GB586016A - Improvements in and relating to telephone exchange apparatus - Google Patents

Abstract

586,016. Automatic exchange selectors. McBERTY, F. R. July 18, 1944, No. 13732. [Class 40 (iv)] The links of a 100 - line all - relay office which comprise tens and units finder and finalselector relays are mounted as shown in Fig. 1 with the finder portions to the left and the final selector portions to the right of a central frame member, units relays being mounted at 17, tens relays at 18, link terminal strips at 19 and line terminal strips at 22. The relays are of the type described in Specification 586,010, [Group XXXVII], in which, on the energization of a magnet 42, Fig. 9, a number of armatures 47 on resilient supports leave a glass back stop and are drawn into contact with contacts 48 in an insulating block. Common members are used to support the fixed contacts of a number of relays and a common supporting member may provide a part of the magnetic circuit for a group of relays. The fixed contacts of both sets of relays are connected to a barewire multiple 31 of which the wires lie in a plane close and parallel to that containing the relay contacts (and at right angles to the plane of the paper in Fig. 1). The movable contacts of the tens relays are connected, in common with those of the tens relays of other links, to bare-wire multiples 60 connected to subscribers' lines and lying in a plane at right-angles to that containing the multiple 31 (and parallel to the plane of the paper in Fig. 1). The movable contacts of the units relays are connected to a bare-wire multiple 32 in the same plane as the multiple 31 and connected to the control circuit and to the corresponding multiple of the final selector end of the links. The terminal strips for effecting these connections are arranged at the top.