GB1346634A - - Google Patents

Abstract

1346634 Photographic type-composing HARRIS-INTERTYPE CORP 19 May 1971 [26 June 1970] 15888/71 Heading B6W In a photographic type-composing machine of the general construction described in Specification 1,345,967, the servomotor 44, Figs. 1 and 3, for rotating the mirror 40 is controlled by the output of a binary unit 82 which subtracts the value of the actual mirror position as represented by the output of an optical shaft encoder 85 driven by the servomotor from the desired next position as represented by the output of a space status register 70. A detector unit 88 prevents photography until the resetting of the mirror is completed. The register 70 receives information from the memory 64 of character width multiplied by a point size multiplier 65 to give actual width, and also information from a justifying computer 68 as to extra width to be added to word spaces. An input reader 62 supplies signals to the memory 64 and also character identity information to a register 63 which transfers it to a line memory 60 in two parts, one part being loaded with information while the other part controls the photographing operation. The timing and sequence of the various operations is controlled by a processing unit 95.