Patent US3569637A successfully refreshed from Google Patents.
US3569637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas environment for recorder-reproducer systems
Assignee: RCA Corp
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Filing: 1968-10-14
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Granted: 1971-03-09
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Expires: 1988-10-14
Abstract
Abstract A technique is disclosed for minimizing undesirable frictional effects at the transducer-record medium interface of a recorderreproducer system. The recorder-reproducer system is provided at the transducer-record medium interface with a gaseous environment with adsorptive properties which exceed those of water vapor. The adsorptive properties which exceed those of water vapor. The adsorptive properties of the gas result in a sufficient adsorption of the gas at the record medium to produce and sustain, upon desorption at the transducer-record medium interface, a friction reducing effect.
Inventors
- 👤 Harold Esten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:47
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/62
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
81 words
In a system including a magnetic record medium in contacting relation with a magnetic transducer, an apparatus for reducing the frictional relationship between said medium and said transducer, comprising: a chamber which encloses at least the interface region of said transducer and said record medium; and means for providing a gaseous atmosphere within said chamber, said gaseous atmosphere including a predominating gas whose product of specific energy of adsorption and amount which is adsorbed, exceeds such a product for water vapor.
Claim 2
Dependent Claim
81 words
In a system including a magnetic record medium in contacting relation with a magnetic transducer, an apparatus for reducing the frictional relationship between said medium and said transducer, comprising: a chamber which encloses at least the interface region of said transducer and said record medium; and means for providing a gaseous atmosphere within said chamber, said gaseous atmosphere including a predominating gas whose product of specific energy of adsorption and amount which is adsorbed, exceeds such a product for water vapor.
Claim 3
Dependent Claim
18 words
The invention as claimed in claim 1, wherein the gas having the specified adsorptive property is carbon dioxide.
Claim 4
Dependent Claim
18 words
The invention as claimed in claim 1, wherein the gas having the specified adsorptive property is sulfur hexafluoride.
Claim 5
Dependent Claim
26 words
The invention as claimed in claim 1, means for providing said gas within said chamber at a pressure of at least one atmospheRe of absolute pressure.
Claim 6
Dependent Claim
21 words
The invention as claimed in claim 1, further including means for controlling the amount of water vapor present within said chamber.
Claim 7
Dependent Claim
19 words
The invention as claimed in claim 5, the relative humidity within said chamber is not greater than 4 percent.
Claim 8
Dependent Claim
38 words
The invention as claimed in claim 1, wherein said gaseous atmosphere comprises a mixture of oxygen and a gas whose product of specified energy of adsorption and amount which is adsorbed, exceeds such a product for water vapor.
Claim 9
Dependent Claim
23 words
The invention as claimed in claim 7, wherein said mixture is 20 percent oxygen and 80 percent gas with the specified adsorptive properties.
Claim 10
Dependent Claim
96 words
In a recorder-reproducer system including a magnetic recording medium and a magnetic transducer, a method of enhancing system performance through reduction of frictional effects at the interface of said record medium and said transducer comprising moving said record medium past said transducer in operative contacting relation therewith, and providing a gaseous atmosphere which envelops at least the record medium-transducer interface portion of said recorder-reproducer system said gaseous atmosphere being substantially constituted of a gas whose product of specific surface energy of adsorption and amount which is adsorbed, is greater than such a product for water vapor.
Claim 11
Dependent Claim
96 words
In a recorder-reproducer system including a magnetic recording medium and a magnetic transducer, a method of enhancing system performance through reduction of frictional effects at the interface of said record medium and said transducer comprising moving said record medium past said transducer in operative contacting relation therewith, and providing a gaseous atmosphere which envelops at least the record medium-transducer interface portion of said recorder-reproducer system said gaseous atmosphere being substantially constituted of a gas whose product of specific surface energy of adsorption and amount which is adsorbed, is greater than such a product for water vapor.
Claim 12
Dependent Claim
11 words
The method of claim 9, wherein said gas is carbon dioxide.
Claim 13
Dependent Claim
11 words
The method of claim 9, wherein said gas is sulfur hexafluoride.
Claim 14
Dependent Claim
99 words
In combination: a magnetic record medium; means including a signal transducer in contacting relation with said record medium for recording signals on and reproducing signals from said record medium; means for producing relative motion between said record medium and signal transducer; and means for providing a gaseous environment for at least the region of contact between said signal transducer and said record medium, said gaseous environment being substantially comprised of a gas with the property that its product of specific energy of adsorption and amount which is adsorbed at said record medium exceeds such a product for water vapor.
Claim 15
Dependent Claim
99 words
In combination: a magnetic record medium; means including a signal transducer in contacting relation with said record medium for recording signals on and reproducing signals from said record medium; means for producing relative motion between said record medium and signal transducer; and means for providing a gaseous environment for at least the region of contact between said signal transducer and said record medium, said gaseous environment being substantially comprised of a gas with the property that its product of specific energy of adsorption and amount which is adsorbed at said record medium exceeds such a product for water vapor.
Claim 16
Dependent Claim
62 words
The combination comprising: a signal transducer intended for use in contacting signal transducing relation with a record medium; means for providing a gaseous atmosphere at the interface region of said transducer and said record medium with said gaseous atmosphere being predominately a gas whose product of specific energy of adsorption and amount which is adsorbed, exceeds such a product for water vapor.
Claim 17
Dependent Claim
62 words
The combination comprising: a signal transducer intended for use in contacting signal transducing relation with a record medium; means for providing a gaseous atmosphere at the interface region of said transducer and said record medium with said gaseous atmosphere being predominately a gas whose product of specific energy of adsorption and amount which is adsorbed, exceeds such a product for water vapor.
References Cited (Backward Citations)
US3380043A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |