Photosensitive accelerometer utilizing radiation pressure

Claim 1

AN ACCELEROMETER COMPRISING: A HOUSING; A SUPPORT POSITIONED WITHIN SAID HOUSING; AN INERTIAL MEMBER MOUNTED ON SAID SUPPORT FOR AT LEAST ONE DEGREE OF FREE MOTION, SAID MEMBER HAVING A PREFERRED NORMAL POSITION RELATIVE TO SAID HOUSING; MEANS FOR APPLYING A REBALANCE FORCE ON SAID MEMBER TO RETURN SAID MEMBER TO SAID PREFERRED NORMAL POSITION WHEN, DUE TO EXTERNAL FORCES ON THE HOUSING, SAID MEMBER IS DISPLACED AWAY FROM SAID PREFERRED POSITION, SAID MEANS INCLUDING, AT LEAST ONE SOURCE OF RADIATION ADAPTED TO APPLY PRESSURE ON SAID MEMBER ALONG THE LINE OF FREE MOTION OF SAID MEMBER, A PICKOFF MEANS MOUNTED ON SAID HOUSING FOR DETECTING THE MOTION OF SAID MEMBER AWAY FROM SAID PREFERRED POSITION, AND ENERGIZING MEANS CONNECTED TO SAID SOURCE OF RADIATION, SAID ENERGIZING MEANS BEING ADAPTED TO RECEIVE A SIGNAL FROM SAID PICKOFF MEANS AND TO REGULATE THE AMOUNT OF RADIATION FROM SAID SOURCE IN SUCH A WAY AS TO MAINTAIN SAID MEMBER IN SAID PREFERRED NORMAL POSITION; AND RADIATION SENSING MEANS ADAPTED TO MEASURE THE AMOUNT OF RADIATION ORIGINATING FROM SAID SOURCE, SAID MEASUREMENT OF RADIATION BEING INDICATIVE OF THE ACCELERATION OF SAID HOUSING DUE TO EXTERNAL FORCES.