US3153111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measurement of displacements
Assignee: National Research Development Corp UK
•
Filing: 1959-06-26
•
Granted: 1964-10-13
•
Expires: 1979-06-26
Abstract
No abstract record available.
Inventors
- 👤 Barber Derek Leslie Arthur
- 👤 Atkinson Maurice Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:00
CPC Classifications
G; G01; G01D; G01D5/00; G01D5/26; G01D5/32; G01D5/34; G01D5/36; G01D5/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
APPARATUS FOR MEASURING THE DISPLACEMENT OF A MOVING PART ALONG A PRE-DETERMINED PATH COMPRISING A MEASUREMENT MEMBER MOVING WITH THE MOVING PART, A COMPARISON MEMBER IN CONSTANT MOVEMENT JUXTAPOSED TO THE MEASUREMENT MEMBER, AT LEAST ONE OF SAID MEMBERS CARRYING A FLUCTUATING PATTERN, THE FLUCTUATIONS OF WHICH ARE DISTRIBUTED AT CONSTANT PITCH IN THE DIRECTION OF MOVEMENT OF THE MOVING MEMBER, MEANS RESPONDING TO THE FLUCTUATING PATTERN FOR DERIVING AN ALTERNATING CURRENT MEASUREMENT SIGNAL FROM THE RELATIVE MOVEMENT OF THE MEASUREMENT MEMBER AND COMPARISON MEMBER, MEANS FOR DERIVING AN ALTERNATING CURRENT REFERENCE SIGNAL HAVING A DETERMINED CONSTANT RELATIONSHIP TO THE MOVEMENT OF THE
Claim 2
Dependent Claim
103 words
APPARATUS FOR MEASURING THE DISPLACEMENT OF A MOVING PART ALONG A PRE-DETERMINED PATH COMPRISING A MEASUREMENT MEMBER MOVING WITH THE MOVING PART, A COMPARISON MEMBER IN CONSTANT MOVEMENT JUXTAPOSED TO THE MEASUREMENT MEMBER, AT LEAST ONE OF SAID MEMBERS CARRYING A FLUCTUATING PATTERN, THE FLUCTUATIONS OF WHICH ARE DISTRIBUTED AT CONSTANT PITCH IN THE DIRECTION OF MOVEMENT OF THE MOVING MEMBER, MEANS RESPONDING TO THE FLUCTUATING PATTERN FOR DERIVING AN ALTERNATING CURRENT MEASUREMENT SIGNAL FROM THE RELATIVE MOVEMENT OF THE MEASUREMENT MEMBER AND COMPARISON MEMBER, MEANS FOR DERIVING AN ALTERNATING CURRENT REFERENCE SIGNAL HAVING A DETERMINED CONSTANT RELATIONSHIP TO THE MOVEMENT OF THE
References Cited (Backward Citations)
US2628539A
Cited
US2557219A
Cited
US2685082A
Cited
US2882475A
Cited
US2886717A
Cited
GB773494A
Cited
GB791902A
Cited
US2832259A
Cited
US2965762A
Cited
US2948890A
Cited
US3001081A
Cited
US3076374A
Cited
US2993279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-13 | 1968-04-13 | 1968-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-13 | 1972-04-13 | 1972-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-13 | 1976-04-13 | 1976-10-13 | $7700.00 | Window Closed / Lapsed |