Dynamic magnetic information storage or retrieval – Automatic control of a recorder mechanism – Controlling the head
Reexamination Certificate
2005-08-16
2005-08-16
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Automatic control of a recorder mechanism
Controlling the head
C360S075000
Reexamination Certificate
active
06930850
ABSTRACT:
A magnetic disk tester has a head clamp (35, 218) to position a magnetic head (15, 289). The head clamp has a micromotion stage (55, 273) provided with a stage (59, 205) which is horizontally moved by a piezo-element (77). The magnetic head is attached to the piezo-stage (55, 273). On the head clamp (218), a reflective scale (222) is attached to a back face of the piezo-stage, and a laser head (217) is oriented toward the head clamp (218). According to a reflected laser beam from the reflective scale, the position of the magnetic head (289) is detected. An error signal indicating the difference between the detected position and a reference position is used to control the head clamp (218). The piezo-element can operate at high frequencies, to easily make the magnetic head trace a target track and improve the positioning accuracy of the magnetic head.
REFERENCES:
patent: 5808435 (1998-09-01), Mager
patent: 6023145 (2000-02-01), Karaaslan et al.
patent: 6229664 (2001-05-01), Albrecht et al.
patent: 6242910 (2001-06-01), Guzik et al.
patent: 6566870 (2003-05-01), Sorenson et al.
patent: 11-219572 (1999-08-01), None
patent: 2000-322850 (2000-11-01), None
patent: 2001-143412 (2001-05-01), None
Fujii Katsuhiro
Fukuoka Kiyotaka
Hatano Mamoru
Takagi Hitoshi
Kyodo Denshi System Co., Ltd.
Smith Patent Office
Wong K.
LandOfFree
Head clamping apparatus for magnetic disk tester and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Head clamping apparatus for magnetic disk tester and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Head clamping apparatus for magnetic disk tester and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3493076