US3909120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic and electrostatic recording shield
Assignee: Polaroid Corp
•
Filing: 1973-06-28
•
Granted: 1975-09-30
•
Expires: 1993-06-28
Abstract
Abstract A photographic system for sound motion pictures, comprising a film cassette containing a strip of film, a supply of processing composition, and a processor programmed to apply the processing composition to the film upon manipulation of the film in the cassette and a film drive and projection system adapted to receive the cassette, and containing recording means to enable the recording of a sound track on the strip of film and the subsequent replaying of such recording. The recording means includes novel shielding means which extends at least partially over the cassette to ameliorate electromagnetic and electrostatic interference.
Inventors
- 👤 Joseph A Stella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:14
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/26; G03B17/265
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
269 words
A magnetic recording and playback head mechanism for use with a moving cinematographic film strip, having a magnetic sound track on one face thereof and having a photographic emulsion on the opposite face thereof and adapted to receive a layer of processing composition on said opposite face to process a photographic image and including: transducer means movable from an idle position to an operative position in engagement with said sound track; means for supporting said film strip in abutment with said transducer means when said transducer means is in said operative position; means connected to and partially surrounding said transducer means and adapted to cooperate with said supporting means for establishing an electromagnetic and electrostatic shield about said transducer means and a portion of said sound track proximate said tranSducer means; said means partially surrounding said transducer means being proximate said supporting means when said transducer means moves into said operative position; said partially surrounding means and said supporting means being fabricated from material having a high magnetic permeability; said film strip being disposed within a cassette, and said supporting means being secured within said cassette and adapted to engage said film strip; and a housing; said cassette being receivable within said housing and said transducer means being connected to and disposed within said housing; said transducer means being provided with mounting means for maintaining engagement and a predetermined registration between said transducer means, said sound track, and said supporting means; and said means partially surrounding said transducer means being adapted to extend partially over opposite faces of said cassette when said transducer means is in said operative position.
Claim 2
Dependent Claim
269 words
A magnetic recording and playback head mechanism for use with a moving cinematographic film strip, having a magnetic sound track on one face thereof and having a photographic emulsion on the opposite face thereof and adapted to receive a layer of processing composition on said opposite face to process a photographic image and including: transducer means movable from an idle position to an operative position in engagement with said sound track; means for supporting said film strip in abutment with said transducer means when said transducer means is in said operative position; means connected to and partially surrounding said transducer means and adapted to cooperate with said supporting means for establishing an electromagnetic and electrostatic shield about said transducer means and a portion of said sound track proximate said tranSducer means; said means partially surrounding said transducer means being proximate said supporting means when said transducer means moves into said operative position; said partially surrounding means and said supporting means being fabricated from material having a high magnetic permeability; said film strip being disposed within a cassette, and said supporting means being secured within said cassette and adapted to engage said film strip; and a housing; said cassette being receivable within said housing and said transducer means being connected to and disposed within said housing; said transducer means being provided with mounting means for maintaining engagement and a predetermined registration between said transducer means, said sound track, and said supporting means; and said means partially surrounding said transducer means being adapted to extend partially over opposite faces of said cassette when said transducer means is in said operative position.
Claim 3
Dependent Claim
40 words
The invention as set forth in claim 1, wherein said supporting means is resiliently secured within said cassette and is adapted to resiliently sandwich said film strip with said transducer means when said transducer means is in the operative position.
Claim 4
Dependent Claim
16 words
The invention as related in claim 2, wherein said material of high magnetic permeability comprises mu-metal.
Claim 5
Dependent Claim
232 words
Means for use in transcribing and broadcasting sound in conjunction with a moving film strip having a magnetic sound track on one face thereof and a photographic emulsion and a processing composition on the opposite face thereof, including: a base; means connected to said base and initially spaced from said film strip for supporting said film strip; transducer means movable from an idle position to an operative position in engagement with said sound track; and means connected to and partially surrounding said transducer means and cooperable with said supporting means for establishing an electromagnetic and electrostatic shield about said transducer means and a portion of said sound track proximate said transducer means; said partially surrounding means and said supporting means being fabricated of a material having a high magnetic permeability; a cassette; said film strip being disposed within said cassette, and said supporting means being secured within said cassette and adapted to engage said film strip upon movement of said transducer means into said operative position; said transducer means being provided with mounting means for maintaining engagement and a predetermined registration between said transducer means, said sound track, and said supporting means; said cassette being provided with an aperture proximate said support means and said means partially surrounding said transducer means being adapted to cover said aperture and partially extend over said cassette when said transducer means is in said operative position.
Claim 6
Dependent Claim
232 words
Means for use in transcribing and broadcasting sound in conjunction with a moving film strip having a magnetic sound track on one face thereof and a photographic emulsion and a processing composition on the opposite face thereof, including: a base; means connected to said base and initially spaced from said film strip for supporting said film strip; transducer means movable from an idle position to an operative position in engagement with said sound track; and means connected to and partially surrounding said transducer means and cooperable with said supporting means for establishing an electromagnetic and electrostatic shield about said transducer means and a portion of said sound track proximate said transducer means; said partially surrounding means and said supporting means being fabricated of a material having a high magnetic permeability; a cassette; said film strip being disposed within said cassette, and said supporting means being secured within said cassette and adapted to engage said film strip upon movement of said transducer means into said operative position; said transducer means being provided with mounting means for maintaining engagement and a predetermined registration between said transducer means, said sound track, and said supporting means; said cassette being provided with an aperture proximate said support means and said means partially surrounding said transducer means being adapted to cover said aperture and partially extend over said cassette when said transducer means is in said operative position.
Claim 7
Dependent Claim
236 words
A film-laden cassette for use in conjunction with a magnetic recording and playback mechanism, disposed within motion picture apparatus, having transducer means movable between an idle position and an operative position in engagement with said film and an electromagnetic and electrostatic shield partially surrounding said transducer means; said cassette including a support mounted therewithin and adapted to engage said shield and sandwich said film with said transducer means so as to form an electromagnetic and electrostatic shield which surrounds said transducer means and a portion of said film proximate said transducer means when said transducer means is in said operative position; said supporting means being initially spaced from said film and said film being brought into abutment with said supporting means when said cassette is positioned within said motion picture apparatus and said transducer means is moved into said operative position; said partially surrounding shield and said supporting means comprising material Of high magnetic permeability; and guiding means connected to said transducer means and adapted to extend over opposite edges of said film to engage said supporting means to thereby establish and maintain registration between said transducer, said sound track, and said supporting means; said cassette being provided with means for coating one face of said film with photographic processing composition and said supporting means being provided with spaced raised support portions for engaging opposite edge portions of said film strip on said composition bearing face.
Claim 8
Dependent Claim
236 words
A film-laden cassette for use in conjunction with a magnetic recording and playback mechanism, disposed within motion picture apparatus, having transducer means movable between an idle position and an operative position in engagement with said film and an electromagnetic and electrostatic shield partially surrounding said transducer means; said cassette including a support mounted therewithin and adapted to engage said shield and sandwich said film with said transducer means so as to form an electromagnetic and electrostatic shield which surrounds said transducer means and a portion of said film proximate said transducer means when said transducer means is in said operative position; said supporting means being initially spaced from said film and said film being brought into abutment with said supporting means when said cassette is positioned within said motion picture apparatus and said transducer means is moved into said operative position; said partially surrounding shield and said supporting means comprising material Of high magnetic permeability; and guiding means connected to said transducer means and adapted to extend over opposite edges of said film to engage said supporting means to thereby establish and maintain registration between said transducer, said sound track, and said supporting means; said cassette being provided with means for coating one face of said film with photographic processing composition and said supporting means being provided with spaced raised support portions for engaging opposite edge portions of said film strip on said composition bearing face.
Claim 9
Dependent Claim
163 words
Apparatus for use with a cassette having a movable magnetic sound track bearing strip disposed therein and support means therewithin for supporting said strip adjacent an aperture in said cassette, including: transducer means movable from an idle position to an operative position in engagement with said sound track thereby sandwiching said strip with said support means; and means connected to and partially surrounding said transducer means and adapted to cooperate with said supporting means for establishing an electromagnetic and electrostatic shield about said transducer means and a portion of said sound track proximate said transducer means; said means connected to said transducer means cooperating with said supporting means to surround said transducer means and a portion of said strip; said apparatus comprising motion picture apparatus having said transducer means disposed therein and said strip comprising a cinematographic film strip; said partially surrounding means being configured to partially extend over opposite sides of said cassette when said transducer means is in said operative position.
Claim 10
Dependent Claim
163 words
Apparatus for use with a cassette having a movable magnetic sound track bearing strip disposed therein and support means therewithin for supporting said strip adjacent an aperture in said cassette, including: transducer means movable from an idle position to an operative position in engagement with said sound track thereby sandwiching said strip with said support means; and means connected to and partially surrounding said transducer means and adapted to cooperate with said supporting means for establishing an electromagnetic and electrostatic shield about said transducer means and a portion of said sound track proximate said transducer means; said means connected to said transducer means cooperating with said supporting means to surround said transducer means and a portion of said strip; said apparatus comprising motion picture apparatus having said transducer means disposed therein and said strip comprising a cinematographic film strip; said partially surrounding means being configured to partially extend over opposite sides of said cassette when said transducer means is in said operative position.
Claim 11
Dependent Claim
206 words
A magnetic recording and playback head mechanism for use with a moving cinematographic film strip having a magnetic sound track on one face thereof and having a photographic emulsion on the opposite face thereof and adapted to receive a layer of processing composition on said opposite face to process a photographic image and including: a cassette; said strip being disposed in said cassette; transducer means movable from an idle position to an operative position in engagement with said sound track; means for supporting said film strip in abutment with said transducer means when said transducer means is in said operative position; and means connected to and partially surrounding said transducer means and adapted to cooperate with said supporting means for establishing an electromagnetic and electrostatic shield about said transducer means and a portion of said sound track proximate said transducer means; said means partially surrounding said transducer means being proximate said supporting means when said transducer means moves into said operative position; said partially surrounding means and said supporting means being fabricated from material having a high magnetic permeability; said means partially surrounding said transducer means being adapted to extend partially over opposite faces of said cassette when said transducer means is in said operative position.
Claim 12
Dependent Claim
206 words
A magnetic recording and playback head mechanism for use with a moving cinematographic film strip having a magnetic sound track on one face thereof and having a photographic emulsion on the opposite face thereof and adapted to receive a layer of processing composition on said opposite face to process a photographic image and including: a cassette; said strip being disposed in said cassette; transducer means movable from an idle position to an operative position in engagement with said sound track; means for supporting said film strip in abutment with said transducer means when said transducer means is in said operative position; and means connected to and partially surrounding said transducer means and adapted to cooperate with said supporting means for establishing an electromagnetic and electrostatic shield about said transducer means and a portion of said sound track proximate said transducer means; said means partially surrounding said transducer means being proximate said supporting means when said transducer means moves into said operative position; said partially surrounding means and said supporting means being fabricated from material having a high magnetic permeability; said means partially surrounding said transducer means being adapted to extend partially over opposite faces of said cassette when said transducer means is in said operative position.
Claim 13
Dependent Claim
40 words
The invention as set forth in claim 7, wherein said supporting means is resiliently secured within said cassette and is adapted to resiliently sandwich said film strip with said transducer means when said transducer means is in said operative position.
Claim 14
Dependent Claim
16 words
The invention as related in claim 8, wherein said material of high magnetic permeability comprises mu-metal.
Claim 15
Dependent Claim
175 words
A magnetic recording and playback head mechanism for use with a moving strip having a magnetic sound track one one face thereof, including: a cassette: said strip being disposed in said cassette; transducer means movable from an idle position to an operative position in engagement with said sound track; first shielding means in said cassette and located on the opposite side of said strip from said transducer means when said transducer means is in said operative position; and secOnd shielding means connected to and partially surrounding said transducer means and adapted to cooperate with said first shielding means for establishing an electromagnetic and electrostatic shield about said transducer means and a portion of said sound track proximate said transducer means; said second shielding means being proximate said first shielding means when said transducer means moves into said operative position; said first and second shielding means being fabricated from material haaving a high magnetic permeability; said second shielding means extending partially over opposite faces of said cassette when said transducer means is in said operative position.
Claim 16
Dependent Claim
175 words
A magnetic recording and playback head mechanism for use with a moving strip having a magnetic sound track one one face thereof, including: a cassette: said strip being disposed in said cassette; transducer means movable from an idle position to an operative position in engagement with said sound track; first shielding means in said cassette and located on the opposite side of said strip from said transducer means when said transducer means is in said operative position; and secOnd shielding means connected to and partially surrounding said transducer means and adapted to cooperate with said first shielding means for establishing an electromagnetic and electrostatic shield about said transducer means and a portion of said sound track proximate said transducer means; said second shielding means being proximate said first shielding means when said transducer means moves into said operative position; said first and second shielding means being fabricated from material haaving a high magnetic permeability; said second shielding means extending partially over opposite faces of said cassette when said transducer means is in said operative position.
Claim 17
Dependent Claim
217 words
Means for use in transcribing and broadcasting sound in conjunction with a moving strip having a magnetic sound track on one face thereof, including: a base; means connected to said base and initially spaced from said film strip for supporting said film strip; transducer means movable from an idle position to an operative position in engagement with said sound track; means connected to and partially surrounding said transducer means and cooperable with said supporting means for establishing an electromagnetic and electrostatic shield about said transducer means and a portion of said sound track proximate said transducer means; and said partially surrounding means and said supporting means being fabricated of a material having a high magnetic permeability; and a cassette; said strip being disposed within said cassette; said supporting means being secured within said cassette and adapted to engage said film strip upon movement of said transducer means into said operative position; said transducer means being provided with mounting means for maintaining engagement and a predetermined registration between said transducer means, said sound track, and said supporting means; said cassette being provided with an aperture proximate said supporting means, and said means partially surrounding said transducer means being adapted to cover said aperture and partially extend over said cassette when said transducer means is in said operative position.
Claim 18
Dependent Claim
217 words
Means for use in transcribing and broadcasting sound in conjunction with a moving strip having a magnetic sound track on one face thereof, including: a base; means connected to said base and initially spaced from said film strip for supporting said film strip; transducer means movable from an idle position to an operative position in engagement with said sound track; means connected to and partially surrounding said transducer means and cooperable with said supporting means for establishing an electromagnetic and electrostatic shield about said transducer means and a portion of said sound track proximate said transducer means; and said partially surrounding means and said supporting means being fabricated of a material having a high magnetic permeability; and a cassette; said strip being disposed within said cassette; said supporting means being secured within said cassette and adapted to engage said film strip upon movement of said transducer means into said operative position; said transducer means being provided with mounting means for maintaining engagement and a predetermined registration between said transducer means, said sound track, and said supporting means; said cassette being provided with an aperture proximate said supporting means, and said means partially surrounding said transducer means being adapted to cover said aperture and partially extend over said cassette when said transducer means is in said operative position.
Claim 19
Dependent Claim
150 words
Apparatus for use with a cassette having a moving magnetic sound track bearing strip disposed therein and first shielding means therewithin adjacent said strip adjacent an aperture in said cassette, including: transducer means movable from an idle position to an operative position in engagement with said sound track; and second shielding means connected to and partially surrounding said transducer means and adapted to cooperate with said first shielding means for establishing an electromagnetic and electrostatic shield about said transducer means and a portion of said sound track proximate said transducer means; said second shielding cooperating with said first shielding means to surround said transducer means and a portion of said strip; said first and second shielding means being fabricated from material having a high magnetic permeability; said second shielding means being configured to partially extend over opposite sides of said cassette when said transducer means is in said operative position.
Claim 20
Dependent Claim
150 words
Apparatus for use with a cassette having a moving magnetic sound track bearing strip disposed therein and first shielding means therewithin adjacent said strip adjacent an aperture in said cassette, including: transducer means movable from an idle position to an operative position in engagement with said sound track; and second shielding means connected to and partially surrounding said transducer means and adapted to cooperate with said first shielding means for establishing an electromagnetic and electrostatic shield about said transducer means and a portion of said sound track proximate said transducer means; said second shielding cooperating with said first shielding means to surround said transducer means and a portion of said strip; said first and second shielding means being fabricated from material having a high magnetic permeability; said second shielding means being configured to partially extend over opposite sides of said cassette when said transducer means is in said operative position.
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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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |