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In 1932 the Packard brothers, in order to deal with failing sales and the great depression, sold Packard Electric Company to General Motors who named it the Packard Electric Division.
Prior to that time, Packard Motor Car Company was a automotive wiring company founded by William Doud Packard and his brother James Ward Packard in 1890. One of the Packard Electric Company's subsidiaries was the New York and Ohio Company, which produced the first Packard Motor Car in 1899 in Warren, Ohio.
The electrical connectors developed by Packard were used extensively by General Motors in its automobiles. The first series of connectors was the Packard 56 (In 1956) , followed by the Weather Pack in 1970's, and finally the Metri Pack, which are still in common use today.
The Packard 56 is the grandfather of the modular electrical connector, the terminals fold over the conductor to form a high-pressure crimp that seals the conductor strands as a soldered joint does yet achieves a superior electrical connection than solder can. The terminals also alleviate strain on the exposed conductor with a secondary crimp that grabs the wire jacket. All 56-series connectors use 1/4-inch blade-type terminals that can handle as much as 48 amps continuously.