Force indicating system
Abstract
Abstract ANALOG AND DIGITAL REPRESENTATIONS OF FORCES APPLIED TO A LOAD CELL ARE PRODUCED BY A SYSTEM THAT INCLUDES A COMPENSATED RESISTANCE BRIDGE. ANALOG REPRESENTATIONS OF THE APPLIED FORCE ARE PRODUCED ALMOST INSTANTANEOUSLY BY COUPLING AN INDICATOR DIRECTLY TO THE OUTPUT TERMINALS OF THE LOAD CELL. THIS REPRESENTATION IS INDEPENDENT OF THE DIGITAL REPRESENTATION WHICH MAY NOT BE AVAILABLE FOR SEVERAL SECONDS AFTER THE APPLICATION OF A FORCE OR A CHANGEING APPLIED FORCE. THE DIGITAL REPRESENTATION IS PRODUCED BY THE ACTION OF A SERVO LOOP AND A VARIABLE RESISTOR IN ONE ARM OF THE RESISTANCE BRIDGE. A COMPENSATING NETWORK CONNECTED ACROSS OPPOSED NODES OF THE RESISTANCE BRIDGE LINEARIZES THE DIGITAL READOUT TO PRODUCE A SINGLE SCALE READING FOR ALL VALUES OF FORCE APPLIED TO THE LOAD CELL.
Inventors
- 👤 Carl Martin
- 👤 William C Parker
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |