US3628436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shock-preventing device for a mirror-moving mechanism of a single lens reflex camera
Assignee: Nikon Corp
•
Filing: 1969-05-14
•
Granted: 1971-12-21
•
Expires: 1989-05-14
Abstract
Abstract A resilient member is interposed between the mirror of a single lens reflex camera and the shutter actuated quick-return mechanism for the mirror when the quick-return mechanism is manually overridden to detain the mirror in the exposure position. The resilient member prevents the quick-return mechanism for striking the mirror when the shutter is released.
Inventors
- 👤 Akihiko Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:54
CPC Classifications
G; G03; G03B; G03B19/00; G03B19/02; G03B19/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
186 words
A shock-preventing device for a single-lens reflex camera having a mirror quick return and a manual mirror mode of operation comprising, in combination, mirror means movable between the viewing position and the exposure position; a first lever adapted to engage with said mirror means and actuated by the shutter release button to move between an initial position in which said mirror means is arrested at its viewing position and a second position in which said mirror means is positioned at its exposure position, said first lever having a first protrusion extending therefrom; a second lever used in the manual mirror mode of operation adapted to engage with said mirror means for optionally positioning said mirror means and retaining the latter at the exposure position prior to release of the shutter button; and a second protrusion positioned with relation to the second lever so that upon engagement of the second lever with the mirror means the second protrusion will be positioned in the path of movement of the first protrusion to contact the first protrusion and to prevent engagement of the first lever and the mirror means.
Claim 2
Dependent Claim
186 words
A shock-preventing device for a single-lens reflex camera having a mirror quick return and a manual mirror mode of operation comprising, in combination, mirror means movable between the viewing position and the exposure position; a first lever adapted to engage with said mirror means and actuated by the shutter release button to move between an initial position in which said mirror means is arrested at its viewing position and a second position in which said mirror means is positioned at its exposure position, said first lever having a first protrusion extending therefrom; a second lever used in the manual mirror mode of operation adapted to engage with said mirror means for optionally positioning said mirror means and retaining the latter at the exposure position prior to release of the shutter button; and a second protrusion positioned with relation to the second lever so that upon engagement of the second lever with the mirror means the second protrusion will be positioned in the path of movement of the first protrusion to contact the first protrusion and to prevent engagement of the first lever and the mirror means.
Claim 3
Dependent Claim
36 words
A shock-preventing device according to claim 1 wherein the second protrusion is positioned on a third lever pivotally engaged with the second lever, and at least one of the protrusions is made from an elastic material.
Claim 4
Dependent Claim
43 words
A shock-preventing device according to claim 2 wherein said mirror means includes a projection moved with the mirror, said first and second levers are coaxially pivoted on the camera body, each of said first and second levers being engageable with said mirror projection.
Claim 5
Dependent Claim
61 words
A shock-preventing device according to claim 3 wherein said first lever further has an arm for releasing the shutter, said first lever protrusion being provided on said arm, so that after depressing the shuttEr button, the first lever protrusion contacts with the second protrusion which has been positioned by said second lever in the path of movement of said first protrusion.
References Cited (Backward Citations)
US3474715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |