Patent US3611900A successfully refreshed from Google Patents.
US3611900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch means for electric shutter
Assignee: Hattori Tokeiten KK
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Filing: 1968-12-30
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Granted: 1971-10-12
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Expires: 1988-12-30
Abstract
Abstract A timing circuit disconnect apparatus in a camera utilizing a timing circuit for operating the camera shutter and an electrical energy source for supplying electrical energy for the timing circuit, the disconnect apparatus including a switch connected in series between the timing circuit and the electrical energy source, which switch is opened at the termination of the shutter operation, and held open until a film winding mechanism is actuated. The disconnect apparatus includes a locking lever selectively engageable with a movable release arm that is connected to the film winding mechanism, the locking lever being arranged to lock the trigger lever in its actuated mode until the winding means is actuated to move the release arm, which in turn moves the locking lever to unlock the trigger lever and release the trigger lever from its actuated mode.
Inventors
- 👤 Kiyoshi Kitai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:58
CPC Classifications
G; G03; G03B; G03B9/00; G03B9/64; G03B7/00; G03B7/003
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
223 words
In a camera having a shutter and electrical circuitry for controlling the operation of the camera shutter, film winding means, a self-contained electrical energy source, a timing circuit energized by said electrical energy source, means for actuating the camera shutter including a manually operable trigger lever, means operable by said manually operable trigger lever for opening said shutter, means including said timing circuit for closing said shutter, and means for preventing said energization of said timing circuit before said film winding means is actuated preparatory to actuating the camera shutter, the improvement wherein said means for preventing said energization of said timing circuit comprises; a switch connected in series between said timing circuit and said electrical energy source, and mechanical means for engaging and opening said switch upon said closing of said shutter, said mechanical means including means for holding said switch open until said film winding means is actuated, and having a switch contact arm, spring biased movable cam means selectively engageable with said switch contact arm for moving said arm to open said switch, means for holding said cam away from engagement with said switch contact arm, and means coupled to said trigger lever for releasing said cam holding means to allow said cam to engage said switch contact arm to open said switch when said trigger lever is manually operated.
Claim 2
Dependent Claim
223 words
In a camera having a shutter and electrical circuitry for controlling the operation of the camera shutter, film winding means, a self-contained electrical energy source, a timing circuit energized by said electrical energy source, means for actuating the camera shutter including a manually operable trigger lever, means operable by said manually operable trigger lever for opening said shutter, means including said timing circuit for closing said shutter, and means for preventing said energization of said timing circuit before said film winding means is actuated preparatory to actuating the camera shutter, the improvement wherein said means for preventing said energization of said timing circuit comprises; a switch connected in series between said timing circuit and said electrical energy source, and mechanical means for engaging and opening said switch upon said closing of said shutter, said mechanical means including means for holding said switch open until said film winding means is actuated, and having a switch contact arm, spring biased movable cam means selectively engageable with said switch contact arm for moving said arm to open said switch, means for holding said cam away from engagement with said switch contact arm, and means coupled to said trigger lever for releasing said cam holding means to allow said cam to engage said switch contact arm to open said switch when said trigger lever is manually operated.
Claim 3
Dependent Claim
213 words
In a camera having a shutter and electrical circuitry for controlling the operation of the camera shutter, film winding means, a self-contained electrical energy source, a timing circuit energized by said electrical energy source, means for actuating the camera shutter including a manually operable trigger lever, means operable by said manually operable trigger lever for opening said shutter, means including said timing circuit for closing said shutter, and means for preventing said energization of said timing circuit before said film winding means is actuated preparatory to actuating the camera shutter, the improvement wherein said means for preventing said energization of said timing circuit comprisEs a switch connected in series between said timing circuit and said electrical energy source, and mechanical means for engaging and opening said switch upon said closing of said shutter, said mechanical means including means for holding said switch open until said film winding means is actuated and having an electromagnetically controlled pawl means, connected to said timing circuit for energization and deenergization, respectively, in response to opening and closing of said shutter, and movable cam means controlled by said pawl means, said movable cam means being arranged to open said switch after said cam means is released by said pawl means in response to the closing of said shutter.
Claim 4
Dependent Claim
213 words
In a camera having a shutter and electrical circuitry for controlling the operation of the camera shutter, film winding means, a self-contained electrical energy source, a timing circuit energized by said electrical energy source, means for actuating the camera shutter including a manually operable trigger lever, means operable by said manually operable trigger lever for opening said shutter, means including said timing circuit for closing said shutter, and means for preventing said energization of said timing circuit before said film winding means is actuated preparatory to actuating the camera shutter, the improvement wherein said means for preventing said energization of said timing circuit comprisEs a switch connected in series between said timing circuit and said electrical energy source, and mechanical means for engaging and opening said switch upon said closing of said shutter, said mechanical means including means for holding said switch open until said film winding means is actuated and having an electromagnetically controlled pawl means, connected to said timing circuit for energization and deenergization, respectively, in response to opening and closing of said shutter, and movable cam means controlled by said pawl means, said movable cam means being arranged to open said switch after said cam means is released by said pawl means in response to the closing of said shutter.
Claim 5
Dependent Claim
176 words
In a photographic camera including a shutter, trigger means for movement from a set position to an actuated position to initiate an exposure by opening said shutter, an electric delay circuit for controlling the exposure period, a power source for energizing said electric delay circuit, and a film winding mechanism, the improvement comprising: first and second switch means connected in series between said electric delay circuit and power source, means coupled to said trigger means for closing said first switch means in response to said movement of said trigger means to said actuated position, exposure terminating means responsive to said electric delay circuit for closing said shutter, means coupled to said exposure terminating means for opening said second switch means in response to an exposure termination, locking means for releasably holding said trigger means in said actuated position to maintain said first switch means in said closed condition, releasing means coupled to said film winding mechanism for releasing said locking means, and means for returning said trigger means from said actuated position to said set position.
Claim 6
Dependent Claim
176 words
In a photographic camera including a shutter, trigger means for movement from a set position to an actuated position to initiate an exposure by opening said shutter, an electric delay circuit for controlling the exposure period, a power source for energizing said electric delay circuit, and a film winding mechanism, the improvement comprising: first and second switch means connected in series between said electric delay circuit and power source, means coupled to said trigger means for closing said first switch means in response to said movement of said trigger means to said actuated position, exposure terminating means responsive to said electric delay circuit for closing said shutter, means coupled to said exposure terminating means for opening said second switch means in response to an exposure termination, locking means for releasably holding said trigger means in said actuated position to maintain said first switch means in said closed condition, releasing means coupled to said film winding mechanism for releasing said locking means, and means for returning said trigger means from said actuated position to said set position.
Claim 7
Dependent Claim
44 words
A photographic camera as set forth in claim 3, in which said exposure terminating means includes an electromagnet having a coil connected to said electric delay circuit, and switch closing means rotatably mounted adjacent said electromagnet for movement thereby to open said second switch.
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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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |