Patent GB-191104050-A (GB)
Title: Improvements in and relating to Apparatus for Perforating the Signal Controlling Tape to be used with Automatic Telegraph Transmitters.
IPC: H04L15/14
Filed: 1911-02-17
Granted: 1912-02-19
Abstract: 4050. Judd, W., Fraser, A., and Eastern Telegraph Co. Feb. 17. [Cognate Application, 19,444/11.] Selective punching-machines.-To simplify the keyboard in machines of the kind described in Specification 24,624/99, the key-levers are arranged in two sections, each of which contains a key for controlling each of the possible arrangements of one or two signal elements. The punches controlled by one section of the keyboard are next to those controlled by the other section, so that to punch a three- or fourelement signal a key is simultaneously depressed in each section. The keys in each section comprise an upper bank 8, Fig. 1, of two keys, for a dot and dash perforation respectively, and a lower bank 9 of four keys for punching the various arrangements of two signal elements. To punch a five- or sixelement signal, a two-element key in the lefthand section is operated, and the space normally left after the perforations is suppressed by means of a key 82. The rest of the signal is then punched by operating a key in each section. Each key-lever k, Fig. 4, engages a finger z pivoted upon a selector - actuating lever l, which, by means of a link u, lowers a selector j into the path of the forcing-bar 16. To prevent the accidental depression of two keys in the same section, a series of transverse plates 10 are arranged beneath the levers l. Each plate 10, Fig. 8, has a notch 14 under each of the levers l, one notch in each plate having an inclined side, so that, on the depression of a lever l, the corresponding plate 10 moves laterally and prevents the depression of a second lever. The selectors j have teeth 19 which engage pegs 27 on rock-shafts 20 when the forcing-bar 16 is operated, and the shafts 20 have at their ends crank-arms 21, Fig. 3, which operate levers 23, 24 and thrust-bars 25, which operate the punches. These are mounted in frames, as described in Specification 24,624/99. Each lever l, Fig. 4, has a spring- controlled finger 1 which engages beneath a locking-frame 4 when the lever is depressed. until after the forcing-bar is operated. A toothed link 28, Fig. 5, on the forcing-bar 16 has a step 29, which engages an arm 30 on the frame 4 on its return, and releases the fingers 1. At the end of the stroke, the inclined end of the link 28 engages a roller 32 and releases the arm 30 and the frame 4. The driving- mechanism is brought into operation on the rise of a key which has been depressed. Beneath the key-levers is a rock-shaft 35, Figs. 3 and 4, which has a rocking frame 37, and an arm 38 pivoted upon a catch-bar 39, Fig. 3. On pressing a key, the frame 37 is rocked and the bar 39 moves to the left, a tooth 51 thereon engaging a pin on an arm on the shaft 47, which also has an arm 45, a pin on which engages the tail of a pawl 42 pivoted on a camsleeve 41 on the power-shaft 40. On the keylever rising, the rocking frame 37 rises, and, bv the movement of the parts 39, 51, 47, 45, the pawl 42 is released and engages a ratchetwheel on the shaft 40. The cam-sleeve 41 is thus rotated for a single revolution, after which the pawl 42 is re-engaged. The sleeve 41 has a cam which engages a lever 116<Î> and rocks the forcing-bar about its pivots 17, thus operating some of the thrust-bars 25. The extent of the feed is controlled by depending fingers 72, which are engaged by the bars 25 and moved out of the path of a pivoted stepped part 70. The second finger 72 has a projection 126, Fig. 11, which moves the first finger when the second is moved. The part 70 is connected by a link 69 and an arm 67 to a pawlplate 62, which effects the feed, the extent of the feed being determined by the extent to which the fingers 72 allow the part 70 to be retracted by a spring. The pawl-plate 62 is operated from a cam 58 on the sleeve 41, by means of a lever 60 and a link 61, and drives the feed-wheel 75 by means of a ratchet-wheel &c. A second arm 68 connected with the pawlplate is controlled directly by the spacesuppressing key 82, Fig. 1, which inserts a stop 73, Fig. 5, into the path of the arm 68, and so limits the feed to the length of two feed - perforations. To release a wronglydepressed selector, before the wrong key has been allowed to rise, a correcting-key 93, Figs. 1 and 4, is operated. This is connected with a rock-shaft 96 arranged to lower a verticallysliding member 103, Fig. 5, the pin 106 of which engages a pin 108 and turns the rocking frame 4 to release the finger 1 of a selectoractuating lever l. A pin 107 on the member 103 engages the catch-bar 39, Fig. 3, and releases its tooth 51 from the tripping-device. The stop 73 is also released, if it has been operated. A modification shown in Fig. 12 is adapted for the Wheatstone system, in which a two-element signal may have a length of two, three, or four feed-perforations. In order that the perforations effected by the keys of the two sections may be adjacent, each key of the righthand section controls three selectors j, j<1>, j<2>, by means of which the same perforations may be punched in three different positions, while the keys of the other section operate three transverse controlling-plates 127, 128, 129. Each of these plates has a series of notches, which come under corresponding selectors, or extensions 133 on the selectors, and determine which of three selectors will be operated by a key in the righthand section. The space - suppressing key 82 controls three stops 150 &c., Fig. 19, normally retained by spring detents 115. The stops are provided with hooked links 163, each of which engages one of the controlling-plates, and also with fingers 91<Î>, which normally engage a finger 92<Î> on the shaft 86, which is actuated by the key 82. The movement of a plate 127 by one of the left-hand keys releases one of the links 163 &c., and allows one of the fingers 91x to be operated if the space-suppressing key 82 is depressed. The finger 91<Î> then controls the feed by limiting the movement of the arm 68. If the correcting-key 93 is depressed, the spring detents 115 are released by an arm 110<Î>. In a modification, Fig. 22, the three movable stops are replaced by a stop-lever 152x with three steps at its lower end, which is controlled by a pivoted catch-plate 200 engaged by the hooked ends of the controlling-plates 127<Î>. A stepped detent 115<Î> engages the lever 152<Î>.