US3898629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for scanning a data record medium
Assignee: Individual
•
Filing: 1973-01-30
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Granted: 1975-08-05
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Expires: 1993-01-30
Abstract
Abstract A device for scanning a data record medium reads data optically and may also be used to record data on the medium, the medium being scanned by a light beam such as a laser beam. A rotor driven by an electric motor comprises a substantially hollow shaft and at least one hollow arm radially extending from the shaft and being provided with an opening for said scanning. The rotor shaft and the arm or arms contain optical means such as mirrors, prisms and lenses such that a light beam entering the open-ended rotor shaft is passed through the shaft and the arm, and is modulated by recorded data and is then passed through said arm or another arm and through the shaft to a photocell so that both the light input and the light output of the rotor is coaxial with the axis of the rotor shaft. In operation, the record medium such as a photographic film or plate is moved radially away from or towards the axis of the rotor in timed relationship with the rotation of the rotor.
Inventors
- 👤 Erik Gerhard Natana Westerberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:51
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/2407; G11B7/24085; G11B7/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
311 words
Apparatus for reading data from at least one record medium, said apparatus comprising: a. a light source for optically scanning said at least one record medium, b. a detector for detecting the light projected from said light source acting on said at least one record medium, c. a shaft rotatable about an axis, said shaft being open at each end and having hollow portions at least in the portions of said shaft adjacent said open ends, d. drive means for continuously rotating said shaft about said axis and substantially determining the speed at which said apparatus reads data, e. at least one pair of parallel hollow radially extending arms mounted on said shaft, said hollow portions of said shaft communicating with said hollow arms, f. a light permeable opening in each arm of said at least one pair of arms, said openings located functionally opposite each other, one of said openings for focusing light against said at least one record medium, g. optical means for guiding light from said light source entering an open end of said shaft through (i) one of said at least one pair of hollow arms, (ii) said opening in said arm for focusing light against said at least one record medium, (iii) said opening of the other of said at least one pair of hollow arms, (iv) said other hollow arm and (v) out of the other open end of said shaft to said detector, and light from said light source being coaxial with the axis of rotation of said shaft when said light enters an open end of said shaft and when said light exits from the other open end of said shaft, and h. a plurality of bearing means mounting said shaft, said at least one pair of hollow radially extending arms axially located between at least two of said plurality of bearing means.
Claim 2
Dependent Claim
311 words
Apparatus for reading data from at least one record medium, said apparatus comprising: a. a light source for optically scanning said at least one record medium, b. a detector for detecting the light projected from said light source acting on said at least one record medium, c. a shaft rotatable about an axis, said shaft being open at each end and having hollow portions at least in the portions of said shaft adjacent said open ends, d. drive means for continuously rotating said shaft about said axis and substantially determining the speed at which said apparatus reads data, e. at least one pair of parallel hollow radially extending arms mounted on said shaft, said hollow portions of said shaft communicating with said hollow arms, f. a light permeable opening in each arm of said at least one pair of arms, said openings located functionally opposite each other, one of said openings for focusing light against said at least one record medium, g. optical means for guiding light from said light source entering an open end of said shaft through (i) one of said at least one pair of hollow arms, (ii) said opening in said arm for focusing light against said at least one record medium, (iii) said opening of the other of said at least one pair of hollow arms, (iv) said other hollow arm and (v) out of the other open end of said shaft to said detector, and light from said light source being coaxial with the axis of rotation of said shaft when said light enters an open end of said shaft and when said light exits from the other open end of said shaft, and h. a plurality of bearing means mounting said shaft, said at least one pair of hollow radially extending arms axially located between at least two of said plurality of bearing means.
Claim 3
Dependent Claim
15 words
Apparatus as recited in claim 1 wherein said at least one record medium is transparent.
Claim 4
Dependent Claim
45 words
Apparatus as recited in claim 1 wherein said at least one record medium is a plate extending in a plane perpendicular to said axis of rotation of said shaft, and further comprising drive means for driving said at least one record medium in said plane.
Claim 5
Dependent Claim
19 words
Apparatus as recited in claim 1 wherein a plurality of record media are provided around said shaft for scanning.
Claim 6
Dependent Claim
39 words
Apparatus as recited in claim 4 wherein each record medium is a plate extending in a plane perpendicular to the axis of rotation of said shaft, and further comprising drive means for driving said record media in said plane.
Claim 7
Dependent Claim
285 words
Apparatus for reading data from at least one record medium, said apparatus comprising: a. a light source for optically scanning said at least one record medium, b. a detector for detecting the light projected from said light source acting on said at least one record medium, c. a shaft rotatable about an axis, said shaft being open at one end and having a hollow portion at least in the portion of said shaft adjacent said open end, d. drive means for continuously rotating said shaft about said axis, and substantially determining the speed at which said apparatus reads data, e. at least one hollow radially extending arm mounted on said shaft, said hollow portion of said shaft communicating with said at least one hollow arm, f. a light permeable opening in said arm for focusing light from said light source against said at least one record medium, g. a semi-permeable mirror located in the path of a light beam between said light source and said open end of said shaft, h. optical means for guiding light from said light source entering said open end of said shaft through said at least one hollow arm and said opening in said arm, and then back through said at least one hollow arm and said open end of said shaft, whereby said light extending from from said shaft is reflected by said semi-permeable mirror toward said detector, light from said light source being coaxial with the axis of rotation of said shaft both when said light enters and exits from said open end of said shaft, and i. two bearing means for mounting said shaft, said at least one hollow arm axially located between said two bearing means.
Claim 8
Dependent Claim
285 words
Apparatus for reading data from at least one record medium, said apparatus comprising: a. a light source for optically scanning said at least one record medium, b. a detector for detecting the light projected from said light source acting on said at least one record medium, c. a shaft rotatable about an axis, said shaft being open at one end and having a hollow portion at least in the portion of said shaft adjacent said open end, d. drive means for continuously rotating said shaft about said axis, and substantially determining the speed at which said apparatus reads data, e. at least one hollow radially extending arm mounted on said shaft, said hollow portion of said shaft communicating with said at least one hollow arm, f. a light permeable opening in said arm for focusing light from said light source against said at least one record medium, g. a semi-permeable mirror located in the path of a light beam between said light source and said open end of said shaft, h. optical means for guiding light from said light source entering said open end of said shaft through said at least one hollow arm and said opening in said arm, and then back through said at least one hollow arm and said open end of said shaft, whereby said light extending from from said shaft is reflected by said semi-permeable mirror toward said detector, light from said light source being coaxial with the axis of rotation of said shaft both when said light enters and exits from said open end of said shaft, and i. two bearing means for mounting said shaft, said at least one hollow arm axially located between said two bearing means.
Claim 9
Dependent Claim
15 words
Apparatus as recited in claim 6 wherein said at least one record medium is reflecting.
Claim 10
Dependent Claim
45 words
Apparatus as recited in claim 6 wherein said at least one record medium is a plate extending in a plane perpendicular to said axis of rotation of said shaft, and further comprising drive means for driving said at least one record medium in said plane.
Claim 11
Dependent Claim
19 words
Apparatus as recited in claim 6 wherein a plurality of record media are provided around said shaft for scanning.
Claim 12
Dependent Claim
39 words
Apparatus as recited in claim 9 wherein each record medium is a plate extending in a plane perpendicular to the axis of rotation of said shaft, and further comprising drive means for driving said record media in said plane.
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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) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |