US3617648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic copying apparatus with inertia control feature
Assignee: International Business Machines Corp
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Filing: 1969-11-13
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Granted: 1971-11-02
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Expires: 1989-11-13
Abstract
Abstract The invention concerns apparatus for making a plurality of duplicate copies from master recordings by using a magnetic transfer technique, particularly involving the steps of applying pressure between a master media and a blank copy media, thereafter moving an assembly of permanent magnets across the superimposed media to effect transfer of the information from the master media to the copy media by utilizing a one-way clutch mechanism interposed between the driving mechanisms and the permanent magnet assembly, all of the foregoing being accomplished by movement of a single operating member accessible to the operator and subsequently, due primarily to the clutch relationship with the permanent magnet assembly, releasing the magnet assembly at the end of its travel, thereby reducing inertia effects that would otherwise be objectionable from a loading standpoint.
Inventors
- 👤 William F Irving
- 👤 Walter F Klein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:28
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/86; G11B5/865
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
313 words
Magnetic transfer apparatus for transferring information from a master media to a copy media and operative to minimize loading effects, comprising: a transfer station including a transfer plane; means for retaining a master and copy media in said transfer plane; transfer means mounted for relative movement adjacent said media in said transfer plane, said transfer means incorporating at least one transfer element that operates at a relatively high force level during a transfer operation; means for relatively moving said transfer means to effect an information transfer from said master media to said copy media, said relative moving means including means for relatively moving said transfer means in a first direction adjacent said media in order to reach a predetermined position from which to start a transfer operation, and subsequently operable to relatively move said transfer means adjacent said media in the opposite direction in a positive manner whereby said one transfer element operates at a relatively high force level; and means for minimizing force effects of said one transfer element during operation of said apparatus, said minimizing means including a one-way clutch assembly interposed between said relative moving means and said transfer means as well as said one transfer element in such a manner that said clutch assembly is essentially disengaged during movement of said transfer means in said first direction, said clutch assembly is positively engaged to drive said transfer means during movement of said transfer means in said opposite direction, and said clutch assembly is further operable to automatically disengage said transfer means, including said one transfer element, from said relative moving means upon termination of movement in said opposite direction, thereby reducing back-loading effects of said one transfer element on said relative moving means and other portions of said apparatus that would otherwise occur due to the high force level achieved by said one element during operation of said apparatus.
Claim 2
Dependent Claim
313 words
Magnetic transfer apparatus for transferring information from a master media to a copy media and operative to minimize loading effects, comprising: a transfer station including a transfer plane; means for retaining a master and copy media in said transfer plane; transfer means mounted for relative movement adjacent said media in said transfer plane, said transfer means incorporating at least one transfer element that operates at a relatively high force level during a transfer operation; means for relatively moving said transfer means to effect an information transfer from said master media to said copy media, said relative moving means including means for relatively moving said transfer means in a first direction adjacent said media in order to reach a predetermined position from which to start a transfer operation, and subsequently operable to relatively move said transfer means adjacent said media in the opposite direction in a positive manner whereby said one transfer element operates at a relatively high force level; and means for minimizing force effects of said one transfer element during operation of said apparatus, said minimizing means including a one-way clutch assembly interposed between said relative moving means and said transfer means as well as said one transfer element in such a manner that said clutch assembly is essentially disengaged during movement of said transfer means in said first direction, said clutch assembly is positively engaged to drive said transfer means during movement of said transfer means in said opposite direction, and said clutch assembly is further operable to automatically disengage said transfer means, including said one transfer element, from said relative moving means upon termination of movement in said opposite direction, thereby reducing back-loading effects of said one transfer element on said relative moving means and other portions of said apparatus that would otherwise occur due to the high force level achieved by said one element during operation of said apparatus.
Claim 3
Dependent Claim
46 words
The apparatus of claim 1, wherein: said transfer means comprises a rotatable shaft member accommodating a concentrically mounted drum member carrying magnetic elements; and wherein said clutch assembLy is mounted in an interposed manner for driving relation between said relative moving means and said transfer means.
Claim 4
Dependent Claim
65 words
The apparatus of claim 2 wherein: said clutch assembly comprises a one-way roller clutch assembly inherently operable to effect driving engagement with said drum member during movement in said opposite direction in a transfer operation and further disengageable upon termination of movement of said drum member to enable a gradual dissipation of force levels established during movement of said drum member in said opposite direction.
Claim 5
Dependent Claim
44 words
The apparatus of claim 1, further comprising: an operator control means; and means mounting said retaining means, said transfer means, said relative moving means, and said clutch assembly for cyclical operation during movement of said operator control means in a predetermined arc of movement.
Claim 6
Dependent Claim
46 words
The apparatus of claim 4, further comprising: copy assurance means incorporated in said apparatus and engageable with said operator control means to ensure a complete cycle of operation once the movement of said operator control means has reached a predetermined point in said arc of movement.
Claim 7
Dependent Claim
80 words
The apparatus of claim 4, further comprising: means incorporated in said relative moving means comprising an endless belt member, associated rack, and first and second pulley elements, one of said pulley elements serving as a drive pulley and the other of said pulley elements serving as an idler pulley; and pinion means associated with said transfer means and engageable with said rack and belt elements for linear driving movement of said transfer means when said operator control means is actuated.
Claim 8
Dependent Claim
41 words
The apparatus of claim 6, further comprising: means for disengaging said relative moving means at a termination point of movement of said transfer assembly to thereby enable a free-running condition of said transfer member due to disengagement of said clutch assembly.
References Cited (Backward Citations)
US3536855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |