US4302078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic filter holder with threaded adapter
Assignee: Photographic Peripherals Inc
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Filing: 1979-10-18
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Granted: 1981-11-24
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Expires: 1999-10-18
Abstract
Abstract A filter holder having a plurality of slots therein for receiving filters, photographic effect sheets, or the like, and an adapter which is removably retained in one of said slots for threadably engaging a threaded front portion of a photographic lens. A lens cover element is provided which snapingly engages in the filter holder, and a rotatable filter is engaged in the filter holder and retained by the adapter, the filter being rotatable even in its engaged condition. A lens shade is provided which snapingly and removably engages the filter holder.
Inventors
- 👤 David M. Stravitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:13
CPC Classifications
G; G03; G03B; G03B11/00; G02; G02B; G02B7/00; G02B7/006
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
227 words
A filter holder for photographic applications comprising: a main plate-like body portion (1) having an opening (2) therein; means (3,4) coupled to said body portion (1) and defining at least one channel (5-8) on one side of said body portion (1) and at least one channel (12,13) on the opposite side of said body portion (1); a threaded adapter (14) having a flange (15) for being removably received in said at least one channel on said opposite side of said body portion (1); said body portion (1) comprising means (17,18) for retaining said adapter in said at least one slot into which it is inserted, said adapter being rotatable within said slot when retained therein; a filter means (21) having a flange (23) and being shaped so as to conform to the shape of said opening (2) in said body portion (1); said body portion (1) having a recess (19) coextensive with and adjacent said opening (2) for receiving said flange (23) of said filter means when inserted therein, said adapter (14) having surface means overlying said recess (19) for retaining said filter means in said recess (19); resilient retaining means (9,10) coupled with said at least one channel (5-8) on said one side of said body portion (1) for retaining a filter or photographic effect sheet or plate inserted into said at least one channel (5-8).
Claim 2
Dependent Claim
227 words
A filter holder for photographic applications comprising: a main plate-like body portion (1) having an opening (2) therein; means (3,4) coupled to said body portion (1) and defining at least one channel (5-8) on one side of said body portion (1) and at least one channel (12,13) on the opposite side of said body portion (1); a threaded adapter (14) having a flange (15) for being removably received in said at least one channel on said opposite side of said body portion (1); said body portion (1) comprising means (17,18) for retaining said adapter in said at least one slot into which it is inserted, said adapter being rotatable within said slot when retained therein; a filter means (21) having a flange (23) and being shaped so as to conform to the shape of said opening (2) in said body portion (1); said body portion (1) having a recess (19) coextensive with and adjacent said opening (2) for receiving said flange (23) of said filter means when inserted therein, said adapter (14) having surface means overlying said recess (19) for retaining said filter means in said recess (19); resilient retaining means (9,10) coupled with said at least one channel (5-8) on said one side of said body portion (1) for retaining a filter or photographic effect sheet or plate inserted into said at least one channel (5-8).
Claim 3
Dependent Claim
18 words
The filter holder of claim 1 wherein said body portion comprises means (51,52) for engaging a lens shade.
Claim 4
Dependent Claim
36 words
The filter holder of claim 2 comprising a lens shade (50) which includes means (53,54,55,56) cooperable with said engaging means (51,52) of said body portion (1) for securing said lens shade (50) to said filter holder.
Claim 5
Dependent Claim
33 words
The filter holder of claim 3 wherein said lens shade further comprises channel means (61,62) at the forward end thereof for receiving at least one of filters and photographic effect sheets or plates.
Claim 6
Dependent Claim
67 words
The filter holder of claim 1 wherein said filter means having said flange thereon comprises a collar (21) fabricated of a substantially resilient material, said collar being generally ring-shaped and having a circular internal recess (22) therein for removably receiving a filter element (20) said filter element (20) being removable by resilient flexing of said collar (21) and pressing of said filter (20) out of said recess.
Claim 7
Dependent Claim
34 words
The filter holder of claim 1 or 5 wherein said filter means (21) is round and comprises means (25) thereon for engagement by a user for rotating said filter relative to said filter holder.
Claim 8
Dependent Claim
22 words
The filter holder of claim 6 wherein said means (25) for engagement by a user comprises projections on said filter means (21).
Claim 9
Dependent Claim
20 words
The filter holder of claim 1 or 5 wherein said filter means (21) and said opening (2) are both round.
Claim 10
Dependent Claim
34 words
The filter holder of claim 1 comprising two of said channels (5-8) on said one side of said body portion (1) and one channel (12,13) on said opposite side of said body portion (1).
References Cited (Backward Citations)
US2197184A
Cited
FR994298A
Cited
CH258866A
Cited
DE936790C
Cited
FR1203564A
Cited
US3940775A
Cited
EP0004246A2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-23 | 1985-05-25 | 1985-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-23 | 1989-05-25 | 1989-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-23 | 1993-05-25 | 1993-11-24 | $7700.00 | Window Closed / Lapsed |