US3592976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable concave guides for rotary head magnetic tape machines
Assignee: Forglo Corp
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Filing: 1968-11-01
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Granted: 1971-07-13
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Expires: 1988-11-01
Abstract
Abstract A concave guide is so constructed that the shape of different portions of the guide can be adjusted to selectively change the shape and curvature of the guide. The arrangement is such that the guide can be adjustably deformed to an S-shaped curvature if desired. In the preferred embodiment the guide includes two arms projecting from a point of rigid connection with a body, adjusting screws at the ends of the arms can be manipulated to change the curvature of the arms, and a vacuum source communicates with the guide at the location of connection with the body.
Inventors
- 👤 James J Mcginnis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:33
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/61
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
107 words
A concave vacuum guide to hold a magnetic tape in relation to a cylindrical rotating head drum comprising a body, a pair of curved arms disposed in end to end relation and together providing a continuous concave surface conforming in general with the cylindrical surface of said drum, said arms being integrally united at their meeting ends, the junction of such meeting ends being rigidly secured to said body, said arms being otherwise spaced from said body throughout their length, said arms being flexible, and means for independently adjusting the free ends of said arms relative to said body to alter thEir radius of curvature as desired.
Claim 2
Dependent Claim
107 words
A concave vacuum guide to hold a magnetic tape in relation to a cylindrical rotating head drum comprising a body, a pair of curved arms disposed in end to end relation and together providing a continuous concave surface conforming in general with the cylindrical surface of said drum, said arms being integrally united at their meeting ends, the junction of such meeting ends being rigidly secured to said body, said arms being otherwise spaced from said body throughout their length, said arms being flexible, and means for independently adjusting the free ends of said arms relative to said body to alter thEir radius of curvature as desired.
Claim 3
Dependent Claim
60 words
A concave guide in accordance with claim 1 in which said body is provided with a passageway communicating with a source of vacuum, and the continuous concave surface of said two arms being formed with at least one groove connected with said passageway, said groove lying in a plane at substantial right angles to the axis of the head drum,
Claim 4
Dependent Claim
57 words
A concave vacuum guide in accordance with claim 1 in which said adjusting means comprises a screw threaded in an opening in each end of said body and having an extension connected with the free end of the arm, whereby turning said screw will move the free end of said arm toward or away from said body.
Claim 5
Dependent Claim
41 words
A concave vacuum guide in accordance with claim 3 in which a nut is secured to the free end of each arm, and said extension is threaded and passes freely through an opening in the arm but threadedly engages said nut.
Claim 6
Dependent Claim
52 words
A concave vacuum guide in accordance with claim 4 in which the extension of the screw which engages said nut is of smaller diameter than the main portion of the screw which engages said body, but threaded in the same direction, thus providing a differential screw capable of making extremely fine adjustments.
Claim 7
Dependent Claim
66 words
A panel for recording and reproducing television pictures by means of magnetic tape, said panel comprising a cylindrical rotary head drum carrying on its periphery a series of magnetic heads, a concave vacuum guide for said tape having a continuous concave surface embracing said drum at one side, and means for selectively changing the curvature of different portions of the continuous concave surface of said guide.
Claim 8
Dependent Claim
66 words
A panel for recording and reproducing television pictures by means of magnetic tape, said panel comprising a cylindrical rotary head drum carrying on its periphery a series of magnetic heads, a concave vacuum guide for said tape having a continuous concave surface embracing said drum at one side, and means for selectively changing the curvature of different portions of the continuous concave surface of said guide.
Claim 9
Dependent Claim
62 words
A panel for recording and reproducing television pictures by means of magnetic tape, said panel comprising a cylindrical rotary head drum carrying on its periphery a series of magnetic meads, a concave vacuum guide for said tape having a continuous concave surface embracing said drum at one side, and means for changing the shape of the continuous concave surface of said guide.
Claim 10
Dependent Claim
62 words
A panel for recording and reproducing television pictures by means of magnetic tape, said panel comprising a cylindrical rotary head drum carrying on its periphery a series of magnetic meads, a concave vacuum guide for said tape having a continuous concave surface embracing said drum at one side, and means for changing the shape of the continuous concave surface of said guide.
Claim 11
Dependent Claim
96 words
A concave vacuum guide to hold a magnetic tape in relation to a cylindrical rotating head drum comprising a body, curved arm providing a continuous concave surface conforming in general with the cylindrical surface of said drum, said arm being rigidly secured to said body at a location spaced from a free end of the arm, said arm being otherwise spaced from said body throughout its length, said arm being flexible, and means for adjusting at least the free end of said arm relative to said body to alter the radius of curvature of the arm.
Claim 12
Dependent Claim
96 words
A concave vacuum guide to hold a magnetic tape in relation to a cylindrical rotating head drum comprising a body, curved arm providing a continuous concave surface conforming in general with the cylindrical surface of said drum, said arm being rigidly secured to said body at a location spaced from a free end of the arm, said arm being otherwise spaced from said body throughout its length, said arm being flexible, and means for adjusting at least the free end of said arm relative to said body to alter the radius of curvature of the arm.
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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |