Smoke density measuring device including means to periodically block a light from a portion of the field of view
Abstract
Abstract A DEVICE FOR MEASURING THE DENSITY OF SMOKE SUITABLE FOR MEASURING THE DENSITY OF EITHER WHITE SMOKER OR BLACK SMOKE. THE DEVICE COMPRISES ONE OR MORE SHUTTERS, SUCH AS ROTATING DISCS, SO PLACED AS TO PARTIALLY PERIODICALLY INTERFERE WITH THE FIELD OF VISION OF A VIEWING TUBE THROUGH WHICH THE SMOKE UNDER EXAMINATION IS VIEWED. THE DENSITY OF THE SMOKE IS MEASURED BY COMPARING THE APPEARANCE OF THE SMOKE WITH THE APPEARANCE OF AMBIENT AIR THROUGH THE ROTATING SHUTTER IN THE FIELD OF VISION. THE DEVICE MAY BE USED FOR WHITE SMOKE AS WELL AS BLACK SMOKE DENSITY MEASUREMENT BY REFLECTING LIGHT OFF THE SHUTTER AS IT IS ROTATING. FOR MEASURING THE DENSITY OF EITHER WHITE SMOKER OR BLACK SMOKE. THE DEVICE COMPRISES ONE OR MORE SHUTTERS, SUCH AS ROTATING DISCS, SO PLACED AS TO PARTIALLY PERIODICALLY INTERFERE WITH THE FIELD OF VISION OF A VIEWING TUBE THROUGH WHICH THE SMOKE UNDER EXAMINATION IS VIEWED. THE DENSITY OF THE SMOKE IS MEASURED BY COMPARING THE APPEARANCE OF THE SMOKE WITH THE APPEARANCE OF AMBIENT AIR THROUGH THE ROTATING SHUTTER IN THE FIELD OF VISION. THE DEVICE MAY BE USED FOR WHITE SMOKE AS WELL AS BLACK SMOKE DENSITY MEASUREMENT BY REFLECTING LIGHT OFF THE SHUTTER AS IT IS ROTATING.
Inventors
- 👤 Harry Einstein
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |