Patent US3909835A successfully refreshed from Google Patents.
US3909835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for continuously driving a camera
Assignee: Canon Inc
•
Filing: 1973-06-14
•
Granted: 1975-09-30
•
Expires: 1993-06-14
Abstract
Abstract In a device for continuously driving a camera wherein a charge mechanism for film advance and shutter charge may be intermittently driven through a clutch mechanism and a shutter release mechanism may be driven from an electric motor during the inoperative period of the charge mechanism to thereby effect a sequence of shots during the revolutions of the motor, an adjustable constant voltage circuit is provided for energizing the electric motor so that the interval between successive shots of the camera may be adjusted by adjusting the voltage of the circuit.
Inventors
- 👤 Tadashi Ito
- 👤 Fumio Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:40
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/42; G03B17/425
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
146 words
In a device for continuously driving a camera comprising an electric motor, a charge mechanism for film advance and shutter charge, a shutter release mechanism and a power transmission mechanism, said charge mechanism being intermittently driven through a clutch mechanism and said shutter release mechanism being driven from said electric motor during the inoperative period of said charge mechanism, thereby effecting a sequence of picture-taking operations during the revolutions of said motor, the improvements comprising an adjustable constant voltage circuit provided for energizing said electric motor, whereby the interval between successive shots of the camera is adjusted by adjusting the voltage of said circuit, and further comprising a cam for controlling said release mechanism disposed between said electric motor and said clutch mechanism, said cam being effective to maintain said release mechanism inoperative for a predetermined time after completion of the operation of said charge mechanism.
Claim 2
Dependent Claim
146 words
In a device for continuously driving a camera comprising an electric motor, a charge mechanism for film advance and shutter charge, a shutter release mechanism and a power transmission mechanism, said charge mechanism being intermittently driven through a clutch mechanism and said shutter release mechanism being driven from said electric motor during the inoperative period of said charge mechanism, thereby effecting a sequence of picture-taking operations during the revolutions of said motor, the improvements comprising an adjustable constant voltage circuit provided for energizing said electric motor, whereby the interval between successive shots of the camera is adjusted by adjusting the voltage of said circuit, and further comprising a cam for controlling said release mechanism disposed between said electric motor and said clutch mechanism, said cam being effective to maintain said release mechanism inoperative for a predetermined time after completion of the operation of said charge mechanism.
Claim 3
Dependent Claim
142 words
In a device for continuously driving a camera comprising an electric motor, a charge mechanism for film advance and shutter charge, a shutter release mechanism and a power transmission mechanism, said charge mechanism being intermittently driven through a clutch mechanism and said shutter release mechanism being driven from said electric motor during the inoperative pEriod of said charge mechanism, thereby effecting a sequence of picture-taking operations during the revolutions of said motor, the improvement comprising an adjustable constant voltage circuit provided for energizing said electric motor, whereby the interval between successive shots of the camera is adjusted by adjusting the voltage of said circuit, in combination with the further improvement that said charge mechanism includes a film advance sprocket wheel which may be disconnected from said power transmission mechanism in response to opening of the camera''s back cover and free to rotate.
Claim 4
Dependent Claim
142 words
In a device for continuously driving a camera comprising an electric motor, a charge mechanism for film advance and shutter charge, a shutter release mechanism and a power transmission mechanism, said charge mechanism being intermittently driven through a clutch mechanism and said shutter release mechanism being driven from said electric motor during the inoperative pEriod of said charge mechanism, thereby effecting a sequence of picture-taking operations during the revolutions of said motor, the improvement comprising an adjustable constant voltage circuit provided for energizing said electric motor, whereby the interval between successive shots of the camera is adjusted by adjusting the voltage of said circuit, in combination with the further improvement that said charge mechanism includes a film advance sprocket wheel which may be disconnected from said power transmission mechanism in response to opening of the camera''s back cover and free to rotate.
Claim 5
Dependent Claim
156 words
In a device for continuously driving a camera comprising an electric motor, a charge mechanism for film advance and shutter charge, a shutter release mechanism and a power transmission mechanism, said charge mechanism being intermittently driven through a clutch mechanism and said shutter release mechanism being driven from said electric motor during the inoperative period of said charge mechanism, thereby effecting a sequence of picture-taking operations during the revolutions of said motor, the improvement comprising an adjustable constant voltage circuit provided for energizing said electric motor, whereby the interval between successive shots of the camera is adjusted by adjusting the voltage of said circuit, and the in combination with the further improvement that said clutch mechanism includes a clutch pawl, a ratchet wheel having a plurality of teeth engageable by said pawl, means for causing said clutch pawl to engage said ratchet wheel and means for disengaging said pawl from said ratchet at a predetermined position.
Claim 6
Dependent Claim
156 words
In a device for continuously driving a camera comprising an electric motor, a charge mechanism for film advance and shutter charge, a shutter release mechanism and a power transmission mechanism, said charge mechanism being intermittently driven through a clutch mechanism and said shutter release mechanism being driven from said electric motor during the inoperative period of said charge mechanism, thereby effecting a sequence of picture-taking operations during the revolutions of said motor, the improvement comprising an adjustable constant voltage circuit provided for energizing said electric motor, whereby the interval between successive shots of the camera is adjusted by adjusting the voltage of said circuit, and the in combination with the further improvement that said clutch mechanism includes a clutch pawl, a ratchet wheel having a plurality of teeth engageable by said pawl, means for causing said clutch pawl to engage said ratchet wheel and means for disengaging said pawl from said ratchet at a predetermined position.
Claim 7
Independent Claim
202 words
A device for continuously driving a camera comprising an electric motor, a charge mechanism for film advance and shutter charge, a shutter release mechanism and a power transmission mechanism, said charge mechanism being intermittently driven through a clutch mechanism and said shutter release mechanism being driven from said electric motor during the inoperative period of said charge mechanism, thereby effecting a sequence of picture-taking operations during the revolutions of said motor; and further comprising means for supplying an adjustable voltage regulated for constancy under load variations to said motor for preventing instability in the interval between successive shots of the camera and for thereby adjusting said interval by adjusting the voltage at which said electric motor is energized, said regulated voltage supply means comprising: a source of reference voltage, means for comparing a fraction of the output voltage with the reference voltage and controlling a semiconductor device to regulate the output voltage by bringing said fraction of the output voltage into a predetermined substantially equal relation to said reference voltage, and means for varying the fraction of the output voltage compared as aforesaid with the reference voltage and thereby adjusting the voltage magnitude at which said output voltage is regulated for constancy.
Claim 8
Independent Claim
202 words
A device for continuously driving a camera comprising an electric motor, a charge mechanism for film advance and shutter charge, a shutter release mechanism and a power transmission mechanism, said charge mechanism being intermittently driven through a clutch mechanism and said shutter release mechanism being driven from said electric motor during the inoperative period of said charge mechanism, thereby effecting a sequence of picture-taking operations during the revolutions of said motor; and further comprising means for supplying an adjustable voltage regulated for constancy under load variations to said motor for preventing instability in the interval between successive shots of the camera and for thereby adjusting said interval by adjusting the voltage at which said electric motor is energized, said regulated voltage supply means comprising: a source of reference voltage, means for comparing a fraction of the output voltage with the reference voltage and controlling a semiconductor device to regulate the output voltage by bringing said fraction of the output voltage into a predetermined substantially equal relation to said reference voltage, and means for varying the fraction of the output voltage compared as aforesaid with the reference voltage and thereby adjusting the voltage magnitude at which said output voltage is regulated for constancy.
Claim 9
Dependent Claim
55 words
A device according to claim 4 further comprising an electrical circuit for braking and mechanical stop means, said mechanical stop means being associated with a shutter button of the camera, and being inoperative during the depression of the shutter button, but operative, when the button is released, to stop the device at a predetermined position.
Claim 10
Dependent Claim
21 words
A device according to claim 5, wherein said predetermined position corresponds to a position in which the shutter is charged up.
Claim 11
Independent Claim
113 words
A device for continuously driving a camera comprising an electric motor, a charge mechanism for film advance and shutter charge, a shutter release mechanism and a power transmission mechanism, said charge mechanism being intermittently driven through a clutch mechanism and said shutter release mechanism being driven from said electric motor during the inoperative period of said charge mechanism, thereby effecting a sequence of picture-taking operations during the revolutions of said motor, and further comprising a Cam for controlling said release mechanism disposed between said electric motor and said clutch mechanism, said cam being effecting to maintain said release mechanism inoperative for a predetermined time after completion of the operation of said charge mechanism.
Claim 12
Independent Claim
113 words
A device for continuously driving a camera comprising an electric motor, a charge mechanism for film advance and shutter charge, a shutter release mechanism and a power transmission mechanism, said charge mechanism being intermittently driven through a clutch mechanism and said shutter release mechanism being driven from said electric motor during the inoperative period of said charge mechanism, thereby effecting a sequence of picture-taking operations during the revolutions of said motor, and further comprising a Cam for controlling said release mechanism disposed between said electric motor and said clutch mechanism, said cam being effecting to maintain said release mechanism inoperative for a predetermined time after completion of the operation of said charge mechanism.
Claim 13
Independent Claim
102 words
A device for continuously driving a camera comprising an electric motor, a charge mechanism for film advance and shutter charge, a shutter release mechanism and a power transmission mechanism, said charge mechanism being intermittently driven through a clutch mechanism and said shutter release mechanism being driven from said electric motor during the inoperative period of said charge mechanism, thereby effecting a sequence of picture-taking operations during the revolutions of said motor, said charge mechanism including a film advance sprocket wheel which may be disconnected from said power transmission mechanism in response to opening of the camera''s back cover and free to rotate.
Claim 14
Independent Claim
102 words
A device for continuously driving a camera comprising an electric motor, a charge mechanism for film advance and shutter charge, a shutter release mechanism and a power transmission mechanism, said charge mechanism being intermittently driven through a clutch mechanism and said shutter release mechanism being driven from said electric motor during the inoperative period of said charge mechanism, thereby effecting a sequence of picture-taking operations during the revolutions of said motor, said charge mechanism including a film advance sprocket wheel which may be disconnected from said power transmission mechanism in response to opening of the camera''s back cover and free to rotate.
Claim 15
Independent Claim
115 words
A device for continuously driving a camera comprising an electric motor, a charge mechanism for film advance and shutter charge, a shutter release mechanism and a power transmission mechanism, said charge mechanism being intermittently driven through a clutch mechanism and said shutter release mechanism being driven from said electric motor during the inoperative period of said charge mechanism, thereby effecting a sequence of picture-taking operations during the revolutions of said motor, said clutch mechanism including a clutch pawl, a ratchet wheel having a plurality of teeth engageable by said pawl, means for causing said clutch pawl to engage said ratchet wheel, and means for disengaging said pawl from said ratchet wheel at a predetermined position.
Claim 16
Independent Claim
115 words
A device for continuously driving a camera comprising an electric motor, a charge mechanism for film advance and shutter charge, a shutter release mechanism and a power transmission mechanism, said charge mechanism being intermittently driven through a clutch mechanism and said shutter release mechanism being driven from said electric motor during the inoperative period of said charge mechanism, thereby effecting a sequence of picture-taking operations during the revolutions of said motor, said clutch mechanism including a clutch pawl, a ratchet wheel having a plurality of teeth engageable by said pawl, means for causing said clutch pawl to engage said ratchet wheel, and means for disengaging said pawl from said ratchet wheel at a predetermined position.
References Cited (Backward Citations)
US2596222A
Cited
US2772941A
Cited
US3135182A
Cited
US3641898A
Cited
US3656420A
Cited
US3705338A
Cited
US3754455A
Cited
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 |