Method and apparatus for determining deflection of a structure
Abstract
Abstract A PAIR OF COUNTER - ROTATING MASSES ARE ROTATED SYNCHRONOUSLY IN A VERTICAL PLANE, THE MASSES BEING ARRANGED WITH RESPECT TO A MECHANICAL COUPLING MEANS WHICH MAY BE FORMED OF A SINGLE WHEEL TRAILER SO AS TO PRODUCE A CYCLIC VARIATION OF THE DOWNWARD FORCE EXERTED BY THE WHEEL OF THE TRAILER ON THE SURFACE OF THE STRUCTURE BEING TESTED. THE TRAILER IS DESIGNED WITH RESPECT TO THE FORCE GENERATED BY THE ROTATABLE MASSES SUCH THAT THERE WILL ALWAYS BE A DOWNWARD FORCE ACTING AGAINST THE SURFACE, AVOIDING ANY NEGATIVE FORCE DURING THE ENTIRE CYCLE OF THE ROTATING MASSES. MOTION SENSING DEVICES ARE PROVIDED TO DETERMINE THE AMPLITUDE OF THE VERTICAL OSCILLATORY MOTION AND/OR THE PHASE ANGLE OF THE MOTION WITH RESPECT TO THE DRIVING FORCE OF THE ROTATING MASSES.
Inventors
No inventors recorded.
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |