Cinematographic apparatus with built-in exposure meter
Abstract
Abstract THE SHUTTER (8) OF A MOTION PICTURE CAMERA HAS A FLAT LIGHT REFLECTING AND DIFFUSING FRONT SURFACE (8A) WHICH DIRECTS DIFFUSED SCENE LIGHT AGAINST ONE OR BOTH PARALLELCONNECTED PHOTOELECTRIC RESISTORS (11, 12) IN THE CIRCUIT OF AN EXPOSURE METER (5, 11, 12, 14) WHICH IS BUILT INTO THE CAMERA AND SERVES TO ADJUST THE DIAPHRAGM (6). THE FRONT SURFACE IS PROVIDED WITH A FLAT PLATE-LIKE LINER (10) OF TRANSPARENT LIGHTWEIGHT SYNTHETIC PLASTIC MATERIAL. WHEN THE SHUTTER ADMITS SCENE LIGHT TO AN UNEXPOSED FILM FRAME (7), ITS FRONT SURFACE IS MOVED AWAY FROM THE PATH (AB-C) OF INCOMING SCENE LIGHT. WHEN THE SHUTTER IS AT A STANDSTILL, ITS FRONT SURFACE DIRECTS LIGHT AGAINST A SINGLE PHOTOELECTRIC RESISTOR (11).
Inventors
- 👤 Helmut Mayr
- 👤 Theodor Huber
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |