US3916152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature control system for a centrifugal-type chemistry analyzer
Assignee: Adaltis US Inc
•
Filing: 1974-11-13
•
Granted: 1975-10-28
•
Expires: 1994-11-13
Abstract
Abstract A temperature control system for raising and controlling the temperature of small volumes of liquid by heating the liquid and detecting the instantaneous temperature and rate of temperature increase and utilizing this information to control the heating of the liquid so that the desired liquid temperature is attained and maintained in a minimum time interval.
Inventors
- 👤 Clyde D Hinman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:39
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; B; B01; B01L; B01L7/00; G05D23/1906; G05D23/1909
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
168 words
A system for controlling the temperature of a reaction chamber adapted to containing liquid comprising, in combination, heating means adapted to develop heat by the passage of electrical current therethrough, means for transferring heat developed in the heating means to the reaction chamber to raise the temperature thereof to a desired value, temperature sensing means adapted to provide an electrical signal proportional to the amount by which the reaction chamber temperature is below the desired value, control means responsive to the signal of the temperature sensing means adapted to supply electrical energy to the heating element, rate detecting means for obtaining an electrical signal proportional to the rate of temperature increase of the reaction chamber and for applying such electrical signal to the control means to inactivate the control means when the rate of temperature increase is above a predetermined value, means for preventing the signal from the rate detecting means from inactivating the control means as long as the reaction chamber temperature is below a pre-determined value.
Claim 2
Independent Claim
168 words
A system for controlling the temperature of a reaction chamber adapted to containing liquid comprising, in combination, heating means adapted to develop heat by the passage of electrical current therethrough, means for transferring heat developed in the heating means to the reaction chamber to raise the temperature thereof to a desired value, temperature sensing means adapted to provide an electrical signal proportional to the amount by which the reaction chamber temperature is below the desired value, control means responsive to the signal of the temperature sensing means adapted to supply electrical energy to the heating element, rate detecting means for obtaining an electrical signal proportional to the rate of temperature increase of the reaction chamber and for applying such electrical signal to the control means to inactivate the control means when the rate of temperature increase is above a predetermined value, means for preventing the signal from the rate detecting means from inactivating the control means as long as the reaction chamber temperature is below a pre-determined value.
Claim 3
Dependent Claim
53 words
A system in accordance with claim 1 wherein the reaction chamber is substAntially separated from ambient temperatures by an enclosing housing member and means are provided to pass air in contact with the heating means and then into the housing member to transfer heat developed in the heating means to the reaction chamber.
Claim 4
Dependent Claim
54 words
A system in accordance with claim 1 wherein means are provided for supporting the reaction chamber, said means being in heat transfer relationship with the reaction chamber and having a substantially higher thermal mass than any liquid contained in the reaction chamber and being adapted to be heated to the desired reaction chamber temperature.
References Cited (Backward Citations)
US2768546A
Cited
US2742190A
Cited
US3246688A
Cited
US3322338A
Cited
US3566070A
Cited
US3529358A
Cited
US3863049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |