US4092064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projectors
Assignee: Realist Inc
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Filing: 1976-06-11
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Granted: 1978-05-30
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Expires: 1996-06-11
Abstract
Abstract The portable projector has a drawer which is pulled forward for use and to gain access to the opal glass rear projection screen which is inserted into the slot in the front of the drawer. The projection lens is removed from its storage compartment in the drawer and threaded into the optical housing after it has been pivoted to its upright position. A selected microfiche is inserted in the slot between the optical housing and the lensboard and is retained in selected position by friction from velour facings in the slot. The bulb is low voltage, low power to permit use of battery power or line voltage through a transformer. If the opal glass is not used, the image can be projected on a light colored surface within the limitations of the bulb intensity and ambient light.
Inventors
- 👤 Jean-Pierre Puel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:12
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
204 words
A projector comprising a case having an upper surface provided with an aperture therein originating at the rear portion thereof and extending forwardly along the centerline of said surface and having smaller length and width than the surface, an optical housing pivotally connected to the upper rear portion of the case for movement between an erect position and a folded position in which it is received in and closes said aperture and in conjunction with said upper surface forms the top of the case, a lens mounted in said housing when the housing is in said erect position and stored in the case when the housing is in folded position, a projection screen, means for supporting the screen normal to the projection axis, said means comprising a drawer slidably mounted in the lower portion of the case for movement between a first position in which it forms the bottom of the case and an extended position in which the front of the drawer is positioned substantially in front of the front of the case, and an upwardly opening slot in the front of the drawer to receive said projection screen, a light source in said housing; and a power supply for the light source.
Claim 2
Dependent Claim
204 words
A projector comprising a case having an upper surface provided with an aperture therein originating at the rear portion thereof and extending forwardly along the centerline of said surface and having smaller length and width than the surface, an optical housing pivotally connected to the upper rear portion of the case for movement between an erect position and a folded position in which it is received in and closes said aperture and in conjunction with said upper surface forms the top of the case, a lens mounted in said housing when the housing is in said erect position and stored in the case when the housing is in folded position, a projection screen, means for supporting the screen normal to the projection axis, said means comprising a drawer slidably mounted in the lower portion of the case for movement between a first position in which it forms the bottom of the case and an extended position in which the front of the drawer is positioned substantially in front of the front of the case, and an upwardly opening slot in the front of the drawer to receive said projection screen, a light source in said housing; and a power supply for the light source.
Claim 3
Dependent Claim
25 words
A projector according to claim 1 in which the optical housing includes means receiving and retaining a microfiche in desired position in the film stage.
Claim 4
Dependent Claim
42 words
A projector according to claim 1 including a support stand pivoted to the underside of the drawer for movement between a storage position flat against the underside and a use position in which it functions to elevate the front of the projector.
Claim 5
Dependent Claim
26 words
A projector according to claim 1 in which the interior dimensions of the drawer are adequate to receive said screen and a plurality of microfiche cards.
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) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |