TELESPECTION

SYSTEM FOR INSPECTING A CONDUIT SUCH AS A SEWER LINE AND THE LIKE-NAMELY, TELEVISION CAMERAS, TELEVISION MONITORS, ELECTRICAL TELEVISION CABLES, ELECTRICAL SYSTEM CONTROLS, MEANS FOR TRANSPORTING TELEVISION CAMERAS THROUGH A SEWER LINE, APPARATUS FOR MEASURING THE DISTANCE TO A TELEVISION CAMERA IN A SEWER LINE, AND CAMERAS FOR PHOTOGRAPHING THE PICTURE ON TELEVISION MONITORS