Patent US3959508A successfully refreshed from Google Patents.
US4176933A
Expired / Lapsed
US
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Indicating apparatus for camera
Assignee: Nikon Corp
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Filing: 1978-03-06
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Granted: 1979-12-04
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Expires: 1998-03-06
Abstract
Abstract An indicating apparatus comprises a switching means provided in connection with a flash device and generating a ready-light signal when the charging of the flash device is completed. A ready lamp composed of a light-emitting diode is lighted upon receipt of the ready-lamp signal. An another switching means is provided in connection of a shutter dial of the camera and is connected to produce a synchronization signal when the shutter speed is selected in a state synchronizable with the flash from the flash device. A synchronization indicating lamp is composed of a light-emitting diode to be lighted upon receipt of the synchronization signal.
Inventors
- 👤 Sakuji Watanabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:48
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/18; G03B17/20; G03B15/00; G03B15/02; G03B15/03; G03B15/05; G03B2215/00; G03B2215/05
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
174 words
An indicating apparatus for indicating the completion of charging of a capacitor of a flash device to be actuated in connection with the shutter release of a camera and also for indicating that the shutter speed selected by a shutter speed setting means of the camera is synchronizable with the light from the flash device, comprising an illuminable indicating element capable of being placed in different states, and operating means responsive to the charging of said capacitor and to said shutter speed setting means for causing said indicating element to have a predetermined first state when charging of said capacitor is complete and the selected shutter speed is synchronizable with the light from said flash device, for causing said indicating element to have a predetermined second state when charging of said capacitor is complete and the selected shutter speed is non-synchronizable with the light from said flash device, and for causing said indicating element to have neither of said first and second states when charging of said capacitor is in process but is incomplete.
Claim 2
Dependent Claim
174 words
An indicating apparatus for indicating the completion of charging of a capacitor of a flash device to be actuated in connection with the shutter release of a camera and also for indicating that the shutter speed selected by a shutter speed setting means of the camera is synchronizable with the light from the flash device, comprising an illuminable indicating element capable of being placed in different states, and operating means responsive to the charging of said capacitor and to said shutter speed setting means for causing said indicating element to have a predetermined first state when charging of said capacitor is complete and the selected shutter speed is synchronizable with the light from said flash device, for causing said indicating element to have a predetermined second state when charging of said capacitor is complete and the selected shutter speed is non-synchronizable with the light from said flash device, and for causing said indicating element to have neither of said first and second states when charging of said capacitor is in process but is incomplete.
Claim 3
Dependent Claim
27 words
An indicating apparatus in accordance with claim 1, wherein said first state is a constant illumination state and said second state is a repetitively varying illumination state.
Claim 4
Dependent Claim
107 words
An indicating apparatus in accordance with claim 2, wherein said operating means causes said indicating element to be illuminated by alternating weak and strong illumination when charging of said capacitor is complete and when the selected shutter speed is non-synchronizable with the light from said flash device, causes said indicating element to be illuminated and extinguished alternately when charging of said capacitor is incomplete and the selected shutter speed is non-synchronizable with the light from said flash device, and causes said indicating element to be extinguished when charging of said capacitor is incomplete and the selected shutter speed is synchronizable with the light from said flash device.
Claim 5
Dependent Claim
66 words
An indicating apparatus in accordance with claim 2, wherein said operating means comprises first switch means for supplying a steady voltage to said indicating element when charging of said capacitor is complete, oscillator means for supplying a varying voltage to said indicating element, and second switch means for actuating said oscillator means when the selected shutter speed is non-synchronizable with the light from said flash device.
Claim 6
Dependent Claim
32 words
An indicating apparatus in accordance with claim 4, further comprising means for preventing said oscillator means from supplying said varying voltage to said indicating element when charging of said capacitor is complete.
Claim 7
Dependent Claim
28 words
An indicating apparatus in accordance with claim 5, wherein the last-mentioned means comprises third switch means responsive to the supplying of said steady voltage to said indicating element.
Claim 8
Dependent Claim
50 words
An indicating apparatus in accordance with claim 4, wherein said first switch means connects a source of voltage to said indicating element in a first circuit and wherein said second switch means connects said oscillator means to said indicating element in a second circuit, said circuits being arranged in parallel.
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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) | 1982-12-03 | 1983-06-04 | 1983-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-03 | 1987-06-04 | 1987-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-03 | 1991-06-04 | 1991-12-04 | $7700.00 | Window Closed / Lapsed |