US3938191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary data base with air bearing
Assignee: CAE Link Corp
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Filing: 1974-08-21
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Granted: 1976-02-10
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Expires: 1994-08-21
Abstract
Abstract A document containing analog data is vacuum retained on a transparent rotating drum. A data illumination head and a light responsive reading head are mounted on a carriage which moves parallel to the axis of rotation. The heads transversely scan the existing analog data as the drum rotates generating a digital new data base. The carriage is supported on air bearings that constrain movement in pitch, yaw and roll, and is driven by a precision lead screw. The sample rate of the read head is controlled by a step accumulator in response to a shaft encoder which monitors the drum rotation.
Inventors
- 👤 Howard I. Jarmy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:59
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/06; H04N1/0671; H04N1/0678; G; G11; G11B; G11B7/00; G11B7/002; G11B7/0025; H04N1/0657; H04N2201/00; H04N2201/04; H04N2201/0402; H04N2201/0404
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
149 words
A system for reading an original data base and new data base, comprising: an annular member adapted to retain the original data base; means for rotatably supporting the annular member; rotary drive for turning the annular member on the bearing means about an axis of rotation; scanning member for illuminating and reading the original data base; traverse drive for establishing relative traverse motion between the members parallel to the axis of rotation by moving at least one of the members; guide means for retaining the members in parallel relationship during the traverse motion; drive controller for coordinating the rotary drive and traverse drive to scan the desired area of the original data base and establish the desired format of the new data base; and air bearing means for spacing the traversely movable member from the guide means during the traverse motion for reducing the friction and vibration coupling therebetween.
Claim 2
Independent Claim
149 words
A system for reading an original data base and new data base, comprising: an annular member adapted to retain the original data base; means for rotatably supporting the annular member; rotary drive for turning the annular member on the bearing means about an axis of rotation; scanning member for illuminating and reading the original data base; traverse drive for establishing relative traverse motion between the members parallel to the axis of rotation by moving at least one of the members; guide means for retaining the members in parallel relationship during the traverse motion; drive controller for coordinating the rotary drive and traverse drive to scan the desired area of the original data base and establish the desired format of the new data base; and air bearing means for spacing the traversely movable member from the guide means during the traverse motion for reducing the friction and vibration coupling therebetween.
Claim 3
Dependent Claim
37 words
The system of claim 1, wherein the air bearing means has a vertical component for lifting the traversely movable member and a lateral component for maintaining the spacing between the traversely movable member and the guide means.
Claim 4
Dependent Claim
68 words
The system of claim 2, wherein the guide means define a generally horizontal surface and two spaced non horizontal surfaces; and the vertical component is provided by air pads mounted on the traversely movable member downwardly directed against the horizontal guide surface, and the lateral component is provided by opposed air pads mounted on the traversely movable member and directed sideways against the spaced non horizontal guide surfaces.
Claim 5
Dependent Claim
26 words
The system of claim 3, wherein the air, pressures in the downwardly directed air pads are adjustable to provide height positioning of the traversely movable member.
Claim 6
Dependent Claim
27 words
The system of claim 4, wherein the air pressures in the downwardly directed air pads are differentially adjustable to provide pitch positioning of the traversely movable member.
Claim 7
Dependent Claim
27 words
The system of claim 4, wherein the air pressure in the downwardly directed air pads are differentially adjustable to provide roll positioning of the traversely movable member.
Claim 8
Dependent Claim
35 words
The system of claim 2, wherein the traverse drive moves the scanning member traversely in step increments between rotor scans, and the air bearing reduces mechanical disturbance incident to each stop by minimizing standing friction.
Claim 9
Dependent Claim
57 words
The system of claim 7, wherein the traverse drive comprises: a threaded lead member; means for turning the lead member; a threaded rider means mounted on the lead member which abuttingly engages the scanning member, and is displaced along the lead member as the lead member is turned for establishing the traverse motion of the scanning member.
Claim 10
Dependent Claim
30 words
the system of claim 8, wherein the means for turning the lead member is a stepping motor for displacing the threaded rider means a predetermined amount for each motor step.
Claim 11
Dependent Claim
38 words
The system of claim 9, wherein a cable with one end wound on a constant torque spool is secured at the other end to the scanning member for urging the scanning member into contact with the threaded rider.
Claim 12
Dependent Claim
33 words
The system of claim 10, wherein the cable extends parallel to the direction of traverse motion along the center line of the scan member to avoid developing turning moments in the scanning member.
Claim 13
Dependent Claim
85 words
The system of claim 7, wherein the annular member is light transparent and is hollow having an inside surface and an outside surface, one surface of which is adapted to retain the original data base; the scanning member has an inside arm extending into the annular member for scanning the inside surface and an outside arm for scanning the outside surface; and an illumination head is head mounted on one of the arms and a light sensor reading head is mounted on the other arm.
Claim 14
Dependent Claim
36 words
The system of claim 12, wherein the outside surface is adapted to retain the original data base, the illumination head is mounted on the outside arm, and the reading head is mounted on the inside arm.
Claim 15
Dependent Claim
114 words
The system of claim 3, wherein: the annular member is a light transparent hollow cylinder; the scanning member comprises: an inner support extending into the interior of the hollow cylinder proximate the inside surface thereof, an outer support extending proximate the outside surface of the cylinder, a light source device mounted on one of the supports for illuminating the hollow cylinder, and a light sensitive device mounted on the other one of the supports; the scanning member is traversely movable and adjustable in pitch, yaw, and roll orientation to position the light device relative to the hollow cylinder and to maintain the traverse motion parallel to the axis of rotation of the hollow cylinder.
Claim 16
Dependent Claim
47 words
The system of claim 14, wherein the bearing means include end means at each end of the hollow cylinder, and further include shoe means for engaging the hollow cylinder which shoes are position adjustable for adjusting the tilt or pitch and yaw orientation of the hollow cylinder.
Claim 17
Dependent Claim
37 words
The system of claim 14, wherein the hollow cylinder includes selectively positioned double eccentric registration pins adapted to engage registration slots on the original data base for properly orientating the original data base on the hollow cylinder.
Claim 18
Dependent Claim
57 words
The system of claim 14, wherein the light source device provides a spot of light which is modulated by the original data base and then detected by the light sensitive device, and which spot is incident on the surface of the hollow cylinder proximate the intersection of the pitch axis, the yaw axis, and the roll axis.
Claim 19
Dependent Claim
26 words
The system of claim 4, wherein the air pressure in the laterally directed air pads is adjustable to provide yaw positioning of the traversely movable member.
Claim 20
Dependent Claim
21 words
The system of claim 4, wherein the air pads are swivel-mounted to maintain a close clearance with the adjacent guide surfaces.
Claim 21
Dependent Claim
26 words
The system of claim 4, wherein the downwardly directed air pads are adjustable in extension to provide pitch and roll positioning of the traversely movable member.
Claim 22
Dependent Claim
25 words
The system of claim 4, wherein the laterally directed air pads are adjustable in extension to establish a close clearance with the adjacent guide surfaces.
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) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |