Speed governors

Claim 1

A CENTRIFUGAL SPEED GOVERNOR COMPRISING A MEMBER ROTATABLE ABOUT AN AXIS; A FIRST SURFACE MEMBER AND A SECOND SURFACE MEMBER WHICH ARE INCLINED RELATIVELY TOWARD EACH OTHER IN DIRECTIONS TRANSVERSE TO THE SAID AXIS SO THAT THE SAID SURFACE MEMBERS ARE PROGRESSIVELY CLOSER TO EACH OTHER AS THEY PROGRESSIVELY EXTEND IN THE DIRECTION AWAY FROM THE AXIS OF THE ROTATABLE MEMBER; BIASING MEANS FOR BIASING THE FIRST AND SECOND SURFACE MEMBERS TOWARD EACH OTHER; A GENERALLY CHANNEL-SHAPED MEMBER WITH ITS CHANNEL EXTENDING IN A DIRECTION TRANSVERSE TO THE SAID AXIS AND SUPPORTED FROM THE ROTATABLE MEMBER FOR ROTATION THEREWITH AND HAVING TWO OPPOSED WALLS EACH FORMED WITH A SLOT, WHICH SLOT EXTENDS PARALLEL TO THE SAID FIRST SURFACE; A WEIGHT ASSEMBLY COMPRISING A SPINDLE CARRYING A FIRST ROLLER AND A SECOND ROLLER, THE SPINDLE PASSING THROUGH AND BEING GUIDED BY THE SAID SLOT, THE FIRST ROLLER BEING POSITIONED BETWEEN THE SAID WALLS OF THE CHANNELSHAPED MEMBER AND ENGAGING THE SAID FIRST SURFACE, AND THE SECOND ROLLER COMPRISING TWO ROLLER PARTS ONE TOWARD EACH END OF THE SPINDLE AND EACH ROLLER PART SEPARATED AXIALLY OF THE SPINDLE FROM THE FIRST ROLLER BY ONE OF THE SAID WALLS, THE ROLLER PARTS ENGAGING THE SAID SECOND SURFACE AT SPACED POSITIONS, THE ARRANGEMENT BEING SUCH THAT AS THE WEIGHT ASSEMBLY MOVES, UNDER CENTRIFUGAL FORCE, OUTWARD FROM THE ROTATABLE MEMBER AS IT IS ROTATED, THE ROLLERS ROLL ALONG THEIR RESPECTIVE SURFACES AND URGE THEM APART AGAINST THEIR BIAS, AND THE SAID SPINDLE MOVES ALONG THE SAID SLOTS SO THAT ITS MOVEMENT IS AT LEAST IN PART GUIDED THEREBY.