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As the removable plug was returned to the socket, the wires were reeled back into it. The circuit was closed either by pressing a button or removing the igniter from its socket. [4] The modern "automatic" removable automotive V-Coil lighter was developed by Casco in 1956, [6] for which it received U.S. patent 2,959,664, issued in 1960.
The adaptor was screwed into the lightbulb socket, leaving a flat face with two holes to conveniently attach the plug. The same patent had a second design, with a wall attachable receptacle, capable of receiving the same plug, thus being the first socket and plug design patented in the US.
Socket set with ratchet (above), four hex sockets and a universal joint. A socket wrench (or socket spanner) is a type of spanner (or wrench [1] in North American English) that uses a closed socket format, rather than a typical open wrench/spanner to turn a fastener, typically in the form of a nut or bolt.
A permanent match lighter with the metal 'match' leaning against the shell. A typical form of lighter is the permanent match or everlasting match, consisting of a naphtha fuel-filled metal shell and a separate threaded metal rod assembly—the "match"—serving as the striker and wick. This "metal match" is stored screwed into the fuel storage ...
The two-pin socket is an update of the bi-post design with smaller pins designed to reduce the cost of manufacture. The 1000-watt FEL medium two-pin base halogen lamp allows designers to insert the lamp into the end of the ellipsoidal reflector through a smaller hole than previously possible with conventional incandescent lamps. This improves ...
The possible range of battery voltages from 11–15 V DC must be taken into account by devices attached to the cigar lighter socket. This connector is also often used for powering accessories on motorcycles, such as heated clothing (vests, gloves, etc.) or GPS units. This makes "plugging in" easier to manage while wearing gloves.
Plug and socket connectors are usually made up of a male plug (typically pin contacts) and a female socket (typically receptacle contacts). Often, but not always, sockets are permanently fixed to a device as in a chassis connector (see above) , and plugs are attached to a cable.
Double Schuko socket with one plug inserted. The dot in the middle of the socket is a screw head, not a third hole. Illustration of the originally two Schuko plug and socket designs from the patent specification of patent DE567906 granted on 22 December 1932. The right-hand column shows the design that prevailed and is in use today.