Patent US1590071A successfully refreshed from Google Patents.
Patent US3747490A successfully refreshed from Google Patents.
US3747490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens accessory holder
Assignee: Polaroid Corp
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Filing: 1972-04-24
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Granted: 1973-07-24
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Expires: 1992-04-24
Abstract
Abstract This disclosure explains a concept for a simple accessory holder. The accessory holder, in one embodiment, comprises a wide band having, at each end, a backwardly extending arm with a detent. The accessory holder is made from a springy material so it will snap onto a shutter housing and be held in place by the detents. It comes off by urging the arms apart slightly so the detents come away from the shutter housing. At the center of the band is a hole with means for retaining a filter, a macro lens, and some other lens accessories over an objective lens located in the shutter housing. In one embodiment, the accessory holder and the lens accessory are an integral article.
Inventors
- 👤 E Brandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:36
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B17/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
204 words
A lens accessory, for a photographic camera, adapted for clipping onto the shutter housing of a camera so as to be situate in front of an objective lens mounted in said shutter housing, said lens accessory comprising: optical means for affecting light incident thereon; a lateral band, integral with said optical means, extending the width of said shutter housing; a pair of rearwardly extending arms, each of said arms attached to and integral with opposite extremities of said lateral band; a pair of inwardly extending detents, each of said detents attached to and integral with a different one of said arms, said lateral band, said arms, and said detents fitting closely about said shutter housing and proportioned so said detents engage portions of said shutter housing, whereby said lens accessory attaches to said shutter housing and positions said optical means in front of said objective lens; auxiliary optical means for affecting light directed toward a photocell of an automatic exposure control within said shutter housing proportionally to the effect of said optical means on light entering said objective lens; and extension means, integral with both said lateral band and said auxiliary optical means, for positioning said auxiliary optical means in front of said photocell.
Claim 2
Dependent Claim
204 words
A lens accessory, for a photographic camera, adapted for clipping onto the shutter housing of a camera so as to be situate in front of an objective lens mounted in said shutter housing, said lens accessory comprising: optical means for affecting light incident thereon; a lateral band, integral with said optical means, extending the width of said shutter housing; a pair of rearwardly extending arms, each of said arms attached to and integral with opposite extremities of said lateral band; a pair of inwardly extending detents, each of said detents attached to and integral with a different one of said arms, said lateral band, said arms, and said detents fitting closely about said shutter housing and proportioned so said detents engage portions of said shutter housing, whereby said lens accessory attaches to said shutter housing and positions said optical means in front of said objective lens; auxiliary optical means for affecting light directed toward a photocell of an automatic exposure control within said shutter housing proportionally to the effect of said optical means on light entering said objective lens; and extension means, integral with both said lateral band and said auxiliary optical means, for positioning said auxiliary optical means in front of said photocell.
Claim 3
Dependent Claim
21 words
The lens accessory described in claim 1, wherein it Is made from a transparent and resilient material as a unitary article.
Claim 4
Dependent Claim
15 words
The lens accessory described in claim 2, wherein said optical means is a light filter.
Claim 5
Dependent Claim
19 words
The lens accessory described in claim 2, wherein said optical means is an auxiliary lens for said objective lens.
Claim 6
Dependent Claim
31 words
The lens accessory holder described in claim 1, further comprising means, attached to said band, for positioning an optical element in front of a flash bulb surmounted on said shutter housing.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |