US3817612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microfilm reading apparatus
Assignee: Agfa Gevaert AG
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Filing: 1972-12-15
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Granted: 1974-06-18
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Expires: 1992-12-15
Abstract
Abstract A microfilm reading apparatus wherein the projection lens or lenses are mounted in the housing behind the front wall at a level above one or more microform holders which are movable in horizontal planes to place selected portions of microforms therein into register with the single lens or with one of several lenses. The outwardly extending portions of the holders rest on a supporting device which resembles a U-shaped yoke and has two parallel legs slidably mounted in the housing and one or more webs (one for each holder) which extend between the legs and are parallel to the front wall of the housing. Each holder has a prop which slidably engages the respective web whereby the webs insure that the respective holders maintain their microforms in planes which are normal to the optical axis or axes of the projection lens(es). The legs and/or the web or webs of the supporting device may be provided with graduations to facilitate the placing of selected portions of microforms into register with the lens or lenses by moving the web or webs with the holder or holders toward or away from the front wall of the housing and/or by moving the holder or holders lengthwise of the respective web or webs. Those portions of the housing, holder(s), prop(s) and supporting device which move relative to each other may consist of or may be coated with a synthetic plastic material having a low coefficient of friction (such as ''''Teflon'''').
Inventors
- 👤 K Ambraschka
- 👤 A Maier
- 👤 J Pfeifer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:45
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10; G03B21/11; G03B21/115; G03B21/116
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
136 words
In a microfilm reading apparatus, a combination comprising a housing; at least one projection lens mounted in said housing; at least one microform holding device mounted in and movable relative to said housing between a plurality of positions to thereby place selected portions of a microform therein into register with said lens, a portion of said holding device extending from said housing in at least one of said plurality of positions; and a supporting device for said portion of said holdIng device, said supporting device comprising a substantially U-shaped yoke having two parallel legs slidably mounted in said housing and a web extending between said legs, said yoke being movable relative to said housing to and from at least one operative position in which said web provides a rest for said portion of said holding device.
Claim 2
Dependent Claim
136 words
In a microfilm reading apparatus, a combination comprising a housing; at least one projection lens mounted in said housing; at least one microform holding device mounted in and movable relative to said housing between a plurality of positions to thereby place selected portions of a microform therein into register with said lens, a portion of said holding device extending from said housing in at least one of said plurality of positions; and a supporting device for said portion of said holdIng device, said supporting device comprising a substantially U-shaped yoke having two parallel legs slidably mounted in said housing and a web extending between said legs, said yoke being movable relative to said housing to and from at least one operative position in which said web provides a rest for said portion of said holding device.
Claim 3
Dependent Claim
22 words
A combination as defined in claim 1, further comprising propping means provided between said portion of said holding device and said web.
Claim 4
Dependent Claim
36 words
A combination as defined in claim 1, wherein said holding device comprises a frame and said housing is provided with a supporting surface below said frame, said frame having runner means slidably engaging said supporting surface.
Claim 5
Dependent Claim
41 words
A combination as defined in claim 3, wherein said frame is of rectangular shape and comprises a rear edge portion normally located in the interior of said housing, said runner means being provided on said rear edge portion of said frame.
Claim 6
Dependent Claim
31 words
A combination as defined in claim 1, wherein said housing is provided with a ribbed supporting surface for said holding device and said holding device is slidable along said supporting surface.
Claim 7
Dependent Claim
56 words
A combination as defined in claim 1, wherein said housing and said holding device comprise adjacent portions and said last mentioned portion of said holding device is slidable along said portion of said housing, at least one of said last mentioned portions consisting at least in part synthetic plastic material having a low coefficient of friction.
Claim 8
Dependent Claim
59 words
A combination as defined in claim 1, wherein said housing and said holding device comprise adjacent portions and said last mentioned portion of said holding device is slidable along said portion of said housing, at least one of said last mentioned portions being provided with an external layer consisting of synthetic plastic material having a low cofficient of friction.
Claim 9
Dependent Claim
51 words
A combination as defined in claim 1, wherein said housing and said supporting device comprise adjacent portions and said portion of said supporting device includes said legs, at least one of said last mentioned portions consisting at least in part of a synthetic plastic material having a low coefficient of friction.
Claim 10
Dependent Claim
43 words
A combination as defined in claim 1, wherein said portion of said holding device includes a propping device movable along said web, at least one of said propping and supporting devices consisting of a synthetic plastic material having a low coefficient of friction.
Claim 11
Dependent Claim
160 words
In a microfilm reading apparatus, a combination comprising a housing; at least one projection lens mounted in said housing; at least one microform holding device mounted in and movable relative to said housing between a plurality of positions to thereby place selected portions of the microform therein into register with said lens, a portion of said holding device extending from said housing in at least one of said plurality of positions; a supporting device for said portion of said holding device, said supporting device comprising a substantially U-shaped yoke having a pair of legs movably mounted in said housing and a web extending between said legs, said yoke being movable relative to said housing to and from at least one operative position in which said web provides a rest for said portion of said holding device; and a propping device provided on said portion of said holding device and having a lower end portion straddling a portion of said web.
Claim 12
Dependent Claim
160 words
In a microfilm reading apparatus, a combination comprising a housing; at least one projection lens mounted in said housing; at least one microform holding device mounted in and movable relative to said housing between a plurality of positions to thereby place selected portions of the microform therein into register with said lens, a portion of said holding device extending from said housing in at least one of said plurality of positions; a supporting device for said portion of said holding device, said supporting device comprising a substantially U-shaped yoke having a pair of legs movably mounted in said housing and a web extending between said legs, said yoke being movable relative to said housing to and from at least one operative position in which said web provides a rest for said portion of said holding device; and a propping device provided on said portion of said holding device and having a lower end portion straddling a portion of said web.
Claim 13
Dependent Claim
29 words
A combination as defined in claim 10, wherein said lower end portion of said propping device is movable lengthwise of said web and surrounds said web from three sides.
Claim 14
Dependent Claim
20 words
A combination as defined in claim 10, wherein said lower end portion of said propping device clampingly engages said web.
Claim 15
Dependent Claim
169 words
In a microfilm reading apparatus, a combination comprising a housing; at least one projection lens mounted in said housing; first and second microform holding devices mounted in and movable relative to said housing between a plurality of positions to theReby place selected portions of the microform therein into register with said lens, a portion of each of said holding devices extending from said housing in at least one of said plurality of positions of the respective holding device, said second holding device being disposed in a plane which is parallel with and adjacent to the plane of said first holding device; and a supporting device for said portions of said holding devices, said supporting device comprising two legs movably mounted in said housing and first and second webs extending between said legs, said supporting device being movable relative to said housing to and from at least one operative position in which said first and second webs respectively provide rests for said portions of said first and second holding devices.
Claim 16
Dependent Claim
169 words
In a microfilm reading apparatus, a combination comprising a housing; at least one projection lens mounted in said housing; first and second microform holding devices mounted in and movable relative to said housing between a plurality of positions to theReby place selected portions of the microform therein into register with said lens, a portion of each of said holding devices extending from said housing in at least one of said plurality of positions of the respective holding device, said second holding device being disposed in a plane which is parallel with and adjacent to the plane of said first holding device; and a supporting device for said portions of said holding devices, said supporting device comprising two legs movably mounted in said housing and first and second webs extending between said legs, said supporting device being movable relative to said housing to and from at least one operative position in which said first and second webs respectively provide rests for said portions of said first and second holding devices.
Claim 17
Dependent Claim
55 words
A combination as defined in claim 13, wherein said housing comprises a front wall and said webs are parallel with and located in front of said front wall in the operative position of said supporting device, and further comprising two discrete propping devices each extending between one of said webs and the respective holding device.
Claim 18
Dependent Claim
167 words
In a microfilm reading apparatus, a combination comprising a housing; at least one projection lens mounted in said housing; at least one microform holding device mounted in and movable relative to said housing between a plurality of positions to thereby place selected portions of the microform therein into register with said lens, a portion of said holding device extending from said housing in at least one of said plurality of positions; and a supporting device for said portion of said holding device, said supporting device comprising a U-shaped yoke having two legs movably mounted in said housing and a web extending between said legs and provided with graduations, said yoke being movable relative to said housing to and from at least one operative position in which said web provides a rest for said portion of said holding device, said holding device being movable lengthwise of said web and comprising a propping device slidably engaging said web and having index means for pinpointing selected graduations on said web.
Claim 19
Dependent Claim
167 words
In a microfilm reading apparatus, a combination comprising a housing; at least one projection lens mounted in said housing; at least one microform holding device mounted in and movable relative to said housing between a plurality of positions to thereby place selected portions of the microform therein into register with said lens, a portion of said holding device extending from said housing in at least one of said plurality of positions; and a supporting device for said portion of said holding device, said supporting device comprising a U-shaped yoke having two legs movably mounted in said housing and a web extending between said legs and provided with graduations, said yoke being movable relative to said housing to and from at least one operative position in which said web provides a rest for said portion of said holding device, said holding device being movable lengthwise of said web and comprising a propping device slidably engaging said web and having index means for pinpointing selected graduations on said web.
Claim 20
Dependent Claim
38 words
A combination as defined in claim 15, wherein said propping device comprises a lower end portion which separably engages said web and said index means comprises a window provided in said lower end portion of said propping device.
Claim 21
Dependent Claim
180 words
In a microfilm reading apparatus, a combination comprising a housing; at least one projection lens mounted in said housing; at least one microform holding device mounted in and movable relative to said housing between a plurality of positions to thereby place selected portions of the microform therein into register with said lens, a portion of said holding device extending from said housing in at least one of said plurality of positions; a supporting device for said portion of said holding device, said supporting device comprising a U-shaped yoke having two parallel legs movably mounted in said housing and a web extending between said legs, at least said web of said yoke being provided with graduations and said yoke being movable relative to said housing to and from at least one operative position in which said web provides a rest for said portion of said holding device; and a propping device secured to said portion of said holding device and movable lengthwise of said web whereby said graduations indicate the selected position of said holding device relative to said projection lens.
Claim 22
Dependent Claim
180 words
In a microfilm reading apparatus, a combination comprising a housing; at least one projection lens mounted in said housing; at least one microform holding device mounted in and movable relative to said housing between a plurality of positions to thereby place selected portions of the microform therein into register with said lens, a portion of said holding device extending from said housing in at least one of said plurality of positions; a supporting device for said portion of said holding device, said supporting device comprising a U-shaped yoke having two parallel legs movably mounted in said housing and a web extending between said legs, at least said web of said yoke being provided with graduations and said yoke being movable relative to said housing to and from at least one operative position in which said web provides a rest for said portion of said holding device; and a propping device secured to said portion of said holding device and movable lengthwise of said web whereby said graduations indicate the selected position of said holding device relative to said projection lens.
Claim 23
Dependent Claim
171 words
In a microfilm reading apparatus, a combination comprising a housing; at least one projection lens mounted in said housing; at least one microform holding device mounted in and movable relative to said housing between a plurality of positions to thereby place selected portions of the microform therein into register with said lens, a portion of said holding device extending from said housing in at least one of said plurality of positions; and a supporting device for said portion of said holding device, said supportIng device comprising a U-shaped yoke having two parallel legs movably mounted in said housing and a web extending between said legs, said yoke being movable relative to said housing to and from at least one operative position in which said web provides a rest for said portion of said holding device and said holding device being movable in the longitudinal direction of said legs, at least one of said legs being provided with graduations to facilitate the positioning of said holding device relative to said projection lens.
Claim 24
Dependent Claim
171 words
In a microfilm reading apparatus, a combination comprising a housing; at least one projection lens mounted in said housing; at least one microform holding device mounted in and movable relative to said housing between a plurality of positions to thereby place selected portions of the microform therein into register with said lens, a portion of said holding device extending from said housing in at least one of said plurality of positions; and a supporting device for said portion of said holding device, said supportIng device comprising a U-shaped yoke having two parallel legs movably mounted in said housing and a web extending between said legs, said yoke being movable relative to said housing to and from at least one operative position in which said web provides a rest for said portion of said holding device and said holding device being movable in the longitudinal direction of said legs, at least one of said legs being provided with graduations to facilitate the positioning of said holding device relative to said projection lens.
Claim 25
Dependent Claim
257 words
In a microfilm reading apparatus, a combination comprising a housing; at least one projection lens mounted in said housing; at least one microform holding device mounted in and movable relative to said housing between a plurality of positions to thereby place selected portions of the microform therein into register with said lens, a portion of said holding device extending from said housing in at least one of said plurality of positions; and a supporting device for said portion of said holding device, said supporting device comprising a U-shaped yoke having a pair of parallel legs movably mounted in said housing and a web extending between and at right angles to said legs, said yoke being movable relative to said housing to and from at least one operative position in which said web provides a rest for said portion of said holding device, said web and at least one of said legs being provided with graduations in the form of notches and said holding device being movable in the longitudinal direction of said web and of said legs and having a propping device slidably engaging said web, said propping device having detent means arranged to extend into a selected graduation of said web to thereby yieldably hold said holding device in a selected position relative to said web, said legs being movable lengthwise into and from said housing and said housing comprising detent means arranged to enter a selected graduation of said one leg to thereby yieldably hold said yoke in a selected position relative to said housing.
Claim 26
Dependent Claim
257 words
In a microfilm reading apparatus, a combination comprising a housing; at least one projection lens mounted in said housing; at least one microform holding device mounted in and movable relative to said housing between a plurality of positions to thereby place selected portions of the microform therein into register with said lens, a portion of said holding device extending from said housing in at least one of said plurality of positions; and a supporting device for said portion of said holding device, said supporting device comprising a U-shaped yoke having a pair of parallel legs movably mounted in said housing and a web extending between and at right angles to said legs, said yoke being movable relative to said housing to and from at least one operative position in which said web provides a rest for said portion of said holding device, said web and at least one of said legs being provided with graduations in the form of notches and said holding device being movable in the longitudinal direction of said web and of said legs and having a propping device slidably engaging said web, said propping device having detent means arranged to extend into a selected graduation of said web to thereby yieldably hold said holding device in a selected position relative to said web, said legs being movable lengthwise into and from said housing and said housing comprising detent means arranged to enter a selected graduation of said one leg to thereby yieldably hold said yoke in a selected position relative to said housing.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |