Patent GB-568929-A (GB)
Title: Improvements in photographic type-line composition
IPC: B41B15/08
Filed: 1943-07-23
Abstract: 568,929. Photographic type-composing. INTERTYPE, Ltd. July 23, 1943, No. 12022. Convention date, July 24, 1942. [Class 98 (i)] In a type-composing machine of the type described in Specification 496,886, the composed line of elements is moved endwise to a position for reception within the space between two abutments, embraced between the abutments by relative movement, justified while so embraced, freed from the abutments by reversal of the relative movement, and moved endwise in steps as the elements are removed successively from one end of the line to a photographing position for exposure of characters on their broad front faces, and the sensitized surface is moved in steps and in positive relation to the stepwise movement of the line as the individual elements are removed therefrom. The line-moving means and the surface-moving means are preferably positively connected upon the arrival of the composed and justified line at a stop-position prior to the first element being removed to the photographing position, the connection being released at the conclusion of the line-movement for the return of the linemoving means and the surface-moving means to their respective starting positions. As shown in Fig. 4, the element is provided with upper and lower sets of lugs D and E (all the lugs D and E on all the elements in the fount being of equal thickness) and opposed combination distributing teeth F. A piece of film B bearing a negative of a character is secured in an opening in the element at a given distance from the far broad face, and the character is recumbent and not upright. The edgewise thickness of the element (C) is equal or proportional to the setwise width of the character. A notch K is provided .in the rear vertical wall in the same position on each element. The spacebands are similar, but not provided with combination teeth, and have a two-part sliding wedge construction. As shown in Fig. 1, the elements are released from the magazine 1 on operation of keys 14a and the spacebands are released through the shoot 20 on operation of key 19. The rotating star-wheel 16 flips the elements and spacebands on to horizontal supporting rails 84a, Fig. 1c, of an assembling elevator 18. On completion of a composed line, the elevator 18 is manually raised to linedelivery position and releases the line-delivery lever 70, which is pulled by a spring to cause the line-delivery finger 80 to push the line on to rails 84 until the finger engages the projection 80b of jaw 52. The arm 85 of finger 80 simultaneously engages a latch carried by rider 86 on rack 88 to lock the finger and rack together, the rack being held by stop 114 thereon engaging a stop on vertical rod 112 and the switch 98 being closed. At the same time a further switch is held closed by a pin on a cam on the main cam-shaft 26, and through a relay and intermediate mechanism a clutch is engaged to rotate the shaft 26 through 120 degrees until a pawl on the cam causes the clutch to be disengaged. During this movement, a cam causes jaw 51 to be raised completely in front of the leading element and the jaw 52 into locking engagement with finger 80, the space between the jaw 51 and finger 80 being greater than the length of the line. A further cam raises the justifying table 64 to force the wedges of the spacebands to expand the line to the full space between jaw 51 and finger 80 to justify the line. Cams then cause the table 64 to be locked in its justifying position, the jaws 51 and 52 to be lowered out of the path of the elements and the stop on rod 112 out of contact with the stop 114, and the elevator 11 to be lowered to its element receiving position on top of housing 170. The cam groove 131 continually reciprocates the apertured feed bar 133 carrying three sets of pawls 138, 139 and 140 (Fig. 5), and when the rack 88 is released, the lever 70 pushes the leading element against face 110 and the element is carried by pawls 138 to the photographing position, where it is accurately located by a pointed member entering notch K. At the same time the film holder 92 is dropped by an amount determined by the thickness of the element removed by movement of rack 88, a safety shutter 209 is moved so that its aperture coincides with the optical axis of lens 235 and is latched in this position, the aperture in bar 133 also coinciding with the optical axis, and the shutter 210 is operated. Downward movement of bar 133 masks the aperture, and renewed upward movement raises the first element to an intermediate position and presents the second element in the exposure position. The next upward movement of bar 133 raises the first element to a position where it is pushed by pusher 148 into elevator 11. The spacebands are photographed to produce a blank space, the justifying bar 64 being extended to prevent the wedge dropping while the previous element is being removed, and are separated from the elements and returned to the top of shoot 20 in the elevator. After removal and photographing of the last element, the pointed member is not stopped by an element and the latch holding the safety shutter 209 is tripped, and shutter 209 moves to close the exposure aperture. The finger 80 is unlocked from rack 88, and the lever 70 sets in operation a delayed action switch that after three reciprocations of feed bar 133 causes the clutch to be operated to start the cam-shaft 26, which rotates through 240 degrees and returns the parts to their initial positions. The elevator 11 is raised, a slide 34 pushes the elements on to a ribbed distributer bar along which they are propelled by rotating screws 5 and from which they drop off into the appropriate channel when the proper key combination is reached. The film holder frame 252 is moved manually according to a scale for line-to-line spacing. The intensity of the light source may be varied by altering the voltage supplied by means of a switch cutting in one or other of the secondary windings of the supply transformer, and for increasing the range of enlargement or reduction, lenses of different focal length may be substituted for lens 235. The lens 235 may be adjusted longitudinally to secure within a limited range an enlarged or reduced image. The light source is provided with a reflector, and the light passes through a condenser lens. The ratio of movement of the film holder 92 relative to the advance of the line may be altered by replacing the pinion on shaft 239 engaging rack 242 by a larger or smaller pinion. Specifications 14582/90 [Class 100], and 496,927 also are referred to.