US3635136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot lamp unit for use with an electronic flashlight
Assignee: Nikon Corp
•
Filing: 1969-09-09
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Granted: 1972-01-18
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Expires: 1989-09-09
Abstract
Abstract A pilot lamp unit, for use with an electronic flash gun, attachable to a camera, having a viewfinder. The unit includes a pilot lamp, a first member having a reflecting surface for receiving light from the pilot lamp and directing it to the viewfinder in a first direction, a second member having at least one reflecting surface for receiving light from the pilot lamp and directing it to the viewfinder in a second direction, whereby the operator can readily observe the light regardless of whether the camera is horizontally or vertically positioned.
Inventors
- 👤 Kunihiko Hori
- 👤 Keno Okuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:29
CPC Classifications
G; G03; G03B; G03B15/00; G03B15/02; G03B15/03; G03B15/05; G03B2215/00; G03B2215/05; G03B2215/0514; G03B2215/056
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
98 words
A pilot lamp unit attachable to a camera for use with an electronic flash gun comprising: a retaining ring provided coaxially to the eyepiece of the camera viewfinder, a lamp holder having an attaching portion detachably supported by said retaining ring and a lamp housing provided about said attaching portion, a pilot lamp provided in said lamp housing and connected to the flash gun by the electrical cable extending therefrom, reflecting means provided in said lamp housing and including at least two reflecting surfaces for directing the light to the eye of an observer from two different directions.
Claim 2
Dependent Claim
98 words
A pilot lamp unit attachable to a camera for use with an electronic flash gun comprising: a retaining ring provided coaxially to the eyepiece of the camera viewfinder, a lamp holder having an attaching portion detachably supported by said retaining ring and a lamp housing provided about said attaching portion, a pilot lamp provided in said lamp housing and connected to the flash gun by the electrical cable extending therefrom, reflecting means provided in said lamp housing and including at least two reflecting surfaces for directing the light to the eye of an observer from two different directions.
Claim 3
Dependent Claim
94 words
A pilot lamp unit according to claim 1, wherein said reflecting means is a light conductive plate of transparent substAnce formed in T-shape having three transparent surfaces and three reflecting surfaces, a pair of surfaces of said transparent surfaces facing to said pilot lamp and a remaining surface to the eye, one surface of said reflecting surfaces directing the light passing through one surface of said pair of transparent surfaces to the eye, and remaining reflecting surfaces directing the light passing through the other surface of said pair of transparent surfaces to the eye.
Claim 4
Dependent Claim
91 words
A pilot lamp unit, for use with an electronic flash gun, attachable to a camera having a viewfinder, the combination comprising a pilot lamp, a first member having means for deflecting the path of light, means mounting said first member for receiving light from said pilot lamp and directing it to said viewfinder in a first direction, a second member having means for deflecting the path of light, means mounting said second member for receiving light from said pilot lamp and directing it to said viewfinder in a second diverse direction.
Claim 5
Dependent Claim
91 words
A pilot lamp unit, for use with an electronic flash gun, attachable to a camera having a viewfinder, the combination comprising a pilot lamp, a first member having means for deflecting the path of light, means mounting said first member for receiving light from said pilot lamp and directing it to said viewfinder in a first direction, a second member having means for deflecting the path of light, means mounting said second member for receiving light from said pilot lamp and directing it to said viewfinder in a second diverse direction.
Claim 6
Dependent Claim
25 words
A pilot lamp unit according to claim 3 wherein said second direction is at an angle of substantially 90* with respect to said first direction.
Claim 7
Dependent Claim
27 words
A pilot lamp unit according to claim 3 wherein said first member having means for deflecting the path of light is a member having a reflecting surface.
Claim 8
Dependent Claim
60 words
A pilot lamp unit according to claim 3 wherein said second member is at least a semitransparent member having a first reflecting surface for receiving from said pilot lamp, a second spaced reflecting surface for receiving light from said first reflecting surface and directing it to said viewfinder at an angle of substantially 90* with respect to said first direction.
Claim 9
Dependent Claim
23 words
A pilot lamp unit according to claim 3 wherein said first and second members are fabricated from a unitary at least semitransparent member.
References Cited (Backward Citations)
US3393620A
Cited
US3416422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |