Patent GB-107998-A (GB)
Title: Improvements in or relating to Apparatus for Producing Perforated Strips for Controlling Selectively-operated Machines.
IPC: B41B25/00
Filed: 1916-06-09
Abstract: 107,998. Linotype & Machinery, Ltd., (Mergenthaler Setzmaschinen - Fabrik Ges.). June 9, 1916. Strip-perforating machines; keyboards.-Comprises (1) keyboard mechanism for controlling the actuation of the punches, (2) strip-feeding mechanism, (3) devices in connexion with a line-end key, and (4) line-measuring apparatus particularly for use in the preparation of strips for controlling type-bar-making machines employing expansible spacers (i). The keys 1 each actuate one of a set of rods 5 each of which actuates one of a set of rocking plates 6 and one of a set of rocking plates 7, each plate 6, 7 being connected to a punch, and the rods being arranged between the two sets of plates. The rods 5 may be formed with lugs 10, 11 engaging plates 6, 7 respectively. The rods 5 for keys in the same bank may have their teeth 11 at the same level to actuate the same plate 7. and the rods 5 for keys in the same column may have their teeth 10 at the same level to actuate the same plate 6. The plates 6, 7 actuate rods 12, 13 connected by bell-cranks 14 to slides 15 provided with punches 16. The slides are returned by springs 18 aided, if any slides stick, by the engagement of a rocking plate 41 with shoulders 43. Relay-mechanism may be provided, that shown comprising key-rods 2 controlling cam-levers 3 which operate the rods 5. (2) The strip 17, Fig. 3, is led from a roller 19 over guide-rollers 20, 24 and sprocket-wheels 21 to a take-up roller 25. The feed-devices consist of a pawl 36 engaging a ratchet-wheel on the shaft of the sprocket-wheels, and a pawl 38 engaging a ratchet-wheel 39 connected to the take-up roller by a friction coupling which slips more or less according to the amount of strip on the take-up roller. The pawls 36, 38 are connected by links 35, 37 to a lever 34 secured to a rock shaft 33 and provided with a plate 32 engaging a projection on a special rod 5. All the ordinary rods 5 are formed with lugs 26 for rocking a plate 27 adapted, after lost motion, to lift a slide 28 having an arm 29 supporting the rod 2 which controls the cam-lever 3 of the special rod 5. At each key-operation, the lever is rocked in one direction, to retract the pawls 36, 38, by the special rod 5 and in the opposite direction, to operate the pawls, by a spring 30. The feed of the strip does not occur until the punches have been withdrawn. The lever 34 is connected by a link 44 to an arm on the shaft 42 of the rocking plate 41. (3). The key for making line-end perforations also causes the strip to be fed on for a considera,ble extent to provide a blank, so that, in the machine controlled by the strip, the line-end operations e.g. moving the assembler of a typebar-making machine, will be afforded sufficient time. The line-end key operates, through a rod 2 and a cam lever 3, a slide 55, Fig. 3, connected by a lever 56 to a pawl 57 for operating a ratchetwheel 58 on a shaft 59, a cam 60 on the shaft engaging a lever 62 which engages the rod 2. On depressing the line-end key. the ratchet-wheel is moved through one revolution owing to the lever 62 holding up the rod 2. Cams 63, 116 on the shaft 59 operate levers engaging rods 2 controlling, through cam-levers 3, rods 5 which operate the plate 27 and the line-end punches respectively. The cam 116 is timed so that the line-end perforations are made at some distance from the last of the ordinary perforations; moreover the cam 63 is arranged to arrest the feed of the strip whilst the line-end perforations are made. (4) A pointer 97, Fig. 5, is moved by each character-key 1 a distance proportional to the width of the associated type and by the space-key 82 a distance proportional to the non-expanded width of a spacer. For this purpose, the rods 5 actuate slides 67 provided with tongues 68 of graded depths arranged under a roller 69a carried bv arms on a rock-shaft 70. An arm 71 on the shaft drives, through a rod 72, a bell-crank 73 carrying a pawl 76 engaging a ratchet-wheel 78 on a shaft 77 to which the pointer is secured. To provide a fine feed, a series of stepped pawls may engage a ratchet-drum, or a wide pawl may engage stepped ratchet-wheels or a helically toothed drum. The space-key also moves a pointer 87 in the opposite direction to the pointer 97 and through a distance proportional to the justifying-capacity of a spacer. The pointer 97 is secured to a tube 82 provided with a ratchet-sector 94 driven by a pawl 93a. The rod 5 of the space-key rocks an arm 88 on a shaft 89 connected through linkage 90, 91. 93 to the pawl. The pointers 87, 97 read over scales on a dial 86. At the beginning of a line, the pointer 97 registers with the division representing the total length of the line and the scale 87 registers zero. Normally, composition is continued until the pointers coincide, but if a long word necessitates discontinuance before this stage, the deficiency is made up by quads The apparatus described in Specification 108,147 may be employed for making quad perforations. An extension 120 on the pointer 97 may indicate the linedeficit on a scale 121. The initial position of the pointer 97 is determined by the engagement of an arm 109 on the shaft 77 with an adjustable stop 110. The mechanism in connexion with the lineend key comprises a cam 98 for rocking a bellcrank 99 connected by linkage 101, 102 to an arm 103 provided with pins for releasing the pawls 76, 93<a> and associated detents. On release, the shaft 77 and the tube 83 are rotated by a weighted cord 81 and a spring 108.