US3583709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning head direction memory device for recording and reproducing apparatus
Assignee: International Business Machines Corp
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Filing: 1969-01-14
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Granted: 1971-06-08
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Expires: 1989-01-14
Abstract
Abstract A magnetic head is driven in opposite directions across a recording medium for scanning in a line-by-line arrangement through stepping the magnetic head in a direction normal to its driven direction at each end of its movement in opposite direction. When it is desired to move the head manually in a direction normal to the driven locations, retaining means, which hold the head against stepping except at each end of its movement in opposite directions, is released. Memory means insures that the retaining means is returned into its retaining position in the correct relationship with the direction in which the head is being driven when manual movement is completed.
Inventors
- 👤 William L Dollenmayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:44
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/004
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
265 words
An apparatus for scanning a recording medium in opposite directions including: transducer means for recording on and/or listening to the recording medium; means to move one of said transducer means and the recording medium relative to the other uninterruptedly in opposite directions to cause scanning of the recording medium by said transducer means; means to step one of said transducer means and the recording medium a predetermined distance in a direction normal to the scanning direction; said stepping means includes means to allow stepping only when scanning in each of the directions is being completed; said allowing means including: first means to allow stepping by said stepping means when scanning in one of the directions is being completed; and second means to allow stepping by said stepping means when scanning in the other of the directions is being completed; means to render said first and second allowing means ineffective while said moving means remains effective to continue to move the movable one of said transducer means and the recording medium uninterruptedly for its complete travel in each of the opposite scanning directions when movement of the stepping one of said transducer means and the recording medium in directions normal to the scanning direction is desired irrespective of tee scanning position of the movable one of said transducer means and the recording medium; and means to insure that said first and second means of said allowing means are properly oriented with respect to the scanning direction of movement of the movable one of said transducer means and the recording medium when said rendering means becomes ineffective.
Claim 2
Independent Claim
265 words
An apparatus for scanning a recording medium in opposite directions including: transducer means for recording on and/or listening to the recording medium; means to move one of said transducer means and the recording medium relative to the other uninterruptedly in opposite directions to cause scanning of the recording medium by said transducer means; means to step one of said transducer means and the recording medium a predetermined distance in a direction normal to the scanning direction; said stepping means includes means to allow stepping only when scanning in each of the directions is being completed; said allowing means including: first means to allow stepping by said stepping means when scanning in one of the directions is being completed; and second means to allow stepping by said stepping means when scanning in the other of the directions is being completed; means to render said first and second allowing means ineffective while said moving means remains effective to continue to move the movable one of said transducer means and the recording medium uninterruptedly for its complete travel in each of the opposite scanning directions when movement of the stepping one of said transducer means and the recording medium in directions normal to the scanning direction is desired irrespective of tee scanning position of the movable one of said transducer means and the recording medium; and means to insure that said first and second means of said allowing means are properly oriented with respect to the scanning direction of movement of the movable one of said transducer means and the recording medium when said rendering means becomes ineffective.
Claim 3
Dependent Claim
58 words
The apparatus according to claim 1 in which: said stepping means includes means to continuously urge the one of said transducer means and the recording medium that is stepped in the direction normal to the scanning directions; and means to prevent said urging means from being effective except when scanning in each of the directions is being completed.
Claim 4
Dependent Claim
79 words
The apparatus according to claim 1 including: first means to support one of said transducer means and the recording medium; second means to support the other of said transducer means and the recording medium; and said first support means being movable by said stepping means relative to said second support means to cause movement of the one of said transducer means and the recording medium supported by said first support means in the direction normal to the scanning directions.
Claim 5
Dependent Claim
145 words
The apparatus according to claim 1 in which: said insuring means includes means cooperating with said first and second allowing means; said cooperating means includes: means responsive to the relative moveMent of said transducer means and the recording medium in each of the scanning directions irrespective of whether said rendering means is effective or ineffective; and said responsive means moving said first allowing means to the position in which said first allowing means allows said stepping means to be effective when the movable one of said transducer means and the recording medium is completing movement in one of the scanning directions and moving said second allowing means to the position in which said second allowing means allows said stepping means to be effective when the movable one of said transducer means and the recording medium is completing movement in the other of the scanning directions.
Claim 6
Dependent Claim
185 words
The apparatus according to claim 4 in which: said responsive means includes: a slidably mounted member slidable between first and second positions; first and second means mounted on said slidably mounted member in spaced relation to each other in the direction in which said slidably mounted member slides; one of said first and second mounted means being movable when the movable one of said transducer means the the recording medium is completing movement in one of the scanning directions to move said slidably mounted member to one of its first and second positions and the other of said first and second mounted means being movable when the movable one of said transducer means and the recording medium is completing movement in the other of the scanning directions to move said slidably mounted member to the other of its first and second positions; means to retain said slidably mounted member in one of its first and second positions when scanning is occurring in the opposite direction; and means to release said retaining means in response to one of said first and second mounted means being movable.
Claim 7
Dependent Claim
36 words
The apparatus according to claim 5 in which said release means includes means to rotate said slidably mounted member to release said slidably mounted member from said retaining means before said slidably mounted member may slide.
Claim 8
Dependent Claim
86 words
The apparatus according to claim 1 in which: said allowing means includes: a pair of pawls; means cooperating with said pawls to have engagement between one of said pawls and said cooperating means when scanning in one direction is being completed and to have engagement between the other of said pawls and said cooperating means when scanning in the other direction is being completed; and said cooperating means and said pawls having a cooperating arrangement to control the predetermined distance of movement by said stepping means.
Claim 9
Dependent Claim
21 words
The apparatus according to claim 7 in which said pawls are pivotally mounted and movable into engagement with said cooperating means.
Claim 10
Dependent Claim
157 words
The apparatus according to claim 7 in which: said insuring means includes: second means cooperating with said pawls to cause movement of one of said pawls into engagement with said cooperating means and movement of the other of said pawls out of engagement with said cooperating means when movement of the movable one of said transducer means and the recording medium is being completed in one of the scanning directions and to cause movement of said other pawl into engagement with said cooperating means and movement of said one pawl out of engagement with said cooperating means when movement of the movable one of said transducer means and the recording medium is being completed in the other of the scanning directions; and said second cooperating means including means responsive to the relative movement of said transducer means and the recording medium in each of the scanning directions irrespective of whether said rendering means is effective or ineffective.
Claim 11
Dependent Claim
180 words
The apparatus according to claim 9 in which: said responsive means of said second cooperating means includes: means movable between first and second positions, said movable means being movable from the first position to the second Position when movement of the movable one of said transducer means and the recording medium is being completed in one of the scanning directions and from the second position to the first position when movement of the movable one of said transducer means and the recording medium is being completed in the other of the scanning directions; means to retain said movable means in each of the first and second positions as relative movement of said transducer means and the recording medium occurs in the opposite scanning direction; and means to release said movable means from said retaining means when movement of the movable one of said transducer means and the recording medium is being completed in the opposite direction to allow said movable means to move from one of the first and second positions to the other of the first and second positions.
Claim 12
Dependent Claim
39 words
The apparatus according to claim 10 in which said movable means is slidable in the scanning directions with said movable means sliding in the direction of movement of the movable one of said transducer means and the recording medium.
Claim 13
Dependent Claim
33 words
The apparatus according to claim 11 in which said release means includes means to rotate said movable means to release said movable means from said retaining means before said movable means may slide.
Claim 14
Dependent Claim
152 words
The apparatus according to claim 3 in which: said allowing means includes: a pair of teeth mounted on one of said first support means and said second support means; a longitudinal member mounted on the other of said first support means and said second support means, said longitudinal member having means to engage each of said teeth; said teeth being disposed on opposite sides of said longitudinal member; said longitudinal member cooperating with said teeth to have engagement between one of said teeth and said engaging means of said longitudinal member when scanning in one direction is being completed and to have engagement between the other of said teeth and said engaging means of said longitudinal member when scanning in the other direction is being completed; and said engaging means of said longitudinal member being arranged to determine the predetermined distance of movement of said first support means by said stepping means.
Claim 15
Dependent Claim
119 words
The apparatus according to claim 3 in which: said allowing means includes: a pair of pawls mounted on one of said first support means and said second support means; means mounted on the other of said first support means and said second support means and cooperating with said pawls to have engagement between one of said pawls and said cooperating means when scanning in one direction is being completed and to have engagement between the other of said pawls and said cooperating means when scanning in the other direction is being completed; and said operating means and said pawls having a cooperating arrangement to control the predetermined distance of movement of said first support means by said stepping means.
Claim 16
Dependent Claim
104 words
The apparatus according to claim 14 in which: said cooperating means is a ratchet wheel with teeth on opposite sides; said ratchet wheel being rotatable when said stepping means moves said first support means; said ratchet wheel having teeth on one side for cooperation with one of said pawls and teeth on the opposite side for cooperation with the other of said pawls; and said teeth on one side of said ratchet wheel being staggered in the rotary direction with respect to the teeth on the other side to produce he predetermined distance of movement by said stepping means by said ratchet wheel rotating.
Claim 17
Dependent Claim
26 words
The apparatus aCcording to claim 16 in which: said longitudinal member is a rack; and said means on said longitudinal member are teeth on said rack.
Claim 18
Dependent Claim
53 words
The apparatus according to claim 14 in which: said cooperating means is a longitudinal member having means to engage said pawls; and said pawls being spaced from each other in the longitudinal direction of said longitudinal member to produce the predetermined distance of movement of said first support means by said stepping means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |