US3147428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gyromagnetic resonance apparatus
Assignee: Varian Medical Systems Inc
•
Filing: 1958-10-16
•
Granted: 1964-09-01
•
Expires: 1978-10-16
Abstract
No abstract record available.
Inventors
- 👤 Weston A Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:57
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/38; G01R33/389; G01N; G01N24/00; G01N24/08; G01R33/44; G01R33/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
236 words
APPARATUS FOR ELIMINATING DRIFT OF THE OUTPUT SIGNAL FROM A GYROMAGNETIC SAMPLE LOCATED IN A POLARIZING MAGNETIC FIELD OF A GYROMAGNETIC RESONANCE SPECTROMETER SYSTEM COMPRISING A RADIO FREQUENCY TRANSMITTER MEANS FOR APPLYING A DRIVING RADIO FREQUENCY MAGNETIC FIELD TO THE SAMPLE SUBSTANTIALLY NORMAL TO THE DIRECTION OF THE POLARIZING MAGNETIC FIELD TO PRODUCE GYROMAGNETIC RESONANCE THEREIN, MEANS FOR MODULATING ONE OF SAID MAGNETIC FIELDS AT A LOW FREQUENCY RATE ADAPTED TO PRODUCE A CENTER BAND RADIO FREQUENCY RESONANCE SIGNAL AND A PLURALITY OF SIDE BAND RADIO FREQUENCY RESONANCE SIGNALS FROM THE SAMPLE WITHIN SAID FIELDS, EACH RESONANCE SIGNAL HAVING A LINE WIDTH IN THE RESONANCE SPECTRUM WHICH IS SEPARATED FROM THE OTHERS IN THE RESONANCE SPECTRUM, EACH RESONANCE SIGNAL INCLUDING SIGNAL FREQUENCY COMPONENTS AT THE DRIVING OR CENTER BAND FREQUENCY AND AT EACH SIDE BAND FREQUENCY, SWEEP GENERATOR MEANS FOR CHANGING ONE OF SAID MAGNETIC FIELDS TO THEREBY SWEEP THROUGH THE LINE WIDTH OF ONLY ONE OF SAID SEPARATE RESONANCE SIGNALS, RECEIVER MEANS INCLUDING MEANS FOR REJECTING ALL RADIO FREQUENCY COMPONENTS AND ALL MODULATING FREQUENCY COMPONENTS BUT A DESIRED ONE OF THE MODULATING FREQUENCY COMPONENTS OF SAID ONE RADIO FREQUENCY RESONANCE SIGNAL AND FOR MIXING SAID ONE DESIRED MODULATING FREQUENCY COMPONENT WITH A FREQUENCY COMPONENT DERIVED FROM SAID MODULATION FREQUENCY TO OBTAIN A SIGNAL OUTPUT PROPORTIONAL TO THE AMPLITUDE OF SAID MODULATION FREQUENCY COMPONENT OF SAID RESONANCE SIGNAL, AND MEANS FOR INDICATING SAID LAST SIGNAL OUTPUT.
Claim 2
Dependent Claim
236 words
APPARATUS FOR ELIMINATING DRIFT OF THE OUTPUT SIGNAL FROM A GYROMAGNETIC SAMPLE LOCATED IN A POLARIZING MAGNETIC FIELD OF A GYROMAGNETIC RESONANCE SPECTROMETER SYSTEM COMPRISING A RADIO FREQUENCY TRANSMITTER MEANS FOR APPLYING A DRIVING RADIO FREQUENCY MAGNETIC FIELD TO THE SAMPLE SUBSTANTIALLY NORMAL TO THE DIRECTION OF THE POLARIZING MAGNETIC FIELD TO PRODUCE GYROMAGNETIC RESONANCE THEREIN, MEANS FOR MODULATING ONE OF SAID MAGNETIC FIELDS AT A LOW FREQUENCY RATE ADAPTED TO PRODUCE A CENTER BAND RADIO FREQUENCY RESONANCE SIGNAL AND A PLURALITY OF SIDE BAND RADIO FREQUENCY RESONANCE SIGNALS FROM THE SAMPLE WITHIN SAID FIELDS, EACH RESONANCE SIGNAL HAVING A LINE WIDTH IN THE RESONANCE SPECTRUM WHICH IS SEPARATED FROM THE OTHERS IN THE RESONANCE SPECTRUM, EACH RESONANCE SIGNAL INCLUDING SIGNAL FREQUENCY COMPONENTS AT THE DRIVING OR CENTER BAND FREQUENCY AND AT EACH SIDE BAND FREQUENCY, SWEEP GENERATOR MEANS FOR CHANGING ONE OF SAID MAGNETIC FIELDS TO THEREBY SWEEP THROUGH THE LINE WIDTH OF ONLY ONE OF SAID SEPARATE RESONANCE SIGNALS, RECEIVER MEANS INCLUDING MEANS FOR REJECTING ALL RADIO FREQUENCY COMPONENTS AND ALL MODULATING FREQUENCY COMPONENTS BUT A DESIRED ONE OF THE MODULATING FREQUENCY COMPONENTS OF SAID ONE RADIO FREQUENCY RESONANCE SIGNAL AND FOR MIXING SAID ONE DESIRED MODULATING FREQUENCY COMPONENT WITH A FREQUENCY COMPONENT DERIVED FROM SAID MODULATION FREQUENCY TO OBTAIN A SIGNAL OUTPUT PROPORTIONAL TO THE AMPLITUDE OF SAID MODULATION FREQUENCY COMPONENT OF SAID RESONANCE SIGNAL, AND MEANS FOR INDICATING SAID LAST SIGNAL OUTPUT.
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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |