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Another term is 'concertina' doors, inspired by the musical instrument of the same name. Folding doors can be used as internal or external room dividers and are made from a variety of materials. Most folding doors are glazed and the panels have frames of either wood, aluminium or upvc. They can open up and fold either internally or externally ...
A Chemnitzer concertina is a musical instrument of the hand-held bellows-driven free-reed category, sometimes called squeezeboxes. The Chemnitzer concertina is most closely related to the bandoneón ( German spelling: Bandonion ), and more distantly, to the other types of concertinas and accordions .
There was what might be called a concertina craze on: innumerable coils of barbed wire were converted into concertinas by the simple process of winding them round and round seven upright stakes in the ground; every new lap of wire was fastened to the one below it at every other stake by a twist of plain wire; the result, when you came to the ...
A concertina is a free-reed musical instrument, like the various accordions and the harmonica. It consists of expanding and contracting bellows, with buttons (or keys) usually on both ends, unlike accordion buttons, which are on the front. The concertina was developed independently in both England and Germany. [1]
The Carlsfelder concertina (German: Carlsfelder konzertina) is a member of the German concertina family developed by Carl F. Zimmerman, based on the earlier Chemnitzer concertina of Carl Friedrich Uhlig.
In the English Folk Revival of the 1960s, though the English concertina had been more an art music instrument, it became popular with British folk musicians. Karl Dallas has suggested that the mere presence of 'English' in the name attracted some of the revival's demographic; [6] however the instrument's versatility and portability were also important as factors in the instrument's adoption. [7]
Hörmann is a German manufacturer of doors, garages, door frames, and gates for commercial and private real estate. [1] Operating globally, the family-owned business is Germany's largest door producer and the fourth biggest door manufacturer in the world.
Concertina movement is the method by which a snake or other organism anchors itself with sections of itself and pulls or pushes with other sections to move in the direction it wants to go. To spring forward a snake may require a rough surface to thrust back against. [1] [2] It is named after the concertina musical instrument. [citation needed]