Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1982-09-27
1984-12-25
Stephan, Steven L.
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
33180R, G11B 310
Patent
active
044908164
ABSTRACT:
A phonograph cartridge alignment gauge includes a plate, a cartridge work station and a visual indicator. A method of aligning a cartridge on a tone arm with the gauge, for stylus tangency at two radii, includes fastening the cartridge to the tone arm while the cartridge is on the work station and the turntable spindle is within a combination pivot point-spindle opening of the gauge, to establish stylus tangency at a first radii. The cartridge is refastened to the tone arm while the cartridge remains in the work station but after the tone arm is moved and the gauge pivoted about the combination opening, to establish stylus tangency at a second radii while maintaining tangency at the first. An alternate gauge and method include similar details.
REFERENCES:
patent: 3283411 (1966-11-01), Steward
patent: 3493234 (1970-02-01), Voss et al.
patent: 4295277 (1981-10-01), Dennesen et al.
patent: 4326283 (1982-04-01), Towlan et al.
patent: 4351045 (1982-09-01), Townshend
patent: 4368527 (1983-01-01), Goldstein
patent: 4423499 (1983-12-01), Peschel
B. V. Pisha, "Dennesen Geometric Sountracktor and Vertical Tracking Angle Gauge", Audio, Mar. 1980.
John Borwick, "An Aid to Cartridge Installation," Grammophone, Apr. 1981.
"Dennesen Soundtractor," A Homemade Alignment Protractor, DB Systems DBP--10 Alignment Gauge, Stereophile, Aug. 1980.
H. G. Baerwald, "Analytic Treatment of Tracking Error and Notes on Optimal Pick--Up Design", Journal of the Society of Motion Picture Engineers, vol. 37, pp. 591-622, Dec. 1941.
R. J. Gilson, "The Cartridge Alignment Problem", Wireless World, Oct. 1981.
R. J. Gilson, "Cartridge Alignment Gauge", Wireless World, Nov. 1981.
Shure Brothers Inc.
Stephan Steven L.
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