A pivotal mirror adapted for use in automobiles as a rear view reflector or in medical and dental establishments and the like. Actuation of the mirror is effected by a light sensitive element employed to energize electromagnets disposed on the back face of the mirror itself as well as on a critically...http://www.google.fr/patents/US4078859?utm_source=gb-gplus-shareBrevet US4078859 - Automatic rear view mirror
