Patent GB-191015626-A (GB)
Title: Improvements in or relating to Apparatus for Making Perforated Bands for Automatically Setting Type.
IPC: B41B25/00
Filed: 1910-06-29
Granted: 1911-04-06
Abstract: 15,626. Schnellsetzmaschinen-Ges., and Drewell, H. June 29. Strip-perforating machines; keyboards. - Relates to (1) means for actuating the punches, and (2) means for eliminating incorrect groups of holes in apparatus of the kind described in Specification 16,161/08 in which the papercarriage of the typewriter or other type-space indicator requires to be moved back to the commencement of the cancelled line or word. (1) The type-bars 90, 91, Fig. 1, of the typewriter are actuated by keys 96 and rock-shafts 94 which pass through holes in a number of sliding plates 103, Fig, 5, which select the punches. The shafts 94 have projections on opposite sides, which engage with shoulders formed in the holes in the plates so that, when a shaft is rocked, one or more plates are advanced, and the remaining plates are held back by the projections on the other side of the shaft. Each plate carries a hook 111, which normally holds down one arm of a lever 113 pivoted to the corresponding punch 114. When a plate 103 is advanced, the lever 113 is released and moves into the path of a striker-bar 118, by which the punches are actuated. The bar 118 is actuated by a cam on the main shaft 78, which, by the depression of the key, is connected for one revolution with a source of power. The punches are returned by a bar 126, and the levers 113 are re-engaged with the hooks 111 by a cam-actuated bar 120. (2) When a line is to be cancelled, the paper-carriage feed-mechanism is disengaged by the depression of the linecancelling key and the carriage is returned to initial position by a spring, a line-cancelling symbol being simultaneously perforated in the band. When a word is to be cancelled, the papercarriage is moved back to the beginning of the cancelled word. At each depression of the wordseparating key, a stop is set which limits the backward movement of the carriage to the length of the word last written. The carriage is permitted to move back by the depression of the word-cancelling key, which also perforates a word-cancelling symbol in the band. Projections 130, Fig. 5, on certain of the plates 103 release four levers 137 which are thereupon moved into the path of a striker-bar 128. The levers 137 are connected with pawls which engage four ratchet-wheels 19 having different numbers of teeth. The motions of the wheels 19 are added together by differential gear of the kind described in Specification 12,776/08, and are imparted to the paper-carriage. The carriage 2, Fig. 1, is advanced against the pull of a spring by a rack 10 and a pinion 11 on a shaft 12 which is connected with a gear-wheel 14 loose on a shaft 15, as shown in plan in Fig. 2. The shaft 15 is connected by gearing with the shaft 20 of the feed-mechanism. The wheel 14 is connected with the shaft 15 by a clutch comprising two crown-wheels 37, 38. The crown-wheel 37 is provided with spring-pressed sliding teeth, which can be withdrawn by a lever 34 to open the clutch. The wheel 14 carries a stop 39 which, at the beginning of a line, lies against a stop 40 carried by an arm 41 to which is attached a crown-wheel 42. A spring 43 tends to move the stops 40, 39 into contact, but the arm 41 is normally held stationary by the engagement of the crown-wheel 42 with a crown-wheel 45 which can slide but cannot rotate upon the shaft 15. The wheel 45 can be moved out of engagement with the wheel 42 so as to release the arm 41 by either of two levers 49, 50, the pivots of which are mounted on slides 61, 79 whereby the levers may be rendered inoperative. The end-of-line key and the line-cancelling key cause the rotation of a shaft 70 carrying cams 71, 59, which rock the levers 34, 49. The crown-wheels 37, 45 are thereby withdrawn, and the paper-carriage is returned to initial position. The depression of the word-separating key causes the slide 79, which is normally free, to be held stationary so that the crown-wheel 45 is withdrawn by the lever 50 and a cam 77. The arm 41 is thereby released, and is caused by the spring 43 to move into contact with the stop 39, after which it is again locked in position by the release of the key. The stop 40 thus remains behind the stop 39 at a distance equal to the length of the word last written. The depression of the word-cancelling key causes the rotation of the shaft 70, and releases the slide 61, so that the clutch 37, 38 is disengaged but the clutch 42, 45 remains in engagement. The paper-carriage is then moved back by its spring until the stop 39 contacts with the stop 40, i.e. to the beginning of the cancelled word. Specification 402/07 is referred to.