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A grindstone, also known as grinding stone, is a sharpening stone used for grinding or sharpening ferrous tools, used since ancient times. Tools are sharpened by the stone's abrasive qualities that remove material from the tool through friction in order to create a fine edge.
Four years later, the company officially re-introduced the Regal name [1] in Chicago, establishing their factory there. Lyon & Healy set Regal up as an independent company in 1924. During its first years of existence, Regal only marketed 4-string instruments such as ukuleles and tenor guitars. The production of 6-string guitars would begin later.
Lyon & Healy Harps, Inc. is an American musical instrument manufacturer based in Chicago, Illinois and is a subsidiary of Salvi Harps, but also has a layered corporate structure. Today best known for concert harps, the company's Chicago headquarters and manufacturing facility contains a showroom and concert hall. George W. Lyon and Patrick J ...
Mandolin awareness in the United States blossomed in the 1880s, as the instrument became part of a fad that continued into the mid-1920s. [14] [15] According to Clarence L. Partee a publisher in the BMG movement (banjo, mandolin and guitar), the first mandolin made in the United States was made in 1883 or 1884 by Joseph Bohmann, who was an established maker of violins in Chicago. [16]
The Classical Mandolin Society of America Inc., or CMSA, is a 501 (C)(3) not for profit corporation committed to promoting the playing and study of mandolin instruments in the United States. The organization was founded in 1986 by Norman Levine.
A hand-held tungsten carbide knife sharpener, with a finger guard, can be used for sharpening plain and serrated edges on pocket knives and multi-tools.. Sharpening is the process of creating or refining a blade, the edge joining two non-coplanar faces into a converging apex, thereby creating an edge of appropriate shape on a tool or implement designed for cutting.
Knife sharpening is the process of making a knife or similar tool sharp by grinding against a hard, rough surface, typically a stone, [1] or a flexible surface with hard particles, such as sandpaper. Additionally, a leather razor strop , or strop, is often used to straighten and polish an edge.
A back-up ring is a rigid ring that holds an elastomeric seal or plastic (such as Polyethylene) connection to its designed shape and in its correct place. Back up rings are commonly used with O-rings, lip seals, and as reciprocating shaft seals. They are also used for piping connections joining two different materials - typically one flexible ...