GB972060A - Indicating device for perforators - Google Patents

Abstract

972,060. Strip-perforating machines; justifyirig type. LINOTYPE G.m.b.H. Nov. 14, 1962 [Nov. 15, 1961], No. 43107/62. Heading B6W. In response to the depressing of keys representing characters or spaces in a keyboard 1, Figs. 1 and 2, or control function keys in keyboard 2, code perforations are punched in a tape 5 while a totalizer 10 is supplied with information as to the length of line composed (i.e. character matrix widths plus minimum width of spacebands), and a totalizer 16 with information as to the expansibility of the spacebands composed. The information from the totalizer 10 is passed to control apparatus 11 which compares signals received from the totalizer 10 with signals received in dependence on the position of a first indicator 13, 24 and when such signals are unequal energizes a motor 12 to drive the indicator to a position which indicates the composed line length and line remainder. A second inductor 19 is driven by a motor 18 energized by a control apparatus 17 responsive to the totalizer 16. The indicators are visible through a window 23 in the perforator. The indicator 13, 24 comprises a dark area 13 and a scale 24 divided by a reference line 31 whose distance from a datum line 12 is indicated on the scale, giving the line remainder in typographical units. The indicator 19 comprises a dark area and is bounded by a reference line 28 whose distance from the line 27 gives the expansibility. The indicator 13, 24 moves to the right and the indicator 19 to the left, and when the lines 31, 28 pass each other the line is justifiable. When the line is almost justifiable, a lamp behind the right-hand end of the window is lighted. In one form, the indicators comprise endless bands having edge perforations whereby they are driven by sprockets from the motors through worm gearing. In another form, the bands are reinforced by flexible cords and wound from a spring-loaded roller to a driven take-up roller. In another form, the indicators comprise rectangular plates with edge perforations and are driven by sprockets along straight guide means. In this form, the first indicator is modified in that the scale is stationary with the area 13 passing in front of it the scale reading in the opposite direction with respect to the first form.