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The magic lantern, also known by its Latin name lanterna magica, was an early type of image projector that used pictures—paintings, prints, or photographs—on transparent plates (usually made of glass), one or more lenses, and a light source.
An adaptor (in the context of plugs and sockets) is defined in IEC 60050 as "a portable accessory constructed as an integral unit incorporating both a plug portion and one or more socket-outlet portions". (There is an alternative spelling, 'adapter', but adaptor is the form usually used in standards and official documents.)
Chimney starters essentially work by increasing the draft, supplying more oxygen to the coals. Taller starters are more effective than shorter ones. In empirical studies of lighting cones for Haitian charcoal stoves (which are placed over a grate rather than having an integrated grate), the ignition time and charcoal consumption were halved compared to lighting on a shallow bed grate, and ...
A chimney cowl or wind directional cap is a helmet-shaped chimney cap that rotates to align with the wind and prevent a downdraft of smoke and wind down the chimney. An H-style cap is a chimney top constructed from chimney pipes shaped like the letter H. It is an age-old method of regulating draft in situations where prevailing winds or ...
Figures 2 and 4 of this patent show an adaptor plugged into what appears to be a "Chapman" receptacle. [3] Hubbell evidently soon found the round pin design unsatisfactory as a subsequent U.S. patent 774,251 filed on May 27, 1904 shows lampholder adaptors similar to those of his first patent for use with plugs having coplanar (tandem) flat pins.
Cheater plugs were previously available with a short flexible grounding wire rather than a flat metal screw tab. This allowed use of the lower receptacle in a duplex outlet, which does not have a faceplate screw in the correct location for the screw tab. The grounding wire would be diverted around the adapter to reach the faceplate screw above it.
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