.~.~> Pendular suspension of optical element or reticle
DEFINITION
Classification: 356/248
(under subclass 247) Subject matter including, for the purpose of establishing a stabilized optical axis, means which tends to maintain its orientation in space irrespective of changes in the orientation of the supporting structure for this means.
SEE OR SEARCH THIS CLASS, SUBCLASS:
143, for similar subject matter used in angle measuring means where a scale and target are simultaneously observable.
148, for similar subject matter used in angle measuring means.
SEE OR SEARCH CLASS
33, Geometrical Instruments,
230, for a gyroscopically stabilized bomb sight, subclass 236, for a gyroscopically stabilized gun sight, subclass 273, for a sighting device having a magnetic compass and a level or plumb, subclass 283, for a vertical angle measurer including a level or plumb, subclass 290, for a sighting device with leveling means, subclass 295, for a surveyor's rod or target with leveling or plumbing means, subclasses 300+, appropriate subclasses for a level or plumb instrument and subclasses 316+ and 318+, for a gyroscopically controlled or stabilized magnetic compass.
