GB764274A - Indicating mechanism for tape perforator - Google Patents

Abstract

764,274. Type-making machines. TELETYPESETTER CORPORATION. Feb. 2, 1955 [Feb. 17, 1954], No. 3081/55. Glass 100(3) Strip-perforating machines; justifying type. Indicating mechanism for a tape-perforating device for recording signals in a tape for controlling a photographic composing machine in which either thin or thick non - expansible spacing elements can be selected is of the general construction disclosed in Specification 425,999, including a matrix pointer moving over a scale according to character width and two justification pointers, one moving the scale and the other moving over the scale, and the latter pointer is provided with a scale portion positioned adjacent the scale to afford a separate indication of the justification range when thick elements are to be selected, the first justification pointer being effective for the range of thin elements. The justification pointers 37, 38, Figs. 1 and 3, are moved through different distances to the left on depression of the space-key 30 by means of a pawl 41, ratchet segment 42, and gear segments 46. The pointer 38 is pivoted to the scale 25, which is adjustable with respect to a dial 21 and along which the matrix pointer 22 moves towards zero on depression of character keys 26, according to the width of each matrix. The pointer 37 is provided with a scale 39 having an adjustable mask 54, while the scale 25 has an adjustable mask 52. The distances 51, 53 each indicate the justification range of the photocomposing machine. If the line ends within the range 51, the line can be justifled by the use of thin spacers, while if it ends within the range 53, it can be justified by the use of thick spacers. When it is time for the operator to watch'the pointers a warning lamp is lighted under the control of contacts 56.