US PATENT SUBCLASS 356 / 138
ANGLE MEASURING OR ANGULAR AXIAL ALIGNMENT

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


356 /   HD   OPTICS: MEASURING AND TESTING

138ANGLE MEASURING OR ANGULAR AXIAL ALIGNMENT {11}
139  DF  .~> Plural scales or different portions of same scale simultaneously observable
139.01  DF  .~> Star/Sun/Satellite position indication with photodetection {1}
139.03  DF  .~> Relative attitude indication along 3 axes with photodetection
139.04  DF  .~> Automatic following or aligning while indicating measurement {3}
139.09  DF  .~> Wheel alignment with photodetection
139.1  DF  .~> Photodetection of inclination from level or vertical
140  DF  .~> Apex of angle at observing or detecting station {6}
150  DF  .~> Sides of angle or axes being aligned transverse to optical axis (e.g., drift meter) {1}
152.1  DF  .~> With photodetection remote from measured angle {2}
153  DF  .~> Alignment of axes nominally coaxial
154  DF  .~> With screen {1}

DEFINITION

Classification: 356/138

(under the class definition) Subject matter including means to measure an angle by determining the direction of related

light; or including means for determining the alignment of two axes by light rays related as by coincidence with such axes.

(1) Note. Where two objects are laterally aligned by displacing one relative to another and alignment involves no rotation about an axis classification is in subclass 399.

(2) Note. The axes may be imaginary as, for example, an axis along the length of a vehicle or normal to a surface. Also different parts of a continuous line may be considered as plural axes as, for example, in testing the straightness of a rail or a gun barrel.

(3) Note. Alignment occurs when the two axes form a common axis or are parallel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

399+, for alignment in a lateral direction. See also (1) Note above. SEE OR SEARCH CLASS

33, Geometrical Instruments, appropriate subclasses for a light ray type axial alignment device and

276+, 281, 282+, and 285, for a light ray type angle measuring device, without any significant optical feature.