A sight for aiming a bow includes a sight assembly affixed to the bow and supporting a sight pin assembly that is illuminated. The sight pin assembly includes first and second members that are joined together by a releasable connection and one of the members supports an incandescent light bulb. The other...http://www.google.ca/patents/US4495705?utm_source=gb-gplus-sharePatent US4495705 - Illuminated sight for aiming a bow
