US4281353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for projecting enlarged video images
Assignee: Individual
•
Filing: 1979-01-12
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Granted: 1981-07-28
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Expires: 1999-01-12
Abstract
Abstract An apparatus is provided for receiving the inverted video image of a television set and for enlarging and projecting this image onto a suitable display surface. An adjustable concave mirror, located at a distance from the television set which is dependent upon the size of the enlarged image which is desired, is enclosed in a housing which shields the projected image from being washed out. The housing has a non-reflecting black matte interior finish and an opening through which the image is projected towards the display surface.
Inventors
- 👤 Bifford L. Scarborough, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:11
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3141
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
103 words
Apparatus for projecting an enlarged video image onto a display surface, comprising: a television set adjusted to project an inverted image; a housing having an opening at one end thereof, said television set being located at a bottom portion of the opening and arranged such that the image faces the interior of the housing; a single optical element located within the housing for reflecting the projected image beyond said housing onto the display surface, said optical element comprising a concave parabolic mirror; and means for adjusting said mirror to reflect the image through a top portion of said opening onto the display surface.
Claim 2
Dependent Claim
103 words
Apparatus for projecting an enlarged video image onto a display surface, comprising: a television set adjusted to project an inverted image; a housing having an opening at one end thereof, said television set being located at a bottom portion of the opening and arranged such that the image faces the interior of the housing; a single optical element located within the housing for reflecting the projected image beyond said housing onto the display surface, said optical element comprising a concave parabolic mirror; and means for adjusting said mirror to reflect the image through a top portion of said opening onto the display surface.
Claim 3
Dependent Claim
113 words
Apparatus for projecting an enlarged video image onto a display surface, comprising: a television set adjusted to project an inverted image; a housing provided with a non-reflective black finish on its interior and having an opening at one of its ends; said television set being located at a bottom portion of the opening and arranged such that the image faces the interior of the housing; a single optical element located within the housing for reflecting the projected image beyond said housing onto the display surface, said optical element comprising a concave mirror; and means for adjusting said mirror to reflect the image through a top portion of said opening onto the display surface.
Claim 4
Dependent Claim
113 words
Apparatus for projecting an enlarged video image onto a display surface, comprising: a television set adjusted to project an inverted image; a housing provided with a non-reflective black finish on its interior and having an opening at one of its ends; said television set being located at a bottom portion of the opening and arranged such that the image faces the interior of the housing; a single optical element located within the housing for reflecting the projected image beyond said housing onto the display surface, said optical element comprising a concave mirror; and means for adjusting said mirror to reflect the image through a top portion of said opening onto the display surface.
Claim 5
Dependent Claim
27 words
Apparatus as set forth in claim 2, wherein said housing unit has a generally inverted U-shape and comprises a continuous curved top portion and an end wall.
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) | 1984-07-27 | 1985-01-26 | 1985-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-27 | 1989-01-26 | 1989-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-27 | 1993-01-26 | 1993-07-28 | $7700.00 | Window Closed / Lapsed |