Patent US4457608A successfully refreshed from Google Patents.
US4457608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interchangeable lens with electrical contacts for transmitting data to a camera
Assignee: Pentax Corp
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Filing: 1982-05-06
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Granted: 1984-07-03
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Expires: 2002-05-06
Abstract
Abstract An interchangeable lens is provided with a plurality of contacts arranged in recesses and engaged with one side of a lever actuated when the lens is mounted to a camera. Upon mounting, the contacts protrude beyond the end of the lens into recesses in the camera body to make contact with a further set of electrical contacts arranged therein.
Inventors
- 👤 Shinzuke Komoto
- 👤 Yasuyuki Haneishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:37
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B17/12; G03B17/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
168 words
An assembly for mounting an interchangeable lens to a camera body comprising: a lens mount; a camera body mount; a plurality of electrical contacts normally received within recesses provided in said lens mount; a plurality of electrical contacts received within recesses provided in said camera body mount; means for protruding said contacts from said lens mount when said lens is mounted to said camera body, said protruding means further comprising a lever means in said lens, one end of said lever means being engaged with ends of said lens contacts and the other end of said lever means having a protrusion; a plate disposed between said lens contacts and said lever means; and a plurality of springs biasing said lens contacts away from said camera body; said lens mount including a lock groove into which said protrusion protrudes, said camera mount including a pin engageable with said protrusion, whereby said lever is pivoted to urge said lens contacts out of said recesses to engage said camera body contacts.
Claim 2
Dependent Claim
168 words
An assembly for mounting an interchangeable lens to a camera body comprising: a lens mount; a camera body mount; a plurality of electrical contacts normally received within recesses provided in said lens mount; a plurality of electrical contacts received within recesses provided in said camera body mount; means for protruding said contacts from said lens mount when said lens is mounted to said camera body, said protruding means further comprising a lever means in said lens, one end of said lever means being engaged with ends of said lens contacts and the other end of said lever means having a protrusion; a plate disposed between said lens contacts and said lever means; and a plurality of springs biasing said lens contacts away from said camera body; said lens mount including a lock groove into which said protrusion protrudes, said camera mount including a pin engageable with said protrusion, whereby said lever is pivoted to urge said lens contacts out of said recesses to engage said camera body contacts.
Claim 3
Dependent Claim
31 words
An assembly as claimed in claim 1, wherein said camera body contacts are connected to lead wires, and are selectively electrically connected to one another by means of said lens contacts.
References Cited (Backward Citations)
US4357089A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |