Optical alignment system

Claim 1

AN OPTICAL SYSTEM FOR DETERMINING WHETHER FIRST AND SECOND OBJECTS ARE IN A PREDETERMINED ALIGNMENT; THE FIRST OBJECT HAVING A REFERENCE AXIS WHICH IS TO BE AIMED AT A PREDETERMINED ANGLE FROM THE LINE OF SIGHT BETWEEN THE FIRST AND SECOND OBJECTS, SUPPORT MEANS BEING MOVABLE INDEPENDENTLY OF SAID OBJECTS AND ENGAGEABLE WITH A PERSON''S HEAD, A BEAM SPLITTER MOUNTED UPON THE SUPPORT MEANS IN FRONT OF THE PERSON''S SIGHTING EYE, A RETICLE AND A LIGHT SOURCE MOUNTED UPON THE SUPPORT MEANS SO THAT AN IMAGE OF THE RECTICLE IMPINGES UPON THE BEAM SPLITTER AND IS REFLECTED FORWARDLY THEREBY, THE RETICLE AND THE BEAM SPLITTER BEING POSITIONED RELATIVE TO THE SIGHTING EYE SO THAT ANY POINT ON THE BEAM SPLITTER IS EQUIDISTANT FROM THE RETICLE AND THE SIGHTING EYE, A TRANSPARENT COMBINING GLASS MOUNTED UPON THE FIRST OBJECT AND HAVING A FLAT REFLECTIVE SURFACE DISPOSED SO THAT A LINE NORMAL THERETO EXTENDS AT SAID PREDETERMINED ANGLE WITH RESPECT TO THE REFERENCE AXIS, SAID COMBINING GLASS BEING DISPOSED IN THE PERSON''S LINE OF SIGHT FOR REFLECTING AN EFFECTIVELY COLLIMATED IMAGE OF THE RETICLE INTO THE PERSON''S SIGHTING EYE WHEN THE LINE OF SIGHT ISE PERPENDICULAR TO THE SURFACE OF THE COMBINING GLASS WHEREBY THE REFLECTED IMAGE OF THE RETICLE INTERCEPTS THE SIGNTING EYE AND THE LINE OF SIGHT THROUGH SAID COMBINING GLASS SIMULTANEOUSLY INTERCEPTS THE SECOND OBJECT WHEN THE FIRST AND SECOND OBJECTS ARE IN THE PREDETERMINED ALIGNMENT.