Method and apparatus for producing a controlled preload on a tra

Measuring and testing – Speed – velocity – or acceleration – Acceleration determination utilizing inertial element

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29 2541, 29446, 29447, 29450, 29602R, 73431, B23P 1513, G01P 1102

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045559457

ABSTRACT:
A transducer assembly includes first and second stators which are axially aligned with, and bear upon opposite sides of a proof mass. The stators and proof mass are clamped together by means of a sleeve having a side portion with upper and lower flanges projecting therefrom. An inner sleeve element, formed from a material having a different coefficient of thermal expansion than the side portion, is disposed between the flanges. The temperature of the sleeve is controlled such that the inner sleeve element produces a tensile stress on said flanges, increasing the spacing therebetween. The flanges are then joined to the stators. Thereafter, the temperature of the sleeve is controlled such that the tensile stress produced by the inner sleeve element on the flanges is reduced producing a compression force tending to reduce the flange spacing. This compression force is transmitted to the stators and proof mass as a controlled compressive axial preload.

REFERENCES:
patent: 3152485 (1964-10-01), Lones et al.
patent: 3339419 (1967-09-01), Wilcox
patent: 3673873 (1972-07-01), Estes et al.
patent: 3702073 (1972-11-01), Jacobs
patent: 3792526 (1974-02-01), Bremseth
patent: 4169309 (1979-10-01), Meginnis

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