Patent US4245256A successfully refreshed from Google Patents.
US4245256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Video projector and mounting structure
Assignee: Sony Corp
•
Filing: 1979-09-13
•
Granted: 1981-01-13
•
Expires: 1999-09-13
Abstract
Abstract A color video projector as disclosed which includes a cabinet having a depressed top deck, and a mirror carrying L-shape mounting board pivotally carried by a pair of slidably movable arms, guide grooves on the side edges of said top deck and guide pins protruding from the mounting board ride in the guide grooves during withdrawal of the mounting board. The board can only be rocked to its upright position when the arms are fully extended and can only be rocked back to its original position when the arms are fully extended and from which position the mounting board can be pushed back into the cabinet with the mirror above the top deck.
Inventors
- 👤 Takashi Kokubo
- 👤 Yoshiaki Takano
- 👤 Minoru Okuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:27
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3141; H04N5/00; H04N5/74; H04N5/7475; H04N2005/7483
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
154 words
A color video projector comprising a cabinet, said cabinet having a step-like recess including a front upper half surface and a top deck having side edges defining a track along the sides of said top deck, a mounting board of substantially L-shaped, a mirror on the inner surface of said mounting board at a point where it lies over said top deck, a pair of support arms for said mounting board slidably mounted on said track, said mounting board being slidably movable out of and into position over said top deck, said cabinet having means restraining said mounting board from upward movement and from rocking movement except when said mounting board is in a predetermined fully-out position, said mounting board being rockable about the forward end of said support arms, and means for preventing rocking of said mounting board except when said mounting board is in its outer position in front of said cabinet.
Claim 2
Dependent Claim
154 words
A color video projector comprising a cabinet, said cabinet having a step-like recess including a front upper half surface and a top deck having side edges defining a track along the sides of said top deck, a mounting board of substantially L-shaped, a mirror on the inner surface of said mounting board at a point where it lies over said top deck, a pair of support arms for said mounting board slidably mounted on said track, said mounting board being slidably movable out of and into position over said top deck, said cabinet having means restraining said mounting board from upward movement and from rocking movement except when said mounting board is in a predetermined fully-out position, said mounting board being rockable about the forward end of said support arms, and means for preventing rocking of said mounting board except when said mounting board is in its outer position in front of said cabinet.
Claim 3
Dependent Claim
124 words
A video projector for projecting an enlarged image of an image of a cathode ray tube through a path including a mirror onto a screen, a mounting board with a mirror attached thereto being pivotally linked to a pair of movable arms which support and move said mounting board guide grooves on said cabinet, guide pins projecting from said mounting board into said guide grooves, said guide grooves having escape openings for said pins when said mounting board is in its forward position, an engaging latch piece movable in a vertical direction, said engaging latch being pushed in during the closing operation of said mounting board, and means for restraining said mounting board from being raised except when it is in its forward position.
Claim 4
Dependent Claim
124 words
A video projector for projecting an enlarged image of an image of a cathode ray tube through a path including a mirror onto a screen, a mounting board with a mirror attached thereto being pivotally linked to a pair of movable arms which support and move said mounting board guide grooves on said cabinet, guide pins projecting from said mounting board into said guide grooves, said guide grooves having escape openings for said pins when said mounting board is in its forward position, an engaging latch piece movable in a vertical direction, said engaging latch being pushed in during the closing operation of said mounting board, and means for restraining said mounting board from being raised except when it is in its forward position.
Claim 5
Dependent Claim
162 words
A color video projector comprising a cabinet, said cabinet having a step-like recess including a front upper half surface and a top deck having side edges defining a track along the sides of said top deck, a mounting board of substantially L-shape, a mirror on the inner surface of said mounting board at a point where it lies over said top deck when retracted, means for supporting said mounting board for movement from a position over said top deck, to a position in front of said cabinet, means normally confining said mounting board to movement only in a substantially horizontal plane until said mounting board is in its outer position in front of said cabinet, means permitting raising said mounting board and for permitting rocking movement of said mounting board, and means preventing a return movement of said mounting board until its original position is attained with said mounting board lying with its mirror in a plane parallel to said top deck.
Claim 6
Dependent Claim
162 words
A color video projector comprising a cabinet, said cabinet having a step-like recess including a front upper half surface and a top deck having side edges defining a track along the sides of said top deck, a mounting board of substantially L-shape, a mirror on the inner surface of said mounting board at a point where it lies over said top deck when retracted, means for supporting said mounting board for movement from a position over said top deck, to a position in front of said cabinet, means normally confining said mounting board to movement only in a substantially horizontal plane until said mounting board is in its outer position in front of said cabinet, means permitting raising said mounting board and for permitting rocking movement of said mounting board, and means preventing a return movement of said mounting board until its original position is attained with said mounting board lying with its mirror in a plane parallel to said top deck.
Claim 7
Dependent Claim
158 words
A color video projector comprising a cabinet having a step-like recess, including a front upper half recess check and a top surface, a substantially L-shape mounting board having a portion which overlies said recess check where in a non-operational position, a pair of mounting board supporting arms slidably carried by cabinet and mounted for movement in a plane parallel of said top surface, the outer end of each of said arms being linked to said mounting board to support said board, means limiting the outward movement of said arms at a point where said mounting board is in front of said cabinet, a vertically movable latch which normally prevents upward movement of said mounting board until release by the operator, spring means biasing said latch to a position where said mounting board cannot return to its position above said top surface of said cabinet, and a manually adjustable stop which determines the operating position of said mounting boards.
Claim 8
Dependent Claim
158 words
A color video projector comprising a cabinet having a step-like recess, including a front upper half recess check and a top surface, a substantially L-shape mounting board having a portion which overlies said recess check where in a non-operational position, a pair of mounting board supporting arms slidably carried by cabinet and mounted for movement in a plane parallel of said top surface, the outer end of each of said arms being linked to said mounting board to support said board, means limiting the outward movement of said arms at a point where said mounting board is in front of said cabinet, a vertically movable latch which normally prevents upward movement of said mounting board until release by the operator, spring means biasing said latch to a position where said mounting board cannot return to its position above said top surface of said cabinet, and a manually adjustable stop which determines the operating position of said mounting boards.
Claim 9
Dependent Claim
19 words
A color video projector according to claim 4, in which said latch is spring biased to its latched position.
References Cited (Backward Citations)
US2566830A
Cited
US3944734A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-13 | 1984-07-14 | 1985-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-13 | 1988-07-14 | 1989-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-13 | 1992-07-14 | 1993-01-13 | $7700.00 | Window Closed / Lapsed |