Search results
Results from the WOW.Com Content Network
Later in 1904, he changed the design to flat blades (a design later incorporated in the NEMA 2 series), filled under the U.S. patent 774,251 Both these patents were granted in November 1904. In 1910, Hubbel worked on improving his popular flat blade design, filled U.S. patent 1,064,833 in 1912.
Harvey Hubbell II (born 1857, Connecticut) was an American inventor, entrepreneur, and industrialist. His best-known inventions are the U.S. electrical plug [ 1 ] and the pull-chain light socket . [ 2 ]
And while Hubbell was busy on land, the company found new opportunities at sea. In 1952, the ocean liner "SS United States" was launched in Newport News, Virginia. Queen of the seas for many years, the ship was completely fitted with Hubbell wiring devices designed expressly for narrow stateroom partitions and to withstand the effects of salt air.
The type 15 plug and socket has 3 round pins of 4 mm diameter, plus 2 flat pins (for L2 and L3). It is designed for three phase applications and is rated at 10 A, 250 V/440 V. The socket will also accept types 11 and 12 plugs, and the Europlug. The type 25 plug and socket has 3 rectangular pins, 4 mm x 5 mm, plus 2 flat pins (for L2 and L3).
[4] [citation needed] This direct routing method has the advantage of reduced cost by allowing use of the shortest possible lengths of wire, but the major disadvantage is that a detailed building wiring diagram is needed for other electricians to understand multiple interwoven circuits, especially if the wiring is not fully visible throughout ...
Equipment rooms house equipment and wiring consolidation points that serve the users inside the building or campus. Backbone cabling is the inter-building and intra-building cable connections in structured cabling between entrance facilities, equipment rooms and telecommunications closets.
Hubbell's first design was a socket which screwed into a lampholder (like the early lampholder plugs), but with a separable plug with pins (U.S. patent 774,250) or blades (US patent 774251). The 1906 Hubbell catalog [4] shows the blade plug with a flush mounting socket for use in wall or floor. Other manufacturers adopted the Hubbell pattern ...
Cooper Wiring Devices is a division of Cooper Industries and provides a range of residential, institutional and industrial grade electrical devices and wiring for consumers and building contractors. The company is the successor to both Arrow-Hart & Hegeman and Eagle Electric, both of which Cooper Industries had acquired. The Arrow-Hart brand is ...