US3135933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
M derived mechanical filter
Assignee: Collins Radio Co
•
Filing: 1962-07-26
•
Granted: 1964-06-02
•
Expires: 1982-07-26
Abstract
No abstract record available.
Inventors
- 👤 Robert A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:09
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/48; H03H9/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
MECHANICAL FILTER MEANS COMPRISING A PLURALITY OF FIRST AND SECOND DISKS HAVING SUBSTANTIALLY EQUAL RESONANT FREQUENCIES, SAID DISKS BEING SPACED APART AND HAVING THEIR AXES LIE ALONG A COMMON STRAIGHT LINE, FIRST COUPLING ROD MEANS RIGIDLY COUPLING TOGETHER ADJACENT ONES OF SAID DISKS, EACH OF SAID SECOND DISKS BEING SEGMENTED BY HAVING A PORTION OF ITS MASS REMOVED TO CAUSE ITS EQUIVALENT MASS TO BEAR A RATIO "M" TO THE EQUIVALENT MASS OF SAID FIRST DISKS FROM WHICH NO MASS HAS BEEN REMOVED, BRIDGING COUPLING ROD MEANS COUPLING TOGETHER THE DISKS ON EITHER SIDE OF EACH OF SAID SECOND DISKS FROM WHICH A PORTION OF ITS MASS HAS BEEN REMOVED, THE TOTAL CROSSSECTIONAL AREA OF THE BRIDGING COUPLING ROD MEANS BEARING A RATIO
Claim 2
Dependent Claim
123 words
MECHANICAL FILTER MEANS COMPRISING A PLURALITY OF FIRST AND SECOND DISKS HAVING SUBSTANTIALLY EQUAL RESONANT FREQUENCIES, SAID DISKS BEING SPACED APART AND HAVING THEIR AXES LIE ALONG A COMMON STRAIGHT LINE, FIRST COUPLING ROD MEANS RIGIDLY COUPLING TOGETHER ADJACENT ONES OF SAID DISKS, EACH OF SAID SECOND DISKS BEING SEGMENTED BY HAVING A PORTION OF ITS MASS REMOVED TO CAUSE ITS EQUIVALENT MASS TO BEAR A RATIO "M" TO THE EQUIVALENT MASS OF SAID FIRST DISKS FROM WHICH NO MASS HAS BEEN REMOVED, BRIDGING COUPLING ROD MEANS COUPLING TOGETHER THE DISKS ON EITHER SIDE OF EACH OF SAID SECOND DISKS FROM WHICH A PORTION OF ITS MASS HAS BEEN REMOVED, THE TOTAL CROSSSECTIONAL AREA OF THE BRIDGING COUPLING ROD MEANS BEARING A RATIO
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |