Histórico do passo nº 21 do guia Microsoft Surface Book Teardown

Alterações no passo nº 21

Edição por Andrew Optimus Goldheart — 2 de nov de 2015

-	[* black] Hinge mechanism, Andrew will write about how it works
+	[* black] The Surface Book features a "Muscle Wire Lock," that will keep your display securely fastened to the base, until it's time to undock and get more mobile.
+	[* icon_note] Muscle wire is one of many names for [https://en.wikipedia.org/wiki/Shape-memory_alloy\|shape-memory alloy\|new_window=true], a class of materials that can undergo deformation, and then return to a prior shape when heated.
+	[* black] In this case, electricity is run through the wire, heating it up and causing it to contract. This pulls the black pulley inward, against the spring, lifting the lower arm of the linkage.
+	[* black] That lower arm holds a very tiny rod captive. The rod serves as the grip, that holds onto the base unit's metal tab. When the linkage is retracted, the rod rolls out of the way and lets the base go.