A surveillance camera system including a base plate, a truncated cone, a rotation ring spaced from the base of the truncated cone, a camera mounting assembly which readily mounts within the rotation ring, and a dome which rotates with the camera assembly and is easily engaged into position against spring-biased...http://www.google.ca/patents/US5418567?utm_source=gb-gplus-sharePatent US5418567 - Surveillance camera system
