Patent GB-457862-A (GB)
Title: Improvements in or relating to tabulator mechanism for typewriting machines
IPC: B41J25/18
Filed: 1935-06-05
Abstract: 457,862. Typewriters &c. REMINGTON RAND, Inc., Buffalo, New York, U.S.A. June 5, 1935, No. 16312. Convention date, Aug. 11, 1934. [Class 100 (iv)] Tabulating. mechanism; carriagereleasing arrangements.-In an automatic tabulating-mechanism for typewriting-machines, power-means for releasing the carriage from the escapement and for projecting a tabulator stop and maintaining it in projected position for a predetermined period are automatically rendered operative at a predetermined point in the travel of the carriage. Provision may be made for automatically disabling the tabulating-mechanism during power-return of the carriage, and manual disabling- means may also be provided. The automatic tabulating-mechanism may be associated with key-controlled denominational - tabulating and column-skipping mechanisms. Means may be provided for locking the printing-keys during tabulating and carriage-return. - The mechanism shown in Figs. 1, 3, and 16 comprises denomination stop-slides 83, mounted in a hinged part 75 of the framework and co-operating with column stops 84 mounted on a rack 85 on the carriage 18. The left-hand slide 83 and an additional slide 241 are employed for automatic tabulating, and key-controlled column-skipping respectively, and the remaining slides 83 are employed for key-controlled denominational tabulating. The left-hand slide 83 engages a lever 79 abutting on a slide 67 which abuts on a rock-arm 65 in connection with a rock-arm 59 which is connected bv a link 56 to a rockarm 53. A roller 52 on the rock-arm 53 co-operates with a loose cam 30 on a driving-shaft 29, a'coupling-pawl 34 on the cam co-operating, as described in Specification 410,381, with a toothed wheel 31 on the shaft when permitted by tripping-arms 39, 41 on a bell-crank 117. The remaining slides 83 and the slide 241 are connected to levers 79 abutting at the bottom on slides which on depression of the denomination keys or the column-skipping key are selectively operated by means of another cam-mechanism driven by the shaft 29 and constructed in the manner described in the above-mentioned Specification. When any one of the slides 83, 241 is projected, the carriage is released by means of a lifting-arm 132, Fig. 1, which underlies the feed-rack 22 and is connected bv a link 130 to an arm 126 on a shaft 127, another arm 128 on the shaft being connected by a link 124 and arm 121 to a universal bar 118 co-operating with the levers 79. For automatic tabulating, one or more blocks 90 are secured to a bar 87 mounted on the base of the stop-rack 85, the bar being grooved to receive projections 92 on the blocks, and being formed at letter-space intervals with threaded openings for block-securing screws 94. The blocks are of graded lengths, to provide for different jumps, and are arranged at positions corresponding to the jumps. Column stops are set in approximate register with the right-hand ends of the blocks. An arm 98 in the path of the blocks is pivoted at 101 to a support 102 and abuts on an arm 108. The support, is mounted on trunnions 104 on a bracket 105 on the top plate 20, and is provided with an arm 112 abutting on a depressible rod 114 which rests on a rock-arm 115 in engagement with the bell-crank 117. When any block 90 moves into engagement with the arm 98, a cam-face 96 on the end of the block co-operates with the arm to move rearwardly the support 102, the rod 114 is depressed, and the bell-crank 117 is rocked. Thereupon, the pawl 34 is released from the arm 39 and engages the toothed wheel 31, the cam 30 turns through part of a revolution, the arm 41 releases the pawl from the toothed wheel, and the cam is arrested. During movement of the cam, the left-hand stop 83 is projected, the carriage is released, and the rear face of the block rides along the arm 98. When the block rides off the arm, the stop 83 engages a column stop and the carriage is arrested after making a tabulating jump corresponding in length to that of the block. Thereupon, the support 102 moves forwards, the arm 41 releases the pawl 34, the cam completes a revolution, the stop 83 is returned, and the feed-rack 22 is re-engaged with the feed-pinion 26. The automatic tabulating- mechanism can be disabled by means of a finger-lever 145, Fig. 3, which abuts on a stud 144 on a link 138 connected to an arm 137 on a rock-shaft 135 carrying the arm 108. When the fingerlever is lifted and seated in a notch 152, the arm 98 is held out of the path of the blocks 90. During manual return of the carriage, camfaces 96a on the right-hand ends of the blocks cause the arm 98 to rock idly. To prevent damage during rapid return of the carriage by means of automatic mechanism, the shaft 143 that carries the controlling-arm 160 of the carriage-returning clutch 158 is provided with an arm 142 in connection with the link 138, the arrangement causing the arm 98 to move out of the path of the blocks during automatic carriagereturn. The key-controlled column-skipping mechanism comprises a slide 244 having a slot 243 in engagement with a lug 242 on the slide 241 which, as described above, is projected by cam-mechanism on depression of the colunm-skipping key. When the slides are projected, they are out of the path of the column stops 83, but a tooth 245 on the slide 244 is in the path of a special column-stop 246 and arrests the carriage. after a free run determined by the position of that column stop. The automatic tabulating-mechanism is disabled during key-controlled column-skipping by means of a bell-crank 111, Fig. 16, which engages the arm 98 and the slot 243 in the slide 244, the arrangement causing the arm to move out of the path of the blocks 90 when the slide is projected. When the feed-rack 22 is lifted by means of the usual carriage-release lever, the arm 98 is depressed, to disable the automatic tabulating mechanism, by means of an arm 253 on a shaft 251 provided with another arm 250 arranged over the feed-rack. During automatic tabulating, the shaft 251 is automatically moved towards the left-hand to prevent the arm 253 from depressing the arm 98. For this purpose, a rock-arm 261 in the path of the feed-rack lifter 132 is arranged to rock a cam 257 which co-operates with a collar 258 on the shaft. Key locks and interlocks.-Locks are provided for preventing operation of the printing-keys during automatic carriage-return, and tabulating. The lock for the numeral keys consists of a set of balls arranged below the numeralkey levers in a housing, and adapted to be crowded by means of a rock-arm connected to a link 172, Figs. 1 and 3. The lock for the alphabetical keys consists of a rocking bail connected to the link 172 and adapted to co-operate with pivoted hooks on the alphabetkey levers. The link has a slot 171 engaging a stud 168 which is secured to an arm 169 on a shaft 170, and engages an arm 167 on the shaft 143 that controls the carriage-returning clutch. The link abuts on a lug 204 on a toke 201 which is loosely mounted on the shaft 143 and has an arm 205 loosely engaging the rod 114 of the automatic tabulating- mechanism, a spring 207 being arranged between the arm and a collar 209. During automatic carriage-return or automatic tabulating, the link 172 is displaced by means of the arm 167 or lug 204 respectively, and the printing-keys are locked. For locking the printing-keys during denominational tabulating or key-controlled column-skipping the arm 169 is rocked, to displace the link 172, bv means of an arm which is secured to the carriage-releasing shaft 127 and abuts on an arm on the shaft 170.