Patent US3669383A successfully refreshed from Google Patents.
US3669383A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Movie projector adapted to use both a film cartridge and an open reel
Assignee: Ricoh Co Ltd
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Filing: 1970-12-14
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Granted: 1972-06-13
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Expires: 1990-12-14
Abstract
Abstract A movie projector has a reel support arm mounted in its housing for movement between a retracted, film cartridge attaching position and a projected reel mounting position, and has a film feed spindle adjacent its outer end. A film stripper pawl and a film threader are cooperable with film in a cartridge attached to the support arm to feed the film automatically to a film gate, and are connected to a driving means by operating mechanism including a clutch. A control mechanism for the clutch is operated, responsive to movement of the support arm to its projected position, to disengage the clutch means and maintain the clutch means disengaged while an open reel is mounted on the projected reel support arm.
Inventors
- 👤 Tatsusuke Kadowaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:14
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/32; G03B21/321; G03B21/323
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
A movie projector, adapted to use both a film cartridge and an open reel, comprising, in combination, a housing; a reel support arm mounted in said housing for movement between a retracted, film cartridge-attaching position and a projected open reel-mounting position, and having a film feed spindle adjacent its outer end; a film stripper pawl and a film threader cooperable with film in a cartridge attached to said support arm to feed the film automatically to a film gate; operating mechanism, including clutch means, connecting said pawl and said threader to driving means; control mechanism for said clutch means operable to control engagement of said clutch means; and means operatably associated with said control mechanism and said support arm and operable responsive to movement of said support arm to said projected reel-mounting position, to operate said control mechanism to disengage said clutch means.
Claim 2
Dependent Claim
143 words
A movie projector, adapted to use both a film cartridge and an open reel, comprising, in combination, a housing; a reel support arm mounted in said housing for movement between a retracted, film cartridge-attaching position and a projected open reel-mounting position, and having a film feed spindle adjacent its outer end; a film stripper pawl and a film threader cooperable with film in a cartridge attached to said support arm to feed the film automatically to a film gate; operating mechanism, including clutch means, connecting said pawl and said threader to driving means; control mechanism for said clutch means operable to control engagement of said clutch means; and means operatably associated with said control mechanism and said support arm and operable responsive to movement of said support arm to said projected reel-mounting position, to operate said control mechanism to disengage said clutch means.
Claim 3
Dependent Claim
50 words
A movie projector, as claimed in claim 1, in which said last named means comprises a projection on said support arm and a lever, included in said control mechanism, engageable by said projection and operated by the latter upon movement of said support (42) arm to said projected reel-mounting position.
Claim 4
Dependent Claim
71 words
A movie projector, as claimed in claim 1, in which said clutch means includes an axially fixed driven clutch member and a clutch ring driven by the driving means; said control mechanism including a pin cooperable with said clutch ring to disengage said clutch ring from said driven member; and a pivoted lever carrying said pin and operated by said means operatably associated with said control mechanism and said support arm.
Claim 5
Dependent Claim
73 words
A movie projector, as claimed in claim 3, including an abutment on the inner end of said support arm; and a second pivoted lever having an arm engaged by said abutment as said support arm is moved to its projected reel-mounting position, for pivoting of said second lever; said second lever having another arm engageable with said first lever to operate said pin to disengage said clutch ring from said driven clutch member.
Claim 6
Dependent Claim
42 words
A movie projector, as claimed in claim 3, including means operable, responsive to introduction of the end of a film into a film gate, to operate said lever to operate said pin to disengage said clutch ring from said clutch driven member.
References Cited (Backward Citations)
US3386675A
Cited
US3552683A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |