Geometrical instruments – Miscellaneous – Light direction
Patent
1983-02-24
1985-06-25
Stearns, Richard R.
Geometrical instruments
Miscellaneous
Light direction
74 8922, 346139B, G01D 1516, F16H 5552
Patent
active
045245207
ABSTRACT:
A system for positioning an X-axis carriage and a Y-axis carriage comprises two flexible coupling elements for the X-axis carriage, and a single flexible coupling element for the Y-axis carriage. Providing two such coupling elements for the X-axis carriage enables shorter-length elements to be used, thereby providing higher dimensional stability under load or temperature variations, and also higher-load capabilities than when a single flexible coupling element is used for the respective carriage. Further, several preferred embodiments are described wherein each of the flexible coupling elements occupies a single plane, thereby enabling belts, rather than cables, to be used, further enhancing the dimensional stability and strength of the system. Still further, in all the described arrangements, the transmission ratio of the two X-axis coupling elements and of the single Y-axis coupling element are all the same, thereby obviating the need for different transmission elements to equalize the transmission ratios.
REFERENCES:
patent: 2685377 (1954-08-01), Auger
patent: 3068575 (1962-12-01), Fenske et al.
patent: 3155383 (1964-11-01), Whitmore
patent: 3258776 (1966-06-01), Boyle et al.
patent: 3850043 (1974-11-01), Tarbox
patent: 4327596 (1982-05-01), Simon
patent: 4420886 (1983-12-01), Amano
Barish Benjamin J.
Stearns Richard R.
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