US3876880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyranometer for the measurement of solar radiation
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
•
Filing: 1974-03-13
•
Granted: 1975-04-08
•
Expires: 1994-03-13
Abstract
Abstract The pyranometer for the measurement of total solar radiation is of the filtering hemisphere type incorporating a thermoelectric detector and comprises at least three measuring heads of the thermoelectric detector type each having a number of stationary hemispherical filters including at least one selective filter which are superposed in concentric relation and through which the radiation to be measured passes continuously, circulation systems for internal ventilation between the filters of each measuring head in order to remove the heat produced by absorption of radiation by the filters, a heat removal system which is common to the internal ventilation systems, an external system for continuous ventilation of the measuring heads.
Inventors
- 👤 Roger Guicherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:31
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10; G01J5/02; G01J5/05; G01J5/051; G01J5/06; G01J5/061; G01J5/08; G01J5/0875; G01J1/00; G01J1/42; G01J2001/4266; G01J2001/4285
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
113 words
A pyranometer for the measurement of total solar radiation of the filtering hemisphere type incorporating a thermoelectric detector, wherein said pyranometer comprises : at least three measuring heads of the thermoelectric detector type and each comprising a number of stationary hemispherical filters including at least one selective filter which are superposed in a concentric manner and through which the radiation to be measured passes continuously, circulation systems for internal ventilation between the filters of each head for the purpose of removing the heat produced by absorption of radiation by said filters, a heat removal system which is common to the internal ventilation systems, an external system for continuous ventilation of the measuring heads.
Claim 2
Dependent Claim
113 words
A pyranometer for the measurement of total solar radiation of the filtering hemisphere type incorporating a thermoelectric detector, wherein said pyranometer comprises : at least three measuring heads of the thermoelectric detector type and each comprising a number of stationary hemispherical filters including at least one selective filter which are superposed in a concentric manner and through which the radiation to be measured passes continuously, circulation systems for internal ventilation between the filters of each head for the purpose of removing the heat produced by absorption of radiation by said filters, a heat removal system which is common to the internal ventilation systems, an external system for continuous ventilation of the measuring heads.
Claim 3
Dependent Claim
54 words
A pyranometer according to claim 1, wherein one external hemispherical filter of each measuring head is a selective filter assigned to a portion of the total radiation, namely within the respective ranges of ultraviolet radiation (0.2 to 0.4 .mu.), of visible radiation (0.4 to 0.7 .mu.) and of infrared radiation (0.7 to 3.4 .mu.).
Claim 4
Dependent Claim
31 words
A pyranometer according to claim 1, wherein at least one internal hemispherical filter of each measuring head is a transparent filter within the range of 0.2 to 3.4 .mu. of wavelength.
Claim 5
Dependent Claim
51 words
A pyranometer according to claim 1, wherein the hemispherical filters are concentric domes which are bonded to the support of the thermoelectric detector at the point of largest diameter of each dome, a space formed between said domes being in communication with nozzles which are connected to the internal ventilation system.
Claim 6
Dependent Claim
35 words
A pyranometer according to claim 1, wherein the two faces of the thermocouple respectively on the side nearest the filters and on the side nearest the connections communicate through ducts with the internal ventilation system.
Claim 7
Dependent Claim
18 words
A pyranometer according to claim 1, wherein the internal heat removal system associates the ventilation systems in cascade.
Claim 8
Dependent Claim
18 words
A pyranometer according to claim 1, wherein the internal heat removal system associates the ventilation systems in parallel.
Claim 9
Dependent Claim
22 words
A pyranometer according to claim 1, wherein the internal ventilation systems and the heat removal system carry a circulation of dry gas.
Claim 10
Dependent Claim
12 words
A pyranometer according to claim 8, wherein the dry gas is air.
Claim 11
Dependent Claim
19 words
A pyranometer according to claim 8, wherein the dry gas belongs to the group consisting of nitrogen and argon.
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) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |