Abstract: Acceleration initiated, velocity limiting self-actuating mechanical relative motion, controlling device having a pair of elements telescopically interconnected for relative motion with respect to each other with a braking surface preferably as an integral part of one of the elements and an interconnecting assembly for converting linear relative displacements of the elements to rotary motion of the internally supported braking mechanism comprising a primary brake assembly preferably coupled to increase mechanical gain and movable into engagement with the braking surface, a freely rotating first mass element to provide relative motion sensitivity, a brake actuating assembly coupling the mass element and the primary brake assembly for causing same to impede relative linear motion of the elements and a velocity sensitive braking assembly actuatable at a given angular velocity to impede rotation of the same element and thereby increase and sustain the braking force applied by the primary brake assembly.

Abstract: A thrust bearing adapted for high and low pressure loading for supporting an end of a shaft for rotation about its longitudinal axis comprising a ball bearing confined in concentric relation at the end of the shaft to be supported and a part recessed into the end of the shaft which rests against the ball bearing structured to dissipate heat and of a composition such that at high loads and high velocity, it functions as a solid lubricant and at low loads and low velocity, it functions as a solid.