Patent GB-606666-A (GB)
Title: A portable typewriter
IPC: B41J3/36
Filed: 1945-05-15
Abstract: 606,666. Typewriters. SOC. ANON. ROOY, (formerly SOC. ANON. MACHINE A ECRIRE ROCHER-ROOY.). May 15, 1945, No. 12194. Convention date, June 10, 1944. [Class 100(iv)] Portable machines; typelever actions. In a portable typewriter including keylevers 8 pivoted on a straight horizontal rod 13 and connected through links 4, 7 and intermediate levers 5 to typelevers 1 pivoted on a rod 3 curved in an inclined plane. those type-levers 1<4>, Fig. 2c. which are situated near the sides of the machine are offset upwardly and downwardly as shown at 22 as compared with the middle levers so as to enable them to straddle the support 6 of the levers 5 and rest with their free ends on the same horizontal cushion 9 that supports the other type levers, thus reducing the overall height of the machine. This offsetting also allows the type head of the end type-bars to engage the usual aligning guide 23. Repulsers. A projection 59 on each typelever 1 engages an arc-shaped spring 58 in the printing position to cause the bars to rebound. The Specification as open to inspection under Sect. 91 includes, in addition to the subject-matter of Specification 606,713 the following features: Carriage shift mechanism. The platencarriage has tracks 60, 61, Fig. 1, running on balls or rollers 62, the track 61 being supported by a member 63 which is pivoted at 64. Depression of a key 87, Fig. 9 (Cancelled), causes, through links 88, a member 89 to engage a stud 92 mounted on the member 63 so as to tilt the carriage for case-shift. Stops limit the movement of the member 63. Letter-spacing mechanism. For letterspacing, a spring-drum 67, Fig. 9 (Cancelled) and escapement mechanism are used, the drum being mounted in front of the carriage to allow of the shift movement of the latter. On depression of a keylever or space-bar 47 a projection 8<3> or 47<3> thereon operates a universal bar 46, Fig. 17 (Cancelled), fixed to a member 50 pivoted at 53. The member 50 is connected by links 35, 41, 41<1> Figs. 3 and 9 (Cancelled) to a sliding bar 108 carrying two pins 100, 101 engaging between arms of spring- pressed pawls 103, 104 which during a to- and-fro movement t of the bar 108 alternately engage the ratchet-disc 97 of the escapement and allow the disc to move forward one tooth. Back-spacing mechanism. For backspacing in steps of one letter space, a key 39<1>, Fig. 9 (Cancelled), is depressed, and a pawl 106 is actuated to move the disc 97 back one tooth-spacing, the motion of the pawl being limited by a stop 107. Keys. The line-spacing key is mounted at the side of the carriage member 63 and has a pivoted finger-piece 72, Figs. 12 and 13 (Cancelled) (not shown) which can be stowed against the side frame when the machine is to be placed in the casing 152. Margin stops. A margin stop 116, Fig. 5 (Cancelled) (not shown), adjustably mounted on a rack fixed to the carriage part 63 is adapted to engage a stop 114, Fig. 4 (Cancelled), to arrest the carriage movement. The stop 114 is part of a bellcrank lever 113 pivoted on a pin 119 encircled by a coiled spring 115 which allows the lever 113 to rock away from its support 112. To release the stop 114, a key 49, Fig. 9 (Cancelled), is depressed and operates a member 118 connected to an arm 120 on the stop 114, the lever 113 swing- ing on and moving outwardly from its support to allow the stop 116 to move over the enlargement on the stop 114. Ink-ribbon mechanism. Movement of the universal bar 46 by depression of a typekey also actuates the ink-ribbon feed by means of connection 55, Fig. 17 (Cancelled), and 38, Fig. 14 (Cancelled), which oscillate a lever 125 carrying a pawl 127 engaging a ratchet wheel 124 on the ribbon spool. A retaining pawl 128 also is provided. Similar arrangements are provided on the winding and unwinding spools, one set of pawls being masked by a member 129 while the other set are operating. When one spool is nearly exhausted, a projection on the ribbon engages pins 136 to swing a lever 133 so that its end 133<2> is positioned in the way of the lever 125. On the subsequent forward movement of the member 38, it pushes the lever 133 downwardly and this through a link 132 causes the mask 129 to move forward to lift the pawls at the same time causing the corresponding mask 129 on the unwinding reel to be moved to inoperative position through a connection 131. The ribbon guide-fork 140 Fig. 9 (Cancelled), is oscillated each time a type-key is depressed by a connection 141, lever 43 and connection 37 to a lever 51, Fig. 17 (Cancelled) which is actuated by the universal bar 46 or a member 52<1> (see below) beneath it. Alarms. A line-end warning bell 143, Fig. 21 (Cancelled) is supported by a flexible strip 144 on the carriage member 63. The hammer 147 is actuated by the engagement of the margin stop 116 with a lever 146. A spring 148 allows the bell to vibrate. Accenting arrangements. The universal bar 46 is provided with holes opposite the projections 8<3> on accent key-levers so that it is not actuated thereby and no spacing occurs. These projections, however, actuate a member 52<1> below the bar 46 to cause feed of the ink ribbon and oscillation of the guide forks 140. This subject-matter does not appear in the Specification as accepted.