US3774994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lens and sight adjustor for camera view finder
Assignee: Pentax Corp
•
Filing: 1972-07-06
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Granted: 1973-11-27
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Expires: 1992-07-06
Abstract
Abstract A lens for a sight adjustor on a camera view finder has a resilient portion which compresses when a projection on the lens periphery is inserted into a hollow in the camera view finder''s housing. The compression is accomplished by means of a manipulative portion on the lens which projects through a cut-out portion of the view finder housing for manipulation by the user''s fingers. The inner portion of the view finder housing is stepped to form a larger and a smaller opening therein. In this manner, when the lens projection is inserted into the hollow and the lens compressed by force of the user''s fingers on the manipulative portion of the lens, the lens is adapted to slide into the housing''s larger opening to rest against the stepped portion. The housing also includes engaging grooves for engaging a peripheral portion of the lens when it is in position against the stepped portion of the housing to prevent the lens from inadvertently sliding out of contact with the stepped portion.
Inventors
- 👤 F Urano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:42
CPC Classifications
G; G03; G03B; G03B13/00; G03B13/02; G03B13/10; G03B13/12
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
132 words
A lens adapted for use in the housing of a sight adjustor for a camera view finder of the type having a viewing aperture and a retaining means for holding a viewing portion of said lens in alignment with said viewing aperture, said lens comprising: said viewing portion; a resilient portion; and a manipulation portion; said manipulation portion being adapted for manipulation by the fingers of a user to urge said lens against said housing so that said resilient portion compresses to permit said lens to slide into engagement with said retaining means; and said resilient portion being adapted to expand upon release of said manipulative portion by said user''s fingers so that said viewing portion is aligned with said viewing aperture and said manipulative portion is engaged by said retaining means.
Claim 2
Dependent Claim
132 words
A lens adapted for use in the housing of a sight adjustor for a camera view finder of the type having a viewing aperture and a retaining means for holding a viewing portion of said lens in alignment with said viewing aperture, said lens comprising: said viewing portion; a resilient portion; and a manipulation portion; said manipulation portion being adapted for manipulation by the fingers of a user to urge said lens against said housing so that said resilient portion compresses to permit said lens to slide into engagement with said retaining means; and said resilient portion being adapted to expand upon release of said manipulative portion by said user''s fingers so that said viewing portion is aligned with said viewing aperture and said manipulative portion is engaged by said retaining means.
Claim 3
Dependent Claim
26 words
The lens of claim 1 including a projection on the periphery of said lens, said projection adapted to engage with a corresponding recess on said housing.
Claim 4
Dependent Claim
29 words
The lens of claim 1 wherein said resilient portion projects outwardly at the periphery of said lens and is adapted to engage with a corresponding recess in said housing.
Claim 5
Dependent Claim
76 words
The lens of claim 1 in combination with a sight adjustor housing having a retaining means including: a stepped portion along the axis of said viewing aperture so that said sight adjustor has a first opening and a smaller second opening; and engaging means in said first opening for engaging a portion of the periphery of said lens to hold said lens adjacent said stepped portion when said resilient portion is returned to said expanded position.
Claim 6
Dependent Claim
40 words
The apparatus of claim 4 wherein said first opening includes a hollow in the portion of said first opening adjacent the periphery of said lens; and said lens includes a projection on the periphery thereof for engagement with said hollow.
Claim 7
Dependent Claim
39 words
The lens of claim 4 including a hollow in the Portion of said first opening adjacent the periphery of said lens and wherein said resilient portion projects outwardly at the periphery of said lens for engagement with said hollow.
Claim 8
Dependent Claim
30 words
The apparatus of claim 4 wherein the manipulative portion extends outwardly from the periphery of said lens and said first opening includes a cut-out section for receiving said manipulative portion.
Claim 9
Dependent Claim
36 words
The apparatus of claim 7 wherein said engaging means includes a groove adjacent said cut-out portion, said groove adapted to engage the periphery of said lens when the resilient portion is returned to said expanded position.
Claim 10
Dependent Claim
40 words
The apparatus of claim 8 wherein said first opening includes a hollow in the portion of said first opening adjacent the periphery of said lens; and said lens includes a projection on the periphery thereof for engagement with said hollow.
Claim 11
Dependent Claim
39 words
The lens of claim 8 including a hollow in the portion of said first opening adjacent the periphery of said lens and wherein said resilient portion projects outwardly at the periphery of said lens for engagement with said hollow.
Claim 12
Dependent Claim
22 words
The apparatus of claim 4 wherein the side walls of said smaller opening slope inwardly toward the axis of said viewing aperture.
Claim 13
Dependent Claim
21 words
The apparatus of claim 4 wherein said sight adjustor housing includes grooves along the outer sides thereof to accommodate accessory attachments.
Claim 14
Dependent Claim
20 words
The lens of claim 1 wherein said manipulative portion includes indicia thereon for indicating an optical value for said lens.
Claim 15
Dependent Claim
55 words
The lens of claim 1 wherein said resilient portion includes a channel-shaped member adapted to fit over the periphery of said viewing portion, said channel shaped member having a portion therein cut out and bent to form a spring, whereby said lens is adapted to have the viewing parts thereof constructed of conventional glass material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |