Patent US980951A successfully refreshed from Google Patents.
Patent US3634005A successfully refreshed from Google Patents.
US3634005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microfiche reader
Assignee: NCR Voyix Corp
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Filing: 1969-08-21
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Granted: 1972-01-11
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Expires: 1989-08-21
Abstract
Abstract Apparatus for holding a projection lens assembly of a reader in precise position relative to a transparency, the transparency being a platelike film containing a plurality of reduced images thereon. The lens assembly includes a condenser-type lens for magnifying and for projecting the image in an enlargement thereof onto a screen for viewing the enlarged image, the lens assembly being maintained against the surface of a predetermined image plane by reason of a lens-containing tracking sleeve being spring-urged into contact with the image plane. The lens assembly is spaced from a supporting member by ring means surrounding the tracking sleeve, which permits pivotal action at the nodal point of the lens, to maintain the axis of the lens assembly perpendicular to the image plane for all image-projecting positions of the transparency.
Inventors
- 👤 Arnis E Peters
- 👤 Lyle G Miles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:58
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/115
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
94 words
In a microfilm reader having a film holder, a projection lens assembly, a screen for displaying an enlargement of a projected portion of the film, and means for maintaining the lens assembly substantially normal to the film holder, the combination comprising support means adapted to permit the lens assembly to move in a path toward And away from the film holder, and means encircling the lens assembly and spacing the lens assembly from the support means for allowing the lens assembly to pivot in response to variations in the attitude of the microfilm holder.
Claim 2
Dependent Claim
94 words
In a microfilm reader having a film holder, a projection lens assembly, a screen for displaying an enlargement of a projected portion of the film, and means for maintaining the lens assembly substantially normal to the film holder, the combination comprising support means adapted to permit the lens assembly to move in a path toward And away from the film holder, and means encircling the lens assembly and spacing the lens assembly from the support means for allowing the lens assembly to pivot in response to variations in the attitude of the microfilm holder.
Claim 3
Dependent Claim
34 words
The combination of claim 1 wherein the lens assembly includes a tracking sleeve in contact with the film holder and adaptable to move in said path and to pivot in response to said variations.
Claim 4
Dependent Claim
34 words
The combination of claim 1 wherein the support means includes a member spaced from the lens assembly, and a plurality of springs connecting the member and the assembly for permitting movement in said path.
Claim 5
Dependent Claim
28 words
The combination of claim 1 wherein the spacing means is a ring engageable with and separating the lens assembly and the supporting means for permitting the pivotal action.
Claim 6
Dependent Claim
136 words
In combination with a display apparatus having a projection lens for projecting onto a screen an enlargement of microfilm placed in said apparatus, and means for maintaining the projection lens in focus, support means, a projection lens assembly having a lens sleeve, a film carrier spaced from the lens and adapted to present a surface substantially normal to the axis of the lens, a tracking sleeve containing the lens sleeve and positioned in contactual relationship with the film carrier surface, means urging the tracking sleeve into contact with the surface, the lens sleeve being adaptable to slidably move within the tracking sleeve in response to variations in the positioning of the film carrier surface, and means encircling the projection lens assembly for permitting pivotal movement of the projection lens assembly in relation to the support means.
Claim 7
Dependent Claim
136 words
In combination with a display apparatus having a projection lens for projecting onto a screen an enlargement of microfilm placed in said apparatus, and means for maintaining the projection lens in focus, support means, a projection lens assembly having a lens sleeve, a film carrier spaced from the lens and adapted to present a surface substantially normal to the axis of the lens, a tracking sleeve containing the lens sleeve and positioned in contactual relationship with the film carrier surface, means urging the tracking sleeve into contact with the surface, the lens sleeve being adaptable to slidably move within the tracking sleeve in response to variations in the positioning of the film carrier surface, and means encircling the projection lens assembly for permitting pivotal movement of the projection lens assembly in relation to the support means.
Claim 8
Dependent Claim
33 words
The combination of claim 5 wherein the support means includes a member surrounding the tracking sleeve and the urging means includes a plurality of leaf springs connecting said member and said lens assembly.
Claim 9
Dependent Claim
25 words
The combination of claim 5 wherein said pivotal movement permitting means comprises a ring separating the tracking sleeve and the support means in spaced relationship.
Claim 10
Dependent Claim
22 words
The combination of claim 7 wherein said ring is an O-ring of resilient material positioned along the nodal plane of the lens.
Claim 11
Dependent Claim
169 words
In a microform reader having a frame supporting a film holder, a screen, and a projection lens assembly, said assembly being positioned between the holder and the screen, and means for maintaining the lens in a focused condition, the improvement comprising a lens assembly support member, the lens assembly having a lens sleeve for containing the lens and a tracking sleeve surrounding the lens sleeve, the lens sleeve being adaptable to slidably move within the tracking sleeve toward and away from the film holder, a ring separating the tracking sleeve and the support member for permitting limited pivotal movement of the tracking sleeve in relation to the film holder, spring means urging the tracking sleeve into continuous contact with the film holder, and adjusting means connected with the lens sleeve and with the reader frame for changing the distance between the lens and the film holder, the adjusting means including a yieldable portion and the connection being independent of the urgence of the spring means on the tracking sleeve.
Claim 12
Dependent Claim
169 words
In a microform reader having a frame supporting a film holder, a screen, and a projection lens assembly, said assembly being positioned between the holder and the screen, and means for maintaining the lens in a focused condition, the improvement comprising a lens assembly support member, the lens assembly having a lens sleeve for containing the lens and a tracking sleeve surrounding the lens sleeve, the lens sleeve being adaptable to slidably move within the tracking sleeve toward and away from the film holder, a ring separating the tracking sleeve and the support member for permitting limited pivotal movement of the tracking sleeve in relation to the film holder, spring means urging the tracking sleeve into continuous contact with the film holder, and adjusting means connected with the lens sleeve and with the reader frame for changing the distance between the lens and the film holder, the adjusting means including a yieldable portion and the connection being independent of the urgence of the spring means on the tracking sleeve.
Claim 13
Dependent Claim
17 words
The microfilm reader in accordance with claim 9 wherein the ring is an O-ring of resilient material.
Claim 14
Dependent Claim
125 words
An image-tracking system for a reader having a screen, a projection lens, and a film holder containing a film sheet with a plurality of microimages thereon, including a tracking sleeve, a lens sleeve slidably supported in the tracking sleeve, a support member positioned to contain the tracking sleeve substantially normal to the film holder, means connecting the support member and the tracking sleeve to allow the sleeve to move toward and away from the film holder, and means encircling the tracking sleeve and spacing the support member from the tracking sleeve to permit piVoting of the tracking sleeve to maintain the lens in focused condition as the film holder is moved in relation to the lens to select an image to display on the screen.
Claim 15
Dependent Claim
125 words
An image-tracking system for a reader having a screen, a projection lens, and a film holder containing a film sheet with a plurality of microimages thereon, including a tracking sleeve, a lens sleeve slidably supported in the tracking sleeve, a support member positioned to contain the tracking sleeve substantially normal to the film holder, means connecting the support member and the tracking sleeve to allow the sleeve to move toward and away from the film holder, and means encircling the tracking sleeve and spacing the support member from the tracking sleeve to permit piVoting of the tracking sleeve to maintain the lens in focused condition as the film holder is moved in relation to the lens to select an image to display on the screen.
Claim 16
Dependent Claim
27 words
The image-tracking system in accordance with claim 11 wherein the means connecting the support member and the tracking sleeve is a plurality of equally spaced leaf springs.
Claim 17
Dependent Claim
23 words
The image tracking system in accordance with claim 11 wherein the spacing means is an O-ring surrounding the tracking sleeve in contact therewith.
Claim 18
Dependent Claim
111 words
In a microform reader having a form holder, a projection lens assembly including a tracking sleeve in contact with the form holder, a screen for displaying an enlargement of a projected portion of the form, and means for maintaining the lens assembly substantially normal to the form holder, the combination comprising support means adapted to permit the lens assembly and the tracking sleeve to move in a path toward and away from the form holder, and means spacing the lens assembly and the tracking sleeve from the support means for allowing the lens assembly and the tracking sleeve to pivot in response to variations in the attitude of the microform holder.
Claim 19
Dependent Claim
111 words
In a microform reader having a form holder, a projection lens assembly including a tracking sleeve in contact with the form holder, a screen for displaying an enlargement of a projected portion of the form, and means for maintaining the lens assembly substantially normal to the form holder, the combination comprising support means adapted to permit the lens assembly and the tracking sleeve to move in a path toward and away from the form holder, and means spacing the lens assembly and the tracking sleeve from the support means for allowing the lens assembly and the tracking sleeve to pivot in response to variations in the attitude of the microform holder.
Claim 20
Dependent Claim
35 words
The combination of claim 14 wherein the spacing means is positioned in relation to the lens assembly for allowing the lens assembly to pivot about a plane through the lens in response to said variations.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |