Torsion spool

Details Torsion spool Torsion spool

1976-10-07

1977-12-27

Spar, Robert J.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Pawl actuated

226118, 242 471, B66D 126

Patent

active

040651010

ABSTRACT:
A stationary gear is keyed to a center shaft which is supported longitudinally in a frame. Gears identical with the stationary gear mesh therewith as equally spaced satellites therearound. The satellite gears are fixed on respective satellite shafts, which are mounted for rotation in and between a pair of longitudinally spaced plates that are mounted for rotation on the center shaft. Cylinders, on which are defined helical grooves for engaging a line, are keyed to the respective satellite shafts for rotation therewith. The helical grooves of the respective cylinders have a transverse pitch angle per revolutions of the respective cylinders and plates that is a function of the distance between centers of adjacent cylinders and the center angle subtended thereby, the common diameter of center and cylinder gears, and the diameter of the engaging line, that add up closest to "1H" and straight tracking to provide a tracking error of less than 0.1.degree. instead of a usual tracking error of 3.degree..

REFERENCES:
patent: 1661275 (1928-03-01), Stensland
patent: 2317747 (1943-04-01), Ewing

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