US3758198A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fitting device for the accessories of a camera
Assignee: Canon Inc
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Filing: 1972-04-04
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Granted: 1973-09-11
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Expires: 1992-04-04
Abstract
Abstract Fitting device for the accessories such as lens hood, etc. by means of a revolving bayonet mount system, comprising projections for fitting on the periphery of lens tube, the accessories having brims engageable with said projections and elastic pieces made of synthetic material, and at an engaged position of said projections with said brims, said elastic pieces are compressed between said projections of the lens tube and the accessories, thus the latter is held on the former by the resiliency of said elastic pieces.
Inventors
- 👤 S Kanie
- 👤 T Shoji
- 👤 I Nogi
- 👤 T Mitani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:55
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B17/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
188 words
A fitting device for use in detachably securing a tubular accessory having a securing end with an internal ring recessed in said securing end to a camera having a tubular camera portion with a plurality of circumferentially spaced mounting projections, comprising a joining ring adapted to be secured to the internal ring of the accessory and having a plurality of circumferentially spaced holding projections with the size of said tube being sufficient to receive the tubular camera portion with the spacing between the holding projections being sufficient to accommodate said mounting projections therebetween, said holding projections being spaced from the internal ring of the accessory tube when said joining ring is secured to said accessory tube, said joining ring having a plurality of circumferentially spaced inwardly extending resilient holding portions which engage against the mounting projections when the accessory tube with said joining ring are rotated after they are positioned over the tubular camera portion and the mounting projections are inserted between the holding projections and thereafter to position the holding projections behind the mounting projections and to compressively engage the holding projections with the resilient holding portions.
Claim 2
Dependent Claim
188 words
A fitting device for use in detachably securing a tubular accessory having a securing end with an internal ring recessed in said securing end to a camera having a tubular camera portion with a plurality of circumferentially spaced mounting projections, comprising a joining ring adapted to be secured to the internal ring of the accessory and having a plurality of circumferentially spaced holding projections with the size of said tube being sufficient to receive the tubular camera portion with the spacing between the holding projections being sufficient to accommodate said mounting projections therebetween, said holding projections being spaced from the internal ring of the accessory tube when said joining ring is secured to said accessory tube, said joining ring having a plurality of circumferentially spaced inwardly extending resilient holding portions which engage against the mounting projections when the accessory tube with said joining ring are rotated after they are positioned over the tubular camera portion and the mounting projections are inserted between the holding projections and thereafter to position the holding projections behind the mounting projections and to compressively engage the holding projections with the resilient holding portions.
Claim 3
Dependent Claim
51 words
A fitting device, according to claim 1, wherein said accesSory ring includes an inwardly extending stopper centrally disposed over each of said holding projections, said resilient holding portions being located on each side of said stopper which compressively engage with the mounting projections when they are positioned behind said holding projections.
Claim 4
Dependent Claim
37 words
A fitting device, according to claim 1, wherein said tubular accessory comprises a lens tube having said internal ring, said ring being spaced from said holding projections in an axial direction to accommodate said mounting projections therebetween.
Claim 5
Dependent Claim
32 words
A fitting device, according to claim 1, wherein said accessory ring includes holding projections in the form of two axially spaced projections forming a notch therebetween for receiving the mounting projections therein.
Claim 6
Dependent Claim
16 words
A fitting device, according to claim 1, wherein said resilient holding portions comprise a synthetic material.
Claim 7
Dependent Claim
24 words
A fitting device, according to claim 1, including means on said accessory ring for securing said ring to the ring of said tubular accessory.
Claim 8
Dependent Claim
18 words
A fitting device, according to claim 1, wherein said resilient holding portions comprise inwardly extending rounded resilient members.
Claim 9
Dependent Claim
198 words
An accessory fitting device of the bayonet mount type for use with, in combination, a camera and an accessory for the camera, the construction comprising a lens tube of the camera having a front portion joining with a plurality of joining projections and an accessory for the camera having a tubular fitting portion for said lens tube, a pair of opposed brim-like substantially similarly shaped projections mounted in said fitting portion in spaced relationship to each other so as to define a nip for receiving said joining projections therebetween, and which can be attached not only in the forward direction but in the inverse direction to the lens tube, said accessory being rotatable through a certain angle from the position at which it fits the lens tube to one in which the brim-like projections engage behind the joining projections, said fitting device being engageable in said tubular fitting portion and engaged against said lens tube and having a plurality of inwardly projecting holding pieces made of elastic material, compressed against the projections of said lens tube and the accessory in the interlocked position so that the accessory can be held on the lens tube by said holding pieces.
Claim 10
Dependent Claim
198 words
An accessory fitting device of the bayonet mount type for use with, in combination, a camera and an accessory for the camera, the construction comprising a lens tube of the camera having a front portion joining with a plurality of joining projections and an accessory for the camera having a tubular fitting portion for said lens tube, a pair of opposed brim-like substantially similarly shaped projections mounted in said fitting portion in spaced relationship to each other so as to define a nip for receiving said joining projections therebetween, and which can be attached not only in the forward direction but in the inverse direction to the lens tube, said accessory being rotatable through a certain angle from the position at which it fits the lens tube to one in which the brim-like projections engage behind the joining projections, said fitting device being engageable in said tubular fitting portion and engaged against said lens tube and having a plurality of inwardly projecting holding pieces made of elastic material, compressed against the projections of said lens tube and the accessory in the interlocked position so that the accessory can be held on the lens tube by said holding pieces.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |