the finger-piece 61 is pressed to disengage the stops 60, 80, the return sliding movement of the former stop allowing the locking- bar 44 to release the keys. A final line-lock stop 78 is situated to the right of the stop 77, and is adjustably engaged with the toothed bar 85 by a spring-controlled sliding toothed member. A finger-lever 102, Fig. 4, serves to disengage the toothed members, and a pointer 110 extends over the scale 94. The arresting-face 100, Figs. 4 and 6, is so shaped that it may occupy the same position with regard to the scale 94 as the stop-face 80, for example when it is not desired to write additional characters after the first stoppage ; but it prevents rotation of the stop 60 by the finger-piece 61, thus securing a final locking of the keys. The stops constructed similarly to the stops 77, 78 are provided near the left-hand end of the carriage for obtaining and writing in the margin at the lefthand edge of the paper. The stop for securing the first stoppage is bevelled similarly to the stop 80 on its rear face, so that the stop 60 is readily moved aside during the return movement of the carriage. An alarm, which is actuated before the line-lock mechanism, comprises a bell 113 struck by a hammer 115, the hinge portion 117 of which extends along the rod 5 and has an arm 118 beneath a lever 119, Fig. 11. A pawl 122, pivoted on the lever and controlled by a spring 125, is engaged by the stopface 80 so as to depress the lever 119 and raise the hammer 115 against the action of a spring 132. The spring 132 is attached to a lever 130 adjustable by means of a screw 134. The stop-face 100 does not actuate the alarm,