US3235781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Displacement sensitive or measuring devices
Assignee: Individual
•
Filing: 1963-04-09
•
Granted: 1966-02-15
•
Expires: 1983-04-09
Abstract
No abstract record available.
Inventors
- 👤 Spencer Rolf Edmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:29
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/12; G01D5/14; G01D5/20; G01D5/204; G01D5/2073; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/33; G05B19/35; G05B19/351
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
183 words
A DISPLACEMENT SENSITIVE OR MEASURING DEVICE COMPRISING A SCALE HAVING CYCLIC CONDUCTOR PORTIONS, AND A SLIDE HAVING A PLURALITY OF GROUPS OF CYCLIC CONDUCTOR PORTIONS IN REACTIVE COUPLING RELATIONSHIP WITH THE CYCLIC CONDUCTOR PORTIONS OF THE SCALE SAID GROUPS OF CYCLIC CONDUCTOR PORTIONS COMPRISING AT LEAST N SUCH GROUPS (WHERE N IS GREATER THAN THREE) PHASE DISPLACED ONE GROUP RELATIVE TO THE NEXT GROUP BY APPROXIMATELY 180* /N IN TERMS OF CYCLES OF THE CONDUCTOR PORTIONS OF THE SCALE, THE ARRANGEMENT OF THE GROUPS OF CONDUCTOR PORTIONS OF THE SLIDE BEING SUCH THAT WHEN AN ALTERNATING CURRENT OF SELECTED AMPLITUDE IS APPLIED TO A SELECTED ONE OF SAID N GROUPS AND ALTERNATING CURRENTS OF MUTUALLY EQUAL AMPLITUDES ARE APPLIED RESPECTIVELY TO THE OTHERS OF SAID N GROUPS, THE RESULTANT ALTERNATING SIGNAL IN THE CYCLIC CONDUCTOR PORTION OF THE SCALE HAS A MINIMUM AMPLITUDE WHEN THE SLIDE AND SCALE ARE RELATIVELY DISPLACED BY AN AMOUNT WHICH IS SUBSTANTIALLY LINEARLY RELATED TO SAID SELECTED AMPLITUDE WITHIN LIMITS OF + 180*/2N ABOUT AN ANGLE DETERMINED BY THE CURRENTS APPLIED TO THE OTHERS OF SAID N GROUPS
Claim 2
Dependent Claim
183 words
A DISPLACEMENT SENSITIVE OR MEASURING DEVICE COMPRISING A SCALE HAVING CYCLIC CONDUCTOR PORTIONS, AND A SLIDE HAVING A PLURALITY OF GROUPS OF CYCLIC CONDUCTOR PORTIONS IN REACTIVE COUPLING RELATIONSHIP WITH THE CYCLIC CONDUCTOR PORTIONS OF THE SCALE SAID GROUPS OF CYCLIC CONDUCTOR PORTIONS COMPRISING AT LEAST N SUCH GROUPS (WHERE N IS GREATER THAN THREE) PHASE DISPLACED ONE GROUP RELATIVE TO THE NEXT GROUP BY APPROXIMATELY 180* /N IN TERMS OF CYCLES OF THE CONDUCTOR PORTIONS OF THE SCALE, THE ARRANGEMENT OF THE GROUPS OF CONDUCTOR PORTIONS OF THE SLIDE BEING SUCH THAT WHEN AN ALTERNATING CURRENT OF SELECTED AMPLITUDE IS APPLIED TO A SELECTED ONE OF SAID N GROUPS AND ALTERNATING CURRENTS OF MUTUALLY EQUAL AMPLITUDES ARE APPLIED RESPECTIVELY TO THE OTHERS OF SAID N GROUPS, THE RESULTANT ALTERNATING SIGNAL IN THE CYCLIC CONDUCTOR PORTION OF THE SCALE HAS A MINIMUM AMPLITUDE WHEN THE SLIDE AND SCALE ARE RELATIVELY DISPLACED BY AN AMOUNT WHICH IS SUBSTANTIALLY LINEARLY RELATED TO SAID SELECTED AMPLITUDE WITHIN LIMITS OF + 180*/2N ABOUT AN ANGLE DETERMINED BY THE CURRENTS APPLIED TO THE OTHERS OF SAID N GROUPS
References 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) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |