US3871752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Easily changeable filter holder
Assignee: HYGRO DYNAMICS IND Inc
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Filing: 1973-08-20
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Granted: 1975-03-18
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Expires: 1993-08-20
Abstract
Abstract A combination is disclosed which includes a housing for supporting a light source; support means removably secured to said housing for supporting a filter with respect to said housing, with said support means comprising a split ring-like member having first and second ends biased toward one another whereby said ring-like member frictionally engages said housing, and manually graspable release means for temporarily enlarging the aforenoted ring-like member whereby the ring-like member can be easily removed from such housing when it is desired to replace the filter supported thereby.
Inventors
- 👤 Max Habinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:14
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/006; F; F21; F21V; F21V17/00; F21V17/10; F21V17/16; F21V17/162; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44248
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
296 words
In combination: a housing for supporting a light source; support means removably secured to said housing for supporting a filter with respect to said housing, said support means comprising, a split ring member having first and second ends biased toward one another, whereby said split ring member frictionally engages said housing, said split ring member including an annular flange for supporting said filter, and said housing includes an outer extremity portion which urges said filter against said flange when said split ring member is frictionally engaged on said housing; manually grapsable release means for temporarily enlarging said split ring member, whereby said split ring member can be easily removed from said housing, said manually graspable release means comprising first and second L-shaped members secured to said split ring member, said first L-shaped member including a base portion having one segment thereof secured to said first end of said split ring member and a second segment thereof freely overlapping said second end of said split ring member and an outwardly directed leg portion extending from said second segment; said second L-shaped member including a base portion having one segment thereof secured to said second end of said split ring member and a second seggment thereof freely overlapping said first end of said split ring member and an outwardly directed leg portion extending from said second segment; whereby urging said outwardly directed leg portions toward one another will cause the separation of said first and second ends and enlargement of said split ring member; and further including expansible biasing means one end of which is secured to one of said outwardly directed leg portions and the other end of which is secured to said split ring member for normally urging said first and second ends toward one another.
Claim 2
Dependent Claim
296 words
In combination: a housing for supporting a light source; support means removably secured to said housing for supporting a filter with respect to said housing, said support means comprising, a split ring member having first and second ends biased toward one another, whereby said split ring member frictionally engages said housing, said split ring member including an annular flange for supporting said filter, and said housing includes an outer extremity portion which urges said filter against said flange when said split ring member is frictionally engaged on said housing; manually grapsable release means for temporarily enlarging said split ring member, whereby said split ring member can be easily removed from said housing, said manually graspable release means comprising first and second L-shaped members secured to said split ring member, said first L-shaped member including a base portion having one segment thereof secured to said first end of said split ring member and a second segment thereof freely overlapping said second end of said split ring member and an outwardly directed leg portion extending from said second segment; said second L-shaped member including a base portion having one segment thereof secured to said second end of said split ring member and a second seggment thereof freely overlapping said first end of said split ring member and an outwardly directed leg portion extending from said second segment; whereby urging said outwardly directed leg portions toward one another will cause the separation of said first and second ends and enlargement of said split ring member; and further including expansible biasing means one end of which is secured to one of said outwardly directed leg portions and the other end of which is secured to said split ring member for normally urging said first and second ends toward one another.
Claim 3
Dependent Claim
55 words
The combination of claim 1 wherein said split ring member includes a plurality of securing means for securing said other end of said expansible biasing means so that said expansible biasing means may be adjustably positioned with respect to said split ring member, whereby the force generated by said expansible biasing means may be varied.
Claim 4
Dependent Claim
49 words
The combination of claim 2 wherein said securing means of said split ring member comprises a plurality of apertures spaced thereabout, and said other end of said biasing means is received in a preselected one of said apertures in accordance with the biasing force desired for said biasing means.
Claim 5
Dependent Claim
257 words
In combination: a housing for supporting a light source; support means removably secured to said housing for supporting a filter with respect to said housing, said support means comprising, a split ring member having first and second ends biased toward one another, whereby said ring member frictionally engages said housing; manually graspable release means for temporarily enlarging said split ring member, whereby said split ring member can be easily removed from said housing, said manually graspable release means comprising first and second L-shaped members secured to said split ring member, said first L-shaped member including a base portion having one segment thereof secured to said first end of said split ring member and a second segment thereof freely overlapping said second end of said split ring member and an outwardly directed leg portion extending from said second segment; said second L-shaped member including a base portion having one segment thereof secured to said second end of said split ring member and a second segment thereof freely overlapping said first end of said split ring member and an outwardly directed leg portion extending from said second segment; whereby urging said outwardly directed leg portions toward one another will cause the separation of said first and second ends and enlargement of said split ring member; and further including expansible biasing means one end of which is secured to one of said outwardly directed leg portions and the other end of which is secured to said split ring member for normally urging said first and second ends toward one another.
Claim 6
Dependent Claim
257 words
In combination: a housing for supporting a light source; support means removably secured to said housing for supporting a filter with respect to said housing, said support means comprising, a split ring member having first and second ends biased toward one another, whereby said ring member frictionally engages said housing; manually graspable release means for temporarily enlarging said split ring member, whereby said split ring member can be easily removed from said housing, said manually graspable release means comprising first and second L-shaped members secured to said split ring member, said first L-shaped member including a base portion having one segment thereof secured to said first end of said split ring member and a second segment thereof freely overlapping said second end of said split ring member and an outwardly directed leg portion extending from said second segment; said second L-shaped member including a base portion having one segment thereof secured to said second end of said split ring member and a second segment thereof freely overlapping said first end of said split ring member and an outwardly directed leg portion extending from said second segment; whereby urging said outwardly directed leg portions toward one another will cause the separation of said first and second ends and enlargement of said split ring member; and further including expansible biasing means one end of which is secured to one of said outwardly directed leg portions and the other end of which is secured to said split ring member for normally urging said first and second ends toward one another.
Claim 7
Dependent Claim
32 words
The combination of claim 4 wherein said first and second ends of said split ring member are biased toward one another by the resiliency of the material comprising said split ring member.
Claim 8
Dependent Claim
55 words
The combination of claim 4 wherein said split ring member includes a plurality of securing means for securing said other end of said expansible biasing means so that said expansible biasing means may be adjustably positioned with respect to said split ring member, whereby the force generated by said expansible biasing means may be varied.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |