US4618267A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote temperature-set-point controller
Assignee: United States, ENERGY THE, Department of
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Filing: 1984-10-17
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Granted: 1986-10-21
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Expires: 2004-10-17
Abstract
Abstract An instrument for carrying out mechanical strain tests on metallic samples with the addition of an electrical system for varying the temperature with strain, the instrument including opposing arms and associated equipment for holding a sample and varying the mechanical strain on the sample through a plurality of cycles of increasing and decreasing strain within predetermined limits, circuitry for producing an output signal representative of the strain during the tests, apparatus including a set point and a coil about the sample for providing a controlled temperature in the sample, and circuitry interconnected between the strain output signal and set point for varying the temperature of the sample linearly with strain during the tests.
Inventors
- 👤 William F. Burke
- 👤 Alan L. Winiecki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:41
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/08; G01N3/18
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
110 words
A temperature control system for an instrument for providing mechanical strain data in a fully reversed cycle test on a metallic sample with the strain results being minimum and maximum values, the system comprising temperature means coupled to said sample for varying the temperature of the sample during the test including a set point means in a controlled device corresponding to a controlled temperature, means coupled to said sample for determining the value of strain during the test and providing an output signal representative of strain, and circuit means interconnected between the strain output and set point means for changing the set point linearly with changing values of strain output.
Claim 2
Dependent Claim
110 words
A temperature control system for an instrument for providing mechanical strain data in a fully reversed cycle test on a metallic sample with the strain results being minimum and maximum values, the system comprising temperature means coupled to said sample for varying the temperature of the sample during the test including a set point means in a controlled device corresponding to a controlled temperature, means coupled to said sample for determining the value of strain during the test and providing an output signal representative of strain, and circuit means interconnected between the strain output and set point means for changing the set point linearly with changing values of strain output.
Claim 3
Dependent Claim
18 words
The system of claim 1 wherein the circuit means includes analog means for changing the temperature set point.
Claim 4
Dependent Claim
32 words
The system of claim 2 wherein the circuit means includes analog means for changing the temperature set point per unit change in strain as the strain is increased to a maximum value.
Claim 5
Dependent Claim
24 words
The system of claim 3 wherein the circuit means includes analog means for reversing the temperature set point change per unit change in strain.
Claim 6
Dependent Claim
41 words
The temperature control system of claim 3 wherein the analog means includes means for varying the temperature based on the equation T=K.sub.1 ±K.sub.2 S where T is temperature, K 1 and K 2 are constants, and S represents said output signal.
Claim 7
Dependent Claim
113 words
An instrument comprising sample means for holding a metallic sample and varying the mechanical strain on the sample through a plurality of cycles in which the strain is increased and decreased between limits, means interconnected with the sample means and coupled to said sample for producing an output signal representative of the strain during the cycling tests, temperature means coupled to said sample for varying the temperature of the sample during the test including a set point means in a controlled device corresponding to a controlled temperature, and circuit means interconnected between the strain output signal and set point for changing the set point linearly with changing values of the strain output signal.
Claim 8
Dependent Claim
113 words
An instrument comprising sample means for holding a metallic sample and varying the mechanical strain on the sample through a plurality of cycles in which the strain is increased and decreased between limits, means interconnected with the sample means and coupled to said sample for producing an output signal representative of the strain during the cycling tests, temperature means coupled to said sample for varying the temperature of the sample during the test including a set point means in a controlled device corresponding to a controlled temperature, and circuit means interconnected between the strain output signal and set point for changing the set point linearly with changing values of the strain output signal.
Claim 9
Dependent Claim
18 words
The instrument of claim 6 wherein the circuit means includes analog means for changing the temperature set point.
Claim 10
Dependent Claim
36 words
The instrument of claim 7 wherein the circuit means includes analog means for changing the temperature set point per unit change in strain as the strain is increased to a maximum and decreased to a minimum.
Claim 11
Dependent Claim
24 words
The instrument of claim 8 wherein the circuit means includes analog means for reversing the temperature set point change per unit change in strain.
Claim 12
Dependent Claim
41 words
The instrument of claim 8 wherein the analog means includes means for varying the temperature based on the equation T=K.sub.1 ±K.sub.2 S where T is temperature, K 1 and K 2 are constants, and S represents a variable based on strain.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |