US3733986A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for ascertaining charging on electronic flash unit
Assignee: Minolta Co Ltd
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Filing: 1970-11-25
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Granted: 1973-05-22
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Expires: 1990-11-25
Abstract
Abstract A device is provided with a light-transmitting rod for conducting light from a charge-indicating lamp on an electronic flash unit into the field of view of the camera viewfinder. One end of the light-transmitting member is positioned in front of the viewfinder lens system to introduce the light from the charge indicating lamp into the part of the field of view of the viewfinder outside of the scene-delineating frame, thereby to enable the operator to ascertain completion of charging while using the viewfinder.
Inventors
- 👤 T Hayashi
- 👤 K Maeda
- 👤 Y Ohta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:41
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/18; G03B17/20; G03B15/00; G03B15/02; G03B15/03; G03B15/05; G03B2215/00; G03B2215/05; G03B2215/0514
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
123 words
In the combination of a photographic camera provided with an accessory shoe and a viewfinder having a scene delineating frame and an electronic flash unit to be detachably mounted on said accessory shoe and having a charge indicating lamp, a device comprising means supported by a holder adapted to be extended from and retracted into said electronic flash unit and enabling the operator to see the light from said charge indicating lamp within said viewfinder when said electronic flash unit is mounted on said accessory shoe, said means being disposed in front of the viewfinder lens system of said camera and adapted to introduce the light from said charge indicating lamp into the light path of said viewfinder outside said scene delineating frame.
Claim 2
Dependent Claim
123 words
In the combination of a photographic camera provided with an accessory shoe and a viewfinder having a scene delineating frame and an electronic flash unit to be detachably mounted on said accessory shoe and having a charge indicating lamp, a device comprising means supported by a holder adapted to be extended from and retracted into said electronic flash unit and enabling the operator to see the light from said charge indicating lamp within said viewfinder when said electronic flash unit is mounted on said accessory shoe, said means being disposed in front of the viewfinder lens system of said camera and adapted to introduce the light from said charge indicating lamp into the light path of said viewfinder outside said scene delineating frame.
Claim 3
Dependent Claim
118 words
In the combination of a photographic camera provided with an accessory shoe and a viewfinder having a scene delineating frame and an electronic flash unit to be detachably mounted on said accessory shoe and having a charge indicating lamp, a device comprising means positioned below the front bottom of said flash unit and disposed in front of said finder when said electronic flash unit is attached to said accessory shoe for introducing the light of said charge indicating lamp into the light path of said finder outside said scene delineating frame, said means comprising a light transmitting rod having one end facing said charge indicating lamp and the other end disposed in the light path of said viewfinder.
Claim 4
Dependent Claim
118 words
In the combination of a photographic camera provided with an accessory shoe and a viewfinder having a scene delineating frame and an electronic flash unit to be detachably mounted on said accessory shoe and having a charge indicating lamp, a device comprising means positioned below the front bottom of said flash unit and disposed in front of said finder when said electronic flash unit is attached to said accessory shoe for introducing the light of said charge indicating lamp into the light path of said finder outside said scene delineating frame, said means comprising a light transmitting rod having one end facing said charge indicating lamp and the other end disposed in the light path of said viewfinder.
Claim 5
Dependent Claim
32 words
The device of claim 2, comprising further a light transmitting rod, one end of which faces said charge indicating lamp and the other is disposed on the rear of said flash unit.
Claim 6
Dependent Claim
104 words
In the combination of a photographic camera provided with an accessory shoe and a viewfinder having a scene delineating frame and an electronic flash unit to be detachably mounted on said accessory shoe and having a charge indicating lamp, a device comprising means positioned below the front bottom of said flash unit and disposed in front of said finder when said electronic flash unit is attached to said accessory shoe for introducing the light of said charge indicating lamp into the light path of said finder outside said scene delineating frame, said charge indicating lamp being disposed in the light path of said viewfinder.
Claim 7
Dependent Claim
104 words
In the combination of a photographic camera provided with an accessory shoe and a viewfinder having a scene delineating frame and an electronic flash unit to be detachably mounted on said accessory shoe and having a charge indicating lamp, a device comprising means positioned below the front bottom of said flash unit and disposed in front of said finder when said electronic flash unit is attached to said accessory shoe for introducing the light of said charge indicating lamp into the light path of said finder outside said scene delineating frame, said charge indicating lamp being disposed in the light path of said viewfinder.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |