Improvements in automatic telephone installations of the cross bar type. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in automatic telephony installations of the "crossbar" type, characterized in that, as switching elements, connecting devices are used, essentially constituted by a series of rigid metallic bars or conductors disposed parallel to each other and which are the terminals to the terminals. that the "a", "b" and "c" line wires of a group of 100 subscribers or a group of links are connected, and by a second series of flexible metallic conductors or wires that cross perpendicularly to the previous ones and that they constitute the terminals to which are connected the respective threads "a", "b" and "c" of the organs of the equipment called "connection circuits", forming both series of bars or conductors, rigid ones and flexible the others, cross, a kind of grid, making such a crossing without, normally, there is any electrical contact between one and another series of bars, to be located in different planes, is The set of rigid bars of a group of lines and that of flexible conductors of a certain number of connectors, arranged on a rectangular base or frame, of insulating material, constituting a group or frame of connectors that allows to easily establish the electrical connection between any of the connectors of the frame and any of the lines thereof; each of the subscriber or link lines of the frame comprises, in addition to the three rigid conductors already mentioned, a line electrode and a control rod governed by the armature of said electrode, so that, by attracting this its armature, forces to move to the control rod, which, in turn, drives a series of articulated rods arranged in the same row and corresponding to each of the connectors of the frame, placing said rods in a certain position that characterizes the line in question so that it can be captured by one of the connectors. Each of the connectors of the frame, apart from its three wires or flexible metal conductors tensioned by a pair of springs each, is also provided with a pair of retaining electrodes located at each end of the frame and which, when operated Together, they attract their respective armors and force them to descend to a retention bar that is also part of each connector. When descending this retention bar, it finds in its path one of the articulated rods of the row located in the capture position by the control rod corresponding to the subscriber or link in operation, and such a rod is dragged by the retention bar in its direction. descent, and as it is articulated to a small insulating block, also forces to move to said block that when descending forces in turn to move slightly to the three conductors or flexible wires of the connector, causing them to abandon their normal rectilinear shape and curving them in shape S to make them establish direct contact with the corresponding rigid conductors of the subscriber line in capture position, thus establishing the electrical connection between the line and the connector. (Machine-translation by Google Translate, not legally binding)