US3723650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for deriving the velocity and relative position of continuously moving information bearing media
Assignee: Eastman Kodak Co
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Filing: 1971-10-22
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Granted: 1973-03-27
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Expires: 1991-10-22
Abstract
Abstract Both the position and its time derivatives, such as velocity, of a continuously moving information bearing medium, such as perforated motion picture film, with respect to a predetermined position of apparatus for handling the information bearing medium are derived by a transducer with a specially shaped sensor element adapted to sense indicia, such as sprocket holes of motion picture film, carried by the information bearing medium. The sensor element includes at least first and second members located a predetermined distance apart, and the transducer is fixedly located with respect to the indicia carried by the moving information bearing medium so that the indicia successively engage the first and second members of the sensor element. The transducer derives a first signal indicative of the position of the moving information bearing medium when the indicia engages the first member. The transducer derives a second signal when the indicia engages the second member, and the velocity of the moving information bearing medium is derived from the predetermined distance and the time period between the first and second signals. The sensor may be provided with further members from which may be derived the instantaneous acceleration of the moving information bearing medium and further derivatives of the position, velocity and acceleration of the moving information bearing medium. The transducer may comprise a single piezoelectric element which is deflected by the engagement of the sprocket holes of the movie film by the first and second members of the sensor.
Inventors
- 👤 J Bradley
- 👤 C Schauffele
- 👤 Clair J St
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:29
CPC Classifications
G; G03; G03B; G03B35/00; G03B35/18; G03B35/24; G01; G01P; G01P3/00; G01P3/64; G01P3/66; G03B21/00; G03B21/10; G03B21/11; G03B21/111; G03B21/113; G03B21/14; G03B21/32; G03B21/43; G03B31/00; G03B31/02; G06; G06K; G06K17/00
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
144 words
In apparatus for handling an information bearing medium having spaced perforations, said apparatus including means for moving said information bearing medium along a path, a perforation sensor comprising: a. transducer means for producing an electrical signal in response to a mechanical input; b. first sensor means for engaging each perforation of the information bearing medium in a predetermined manner and for transmitting a first mechanical input to said transducer means in response to each perforation, whereby said transducer means produces a first signal in response to each perforation; c. second sensor means fixedly located a predetermined distance, Delta D, from said first sensor means for engaging each perforation of said information bearing medium moving in said path and for transmitting a second mechanical input to said transducer means in response to each perforation, whereby said transducer means produces a second signal in response thereto.
Claim 2
Dependent Claim
144 words
In apparatus for handling an information bearing medium having spaced perforations, said apparatus including means for moving said information bearing medium along a path, a perforation sensor comprising: a. transducer means for producing an electrical signal in response to a mechanical input; b. first sensor means for engaging each perforation of the information bearing medium in a predetermined manner and for transmitting a first mechanical input to said transducer means in response to each perforation, whereby said transducer means produces a first signal in response to each perforation; c. second sensor means fixedly located a predetermined distance, Delta D, from said first sensor means for engaging each perforation of said information bearing medium moving in said path and for transmitting a second mechanical input to said transducer means in response to each perforation, whereby said transducer means produces a second signal in response thereto.
Claim 3
Dependent Claim
73 words
The perforation sensor of claim 1 wherein said first and second sensor element means comprise first and second step members, adapted to engage the leading edge of each perforation, of a sensor element that is in continuous engagement with said information bearing medium, and wherein said sensor element further comprises a ramp member adapted to engage the trailing edge of each perforation for deflecting said sensor element out of engagement with the perforations.
Claim 4
Dependent Claim
97 words
second means fixedly located a predetermined distance, Delta D, from said first means for engaging each perforation of the information bearing medium moving in said path and for transmitting a second mechanical input to said transducer means in response to each perforation, whereby said transducer means produces a second signal in response thereto; and c. means responsive to the first and second signals and the predetermined distance, Delta D, between said first and second means for producing a third signal indicative of a time derivative of movement of said information bearing medium in said path of travel.
Claim 5
Dependent Claim
97 words
second means fixedly located a predetermined distance, Delta D, from said first means for engaging each perforation of the information bearing medium moving in said path and for transmitting a second mechanical input to said transducer means in response to each perforation, whereby said transducer means produces a second signal in response thereto; and c. means responsive to the first and second signals and the predetermined distance, Delta D, between said first and second means for producing a third signal indicative of a time derivative of movement of said information bearing medium in said path of travel.
Claim 6
Dependent Claim
170 words
second means fixedly located a predetermined distance, Delta D, from said first means for engaging said perforations as said image bearing medium moves in said path of travel and for deforming said transducer means in response to each engagement of a perforation, whereby said transducer means produces a second signal in response thereto; d. scanning means for scanning, at a predetermined repetitive frequency, said image frames moving in said path of travel; e. first control means responsive to said first signal for effecting the position of said scanning means in synchronism with the position of each image frame relative to said scanning means; f. means responsive to the first and second signals and the predetermined distance between said first and second means for producing a third signal indicative of the velocity of movement of said image bearing medium; and g. second control means responsive to the third signal for effecting the movement of the scanning means in synchronism with the velocity of each image frame in said path of travel.
Claim 7
Dependent Claim
170 words
second means fixedly located a predetermined distance, Delta D, from said first means for engaging said perforations as said image bearing medium moves in said path of travel and for deforming said transducer means in response to each engagement of a perforation, whereby said transducer means produces a second signal in response thereto; d. scanning means for scanning, at a predetermined repetitive frequency, said image frames moving in said path of travel; e. first control means responsive to said first signal for effecting the position of said scanning means in synchronism with the position of each image frame relative to said scanning means; f. means responsive to the first and second signals and the predetermined distance between said first and second means for producing a third signal indicative of the velocity of movement of said image bearing medium; and g. second control means responsive to the third signal for effecting the movement of the scanning means in synchronism with the velocity of each image frame in said path of travel.
Claim 8
Dependent Claim
39 words
The perforation sensor of claim 2 further comprising means responsive to the first and second signals and Delta D for producing a third signal indicative of a time derivative of movement of the information bearing medium in said path.
Claim 9
Dependent Claim
36 words
The perforation sensor means of claim 2 wherein said sensor element further comprises a ramp member adapted to engage the trailing edge of a perforation for deflecting said sensor element out of engagement with said perforation.
Claim 10
Dependent Claim
108 words
The perforation sensor of claim 2 further comprising: a. means for retaining said sensor element in continuous contact with said transducer means, whereby the engagements of the leading edge of each perforation by said first and second step members are transmitted to said transducer means as said first and second mechanical inputs; and b. means for maintaining said sensor element in continuous engagement with said information bearing medium under a predetermined mechanical tension, whereby said transducer means sustains a predetermined mechanical deformation that is released as said first and second mechanical inputs upon engagement of the leading edge of each perforation by said first and second step members.
Claim 11
Dependent Claim
129 words
The perforation sensor of claim 5 wherein said transducer means comprises: a. a piezoelectric element having electrical terminals thereon at which the electrical signals are generated in response to mechanical deformation of the piezoelectric element; b. means for clamping a first end of said piezoelectric element in stationary relationship with respect to said path of travel of said information bearing medium; and c. means for attaching said sensor element to a second end of said piezoelectric element and in continuous engagement with respect to said path of travel of the information bearing medium, whereby said first and second mechanical inputs are transmitted to said piezoelectric element in response to the engagement of said leading edge of each perforation by said first and second step members of said sensor element.
Claim 12
Dependent Claim
64 words
In apparatus for handling information bearing medium having spaced perforations, said apparatus including means for moving said information bearing medium along a path, a perforation sensor comprising: a. transducer means for producing an electrical signal in response to a mechanical input; b. a sensor element in continuous engagement with the information bearing medium as it moves in said path, said sensor element further comprising:
Claim 13
Dependent Claim
64 words
In apparatus for handling information bearing medium having spaced perforations, said apparatus including means for moving said information bearing medium along a path, a perforation sensor comprising: a. transducer means for producing an electrical signal in response to a mechanical input; b. a sensor element in continuous engagement with the information bearing medium as it moves in said path, said sensor element further comprising:
Claim 14
Dependent Claim
60 words
The perforation sensor means of claim 7 wherein said first means comprises a first step member adapted to engage the leading edge of each perforation in said path of travel, and said second means comprises a second step member located the predetermined distance, Delta D, with respect to said first step member for engaging said leading edge of each perforation.
Claim 15
Dependent Claim
101 words
The perforation sensor of claim 8 further comprising: a. means for retaining said sensor element in continuous contact with said transducer means, whereby each engagement of the leading edge of each perforation are transmitted to said transducer means as said first and second mechanical inputs; and b. means for maintaining said sensor element in continuous engagement with said information bearing medium under a predetermined mechanical tension, whereby said transducer means sustains a predetermined mechanical deformation that is released as said first and second mechanical inputs upon engagement of the leading edge of each perforation by said first and second step members.
Claim 16
Dependent Claim
129 words
The perforation sensor of Claim 9 wherein said transducer means comprises: a. a piezoelectric element having electrical terminals thereon at which the electrical signals are generated in response to mechanical deformation of the piezoelectric element; b. means for clamping a first end of said piezoelectric element in stationary relationship with respect to said path of travel of said information bearing medium; and c. means for attaching said sensor element at a second end of said piezoelectric element and in continuous engagement with respect to said path of travel of said information bearing medium, whereby said first and second mechanical inputs are transmitted to said piezoelectric element in response to the engagement of said leading edge of each Perforation by said first and second step members of said sensor element.
Claim 17
Dependent Claim
116 words
Apparatus for deriving the position and time derivatives of movement of a moving image bearing medium, said image bearing medium having a plurality of successive image frames disposed thereon and a corresponding plurality of perforations located in predetermined spaced relationship with respect to said plurality of image frames, said apparatus comprising: a. means for moving, at a nominal velocity, the image bearing medium along a predetermined path; b. transducer means responsive to mechanical deformation thereof for producing a signal; c. a sensor element in continuous contact with the transducer means and continuously engageable with said image bearing medium in the path of travel of the perforations of said image bearing medium, said sensor element further comprising:
Claim 18
Dependent Claim
116 words
Apparatus for deriving the position and time derivatives of movement of a moving image bearing medium, said image bearing medium having a plurality of successive image frames disposed thereon and a corresponding plurality of perforations located in predetermined spaced relationship with respect to said plurality of image frames, said apparatus comprising: a. means for moving, at a nominal velocity, the image bearing medium along a predetermined path; b. transducer means responsive to mechanical deformation thereof for producing a signal; c. a sensor element in continuous contact with the transducer means and continuously engageable with said image bearing medium in the path of travel of the perforations of said image bearing medium, said sensor element further comprising:
Claim 19
Dependent Claim
70 words
The apparatus of claim 11 wherein said first and second means comprise first and second step members, adapted to engage the leading edge of each perforation, of said sensor element that is in continuous engagement with said image bearing medium, and wherein said sensor element further comprises a ramp member adapted to engage the trailing edge of each perforation for deflecting said sensor element out of engagement with the perforation.
Claim 20
Independent Claim
240 words
A method of deriving the position and velocity of a moving image bearing medium, said image bearing medium having a plurality of successive image frames disposed thereon and a corresponding plurality of perforations located in predetermined spaced relationship with respect to said plurality of image frames, said method comprising the steps of: a. moving, at a nominal velocity, the image bearing medium in a predetermined path of travel; b. sensing, at a first predetermined position with respect to said path of travel of said image bearing medium, the leading edge of each perforation moving in said path of travel and producing a first signal in response thereto; c. sensing, at a second predetermined location with respect to said path of travel of said image bearing medium, each perforation moving in said path of travel and producing a second signal in response thereto; d. scanning, at a predetermined repetitive frequency, said image frames moving in said path of travel; e. controlling, in response to said first signal, the position of said scanning means in synchronism with the position of each image frame relative to said scanning means; f. producing a third signal indicative of the velocity of movement of said image bearing medium in response to the first and second signal; and g. controlLing, in response to the third signal, the movement of the scanning means in synchronism with the velocity of each image frame moving in said path of travel.
Claim 21
Independent Claim
240 words
A method of deriving the position and velocity of a moving image bearing medium, said image bearing medium having a plurality of successive image frames disposed thereon and a corresponding plurality of perforations located in predetermined spaced relationship with respect to said plurality of image frames, said method comprising the steps of: a. moving, at a nominal velocity, the image bearing medium in a predetermined path of travel; b. sensing, at a first predetermined position with respect to said path of travel of said image bearing medium, the leading edge of each perforation moving in said path of travel and producing a first signal in response thereto; c. sensing, at a second predetermined location with respect to said path of travel of said image bearing medium, each perforation moving in said path of travel and producing a second signal in response thereto; d. scanning, at a predetermined repetitive frequency, said image frames moving in said path of travel; e. controlling, in response to said first signal, the position of said scanning means in synchronism with the position of each image frame relative to said scanning means; f. producing a third signal indicative of the velocity of movement of said image bearing medium in response to the first and second signal; and g. controlLing, in response to the third signal, the movement of the scanning means in synchronism with the velocity of each image frame moving in said path of travel.
Claim 22
Independent Claim
201 words
A method of deriving the position and time derivatives of movement of perforations of an information bearing medium moving at a nominal velocity along a predetermined path, said method comprising the steps of: a. locating a first sensor element at a first predetermined position with respect to said predetermined path; b. locating a second sensor element in a second predetermined position with respect to said predetermined path; c. depressing the first and second sensor elements into engagement with the information bearing medium so that the first and second sensor elements undergo first and second physical displacements with respect to their first and second respective positions upon engagement of the leading edge of each perforation; d. transducing the first and second physical displacements of the first and second sensor elements into first and second electrical signals respectively; e. detecting the position of each perforation of the information bearing medium from the first signal; and f. detecting the velocity of the moving information bearing medium from the elapsed time period, Delta T, between the occurrences of the first and second signals and from the relative distance, Delta D, between the first and second predetermined positions of said first and second sensor elements, respectively.
Claim 23
Independent Claim
201 words
A method of deriving the position and time derivatives of movement of perforations of an information bearing medium moving at a nominal velocity along a predetermined path, said method comprising the steps of: a. locating a first sensor element at a first predetermined position with respect to said predetermined path; b. locating a second sensor element in a second predetermined position with respect to said predetermined path; c. depressing the first and second sensor elements into engagement with the information bearing medium so that the first and second sensor elements undergo first and second physical displacements with respect to their first and second respective positions upon engagement of the leading edge of each perforation; d. transducing the first and second physical displacements of the first and second sensor elements into first and second electrical signals respectively; e. detecting the position of each perforation of the information bearing medium from the first signal; and f. detecting the velocity of the moving information bearing medium from the elapsed time period, Delta T, between the occurrences of the first and second signals and from the relative distance, Delta D, between the first and second predetermined positions of said first and second sensor elements, respectively.
References Cited (Backward Citations)
US3564169A
Cited
US3611403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |