A differential capacitive sensor (50) includes a movable element (56) pivotable about a rotational axis (60). The movable element (56) includes first and second sections (94, 96). The first section (94) has an extended portion (98) distal from the rotational axis (60). A static layer (52) is spaced away...http://www.google.com.au/patents/US7610809?utm_source=gb-gplus-sharePatent US7610809 - Differential capacitive sensor and method of making same
