US4163610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rear/remote-screen projector
Assignee: TCI ACQUISITION CORP
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Filing: 1978-11-16
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Granted: 1979-08-07
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Expires: 1998-11-16
Abstract
Abstract A rear/remote-screen projector includes means for alternatively projecting slide images on a remote screen or on a rear screen mounted on the projection housing. The opening of a door in the housing laterally shifts one of the mirrors in the housing without changing the angular orientation thereof thereby allowing the projected image, previously reflected by this mirror to other mirrors and eventually to the integral rear-screen, to pass through the door opening and to a remote screen.
Inventors
- 👤 William R. Sanderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:04
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
229 words
An apparatus for the projection of images contained on slides comprising; a housing; means within said housing for handling said slides; means within said housing for projecting light through said slides along an optical path; a projection screen mounted in one face of said housing; at least one mirror located within said housing for folding said optical path of said apparatus for projecting said slide images on said projection screen; a laterally shiftable frame mounted within said housing; one of said mirrors mounted on said shiftable frame; means for moving said frame between a first position in which said one mirror is in registry with said optical path and a second position in which said one mirror is completely removed from said optical path; said frame extending beyond said one mirror and being formed with an aperture therethrough in a plane intersection said optical path, said aperture being located in said frame such that when said frame is in said second position said aperture is coaxial with said optical path; stop means in cooperation with said frame for establish said first and said second positions thereof; and said housing being formed with an aperture therethrough located adjacent said frame such that when said frame is in said second position said housing aperture is coaxial with said optical path, whereby said slide images may be projected onto a remote screen.
Claim 2
Independent Claim
229 words
An apparatus for the projection of images contained on slides comprising; a housing; means within said housing for handling said slides; means within said housing for projecting light through said slides along an optical path; a projection screen mounted in one face of said housing; at least one mirror located within said housing for folding said optical path of said apparatus for projecting said slide images on said projection screen; a laterally shiftable frame mounted within said housing; one of said mirrors mounted on said shiftable frame; means for moving said frame between a first position in which said one mirror is in registry with said optical path and a second position in which said one mirror is completely removed from said optical path; said frame extending beyond said one mirror and being formed with an aperture therethrough in a plane intersection said optical path, said aperture being located in said frame such that when said frame is in said second position said aperture is coaxial with said optical path; stop means in cooperation with said frame for establish said first and said second positions thereof; and said housing being formed with an aperture therethrough located adjacent said frame such that when said frame is in said second position said housing aperture is coaxial with said optical path, whereby said slide images may be projected onto a remote screen.
Claim 3
Dependent Claim
39 words
The apparatus as set forth in claim 1 which further comprises means for selectively closing said housing aperture whereby when said frame is in said first position extraneous light is prevented from entering said housing through said housing aperture.
Claim 4
Dependent Claim
26 words
The apparatus as set forth in claim 2 wherein said housing aperture closing means comprises the portion of said frame to which said mirrors is mounted.
Claim 5
Dependent Claim
31 words
The apparatus as set forth in claim 3 wherein said frame moving means comprises a handle attached to said frame, said handle extending outwardly from said frame through said housing aperture.
Claim 6
Dependent Claim
22 words
The apparatus as set forth in claim 4 wherein said stop means comprises said handle engaging the sides of said housing aperture.
Claim 7
Dependent Claim
43 words
The apparatus as set forth in claim 1 which further comprises a shroud fitted around said frame aperture and fixed to said frame for channeling said light projected through said slides to said housing aperture when said frame is in said second position.
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) | 1982-08-06 | 1983-02-05 | 1983-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-06 | 1987-02-05 | 1987-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-06 | 1991-02-05 | 1991-08-07 | $7700.00 | Window Closed / Lapsed |