Spiral scanning system employing rotary and reciprocating mirrors for automatic data measuring projectors

Claim 1

APPARATUS FOR USE IN CONJUNCTION WITH A COMPUTER IN SCANNING AND MEASURING THE PARTICLE TRACK OF SINGLEVERTEX TYPE NUCLEAR EVENTS IN FILMED BUBBLE CHAMBER DATA COMPRISINGG, IN COMBINATION, A FILM PROJECTOR FOR PROJECTING AN IMAGE WHICH CONTAINS THE SINGLE-VERTEX EVENT TRACK TO BE MEASURED, A SCANNING PERISCOPE DISPOSED TO VIEW SAID IMAGE, SAID SCANNING PERISCOPE HAVING A ROTATING IMAGE VIEWING ELEMENTT COMPRISING A FIRST MIRROR VIEWING SAID IMAGE AND BEING PROVIDED WITH A SECOND MIRROR FOR VIEWING THE REFLECTED IMAGE FROM SAID FIRST MIRROR, MEANS FOR TRANSLATING ONE OF SAID FIRST AND SECOND MIRRORS OF SAID PERISCOPE WITH RESPECT TO THE OTHER ALONG THE NATURAL OPTICAL AXIS THEREOF WHEREBY SAID PERISCOPE TRACES A PATH ACROSS A RADIAL PORTION OF SAID IMAGE FOR TRACING A SPIRAL SCANNING PATH CENTERED ON SAID SINGLE-VERTEX EVENT ON SAID IMAGE, POSITION INDICATING MEANS RESPONSIVE TO THE INSTANTANEOUS POSITION OF SAID PERISCOPE ALONG SAID SPIRAL SCANNING PATH, A PHOTOELECTRIC ELEMENT DISPOSED TO RECEIVE THE LIGHT FROM SAID IMAGE WHICH IS TRANSMITTED FROM SAID SECOND MIRROR AND PRODUCING AN OUTPUT INDICATIVE OF MOMENTARY CHANGES IN LIGHT INTENSITY DUE TO THE PRESENCE OF AN INCREMENT OF EVENT TRACK IN SAID IMAGE, AND AN INFORMATION REGISTER FOR RECEIVING DATA FROM SAID POSITION INDICATING MEANS AND FORM FROM SAID PHOTOELECTRIC ELEMENT FOR SUBSEQUENT ANALYSIS BY SAID COMPUTER.