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Iron hands are metal prostheses for hands and upper extremities from the middle ages and early modern period. These designs combined cosmetic and functional properties. The most famous example of an iron hand was made around the year 1530, being the second prosthetic hand made for the German knight Götz von Berlichingen.Quasigroch, Günter: ''Die Handprothesen des fränkischen Reichsritters Götz von Berlichingen. 2. Fortsetzung: Die Zweithand.'' In: ''Waffen- und Kostümkunde.'' Vol. 25, 1983, pp. 103–120.
Most iron hands are based on the same constructive principles, although there are considerable differences in complexity. Fingers can be flexed passively (for example using the healthy hand) and are locked in place by a
Iron hands are metal prostheses for hands and upper extremities from the middle ages and early modern period. These designs combined cosmetic and functional properties. The most famous example of an iron hand was made around the year 1530, being the second prosthetic hand made for the German knight Götz von Berlichingen.Quasigroch, Günter: ''Die Handprothesen des fränkischen Reichsritters Götz von Berlichingen. 2. Fortsetzung: Die Zweithand.'' In: ''Waffen- und Kostümkunde.'' Vol. 25, 1983, pp. 103–120.
Most iron hands are based on the same constructive principles, although there are considerable differences in complexity. Fingers can be flexed passively (for example using the healthy hand) and are locked in place by a ratchet
Ratchet may refer to:
Devices
* Ratchet (device), a mechanical device that allows movement in only one direction
* Ratchet, metonomic name for a socket wrench incorporating a ratcheting device
* Ratchet (instrument), a music instrument and a ...
mechanism, similar to those of contemporary flintlocks. Extension
Extension, extend or extended may refer to:
Mathematics
Logic or set theory
* Axiom of extensionality
* Extensible cardinal
* Extension (model theory)
* Extension (predicate logic), the set of tuples of values that satisfy the predicate
* E ...
of the fingers works by spring
Spring(s) may refer to:
Common uses
* Spring (season), a season of the year
* Spring (device), a mechanical device that stores energy
* Spring (hydrology), a natural source of water
* Spring (mathematics), a geometric surface in the shape of a ...
pressure.
Bibliography
* Löffler, Liebhard: ''Der Ersatz für die obere Extremität: die Entwicklung von den ersten Zeugnissen bis heute.'' Stuttgart: Enke 1984, . * Putti, Vittorio: ''Historical Prostheses.'' In: '' Journal of Hand Surgery.'' Vol. 30, No. 3, Edinburgh: 2005, pp. 310–325.References
{{Commonscat, Iron Hand (prosthesis) Prosthetics History of mechanical engineering