Patent US3628856A successfully refreshed from Google Patents.
US3628856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filmstrip adapter for slide projectors
Assignee: Eastman Kodak Co
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Filing: 1969-02-10
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Granted: 1971-12-21
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Expires: 1989-02-10
Abstract
Abstract A slide projector adapter for showing still pictures from a filmstrip includes a film gate and a drive sprocket adjacent the film gate. The adapter may be used to show long or short films, with or without leaders. The filmstrip is fed from a molded supply spool to a spring-biased takeup spool. A condenser tube is aligned with the film gate for insertion into the light projecting tube of the projector. The adapter is held in such a manner that it can be rotated to accommodate either horizontal or vertical film formats. A film advance mechanism includes a device for precisely framing the initial projected image.
Inventors
- 👤 Vernon H Jungjohann
- 👤 Henry S Adamski
- 👤 Stephen M Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:37
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/08; G03B23/12; Y; Y10; Y10S; Y10S353/00; Y10S353/02
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
183 words
A device for advancing and aligning a strip of film in a filmstrip projector, said device comprising: a. a housing having 1. a first wall, and 2. a second wall intersecting said first wall and normal thereto; b. means on said first wall defining a film gate having an opening through which projection light may pass, the center of said opening being intercepted by a plane normal to both said first and second walls; c. means on said second wall defining a circular opening having an axis lying in said plane; d. a cylindrical sleeve in said circular opening, said sleeve having a bore extending therethrough coaxial with said circular opening; e. a framing knob held to said sleeve for rotation relative to said housing; f. a shaft rotatably extending through said bore; g. a drive sprocket on said shaft adjacent said gate for engaging the strip of film and drawing it past said gate; and h. detent means interconnecting said shaft and said framing knob for controlling advancement of the filmstrip at a rate of one frame per engagement of a detent.
Claim 2
Independent Claim
183 words
A device for advancing and aligning a strip of film in a filmstrip projector, said device comprising: a. a housing having 1. a first wall, and 2. a second wall intersecting said first wall and normal thereto; b. means on said first wall defining a film gate having an opening through which projection light may pass, the center of said opening being intercepted by a plane normal to both said first and second walls; c. means on said second wall defining a circular opening having an axis lying in said plane; d. a cylindrical sleeve in said circular opening, said sleeve having a bore extending therethrough coaxial with said circular opening; e. a framing knob held to said sleeve for rotation relative to said housing; f. a shaft rotatably extending through said bore; g. a drive sprocket on said shaft adjacent said gate for engaging the strip of film and drawing it past said gate; and h. detent means interconnecting said shaft and said framing knob for controlling advancement of the filmstrip at a rate of one frame per engagement of a detent.
Claim 3
Dependent Claim
156 words
a second wall intersecting said first wall and normal thereto; b. means on said first wall defining a film gate having an opening through which projection light may pass, the center of said opening being intercepted by a plane normal to both said first and second walls; c. means on said second wall defining a circular opening having an axis lying in said plane; d. a cylindrical sleeve in said circular opening, said sleeve having a bore extending therethrough coaxial with said circular opening; e. a framing knob held to said sleeve for rotation relative to said housing; f. a shaft rotatably extending through said bore; g. a drive sprocket on said shaft adjacent said gate for engaging the strip of film and drawing it past said gate; and h. detent means interconnecting said shaft and said framing knob for controlling advancement of the filmstrip at a rate of one frame per engagement of a detent.
Claim 4
Dependent Claim
156 words
a second wall intersecting said first wall and normal thereto; b. means on said first wall defining a film gate having an opening through which projection light may pass, the center of said opening being intercepted by a plane normal to both said first and second walls; c. means on said second wall defining a circular opening having an axis lying in said plane; d. a cylindrical sleeve in said circular opening, said sleeve having a bore extending therethrough coaxial with said circular opening; e. a framing knob held to said sleeve for rotation relative to said housing; f. a shaft rotatably extending through said bore; g. a drive sprocket on said shaft adjacent said gate for engaging the strip of film and drawing it past said gate; and h. detent means interconnecting said shaft and said framing knob for controlling advancement of the filmstrip at a rate of one frame per engagement of a detent.
Claim 5
Dependent Claim
48 words
A device for advancing and aligning a strip of film in a filmstrip projector as defined in claim 1 wherein said detent means comprises: a. a plurality of lobeS fixed to said shaft for rotation therewith; and b. a member slidably mounted on said framing knob and having
Claim 6
Dependent Claim
10 words
spring means for biasing said last-mentioned means toward said lobes.
Claim 7
Dependent Claim
10 words
spring means for biasing said last-mentioned means toward said lobes.
Claim 8
Dependent Claim
156 words
a second wall intersecting said first wall and normal thereto; c. means on said first wall defining a film gate having an opening through which projection light may pass, the center of said opening being intercepted by a plane normal to both said first and second walls; d. means on said second wall defining a circular opening having an axis lying in said plane; e. a cylindrical sleeve in said circular opening, said sleeve having a bore extending therethrough coaxial with said circular opening; f. a framing knob held to said sleeve for rotation relative to said housing; g. a shaft rotatably extending through said bore; h. a drive sprocket on said shaft adjacent said gate for engaging the strip of film and drawing it through said gate; and i. detent means interconnecting said shaft and said framing knob for controlling advancement of the filmstrip at a rate of one frame per engagement of a detent.
Claim 9
Dependent Claim
156 words
a second wall intersecting said first wall and normal thereto; c. means on said first wall defining a film gate having an opening through which projection light may pass, the center of said opening being intercepted by a plane normal to both said first and second walls; d. means on said second wall defining a circular opening having an axis lying in said plane; e. a cylindrical sleeve in said circular opening, said sleeve having a bore extending therethrough coaxial with said circular opening; f. a framing knob held to said sleeve for rotation relative to said housing; g. a shaft rotatably extending through said bore; h. a drive sprocket on said shaft adjacent said gate for engaging the strip of film and drawing it through said gate; and i. detent means interconnecting said shaft and said framing knob for controlling advancement of the filmstrip at a rate of one frame per engagement of a detent.
Claim 10
Dependent Claim
11 words
spring means for biasing said last mentioned means toward said lobes.
Claim 11
Dependent Claim
11 words
spring means for biasing said last mentioned means toward said lobes.
Claim 12
Dependent Claim
45 words
An adapter for showing still pictures from a filmstrip in a slide projector having a light-projecting tube, said adapter comprising: a. a tubular member of a size adapted to be removably inserted in the light-projecting tube; b. a housing on said tube, said housing having
Claim 13
Dependent Claim
45 words
An adapter for showing still pictures from a filmstrip in a slide projector having a light-projecting tube, said adapter comprising: a. a tubular member of a size adapted to be removably inserted in the light-projecting tube; b. a housing on said tube, said housing having
Claim 14
Dependent Claim
48 words
A device for advancing and aligning a strip of film in a filmstrip projector as defined in claim 3 wherein said detent means comprises: a. a plurality of lobes fixed to said shaft for rotation therewith; and b. a member slidably mounted on said framing knob and having
Claim 15
Dependent Claim
48 words
A device for advancing and aligning a strip of film in a filmstrip projector as defined in claim 3 wherein said tubular member has means for releasably preventing axial movement in the light-projecting tube while permitting free rotational movement, whereby either horizontal or vertical formats may be shown.
References Cited (Backward Citations)
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Cited
FR534375A
Cited
CH105955A
Cited
US1893359A
Cited
GB596653A
Cited
US2793563A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |