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The trunnion ring came next and was 300 mm long and 107 mm thick. In front of this came an unspecified ring that was before the trunnion ring. [20] In January 1867, this design was changed by placing two rings below a thinner trunnion ring. The layers of rings of these designs were all 1.98 m long and 125 mm thick. [20]
Punchcutting is a craft used in traditional typography to cut letter punches in steel as the first stage of making metal type. [1] Steel punches in the shape of the letter would be used to stamp matrices into copper, which were locked into a mould shape to cast type. Cutting punches and casting type was the first step of traditional typesetting ...
The Iron Ring is small and understated, and was designed as a constant reminder, rather than a piece of jewelry. The Rings were originally hammered manually with a rough outer surface. The modern machined ring shares a similar design as a reminder of the manual process.
An example of the stainless steel Engineer's Ring issued by the Order of the Engineer The ring is worn on the little finger of the dominant hand.. The Engineer's Ring is a ring worn by members of the Order of the Engineer, an American fellowship of engineers who must be a certified Professional Engineer or graduated from an accredited engineering program (or be within one academic year of ...
Leitz created the lever arch file, a standing binder with a riveted lever arch mechanism (the lever can be easily opened, closed and locked) and space-saving slots into the cover, thereby introducing the modern ring binder. [4] [5] Another design for ring binders was invented in 1889 by Andreas Tengwall in Helsingborg, Sweden, and patented in ...
Titanium rings are jewelry rings or bands which have been primarily constructed from titanium. The actual compositions of titanium can vary, such as "commercial pure" (99.2% titanium) or "aircraft grade" (primarily, 90% titanium, 6% aluminum, 4% vanadium), and titanium rings are often crafted in combination with other materials, such as gemstones and traditional jewelry metals.
A pink Five Star Trapper Keeper. Trapper Keeper is a brand of loose-leaf binder created by Mead.Popular with students in the United States and parts of Latin America from the 1970s to the 1990s, it featured sliding plastic rings (instead of standard snap-closed metal binder rings), folders, and pockets to keep schoolwork and papers, and a wrap-around flap with a Velcro closure (originally a ...
Bi-metallic coins and medals have been issued for a long time. The Roman Empire issued special-occasion, large medallions with a center of bronze or copper and an outer ring of orichalcum, starting with the reign of Hadrian. Meanwhile, circulating bi-metallic coins are known from the 17th century.
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