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Let be a set and a nonempty family of subsets of ; that is, is a nonempty subset of the power set of . Then is said to have the finite intersection property if every nonempty finite subfamily has nonempty intersection; it is said to have the strong finite intersection property if that intersection is always infinite.
These connectors are available in standard (BNC size), miniature and subminiature sizes. Furthermore, connectors are offered in various solder/clamp and crimp assembly versions. Connector interface models are 2-, 3- and 4-lug bayonet as well threaded. Special pin and socket, keying and polarization are also offered.
The first types of small modular telephone connectors were created by AT&T in the mid-1960s for the plug-in handset and line cords of the Trimline telephone. [1] Driven by demand for multiple sets in residences with various lengths of cords, the Bell System introduced customer-connectable part kits and telephones, sold through PhoneCenter stores in the early 1970s. [2]
The FIP standard is based on a French initiative in 1982 to create a requirements analysis for a future field bus standard. The study led to the European Eureka initiative for a field bus standard in June 1986 that included 13 partners. The development group (réseaux locaux industriels) created the first proposal to be standardized in France.
In spite of this, several companies manufacture twist-on connectors, which they claim are designed and rated for use with aluminum conductors. [3] Specific twist-on wire connectors containing a conductive, anti-oxidant gel are registered for use on residential aluminum wiring in Canada, including when new copper wiring is connected to existing ...
Pin 1 is typically indicated on the body of the connector by a red or raised "V" mark. The corresponding wire in a ribbon cable is usually indicated by red coloration, a raised molded ridge, or markings printed onto the cable insulation. On the connector pin 2 is opposite pin 1, pin 3 is next to pin 1 along the length of the connector, and so on.
FASTON terminals or faston terminals are connectors that are widely used in electronic and electrical equipment. These terminals are manufactured by many companies, commonly using the terms "quick disconnect", "quick connect", "tab" terminals, "spade" terminals [ 1 ] or blade connectors ; without qualifiers, the first two could be mistaken for ...
This is a unique-looking barrel connector, apparently intended for providing a DC output jack (most DC jacks are used for power input).. Possibly available in multiple voltage ranges, the one for voltage classification 2 (3.15 to 6.3 V) has an outside diameter of 4.75 mm and a protruding pin of 2.5 mm diameter.