Single lens reflex camera with interchangeable lens
Abstract
Abstract APPARATUS FOR MOUNTING INTERCHANGEABLE LENSES ON A SINGLE LENS REFLEX CAMERA WITH A BUILT IN EXPOSURE METER WHICH MEASURES THE LIGHT THAT HAS PASSED THROUGH THE PHOTO TAKING LENS. TWO SIGNAL MEMBERS CONNECTED TO THE LENS ARE ROTATABLE WITH THE DIAPHRAGM RING OF THE LENS. ONE OF THE SIGNAL MEMBERS COMMUNICATES DIRECTLY WITH THE F STOP READOUT MECHANISM OF THE CAMERA. THE OTHER SIGNAL MEMBER IS DISPLACED A PREDETERMINED DISTANCE FROM THE FIRST SIGNAL MEMBER TO ENGAGE THE EXPOSURE METER OF THE CAMERA AND THEREBY ACTUATE MECHANISMS WITHIN THE CAMERA TO COMPENSATE FOR THE OPTICAL CHARACTERISTICS OF EACH INTERCHANGEABLE LENS. THE F STOP INDICATING MECHANISM IN THE CAMERA AND THE MECHANISM TO COMPENSATE THE EXPOSURE METER WORK INDEPENDENTLY OF EACH OTHER.
Inventors
- 👤 Jun Shimomura
Bibliographic Details
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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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |