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Belt grinding is an abrasive machining process used on metals and other materials. It is typically used as a finishing process in industry. A belt, coated in abrasive material, is run over the surface to be processed in order to remove material or produce the desired finish.
Ram's Horn pattern of tablet weaving. Some patterns require that weavers thread each card individually. Others allow "continuous warping", which puts the threads through the holes of an entire deck – the four threads in the deck of cards are wrapped around two stationary objects, dropping one card each time around the fixed points.
A bench grinder is a benchtop type of grinding machine used to drive abrasive wheels. A pedestal grinder is a similar or larger version of grinder that is mounted on a pedestal, which may be bolted to the floor or may sit on rubber feet. These types of grinders are commonly used to hand grind various cutting tools and perform other rough ...
Organ-grinder in Vienna, Austria. A street organ (French: orgue de rue or orgue de barbarie) played by an organ grinder is a French automatic mechanical pneumatic organ designed to be mobile enough to play its music in the street. The two most commonly seen types are the smaller German and the larger Dutch street organ.
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The surface grinder is composed of an abrasive wheel, a workholding device known as a chuck, either electromagnetic or vacuum, and a reciprocating table. Grinding is commonly used on cast iron and various types of steel. These materials lend themselves to grinding because they can be held by the magnetic chuck commonly used on grinding machines ...
Many of the horizontal slot-handled quern-stones have decoration that usually follows the basic pattern of motifs that encircle the hopper and/or the handle slot. One type though has an irregular pattern of cup marks that encircle the hopper. [1] A quern was discovered at Dunadd in Scotland that has a cross carved into the upper stone.
Palmgren was born in Överluleå socken, Sweden, in 1783, to farmer Olof Persson. He took over his father's farm in Svartbyn at the age of seventeen. In 1803, he married Brita Stina Pehrsdotter. The Pietist New Reader movement came to Piteå around 1810 through one of Palmgren's relatives, who had read Herrnhuter (Moravian Church) David Hollatz ...