Patent EP0126371A2 successfully refreshed from Google Patents.
EP0126371A2
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Floppy disk drive apparatus
Assignee: Toshiba Tec Corp
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Filing: 1984-05-08
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Granted: —
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Expires: 2004-05-08
Abstract
Abstract A floppy disk drive apparatus includes a control signal generating circuit (38) for generating a step signal and a direction instruction signal, head driving section (12, 40, 42, 46, 48) for driving a magnetic head in the radial direction of a floppy disk, and a detector circuit (22, 30, 32, 34, 36, 50) for generating an output signal when the magnetic head locates in the outer limit location of the floppy disk. The detector circuit (22, 30, 32, 34, 36, 50) is inhibited from generating an output signal in response to the direction instruction signal generated for driving the magnetic head in an inner direction of the floppy disk.
Inventors
- 👤 Shunji Saito
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 06:44
CPC Classifications
G; G11; G11B; G11B19/00; G11B19/20; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521; G11B5/5526; G11B5/553
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
64 words
A floppy disk drive apparatus comprising a magnetic head section (16) attached on a carrier (10); a control signal generating circuit (38; 106) for generating a step signal and a direction instruction signal; first drive means (6) for rotating a floppy disk (4); second drive means (12, 40, 42, 46, 48; 12, 40, 42, 47, 49; 12, 112) for driving said magnetic head section
Claim 2
Dependent Claim
64 words
A floppy disk drive apparatus comprising a magnetic head section (16) attached on a carrier (10); a control signal generating circuit (38; 106) for generating a step signal and a direction instruction signal; first drive means (6) for rotating a floppy disk (4); second drive means (12, 40, 42, 46, 48; 12, 40, 42, 47, 49; 12, 112) for driving said magnetic head section
Claim 3
Dependent Claim
112 words
(16) in the radial direction of said floppy disk (4) in response to the step signal and the direction instruction signal from said control signal generating circuit (38; 106); and detecting means (22, 30, 32, 34, 36, 50; 22, 100, 114) for generating an output signal when it detects that said magnetic head section (16) locates in the outer limit location of said floppy disk (4); characterized in that said detecting means (22, 30, 32, 34, 36, 50; 22, 100, 114) is inhibited from generating an output signal in response to the direction instruction signal generated for driving said magnetic head section (16) in an inner direction of said floppy disk (4).
Claim 4
Dependent Claim
112 words
(16) in the radial direction of said floppy disk (4) in response to the step signal and the direction instruction signal from said control signal generating circuit (38; 106); and detecting means (22, 30, 32, 34, 36, 50; 22, 100, 114) for generating an output signal when it detects that said magnetic head section (16) locates in the outer limit location of said floppy disk (4); characterized in that said detecting means (22, 30, 32, 34, 36, 50; 22, 100, 114) is inhibited from generating an output signal in response to the direction instruction signal generated for driving said magnetic head section (16) in an inner direction of said floppy disk (4).
Claim 5
Dependent Claim
87 words
A floppy disk drive apparatus according to claim 1, characterized in that said detecting means includes a detection circuit (22, 30, 32, 34, 50) for generating an output signal when it detects that said magnetic head section (16) is in said outer limit location and an inhibit circuit (26) for generating an inhibit signal to said detection circuit (22, 30, 32, 34, 50) in response to the direction instruction signal generated for driving said magnetic head section (16) in the inner direction of said floppy disk (4).
Claim 6
Dependent Claim
35 words
A floppy disk drive apparatus according to claim 2, characterized in that said inhibit circuit is a latch circuit (36) for latching data corresponding to the direction instruction signal in response to the step signal.
Claim 7
Dependent Claim
72 words
A floppy disk drive apparatus according to claim 2 or 3, characterized in that said detector circuit includes an outer limit location detector (22, 30, 32, 50) for generating an output signal when it detects that said magnetic head section (16) is in said outer limit location and an AND gate circuit (34) connected to receive output signals from said inhibit circuit (36) and outer limit location detector (22, 30, 32, 50).
Claim 8
Dependent Claim
78 words
A floppy disk drive apparatus according to claim 4, characterized by further comprising a control circuit (60) for preventing the step signal from being supplied to said second drive means (12, 40, 42, 46, 48; 12, 40, 42, 47, 49) in response to an output signal from said outer limit location detector (22, 30, 32, 50) and the direction instruction signal generated for driving said magnetic head section (16) in an outer direction of said floppy disk (4).
Claim 9
Dependent Claim
20 words
A floppy disk drive apparatus according to claim 5, characterized in that said control circuit (60) includes an AND circuit.
Claim 10
Dependent Claim
102 words
A floppy disk drive apparatus according to claim 1, characterized in that said detecting means includes a detection circuit (22, 114) for generating an output signal when it detects that said magnetic head section (16) is in a limited area containing said outer limit location, memory means (MA, MB, MC, MD) for storing data corresponding to drive signals supplied to said second drive means (12, 112), and data processing unit (100) for generating an output signal when it detects, that said detection circuit (22, 114) generates an output signal and predetermined data is stored in said memory means (MA, MB, MC, MD).
References Cited (Backward Citations)
No citation records indexed.
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