US3592158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frictionless readout instrument
Assignee: Atlantic Scientific Corp
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Filing: 1970-01-06
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Granted: 1971-07-13
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Expires: 1990-01-06
Abstract
Abstract A frictionless readout device is disclosed in which guide means magnetically support a flexible magnetic tape for providing an indication corresponding to an input signal, characterized by extremely low power requirement and high precision. The strip is caused to move longitudinally across magnetic means generating a magnetic field of attractive power sufficient to cancel tension exerted longitudinally along the tape and thereby to suspend the tape in a fixed spatial relationship with the magnetic means.
Inventors
- 👤 John Gear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:54
CPC Classifications
G; G01; G01D; G01D13/00; G01D13/02; G01D13/04; G01D13/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
92 words
A readout device for providing an indication corresponding to an input signal, comprising: a housing, including a panel member having a longitudinally extending aperture therein; a flexible magnetic strip extending longitudinally adjacent to the aperture and provided with at least one index visible through the aperture, magnetic means in the housing for magnetically attracting and suspending the magnetic strip within the housing, and a drive member disposed in frictional contact with the magnetic strip for moving the strip along a path such that said index moves longitudinally with respect to the aperture.
Claim 2
Dependent Claim
92 words
A readout device for providing an indication corresponding to an input signal, comprising: a housing, including a panel member having a longitudinally extending aperture therein; a flexible magnetic strip extending longitudinally adjacent to the aperture and provided with at least one index visible through the aperture, magnetic means in the housing for magnetically attracting and suspending the magnetic strip within the housing, and a drive member disposed in frictional contact with the magnetic strip for moving the strip along a path such that said index moves longitudinally with respect to the aperture.
Claim 3
Dependent Claim
36 words
A readout device as defined in claim 1 wherein there are two guide means disposed in back of the panel member adjacent to opposite ends of the aperture having surfaces with which the strip is juxtaposed.
Claim 4
Dependent Claim
22 words
A readout device as defined in claim 1 wherein said index is the boundary between two differently colored portions of said strip.
Claim 5
Dependent Claim
21 words
A readout device as defined in claim 1 wherein the tape is a thin plastic strip coated with a ferromagnetic material.
Claim 6
Dependent Claim
26 words
A readout device as defined in claim 3 including a light source disposed in back of said aperture for illuminating the strip and indicia visible therethrough.
Claim 7
Dependent Claim
52 words
A frictionless tape transport comprising: a housing; a thin flexible magnetic strip disposed therein defining a tape path; drive means frictionally engaging said strip for moving said strip along the path; and magnetic means in said housing for magnetically supporting said strip along the path free of frictional contact with the housing.
Claim 8
Dependent Claim
52 words
A frictionless tape transport comprising: a housing; a thin flexible magnetic strip disposed therein defining a tape path; drive means frictionally engaging said strip for moving said strip along the path; and magnetic means in said housing for magnetically supporting said strip along the path free of frictional contact with the housing.
Claim 9
Dependent Claim
36 words
A readout device as defined in claim 1 wherein there are two guide means disposed in back of the panel member adjacent to opposite ends of the aperture having surfaces with which the strip is juxtaposed.
Claim 10
Dependent Claim
22 words
A readout device as defined in claim 1 wherein said index is the boundary between two differently colored portions of said strip.
Claim 11
Dependent Claim
21 words
A readout device as defined in claim 1 wherein the tape is a thin plastic strip coated with a ferromagnetic material.
Claim 12
Dependent Claim
26 words
A readout device as defined in claim 3 including a light source disposed in back of said aperture for illuminating the strip and indicia visible therethrough.
Claim 13
Dependent Claim
52 words
A frictionless tape transport comprising: a housing; a thin flexible magnetic strip disposed therein defining a tape path; drive means frictionally engaging said strip for moving said strip along the path; and magnetic means in said housing for magnetically supporting said strip along the path free of frictional contact with the housing.
Claim 14
Dependent Claim
52 words
A frictionless tape transport comprising: a housing; a thin flexible magnetic strip disposed therein defining a tape path; drive means frictionally engaging said strip for moving said strip along the path; and magnetic means in said housing for magnetically supporting said strip along the path free of frictional contact with the housing.
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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 |