US4593998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic enlarger
Assignee: Novartis AG
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Filing: 1985-02-07
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Granted: 1986-06-10
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Expires: 2005-02-07
Abstract
Abstract A daylight enlarger of the enclosed image framing area type is disclosed and comprises a lamp housing with lamp, lens means and holder for a negative, transparency or the like to be enlarged, and a tunnel body. In order to render the enlarger compact for storage purposes, the lamp housing can be stored in the tunnel body, one end of which can be closed by a viewing screen capable of being removably attached to the end of the tunnel body. A developing easel of the dark slide closable type is also provided to receive material on which an enlargement is to be printed. The easel may be removably attached to the said end of the tunnel body for development purposes after the image has been viewed on the screen and is preferably such that it may also be removably attached to the other end of the tunnel for storage purposes.
Inventors
- 👤 Brian F. Moss
- 👤 Richard J. Brent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:23
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/326
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
189 words
A daylight enlarger of the enclosed image framing area type, comprising a lamp housing for receiving a lamp and lens means and having a location to receive a negative, transparency or the like to be enlarged, an enlarger tunnel body attached to the housing, a viewing area and an image framing area for receiving material on which an enlargement is to be printed; said enlarger tunnel body and the lamp housing being detachably connected to one another with the enlarger tunnel body being divided along its length into two parts which are connectable in a light-tight manner and which are detachable so that said body is capable of containing therein for storage purposes the lamp housing when the latter has been detached from the body; said viewing area being a viewing screen capable of being removably attached to the end of the tunnel body remote from that to which the lamp housing is attachable; and said image framing area being contained within an easel of the dark slide closable type also capable of being removably attached to said end of the tunnel body in place of the viewing screen.
Claim 2
Dependent Claim
189 words
A daylight enlarger of the enclosed image framing area type, comprising a lamp housing for receiving a lamp and lens means and having a location to receive a negative, transparency or the like to be enlarged, an enlarger tunnel body attached to the housing, a viewing area and an image framing area for receiving material on which an enlargement is to be printed; said enlarger tunnel body and the lamp housing being detachably connected to one another with the enlarger tunnel body being divided along its length into two parts which are connectable in a light-tight manner and which are detachable so that said body is capable of containing therein for storage purposes the lamp housing when the latter has been detached from the body; said viewing area being a viewing screen capable of being removably attached to the end of the tunnel body remote from that to which the lamp housing is attachable; and said image framing area being contained within an easel of the dark slide closable type also capable of being removably attached to said end of the tunnel body in place of the viewing screen.
Claim 3
Dependent Claim
42 words
An enlarger as claimed in claim 1, wherein the end of the tunnel body to which the lamp housing is attached is shaped and dimensioned to receive the easel when the lamp housing is contained in the tunnel body for storage purposes.
Claim 4
Dependent Claim
34 words
An enlarger as claimed in claim 1, wherein the lamp housing contains a lamp bulb and means for receiving and connecting in circuit with said bulb, one or more batteries for powering the bulb.
Claim 5
Dependent Claim
19 words
An enlarger as claimed in claim 1, wherein the easel has a dark slide formed of red filter material.
Claim 6
Dependent Claim
61 words
An enlarger as claimed in claim 1, wherein the dark slide has a planar image framing area to receive material on which an enlargement is to be printed, an entry aperture and a conduit leading from said entry aperture to said viewing area, whereby developing liquid may be poured through said aperture on to said viewing area without moving the slide.
References Cited (Backward Citations)
FR381258A
Cited
US1986693A
Cited
US2231395A
Cited
US2634651A
Cited
DE824597C
Cited
FR1285424A
Cited
US3644036A
Cited
DE2643819A1
Cited
US4263000A
Cited
US4303333A
Cited
US4355889A
Cited
GB2137368A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-09 | 1989-12-09 | 1990-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-09 | 1993-12-09 | 1994-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-09 | 1997-12-09 | 1998-06-10 | $7700.00 | Window Closed / Lapsed |