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Use your screwdriver and loosen the two screws holding the female plugcap closed. Then, pry the female plug cap open to reveal the wire terminals. You should notice a green terminal, a silver terminal and a copper terminal. Use the screwdriver to loosen each screw on the terminals. Step 6 The report of the court proceedings includes a comprehensive review of the development of the art in the US prior to 1919, based on evidence presented to the Court. Separable plugs had been available for more than a decade prior to Hubbell’s 1904 design. Electricity was the new thing and it generated an increased transnational flow of ideas and products. The International Electrotechnical Commission (IEC) was founded in 1906 to provide a platform to scientists so that they could build on each other’s research and stimulate the development and commercialization of electrical technology and machinery. Once you are finished, plug the male end into a powered outlet and test the female end with a voltage tester. If the tester reads 120 volts, then you are good to go!
WARNING!Improper or incorrect wiring of an electrical device can cause bodily harm, and death.We recommend that you consult with a licensed electrician who is familiar with wiring. Following the lead set by the lamp manufacturers in standardizing lamp bases, a conference of the plug and receptacle manufacturers, including Hubbell, was arranged with a view to agreeing a standard configuration. It was a time of great expansion in the use of electrical appliances such as fans, heaters, and cookers, as well as portable devices such as hair curlers and irons, and the public wanted interchangeability.
Next, using wire strippers to strip about half an inch of insulation from each of the exposed wires in the wire. Step 7 Despite Hubbel’s objections, other manufacturers adopted the Hubbell pattern, omitting Hubbell’s detents, and by 1915 the use of Hubbell’s configuration was widespread. In 1919 Hubbell unsuccessfully attempted to get an injunction to prevent other manufacturers from making receptacles and plugs to the dimensions used by Hubbell. In 1912 Hubbell rotated his tandem pins by 90 degrees to arrive at the parallel flat pin configuration still widely used today. Hubbell evidently soon found the round pin design unsatisfactory as a subsequent patent filed on May 27, 1904 shows lampholder adaptors similar to those of his first patent for use with plugs having tandem flat pins.
By 1915, Hubbell had sold about 13 million receptacles and plug bases/caps with tandem slots/pins, and about 1.25 million with parallel slots/pins, most of which were then still in active use, meaning that Hubbell’s configurations were by far the most widely used. In 1904 at the World’s Fair in St. Louis scientists and engineers from around the world realized for the first time that standards for electrotechnology were urgently needed.For decades, the International Electrotechnical Commission (IEC) tried to develop a universal domestic power plug, but time and again political and economic issues threw a spanner in the works. In 1986, the IEC finally presented the universal standard plug (type N) to the world, but unfortunately the initial enthusiasm had dampened. In Britain, a 1911 book dealing with the electrical products of A. P. Lundberg & Sons of London describes the “Tripin” earthed plug available in 2.5 amp and 5 amp models. The pin configuration of the “Tripin” appears virtually identical to modern BS 546 plugs. Hubbell had introduced its own parallel flat pin configuration in 1912. In 1915 there were from 15 to 20 different types of blades and from 15 to 30 different types of receptacles. The line of each was not interchangeable with competing lines. The earliest American patent application for an earthed plug appears to be 11 January 1915 by George P. Knapp, on behalf of the Harvey Hubbell company.
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