The carriage assembly (32) slides linearly on a central guide track (44).

In another form of the invention the central guide track is suspended at each end by a flexure.

In one form of the invention the central guide track (44) is suspended at the front end by a flexure (48) and at the rear end by a bearing (50).

The carriage assembly (32) slides linearly on a central guide track (44).

In the second track, a recording mark is previously recorded.

The encoder disk may include a signal track (32) comprising a diffraction grating, and an index track (34) comprising a reflective index mark (35), wherein a width of the index mark is larger than a pitch of the diffraction grating.

Because the tracking mark and the track number mark or the clock mark are formed in projections and recesses along the paths of the magnetic heads, accurate access becomes possible even when the track pitch is reduced.

In another form of the invention the central guide track is suspended at each end by a flexure.

The coding assembly (10) comprises first and second magnetic tracks, the second track comprising a singular datum and being different from the first track in the regular zone.

The tracks each have a servo field comprising one tracking mark (TM) located on the track in one of four discrete tangential positions A, B, C and D on the track.

Maximum number of index points (subdivisions within a track) is 99 with no minimum time limit.

Maximum number of index points (subdivisions of a track) is 99 with no maximum time limit

the approach segment from final approach fix (FAF) to runway threshold is straight and the difference between the final approach course and the runway centreline is not greater than 2o

I didn't even know it was there until I found it here on Traillink.

The site includes an important 19th-century landmark along the Oregon and Mormon Trail.