GB627732A - Combination selector for addressing and like machines - Google Patents

Abstract

627,732. Addressing machines. MERCER, R. (Berglind, G.). Dec. 12, 1946, No. 36765. [Class 100 (ii)] In a combination selector for addressing and like machines in which the printing operation is controlled by electrical circuits operated from impulses set up by feeling members B responding to various characteristics on printing plates or other members fed through the machine, the control circuits are arranged in separate groups comprising at least one group of make contacts and one group of break contacts. The circuits can be connected up so that both the presence of a certain signal or combination of signals, and the absence of a certain other signal or combination of signals may be made conditions to effect the machine operations. As shown in Fig. 1, A represents a printing plate 1 having signals 1p ... 3p in the form of bosses, tappets, riders or holes which open contacts in a group, 1b ... 3b, and close contacts in a group, 1s ... 3s, all connected to a switching plinth C upon which flexible connections can be made so that various circuits are set up to operate a relay control device D controlling the operations of the printing machine. The relay device D comprises a relay 10 upon whose operation activates the printing machine, a relay 8 having break contacts 9 in an operating circuit of the relay 10, and a transformer 3. Figs. 2 to 6 (not shown), illustrate circuits utilising the make contacts only for dealing 'with certain combinations of tabs. In the example of connections shown, Fig. 7, the printing operation is dependent not only on the presence of codes 3, 4, but on the absence of signals 1, 2, 5, printing taking place also if signals 1, 2, 3, 5 are present with the simultaneous absence of signal 4. Fig. 8 (not shown), gives the connections for the selection of a group of six codes by a process of excluding the unwanted codes, utilising the break contacts bk and the printing suppressing relay 8. The contacts may be actuated by mechanical, electro-mechanical, or photo-electrical devices. A modification is described using one group of break contacts and two groups of make contacts giving further permutations.