Anti-skid device

Claim 1

MEANS FOR SENSING A CHANGE IN ANGULAR ACCELERATION RELATIVE TO LINEAR ACCELERATION OF A ROTATING AND LINEARLY MOVING BODY, SAID MEANS COMPRISING: A FOUR-LINK PARALLELOGRAM LINKAGE INCLUDING A FIRST LINK HAVING SAID BODY RATATABLY MOUNTED THEREON AND LINEARLY MOVABLE THEREWITH, A SECOND LINK OPPOSITE SAID FIRST LINK, AND THIRD AND FOURTH LINKS PIVOTALLY JOINED TO SAID FIRST AND SECOND LINKS, MEANS OPERATIVELY ENGAGING SAID FIRST AND THIRD AND FOURTH LINKS TO BIAS SAID SECOND LINK TO NEUTRAL BALANCED TRANSLATORY POSITION, AN INERTIA MEMBER ROTATABLY MOUNTED ON SAID SECOND LINK ON AN AXIS HAVING ARCUATE TRANSLATORY MOVEMENT WITH PIVOTAL MOVEMENT OF SAID SECOND LINK ABOUT THE ROTATIONAL AXIS OF SAID BODY ON SAID FIRST LINK, A DRIVEN GEAR ON SAID BODY AND A DRIVING GEAR MESHING THEREWITH DRIVINGLY CONNECTING TO ROTATE SAID INERTIA MEMBER AT A ROTATIONAL SPEED DIRECTLY RELATED TO THE ROTATIONAL SPEED OF SAID BODY, SAID INERTIA MEMBER AND SAID DRIVEN GEAR CONSTITUTING AN ANGULAR ACCELEROMETER HAVING A POLAR MOMENT OF INERTIA AND SAID INERTIA MEMBER AND DRIVEN GEAR DRIVING GEAR AND SECOND AND THIRD AND FOURTH LINKS CONSTITUTING A LINEAR ACCELEROMETER HAVING A MASS MOMENT ABOUT THE BODY ROTATIONAL AXIS, THE RATIOS OF SAID MOMENTS BEING SUBSTANTIALLY EQUAL TO THE RATIO OF ANGULAR ACCELERATION OF SAID ANGULAR ACCELEROMETER TO THE SIMULTANEOUS LINEAR ACCELERATION OF SAID BODY TO MAINTAIN THE NORMALLY BALANCED TRANSLATORY POSITION OF SAID SECOND LINK, AND MEANS FOR CONNECTION SAID PARALLELOGRAM LINKAGE TO A SIGNAL OUTPUT MECHANISM.