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A time switch (also called a timer switch, or simply timer) is a device that operates an electric switch controlled by a timer. Intermatic introduced its first time switch in 1945, which was used for "electric signs, store window lighting, apartment hall lights, stokers, and oil and gas burners." A consumer version was added in 1952.
English: Clocking diagram (with appropriate colors) for the IEC 60309-2 low-voltage (<50V) connector. The clock hour refers to the position of the protective earth/ground pin, with the connector key referencing 6h.
Clock diagram for the regular (>50 V) connector series, viewed looking in to the socket end. The extra-low voltage connector also supports keying, although in this case the angle is the position of the minor key, assuming the major key is at the 6h position (180°).
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Intermatic Incorporated is an American manufacturer of time switches headquartered in Spring Grove, Illinois. Intermatic was founded in 1891 in Chicago, Illinois as the International Register Company to produce fare registers .
Wire crossover symbols for circuit diagrams. The CAD symbol for insulated crossing wires is the same as the older, non-CAD symbol for non-insulated crossing wires. To avoid confusion, the wire "jump" (semi-circle) symbol for insulated wires in non-CAD schematics is recommended (as opposed to using the CAD-style symbol for no connection), so as to avoid confusion with the original, older style ...
An automotive wiring diagram, showing useful information such as crimp connection locations and wire colors. These details may not be so easily found on a more schematic drawing. A wiring diagram is a simplified conventional pictorial representation of an electrical circuit. It shows the components of the circuit as simplified shapes, and the ...
octal divide-by-2 clock driver, 2 outputs inverted 16 SN74AS303: 74x304 1 octal divide-by-2 clock driver 16 SN74AS304: 74x305 1 octal divide-by-2 clock driver, 4 outputs inverted 16 SN74AS305: 74x306 1 8-bit LV-TTL to GTL+ bus transceiver three-state and open-collector (24) SN74GTLPH306: 74x309 1 1024-bit RAM (1024x1) open-collector 16 SN74S309 ...