US4630155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head shifting means for flexible disk memory system
Assignee: Mitsubishi Electric Corp
•
Filing: 1983-08-22
•
Granted: 1986-12-16
•
Expires: 2003-08-22
Abstract
Abstract A magnetic head shifting apparatus for flexible disk memory system wherein kinetic energy of an arm is absorbed by means of a cushioning material interposed between the arm and an abutment of a shackle rod thereby to reduce a transient period of time which is the one until the memory medium and magnetic heads reach their stable state, while damage of the memory medium is suppressed in steady state, whereby stable electromagnetic conversion characteristics can be obtained.
Inventors
- 👤 Tadashi Hasegawa
- 👤 Yoshiharu Kobayashi
- 👤 Akira Iwamoto
- 👤 Yoshihisa Tedaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:09
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/54
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
187 words
A magnetic head shifting means for memory system including a flexible disk, said means comprising: (a) a carriage movable in a radial direction of said flexible disk and supporting either of a pair of magnetic heads, said magnetic heads facing each other with said flexible disk therebetween; (b) an arm, one end of which is joined to said carriage and another end of which carries the other of said magnetic heads; (c) a coiled spring for applying a prescribed pressure to said arm; (d) a spring-loaded member for holding said coiled spring; and (e) a shackling means extending from said spring-loaded member to said arm for restricting movement of said arm due to pressing of said coiled spring, said shackling means including a shackle rod the upper end of which is secured to said spring-loaded member, and the lower end of which is provided with an abutment portion and a cushioning material contacting with said arm in the recording/reproducing position, whereby a damping effect is provided in the direction that said head comes into contact with said flexible disk so that movable parts may be directly damped.
Claim 2
Dependent Claim
187 words
A magnetic head shifting means for memory system including a flexible disk, said means comprising: (a) a carriage movable in a radial direction of said flexible disk and supporting either of a pair of magnetic heads, said magnetic heads facing each other with said flexible disk therebetween; (b) an arm, one end of which is joined to said carriage and another end of which carries the other of said magnetic heads; (c) a coiled spring for applying a prescribed pressure to said arm; (d) a spring-loaded member for holding said coiled spring; and (e) a shackling means extending from said spring-loaded member to said arm for restricting movement of said arm due to pressing of said coiled spring, said shackling means including a shackle rod the upper end of which is secured to said spring-loaded member, and the lower end of which is provided with an abutment portion and a cushioning material contacting with said arm in the recording/reproducing position, whereby a damping effect is provided in the direction that said head comes into contact with said flexible disk so that movable parts may be directly damped.
Claim 3
Dependent Claim
27 words
A magnetic head shifting means as claimed in claim 1, wherein said cushioning material is interposed between the abutment portion of said shackle rod and said arm.
Claim 4
Dependent Claim
187 words
A magnetic head shifting means for a memory system including a flexible disk, said means comprising: (a) a carriage movable in a radial direction of said flexible disk and supporting either of a pair of magnetic heads, said magnetic heads facing each other with said flexible disk therebetween; (b) an arm, one end of which is joined to said carriage and another end of which carries the other of said magnetic heads; (c) a coiled spring for applying a prescribed pressure to said arm; (d) a spring-loaded member for holding said coiled spring; and (e) a shackling means disposed between said spring-loaded member and said arm for restricting movement of said arm due to pressing of said coiled spring, said shackling means including a shackle rod the lower end of which is secured to said arm, and the upper end of which is provided with an abutment portion and a cushioning material contacting with said arm in the recording/reproducing position, whereby a damping effect is provided in the direction that said head comes into contact with said flexible disk so that movable parts may be directly damped.
Claim 5
Dependent Claim
187 words
A magnetic head shifting means for a memory system including a flexible disk, said means comprising: (a) a carriage movable in a radial direction of said flexible disk and supporting either of a pair of magnetic heads, said magnetic heads facing each other with said flexible disk therebetween; (b) an arm, one end of which is joined to said carriage and another end of which carries the other of said magnetic heads; (c) a coiled spring for applying a prescribed pressure to said arm; (d) a spring-loaded member for holding said coiled spring; and (e) a shackling means disposed between said spring-loaded member and said arm for restricting movement of said arm due to pressing of said coiled spring, said shackling means including a shackle rod the lower end of which is secured to said arm, and the upper end of which is provided with an abutment portion and a cushioning material contacting with said arm in the recording/reproducing position, whereby a damping effect is provided in the direction that said head comes into contact with said flexible disk so that movable parts may be directly damped.
Claim 6
Dependent Claim
27 words
A magnetic head shifting means as claimed in claim 3, wherein said cushioning material is interposed between said abutment portion of shackle rod and said spring loaded-member.
References Cited (Backward Citations)
FR2108475A5
Cited
FR2299696A1
Cited
US4144466A
Cited
US4166284A
Cited
US4306260A
Cited
DE2948147A1
Cited
US4349851A
Cited
US4247877A
Cited
JPS5633420A
Cited
GB2060979A
Cited
EP0044151A1
Cited
GB2081959A
Cited
US4490635A
Cited
US4423449A
Cited
JPS5788570A
Cited
JPS5794961A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-15 | 1990-06-16 | 1990-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-15 | 1994-06-16 | 1994-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-15 | 1998-06-16 | 1998-12-16 | $7700.00 | Window Closed / Lapsed |