US3777636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic shutter in camera
Assignee: Minolta Co Ltd
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Filing: 1971-06-24
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Granted: 1973-12-11
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Expires: 1991-06-24
Abstract
Abstract The device includes an electromagnet and an arresting member for a sector driving member and a closing effecting member. The electromagnet is energized by closing the switch of an exposure time control circuit to release the shutter and deenergized under the control of the exposure time control circuit. When attracted upon energization of the electromagnet, the arresting member permits the sector driving member to move in the shutter opening direction, and when the electromagnet is deenergized, the arresting member returns under the action of a restoring spring and initiates the closing effecting member into movement in the shutter closing direction. Thus the initiation of opening and closing of the shutter is controlled by the above-mentioned only one electromagnet.
Inventors
- 👤 T Imura
- 👤 Y Fujii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:54
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/58
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
371 words
A camera electronic shutter mechanism comprising shutter sectors; a rotatable shutter opening means urged to rotate in an advance direction from a cocked position to a released position to drive said shutter sectors to a shutter opened position and including a sector driving means for closing the shutter when at the cocked position and opening the shutter when at the released position; a rotatable shutter closing means urged to rotate from a cocked position to a released position to drive said shutter sectors to a shutter closed position and including a closing driving member for rotating said sector driving member from the released position to the cocked position in rotating of said closing driving member from the cocked position to the released position; a start switch closed in relation to shutter release; a timing circuit including a photocell responsive to the amount of light incident thereon; means including a trigger switch actuated in response to the actuation of said shutter opening means for triggering said timing circuit; an electromagnet; means including a switching circuit for energizing said electromagnet in response to the closing of said start switch and deenergizing said electromagnet an interval responsive to said timing circuit following the actuation of said trigger switch; a first arresting means for latching said shutter closing means in its cocked position and releasing said shutter closing means in relation to the actuation of said shutter opening means; and a second arresting means transferable between a first position latching said shutter opening means and a second position latching said shutter closing means, and normally urged to said first position to latch said shutter opening means in cocked position, said second arresting means being actuable by the energization of said electromagnet and moved from the first position to the second position to permit the advance of said shutter opening means, said first arresting means being responsive to the advance of said shutter opening means to move said first arresting means to its release position of said shutter closing means, with said second arresting means being in said second position latching said shutter closing means, said second arresting means being returnable to the first position upon deenergization of said electromagnet to release said shutter closing means.
Claim 2
Dependent Claim
371 words
A camera electronic shutter mechanism comprising shutter sectors; a rotatable shutter opening means urged to rotate in an advance direction from a cocked position to a released position to drive said shutter sectors to a shutter opened position and including a sector driving means for closing the shutter when at the cocked position and opening the shutter when at the released position; a rotatable shutter closing means urged to rotate from a cocked position to a released position to drive said shutter sectors to a shutter closed position and including a closing driving member for rotating said sector driving member from the released position to the cocked position in rotating of said closing driving member from the cocked position to the released position; a start switch closed in relation to shutter release; a timing circuit including a photocell responsive to the amount of light incident thereon; means including a trigger switch actuated in response to the actuation of said shutter opening means for triggering said timing circuit; an electromagnet; means including a switching circuit for energizing said electromagnet in response to the closing of said start switch and deenergizing said electromagnet an interval responsive to said timing circuit following the actuation of said trigger switch; a first arresting means for latching said shutter closing means in its cocked position and releasing said shutter closing means in relation to the actuation of said shutter opening means; and a second arresting means transferable between a first position latching said shutter opening means and a second position latching said shutter closing means, and normally urged to said first position to latch said shutter opening means in cocked position, said second arresting means being actuable by the energization of said electromagnet and moved from the first position to the second position to permit the advance of said shutter opening means, said first arresting means being responsive to the advance of said shutter opening means to move said first arresting means to its release position of said shutter closing means, with said second arresting means being in said second position latching said shutter closing means, said second arresting means being returnable to the first position upon deenergization of said electromagnet to release said shutter closing means.
Claim 3
Dependent Claim
63 words
The device as set forth in claim 1 wherein said electric shutter is equipped with means for indicaTing completion of an exposure, said means comprising a mechanical signal generator provided on a member for driving the sector at least in the shutter closing direction and a lamp to be lighted by said mechanical signal generator for indicating at least completion of an exposure.
Claim 4
Dependent Claim
50 words
The device as set forth in claim 2 wherein said mechanical signal generator comprises a projection formed on said member for driving the sectors at least in the shutter closing direction and a switch to be actuated by said projection to open and close the electric circuit of said lamp.
Claim 5
Dependent Claim
70 words
The device as set forth in claim 2 wherein said mechanical generator comprises a recess formed in said member for driving the sectors at least in the shutter closing direction and a switch having an actuating member to engage in said recess and to be pushed out of said recess by the movement of said member for driving the sectors so as to close the electric circuit of said lamp.
Claim 6
Dependent Claim
47 words
The electronic shutter device as set forth in claim 1 wherein said shutter closing means includes a rotatable closing effecting member, said closing effecting member transmitting the rotation motion of said closing driving member from the cocked position to the released position to said sector driving member.
Claim 7
Dependent Claim
364 words
An electronic shutter device in a camera comprising shutter sectors; a shutter opening means including a shutter ring for opening and closing the shutter by reciprocation between a first position closing said shutter sectors and a second position opening said shutter sectors, and means urging said shutter ring to move from the first position to the second position; a shutter closing means urged to rotate from a cocked to a released position for moving said shutter ring from the second position to the first position with the rotation of said shutter closing means from the cocked position to the released position; an electromagnet; an exposure time control circuit for controlling the energization and demagnetization of said electromagnet, said circuit including a start switch closed in relation to shutter release, a timing circuit including a photocell responsive to incident light, a trigger switch actuated in response to the actuation of said shutter opening means to trigger said timing circuit, and a switching circuit for energizing said electomagnet on the closing of said start switch and deenergizing said electromagnet an interval responsive to said timing circuit, following the actuation of said trigger switch; a first arresting means for latching said shutter closing means at the cocked position and releasing said shutter closing means in relation to the actuation of said shutter opening means; and a second arresting means movable between a first position latching said shutter opening means at its first position and freeing the rotation of said shutter closing means and a second position releasing the latching of said shutter opening means and latching the rotation of said shutter closing means and normally urged toward the first position; said second arresting means being actuated by the energizing of said electromagnet to move from the first position to the second position to actuate said shutter opening means; said shutter closing means being released by said first arresting means in relation to the actuation of said shutter opening means and being latched by said second arresting means positioned at the second position; and said second arresting means being urged to return to the first position by the deenergization of said electromagnet to release said shutter closing means.
Claim 8
Dependent Claim
364 words
An electronic shutter device in a camera comprising shutter sectors; a shutter opening means including a shutter ring for opening and closing the shutter by reciprocation between a first position closing said shutter sectors and a second position opening said shutter sectors, and means urging said shutter ring to move from the first position to the second position; a shutter closing means urged to rotate from a cocked to a released position for moving said shutter ring from the second position to the first position with the rotation of said shutter closing means from the cocked position to the released position; an electromagnet; an exposure time control circuit for controlling the energization and demagnetization of said electromagnet, said circuit including a start switch closed in relation to shutter release, a timing circuit including a photocell responsive to incident light, a trigger switch actuated in response to the actuation of said shutter opening means to trigger said timing circuit, and a switching circuit for energizing said electomagnet on the closing of said start switch and deenergizing said electromagnet an interval responsive to said timing circuit, following the actuation of said trigger switch; a first arresting means for latching said shutter closing means at the cocked position and releasing said shutter closing means in relation to the actuation of said shutter opening means; and a second arresting means movable between a first position latching said shutter opening means at its first position and freeing the rotation of said shutter closing means and a second position releasing the latching of said shutter opening means and latching the rotation of said shutter closing means and normally urged toward the first position; said second arresting means being actuated by the energizing of said electromagnet to move from the first position to the second position to actuate said shutter opening means; said shutter closing means being released by said first arresting means in relation to the actuation of said shutter opening means and being latched by said second arresting means positioned at the second position; and said second arresting means being urged to return to the first position by the deenergization of said electromagnet to release said shutter closing means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |