초록 ▼

The invention achieves a method and a device for providing infinitely variable adjustment to the throw of an eccentric from zero to a maximum while the eccentric is permitted to continuously travel in angular motion. This is achieved by two juxtaposed and eccentric members mounted on a drive shaft,

The invention achieves a method and a device for providing infinitely variable adjustment to the throw of an eccentric from zero to a maximum while the eccentric is permitted to continuously travel in angular motion. This is achieved by two juxtaposed and eccentric members mounted on a drive shaft, one (the outer) overriding, the other (the inner). The eccentric members may be relatively positioned by a control shaft, which extends coaxially through the drive shaft, and gearingly mates with the outer eccentric member. The outer surface of the outer eccentric can be arranged (by relatively positioning the outer and inner eccentric members) to trace the loci of points of a circle, whereupon no reciprocation takes place, or of a family of ellipses of varying eccentricity, whereby reciprocation is achieved in correspondence to the relative eccentricity in the path of travel of the outer surface.

대표청구항 ▼

A dynamically variable throw eccentric comprising: (a) a main drive shaft having a first fixed eccentric member, the shaft extending at one end into an outer spiral thread, while defining a cylindrical recess that extends into the shaft; (b) a sector defined by the shaft communicating with the reces

A dynamically variable throw eccentric comprising: (a) a main drive shaft having a first fixed eccentric member, the shaft extending at one end into an outer spiral thread, while defining a cylindrical recess that extends into the shaft; (b) a sector defined by the shaft communicating with the recess, the shaft also defining a protuberance as a first eccentric member; (c) a control shaft residing in the cylindrical recess and extending beyond said end as a spirally threaded shaft; (d) a movable control sleeve having an inner surface defining a spirally threaded major bore stepping into a spirally threaded minor bore, the threaded major bore threadingly mating with the outer spiral thread of the main shaft and the minor bore threading mating with the spiral threaded control shaft whereby axial movement of the sleeve along the shafts changes, relatively, the angular position of the shafts; (e) a second eccentric member mating with and mounted to travel relative to first eccentric member; and, (f) means for communicating the relative angular position of the shafts through the sector and to responsively locate the relative angular positions of the eccentric members in response thereto irrespective of the angular velocity of the main drive shaft.