Slope indicating device
Abstract
Abstract A SLOPE INDICATING DEVICE IN THE FORM OF A CARPENTER''S LEVEL HAVING A METAL SPHERE OPERATIVELY DISPOSED IN AN ANNULAR CHAMBER FORMED IN A CYLINDRICAL SHAPED BARREL DISPOSED IN THE LEVEL. PREPOSITIONED CONTACTS ARE DISPOSED ON THE INNER WALL OF THE ANNULAR CHAMBER SUCH THAT THE SPHER CONTACTS CERTAIN OF SAID CONTACTS TO CLOSE AN ELECTRICAL CIRCUIT AND ACTUATE AN ELECTRICAL SIGNAL DEVICE WHEN THE LEVEL IS DISPOSED TO PRESELECTED ANGLES. THE BARREL IS ANGULAR ADJUSTABLE AND CONTAINS INDICATING MEANS ON ITS OUTER SURFACE IN COACTION WITH A DEGREE ANGLE SCALE ON THE ADJACENT SURFACE OF THE LEVEL TO ENABLE AN OPERATOR TO ANGULAR POSITION THE BARREL (THE CHAMBER) AT A PRESELECTED ANGLE AFTER WHICH THE LEVEL ITSELF MAY BE POSITIONED AT SUCH ANGLE AS WILL BE INDICATED BY ACTUATION OF THE ELECTRIC SIGNAL DEVICE.
Inventors
- 👤 Walter Sturm
Bibliographic Details
Claims Analysis
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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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |