Patent GB-1057531-A (GB)
Title: Interlocking device for electric typewriters
IPC: B41J29/70
Filed: 1964-02-19
Abstract: 1,057,531. Typewriters. ING C. OLIVETTI S.p.A.C. Feb. 19, 1964 [Feb. 21, 1963], No. 6848/64. Heading B6F. Type-bar machines; type-bar actions power assisted.-A power-operated typewriter having a set of type levers 7, Fig. 1, mounted on a basket 9, a set of type actions 12 associated with said levers, a paper carriage 122 and a mechanism conditionable for relative displacement of said basket with respect to the carriage is provided with an interlocking device for said type actions and said mechanism and characterized by a first element 162 or 221, Figs. 2 and 4, respectively, connected to a universal member 53 and movable along a first path at the depression of each typing key 30 for conditioning the corresponding one of said type actions 12 and a second element 161 or 219 movable along a second path intersecting said first path at the depression of a shift key 178 or space bar 185 for conditioning said mechanism, each one of said two elements when so moved being adapted to intercept the other element. In operation depression of the key 30 rocks a lever 28 which unlatches an interponent 19, Fig. 1, on the type action 12 to couple it to a common bail 33. The interposer also rocks a further bail 46, which via a link 51 rocks the universal member 53 whose arm 56 unlatches a lever 58 to set free a clutch pawl 64, whereby a clutch 64, 69 is engaged and a group of cams 43, 71, 94 are rotated for a cycle of 120 degrees. At the beginning of the cycle the cam 43 releases a lever 39 which in conjunction with a link 38 and spring 37 rocks the bail 33 and interponent 19 anticlockwise, whereby the corresponding type action 12 rocks the type lever 7 to effect an impact of types 129 or 130. Substantially towards the end of the rocking movement of the interponent 19 the cam 94 engages the lever 58, thereby releasing arm 56 of bail 53 and arresting the clutch pawl 64 to disengage the clutch 64, 69. Key interlocks; case-shift mechanism; caseshift key actions.-On depression of the caseshift key 178, Fig. 2, a projection 175 on a lever 174 engages a pin 172 on a lever 164, which is rocked to the position shown by broken lines, whereby a lug 148 on a bail 151 rocked by a spring 163 releases a projection 153 on a plate 146 causing a clutch dog 139 to engage the continuously rotating wheel 142. Rocking of the bail 151 also displaces the second element 161 into the path of the first element 162 on the universal member 53. The engaged clutch 139, 142 now rotates a cam 138 which through lever 136 rocks a bail 124 which shifts the basket 9 downwards to the upper case position. Simultaneously, the cam 138 causes a lever 169 to be rocked clockwise and a pin 168 thereon is brought into contact with the lever 164 and the lever 165 is arrested by the lug 148. Near the end of the 180 degrees cycle a pin 157 on the cam 138 engages an arm 156 and returns the bail 151, which thus brings its second element 161 out of the path of the first element 162. Also the lug 148 releases the lever 165 (Fig. 3, not shown) which locks the lug 148 so that it may arrest the projection 154 on the plate 146 to disengage the clutch 139, 142. When the shift key is released the projection 175 on the lever 174 engages the pin 173 on the lever 165, thereby permitting the spring 163 to rock the bail 151 and the lug 148 so that the second element 161 is placed in the path of the first element 162 and the clutch 139, 142 engaged the lug 148 having released the projection 154. The cam 138 is now further rocked through 180 degrees causing lever 136 to rock the bail 124 and shift the basket 9 upwards to its lower position. Near the end of the cycle a pin 158 restores the bail 151, whereby the second element 161 returns out of the path of the first element 162 and the lug 148 arrests the projection 153. If a typing key 30 is depressed before the shift key has been depressed the bail 53 is rocked and the first element 162 is placed in the path of the second element 161 preventing the bail 151 from being rocked without blocking the key 178. The bail 151 will be automatically rocked by the spring 163 when the bail is restored, whereby the operation of the caseshift mechanism is delayed until the lever has completed its impact. On the other hand, if the bail 151 has been rocked by depressing or releasing the case-shift key 178 the second element 161 is placed in the path of the first element 162 so that if a key 30 is depressed and the interponent 19 released the element 161 prevents the element 162 and bail 53 from being rocked, whereby the clutch 64, 69 cannot be engaged. The bail 53 will be rocked by the spring 26 of the interponent 19 when the bail will be restored by either of the pins 157 or 158. The operation of the corresponding type action 12 is thus delayed until the basket 9 is in either the upper case or lower case position. (b) Space-bar action.-On the depression of the space bar 185, Fig. 4, a lever 186 rocks a lever 188 and releases a lug 190 of the bail 191, while a lever 195 is urged by a spring 196 to contact the lug 190. The bail 191 is now rocked by a spring 193 and places the second element 219 in the path of the first element 221 on the bail 53. Also a projection 202 on the bail 191 releases a lug 203 of a clutch pawl ring 204, whereby a dog 209 engages a wheel 210 to actuate a clutch 209, 210 and cams 205 and 216 are rotated for a cycle of 120 degrees. The cam 205 rocks a bail 212, whereby a lug 181 operates the escapement mechanism to letter space the carriage 122, Fig. 1. Near the end of the cycle the cam 216 operates an arm 215 on the bail 191, thus removing the second element 219 out of the path of the first element 221. Also the projection 202 arrests the next following lug 203 to disengage the clutch 209, 210 to prevent repeated action of the spacing mechanism in the case the space bar was held depressed. If a key 30 is depressed when the bail 191 has been rocked by the depression of the space bar 185, the corresponding interponent 19 is released, but the element 221 of the bail 53 is arrested by the element 219, whereby the operation of the associated type action 12 will be delayed until the cam 216 restores the bail 191. On the other hand if the space bar 185 is depressed whilst the bail 53 has been rocked by the depression of a key 30 then the second element 219 of the bail 191 is arrested by the element 221 and the lug 203 is not released. Also the operation of the space bar 185 is delayed until a letter spacing has been effected at the end of impression and to this end a lever 77, connected to the lever 72, Fig. 1, via a link 76 rocks a bail 198 to place an arm 197 thereof in the path of the lug 190. The arm 197 releases the lug 190 when the lever 72 is restored, whereby the arm 197 acts as a substitute for the element 221 in locking the bail until the usual letter spacing controlled by the lever 72 is completed.