US3791277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching apparatus for electric shutter mechanisms
Assignee: Minolta Co Ltd
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Filing: 1973-03-08
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Granted: 1974-02-12
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Expires: 1993-03-08
Abstract
Abstract An electric shutter switching mechanism includes a first switch for selectively connecting a storage element with a light measuring circuit and a second switch for selectively connecting a timing circuit for closing the shutter with an electric power source. An operating member is movable between first and second positions which respectively represent the viewing condition and the photographing condition of the camera. The member interlocking with the operating member actuates the first switch to electrically isolate the storage element from the light measuring circuit and actuates the second switch to connect the timing circuit to the electric power source. With the operating member in the second position the interconnection between the members and the shutter releasing operation is terminated.
Inventors
- 👤 T Kobori
- 👤 M Ohba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:11
CPC Classifications
G; G03; G03B; G03B7/00; G03B7/08; G03B7/081; G03B7/083; G03B9/00; G03B9/58
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
350 words
In a single lens reflex camera operable in a viewing condition and a photographing condition and comprising a light measuring circuit having a light receptive element for receiving light from an object to be photographed through an objective lens and for generating an output voltage representative of the object light intensity, means for storing said output voltage, and means for timing the closing of a shutter in accordance with said stored voltage, and a switch mechanism including a first switch for selectively connecting said means for storing and said light measuring circuit and a second switch for selectively connecting said means for timing the closing of the shutter and an electric power source, comprising: an operating member movable between a first position and a second position respectively representing said viewing condition and said photographing condition; an interlocking member interlocking with said operating member and movable between a first position for restraining said operating member in said first position and a second position for allowing said operating member to move to said second position thereof and being retained in said second position when said operating member is located in said second position thereof; means responsive to shutter releasing operation to move from a first position thereof to a second position thereof; means for interconnecting said means responsive to shutter release operation with said interlocking member for moving the latter from said first position to said second position thereof with the movement of the former from said first position to said second position thereof; means for actuating said first switch to electrically isolate said means for storing from said light measuring circuit and said second switch to electrically connect said means for timing the closing of said shutter to said electric power source with said interlocking member moving from said first position to said second position thereof; means for releasing the interconnection between said means responsive to shutter releasing operation and said interlocking member when said operating member is located in said second position; and means for pOsitioning said operating member in said first position in response to the termination of exposure.
Claim 2
Dependent Claim
350 words
In a single lens reflex camera operable in a viewing condition and a photographing condition and comprising a light measuring circuit having a light receptive element for receiving light from an object to be photographed through an objective lens and for generating an output voltage representative of the object light intensity, means for storing said output voltage, and means for timing the closing of a shutter in accordance with said stored voltage, and a switch mechanism including a first switch for selectively connecting said means for storing and said light measuring circuit and a second switch for selectively connecting said means for timing the closing of the shutter and an electric power source, comprising: an operating member movable between a first position and a second position respectively representing said viewing condition and said photographing condition; an interlocking member interlocking with said operating member and movable between a first position for restraining said operating member in said first position and a second position for allowing said operating member to move to said second position thereof and being retained in said second position when said operating member is located in said second position thereof; means responsive to shutter releasing operation to move from a first position thereof to a second position thereof; means for interconnecting said means responsive to shutter release operation with said interlocking member for moving the latter from said first position to said second position thereof with the movement of the former from said first position to said second position thereof; means for actuating said first switch to electrically isolate said means for storing from said light measuring circuit and said second switch to electrically connect said means for timing the closing of said shutter to said electric power source with said interlocking member moving from said first position to said second position thereof; means for releasing the interconnection between said means responsive to shutter releasing operation and said interlocking member when said operating member is located in said second position; and means for pOsitioning said operating member in said first position in response to the termination of exposure.
Claim 3
Dependent Claim
53 words
A single lens reflex camera as in claim 1, wherein said first switch connects said means for storing to said light measuring circuit and said second switch isolates said means for timing the closing of the shutter from said electric power source when said interlocking member is located in said first position thereof.
Claim 4
Dependent Claim
60 words
A single lens reflex camera as in claim 1, wherein said operating member includes a rod slidable relative to the camera body from a first position to a second position and is biased to said second position by a spring, a cam plate rotatable together with a member for terminating exposure, and a member for engaging with said cam plate.
Claim 5
Dependent Claim
94 words
A single lens reflex camera as in claim 3, wherein said rod includes a projection having a slot, said interlocking member is composed of a lever supported rotatably by a pin on the camera body and provided with first and second edges for engaging with said slot through a step for restraining said operating member in said first position thereof, and said interlocking member is positioned in said first position thereof when said first edge engages with said slot and positioned in said second position thereof when said second edge engages with said slot.
Claim 6
Dependent Claim
81 words
A single lens reflex camera as in claim 1, wherein said means for timing the closing of a shutter in accordance with said stored voltage includes a switching circuit and electromagnetic means for triggering a closing member of the shutter to terminate exposure in response to the actuation of said switching circuit, and said second switch isolates said electromagnetic means from said electric power source with the movement of said interlocking member from said second position to said first position thereof.
Claim 7
Dependent Claim
217 words
In a single lens reflex camera operable in a viewing condition and a photographing condition and comprising a light measuring circuit having a light receptive element for receiving light from an object to be photographed through an objective lens and for generating an output voltage representative of the object light intensity, means for storing said output voltage, and means for timing the closing of a shutter in accordance with said stored voltage, and a switch mechanism including a switch for selectively connecting said means for storing and said light measuring circuit, comprising: an operating member movable between a first position and a second position respectively representing said viewing condition and said photographing position; means for retaining said operating member in said first position; means movable from a first position to a second position for releasing the retainment of said operating member in response to shutter releasing operation; means following said movable means for actuating said switch to electrically isolate said means for storing from said light measuring circuit with said movable means moving from said first position to said second position; said means for retaining said movable means and said following means actuating said switch prior to the releasing of said operating member; and means for restraining said following means in the position for actuating said switch.
Claim 8
Dependent Claim
217 words
In a single lens reflex camera operable in a viewing condition and a photographing condition and comprising a light measuring circuit having a light receptive element for receiving light from an object to be photographed through an objective lens and for generating an output voltage representative of the object light intensity, means for storing said output voltage, and means for timing the closing of a shutter in accordance with said stored voltage, and a switch mechanism including a switch for selectively connecting said means for storing and said light measuring circuit, comprising: an operating member movable between a first position and a second position respectively representing said viewing condition and said photographing position; means for retaining said operating member in said first position; means movable from a first position to a second position for releasing the retainment of said operating member in response to shutter releasing operation; means following said movable means for actuating said switch to electrically isolate said means for storing from said light measuring circuit with said movable means moving from said first position to said second position; said means for retaining said movable means and said following means actuating said switch prior to the releasing of said operating member; and means for restraining said following means in the position for actuating said switch.
Claim 9
Dependent Claim
141 words
A single lens reflex camera as in claim 6, wherein said following means is interconnected with said means for retaining to move therewith, and said means for retaining is movable between a first position for retaining said operating member in said first position thereof and a second position for allowing said operating member to move to said second position and is interlocked with said movable means to move therewith when the latter moves from the first position to the second position thereof, and further comprising means for restraining said means for retaining in said second position thereof with said operating member in said second position thereof, and means for disconnecting said means for retaining from said following means so that said means for retaining may return regardless of said movable means when said operating member returns from said second position thereof.
Claim 10
Dependent Claim
34 words
A single lens reflex camera as in claim 6, further comprising means for preventing said movable means from returning to said first position thereof when said operating member is in said first position thereof.
Claim 11
Dependent Claim
48 words
A single lens reflex camera as in claim 8, wherein said means for retaining retains said operating member in their respective first positions and vice versa in their respective second positions, and the operating member includes said means for disconnecting said means for retaining from said following means.
Claim 12
Dependent Claim
288 words
In a single lens reflex camera operable in a viewing condition and a photographing condition and comprising a light measuring circuit having a light receptive element for receiving light from an object to be photographed through an objective lens and for generating an output voltage representative of the object light intensity, means for storing said output voltage, and means for timing the closing of a shutter in accordance with said stored voltage, and a switch mechanism including a switch for selectively connecting said means for storing and said light measuring circuit, comprising: an operating member movable between a first position and a second position respectively representing said viewing condition and said photographing position; means movable between a first position for retaining said operating member in said first position and a second position for allowing said operating member to move to said second position; means responsive to shutter releasing operation to bring said movable means from said first to said second position thereof to release the retainment of said operating member; means for restraining said movable means in said second position thereof with said operating member in said second position thereof; means for releasing said means for restraining with said operating member returning from said second position; means for disconnecting said movable means from said responsive means so that said movable means may return regardless of said responsive means when said operating member returns from said second position thereof; and means for actuating said switch to electrically isolate said means for storing from said light measuring circuit with said movable means moving from said first position to said second position, said movable means and said means for actuating operating said switch prior to the releasing of said operating member.
Claim 13
Dependent Claim
288 words
In a single lens reflex camera operable in a viewing condition and a photographing condition and comprising a light measuring circuit having a light receptive element for receiving light from an object to be photographed through an objective lens and for generating an output voltage representative of the object light intensity, means for storing said output voltage, and means for timing the closing of a shutter in accordance with said stored voltage, and a switch mechanism including a switch for selectively connecting said means for storing and said light measuring circuit, comprising: an operating member movable between a first position and a second position respectively representing said viewing condition and said photographing position; means movable between a first position for retaining said operating member in said first position and a second position for allowing said operating member to move to said second position; means responsive to shutter releasing operation to bring said movable means from said first to said second position thereof to release the retainment of said operating member; means for restraining said movable means in said second position thereof with said operating member in said second position thereof; means for releasing said means for restraining with said operating member returning from said second position; means for disconnecting said movable means from said responsive means so that said movable means may return regardless of said responsive means when said operating member returns from said second position thereof; and means for actuating said switch to electrically isolate said means for storing from said light measuring circuit with said movable means moving from said first position to said second position, said movable means and said means for actuating operating said switch prior to the releasing of said operating member.
Claim 14
Dependent Claim
27 words
A single lens reflex camera as in claim 10, wherein said means for actuating said switch is a member interlocked with said movable means to move therewith.
Claim 15
Dependent Claim
46 words
A single lens reflex camera as in claim 11, wherein said movable means retains said operating member in their respective first positions and vice versa in their respective second positions, and said operating member includes said means for disconnecting said movable means from said responsive 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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |