Claims:1. A clamshell hinge, comprising:
a first variable diameter member disposed concentrically about a first shaft having a first axis of rotation;
a second variable diameter member disposed concentrically about a second shaft having a second axis of rotation, the second axis of rotation parallel to the first axis of rotation;
a fixed length member slideably disposed about at least a portion of a perimeter of the first variable diameter member and slideably disposed about at least a portion of a perimeter of the second variable diameter member
wherein, responsive to a rotation of the first shaft through a first arc in a first direction, the first variable diameter member increases in diameter reducing the distance between the first shaft and the second shaft; and
wherein, responsive to a rotation of the first shaft through the first arc in a second direction opposite the first direction, the first variable diameter member decreases in diameter increasing the distance between the first shaft and the second shaft. , Description:TECHNICAL FIELD
The present disclosure relates to hinge systems used with clamshell electronic devices.

BACKGROUND
Clamshell electronic device housings typically include a first device housing and a second device housing that are pivotably coupled using one or more hinges and configured such
that the device may be opened and closed in a manner very similar to a book or magazine.
Traditionally, the hinge permitted the rotation of the first device housing through an arc
measured with respect to the second device housing. The hinge maintained a fixed spacing between the device housings regardless of the angle at which the first device housing was
positioned with respect to the second device housing. In fact, device designers frequently take
advantage of the gap that exists between the device housings and position ventilation features
(slots, etc.) along the edge of the device housing proximate the hinge.