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Betty James died of congestive heart failure in November 2008, age 90, after having served as president of James Industries from 1960 to 1998.
In 1943, Richard James, a naval mechanical engineer stationed at the William Cramp and Sons shipyards in Philadelphia, was developing springs that could support and stabilize sensitive instruments aboard ships in rough seas.
The toy was packaged in a black-lettered box, and advertising saturated America.
James often appeared on television shows to promote Slinky. Other Slinky toys introduced in the 1950s included the Slinky train Loco, the Slinky worm Suzie, and the Slinky Crazy Eyes, a pair of glasses that uses Slinkys over the eyeholes attached to plastic eyeballs. Betty James managed the company, juggled creditors, and in 1964 moved the company to Hollidaysburg, Pennsylvania. The company and its product line expanded under Betty James’s leadership.
In the state of equilibrium of a slinky, all net force is cancelled throughout the entire slinky.
This results in a stationary slinky with zero velocity.