US3801199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image projection system with filmstrip cassette
Assignee: Individual
•
Filing: 1972-01-10
•
Granted: 1974-04-02
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Expires: 1992-01-10
Abstract
Abstract An image projection system with fiber optics pivotally mounted to engage a filmstrip cassette in a light coupling position is described. A film engagement mechanism for advancing the filmstrip is contained within the cassette and is responsive to a projector mounted activating mechanism.
Inventors
- 👤 R Kaye
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:51
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/321; G03B21/323; G03B21/325; G03B21/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
195 words
An image projection system for projecting visual images from a filmstrip, comprising: a filmstrip cassette with a filmstrip advanceably disposed therein, said filmstrip having a series of spaced perforations entirely therealong; a base with receiving means affixed thereto for receiving said cassette; reciprocating arm horizontally movably disposed in said cassette beneath and essentially parallel to a portion of said filmstrip and biased in one direction; a finger projecting upward from said arm and disposed thereon beneath said portion of said filmstrip to engage one of said perforations when said arm is moved in a film advancing direction; illuminating means mounted on said base for illuminating said filmstrip; light directing means mounted on said base to couple light from said illuminating means onto said filmstrip, said light directing means being switchable from a passive position to a light coupling position upon insertion of said cassette into said receiving means and from said light coupling position to said passive position upon removal of said cassette; activating means associated with said base for activating said reciprocating arm and advancing said filmstrip; and optical focusing means for focusing said visual images from said illuminated filmstrip onto a viewing surface.
Claim 2
Dependent Claim
195 words
An image projection system for projecting visual images from a filmstrip, comprising: a filmstrip cassette with a filmstrip advanceably disposed therein, said filmstrip having a series of spaced perforations entirely therealong; a base with receiving means affixed thereto for receiving said cassette; reciprocating arm horizontally movably disposed in said cassette beneath and essentially parallel to a portion of said filmstrip and biased in one direction; a finger projecting upward from said arm and disposed thereon beneath said portion of said filmstrip to engage one of said perforations when said arm is moved in a film advancing direction; illuminating means mounted on said base for illuminating said filmstrip; light directing means mounted on said base to couple light from said illuminating means onto said filmstrip, said light directing means being switchable from a passive position to a light coupling position upon insertion of said cassette into said receiving means and from said light coupling position to said passive position upon removal of said cassette; activating means associated with said base for activating said reciprocating arm and advancing said filmstrip; and optical focusing means for focusing said visual images from said illuminated filmstrip onto a viewing surface.
Claim 3
Dependent Claim
121 words
The system claimed in claim 1 wherein: said finger has a triangular profile with a film engaging first side which forms an angle with said horizontal arm no greater than 90* and a second side which forms an angle with the horizontal arm of greater than 90*; and said activating means comprises a solenoid responsive to an electrical signal, said solenoid being mounted on said base to communicate longitudinally with said arm upon introduction of said signal, said arm being moved along its longitudinal axis thereby and said finger engaging said perforation as a result thereof to engage and advance said filmstrip one frame, said bias returning said arm and removing said finger from said perforation after said filmstrip is advanced.
Claim 4
Dependent Claim
20 words
The system claimed in claim 2 wherein said angle between said second side and said horizontal arm is essentially 135*.
Claim 5
Dependent Claim
45 words
The system claimed in claim 3 wherein said portion of said filmstrip rests on the apex of said triangularly profiled finger prior to said engagement of said perforation by said finger and descends to said arm during said engagement of said perforation by said finger.
Claim 6
Dependent Claim
73 words
The system claimed in claim 4 wherein said cassette further comprises: a housing having an aperture in one face thereof, the size of said aperture being essentially that of one frame of said filmstrip, the plane of said aperture forming an acute angle with the vertical; a removable wall; and alignment means included in said housing for maintaining the plane of said filmstrip in essentially parallel alignment with the plane of said aperture.
Claim 7
Dependent Claim
66 words
The system claimed in claim 4 wherein: said bias is a spring; and said solenoid comprises a moving member whose length is disposed along said longitudinal axis in end-to-end communication with said arm, said moving member being responsive to said electrical signal and urging said arm against said spring upon introduction of said signal, said spring reciprocating said arm thereafter and returning said moving member thereby.
Claim 8
Dependent Claim
78 words
The system claimed in claim 4 wherein: said illuminating means comprises a light source and a condenser which focuses light from said source onto said light directing means; and said light directing means comprises a bundle of optical fibers affixed to a pivotable platform which engages the front of said cassette when said cassette is received by said receiving means and which engages an intermediary point of said cassette as said cassette is withdrawn from said receiving means.
Claim 9
Dependent Claim
56 words
The system claimed in claim 7 wherein said platform comprises a first projecting member which is engaged by the front of said cassette when said cassette is received by said receiving means, and a second projecting member which is engaged by an intermediary point of said cassette as said cassette is withdrawn from said receiving means.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |