US3717029A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torquemeter
Assignee: S Himmelstein & Co
•
Filing: 1968-10-23
•
Granted: 1973-02-20
•
Expires: 1988-10-23
Abstract
Abstract A torquemeter for use in measuring torque in a rotary drive including a rotary transformer having a rotor portion on a carrier formed of material having high electrical conductivity and low magnetic characteristics for effectively precluding cross talk or flux leakage paths through the shaft and effectively precluding spurious signals being generated in the torquemeter control as from shaft magnetostriction effects and the like. The torquemeter further includes a control comprising a standard strain gage carrier system. The rotary transformer comprises a high performance wide band transformer. The control avoids the use of resonant circuits and includes means for electrical balancing thereof on the stationary side of the rotary transformer.
Inventors
- 👤 R Tveter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:13
CPC Classifications
G; G01; G01L; G01L3/00; G01L3/02; G01L3/04; G01L3/10; G01L3/108; Y; Y10; Y10T; Y10T74/00; Y10T74/15; Y10T74/1526; Y10T74/1542; Y10T74/1544
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
A torquemeter for measuring torque in a rotary drive, comprising: carrier means formed of material having high electrical conductivity and low magnetic characteristics; means for mounting said carrier means for rotation with a rotary drive; transformer means having a rotor portion comprising a pair of coils spaced axially on said carrier means and a stator portion fixed adjacent said rotor portion in electrical coupled relationship to said rotor portion, said carrier extending axially between said coils; means responsive to a torque in the rotary drive for providing a corresponding electrical control effect on the rotor portion of said transformer; and means electrically connected to the stator portion of said transformer for providing a drive torque indication corresponding to said control effect on the rotor.
Claim 2
Dependent Claim
124 words
A torquemeter for measuring torque in a rotary drive, comprising: carrier means formed of material having high electrical conductivity and low magnetic characteristics; means for mounting said carrier means for rotation with a rotary drive; transformer means having a rotor portion comprising a pair of coils spaced axially on said carrier means and a stator portion fixed adjacent said rotor portion in electrical coupled relationship to said rotor portion, said carrier extending axially between said coils; means responsive to a torque in the rotary drive for providing a corresponding electrical control effect on the rotor portion of said transformer; and means electrically connected to the stator portion of said transformer for providing a drive torque indication corresponding to said control effect on the rotor.
Claim 3
Dependent Claim
124 words
A torquemeter for measuring torque in a rotary drive, comprising: carrier means formed of material having high electrical conductivity and low magnetic characteristics; means for mounting said carrier means for rotation with a rotary drive; transformer means having a rotor portion comprising a pair of coils spaced axially on said carrier means and a stator portion fixed adjacent said rotor portion in electrical coupled relationship to said rotor portion, said carrier extending axially between said coils; means responsive to a torque in the rotary drive for providing a corresponding electrical control effect on the rotor portion of said transformer; and means electrically connected to the stator portion of said transformer for providing a drive torque indication corresponding to said control effect on the rotor.
Claim 4
Dependent Claim
124 words
A torquemeter for measuring torque in a rotary drive, comprising: carrier means formed of material having high electrical conductivity and low magnetic characteristics; means for mounting said carrier means for rotation with a rotary drive; transformer means having a rotor portion comprising a pair of coils spaced axially on said carrier means and a stator portion fixed adjacent said rotor portion in electrical coupled relationship to said rotor portion, said carrier extending axially between said coils; means responsive to a torque in the rotary drive for providing a corresponding electrical control effect on the rotor portion of said transformer; and means electrically connected to the stator portion of said transformer for providing a drive torque indication corresponding to said control effect on the rotor.
Claim 5
Dependent Claim
39 words
The torquemeter of claim 1 wherein said stator portion of the transformer includes an input section and an output section spaced from said input section, said carrier means effectively precluding cross talk between said sections through said rotary drive.
Claim 6
Dependent Claim
26 words
The torquemeter of claim 1 wherein said carrier means is arranged to be substantially free of torsional stresses at said transformer to preclude spurious torque indications.
Claim 7
Dependent Claim
34 words
The torquemeter of claim 3 wherein said carrier means includes a portion cantilevered from said mounting means, said transformer rotor portion being carried on said cantilevered portion to be free of said torsional stresses.
Claim 8
Dependent Claim
17 words
The torquemeter of claim 1 wherein said carrier comprises a tubular element extending about said rotary drive.
Claim 9
Dependent Claim
23 words
The torquemeter of claim 5 wherein said mounting means comprises means securing one end of said tubular element fixedly to said rotary drive.
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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |