Glass wall-thickness gauging machine

Claim 1

APPARATUS FOR TESTING THE WALL THICKNESS OF A HOLLOW GLASS ARTICLE, SAID APPARATUS COMPRISING A CARRIAGE MOUNTED FOR VERTICAL MOVEMENT, A PAD ROTATABLY MOUNTED ON THE CARRIAGE AND FORMING A CARRIER FOR THE ARTICLE. MEANS FOR LIFTING AND LOWERING THE CARRIAGE AND THEREBY MOVING THE CARRIER AND THE ARTICLE THEREON UP AND DOWN, A LAMP POSITIONED ABOVE THE SAID PAD, A STATIONARY SUPPORT IN WHICH THE LAMP IS MOUNTED, A VERTICALLY DISPOSED LIGHT TUBE MOUNTED ON SAID SUPPORT AND PROJECTING DOWNWARDLY IN POSITION TO RECEIVE A BEAM OF LIGHT FROM THE LAMP AND TRASMIT IT DOWNWARDLY INTO THE ARTICLE UNDER TEST, A REFLECTOR CARRIED BY SAID TUBE IN POSITION TO REFLECT THE LIGHT BEAM LATERALLY AGAINST THE SIDE WALL OF THE ARTICLE AND THEREBY CAUSING A PORTION OF THE LIGHT TO BE TRANSMITTED THROUGH SAID WALL, MEANS FOR MOVING THE CARRIAGE UP AND DOWN, MEANS FOR CONCURRENTLY ROTATING SAID PAD AND THE ARTICLE THEREON AND THEREBY CAUSING THE LIGHT BEAM TO SCAN THE SIDE WALLS OF THE ARTICLE, AND A PHOTOELECTRIC TUBE IN THE PATH OF THE TRANSMITTED LIGHT BEAM.