Sperry Corporation

Sperry Rand Corporation

Thomas W Neis

Harold L Swartz

Terrence L Grimes

Donald Harder Leinweber

A null-adjusting tool for aligning a tilt sensor of the electrolytic liquid type to the vertical is provided. A sensor mounting plate with a tilt-sensing element attached thereto is rotated about a pivot pin by the rotation of a coarse and fine adjustment screw. The coarse adjustment screw acts directly on the sensor mounting plate. The fine adjustment screw provides a high degree of position resolution control through a combination of screw thread and lever type mechanical advantage. A digital readout containing a liquid crystal display and self-contained power source is mounted on the null-adjusting tool to provide a visual indication of the angular deviation of the tilt sensor from the vertical during the alignment process.

Tilt sensor null adjusting apparatus

A temperature stable apparatus for mounting an arcuate glass enclosed electrolytic bubble gravity sensor utilizes epoxy cement having a low temperature coefficient of expansion for bonding an end face of a post having a temperature coefficient of expansion equal to that of glass to the center of the glass enclosure of the sensor, and the other end of the post to the center of a rectangular aluminum plate, such that the longitudinal axis of the post is orthogonal to the plate and the plane of the arcuate axis of the enclosure, and such that a chord connecting the ends of the arcuate axis is parallel to the longitudinal axis of the plate.

Temperature stable arcuate bubble gravity sensor mount

The invention comprises apparatus for performing a switching function in aircraft display instruments for providing a high contrast annunciation or indication thereof having a pair of transversal members disposed such that the depression of one of the members causes the rocker arm of a rocker switch engaged therewith to actuate according to the respective member. A linking member pivotally coupled between the two transversal members rotates through a fixed angle in response to the opposing movements of the transversal members causing a pivotally fastened indicator member with which it communicates to rotate such that a portion of the indicator member is rotated toward the face of the display instrument and provides an appropriate annunciation of the switch status.

Pushbutton switch/annunciator for aircraft instruments

Apparatus for indicating attitude failure in an attitude indicator system in which energy is stored and isolated from all other apparatus during normal operation and transferred to the attitude indicator when attitude failure is detected, resulting in an indication of attitude failure.

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Phoenix, AZ, United States of America

Thomas W Neis