Honeywell International Inc.

Honeywell G.m.b.h.

John R Leonard

Bruce W Rogers

Matthew Brady McEwen

Jesse A Vaught

Methods are provided for calibrating a tachometer or generator device to reduce residual errors associated with the tachometer-generator device. A shim structure is positioned within the air gap of the tachometer-generator device. A physical characteristic or location of placement of the shim structure is selected to reduce variation in an output voltage of the tachometer-generator device.

Calibration of a generator device

A magnetic shield has a multiple-layered lid and a multiple-layered base, wherein each layer of the lid is aligned with the corresponding layer of the base. The magnetic shield also includes an alignment mechanism to maintain the alignment of the corresponding layers of the lid and the base of the shield.

Magnetic shield for optical gyroscopes

An optical element driving mechanism is disclosed wherein an electromagnetic motor positions an optical element such that a laser beam passing through the optical element is focused onto an optical disk media. The optical element can be translated in two axes by energizing coils suspended within stationary magnetic fields produced by permanent magnets. The magnitude and direction of displacement is controlled by the current passing through the coils. A two axis electro-optical position sensing apparatus for determining the position of the optical element is embedded within the driving mechanism. The position sensing apparatus detects the relative position of the optical element in two axes by imaging a light emitting diode onto a four element photodetector.

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Glendale, AZ, United States of America

John R Leonard