A camera module for use in a surveillance camera system is provided. The camera module includes a housing and a pan-and-tilt mechanism that is mounted to the housing. The pan-and-tilt mechanism includes a pan motor for panning a camera and a tilt motor for tilting the camera. The pan motor is mounted...http://www.google.fr/patents/US5627616?utm_source=gb-gplus-shareBrevet US5627616 - Surveillance camera system
