Fluid pressure operated accelerometer having signal output corresponding to rate and direction of acceleration

Claim 1

AN ACCELEROMETER DEVICE FOR PRODUCING FLUID PRESSURE SIGNALS RELATED TO THE MAGNITUDE AND DIRECTION OF ACCELERATION OF THE DRIVE, SAID DEVICE COMPRISING: (A) SUPPORT MEANS, (B) AN INERTIAL MEMBER MOUNTED FOR DISPLACEMENT IN ONE DIRECTION OR THE OPPOSITE DIRECTION WITH RESPECT TO SAID SUPPORT MEANS BY INERTIAL FORCES RESULTING FROM ACCELERATION OF SAID DEVICE IN SAID OPPOSITE DIRECTION OR SAID ONE DIRECTION RESPECTIVELY. (C) PRESSURE FLUID CONDUCTING MEANS FOR CONNECTION TO A SOURCE OF PRESSURE FLUID AT A REGULATED PRESSURE AND INCLUDING FIRST AND SECOND ORIFICES CONNECTED IN SERIES SO THAT FLUID FLOW THROUGH SAID ORIFICES WILL ESTABLISH THEREBETWEEN A RESULTING SIGNAL PRESSURE RELATED TO THE RATIO OF THE AREA OF SAID ORIFICES, (D) A FIRST PRESSURE OF FORCE MEANS RESPONSIVE TO SAID REGULATED PRESSURE AND ACTING AGAINST SAID MEMBER IN SAID ONE DIRECTION, (E) A SECOND PRESSURE TO FORCE MEANS RESPONSIVE TO SAID RESULTING SIGNAL PRESSURE AND ACTING AGAINST SAID MEMBER IN SAID OPPOSITE DIRECTION TO PROVIDE A NET FORCE THEREON, (F) SAID SECOND PRESSURE TO FORCE MEANS HAVING A PRESSURE TO FORCE CONVERSION FACTOR WHICH IS GREATER THAN THAT OF SAID FIRST PRESSURE TO FORCE MEANS, WHEREBY A NET FORCE OF ZERO MAY BE PRODUCED BY A SIGNAL PRESSURE WHICH IS LESS THAN SAID REGULATED PRESSURE; AND (G) MEANS CONNECTED TO SAID MEMBER FOR VARYING THE EFFECTIVE AREA OF ONE OF SAID ORIFICES UPON DISPLACEMENT OF SAID MEMBER WHEREBY DISPLACEMENT OF SAID MEMBER IN SAID ONE DIRECTION WILL INCREASE SAID RESULTING SIGNAL PRESSURE UNTIL SAID NET FORCE BALANCES THE DISPLACING FORCE, AND DISPLACEMENT OF SAID MEMBER IN THE OPPOSITE DIRECTION WILL DECREASE SAID RESULTING SIGNAL PRESSURE UNTIL SAID NET FORCE BALANCES THE DISPLACING FORCE.