US3569717A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation measuring and integrating device
Assignee: D Mac Ltd
•
Filing: 1969-10-14
•
Granted: 1971-03-09
•
Expires: 1989-10-14
Abstract
Abstract A radiation measuring device applicable to the measurement of direct radiation incident over a time interval and particularly applicable to the measurement of the net radiation, e.g. solar radiation, absorbed by a surface over a time interval. In the latter application, radiation sensitive devices are exposed to direct radiation and radiation reflected from the surface, respectively. A bridge circuit becomes unbalanced and supplies a signal to an analogue-digital converter. The output of the converter is integrated in an integrator to give a signal proportional to the net radiation absorbed over a time interval.
Inventors
- 👤 Oluyinka A Awojobi
- 👤 Paul M Dunachie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:09
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10; G01J5/28; G01J5/30; G01J1/00; G01J1/10; G01J1/16; G01J1/1626
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
88 words
A radiation indicating device including a bridge circuit connected with, and to be energized through, a voltage stabilizing circuit, a radiation sensitive element being connected in one arm of the bridge, an analogue-digital converter connected to the output of the bridge circuit and an integrator connected with the output of the analogue-digital converter, whereby on exposure of the radiation sensitive element to radiation the bridge circuit becomes unbalanced and a signal proportional to the radiation incident over A time interval is obtained at the output of the integrator.
Claim 2
Dependent Claim
88 words
A radiation indicating device including a bridge circuit connected with, and to be energized through, a voltage stabilizing circuit, a radiation sensitive element being connected in one arm of the bridge, an analogue-digital converter connected to the output of the bridge circuit and an integrator connected with the output of the analogue-digital converter, whereby on exposure of the radiation sensitive element to radiation the bridge circuit becomes unbalanced and a signal proportional to the radiation incident over A time interval is obtained at the output of the integrator.
Claim 3
Dependent Claim
19 words
A radiation indicating device as claimed in claim 1, in which the radiation sensitive device is a silicon diode.
Claim 4
Dependent Claim
33 words
A radiation indicating device as claimed in claim 1, in which a second radiation sensitive device is connected in the other arm of the bridge, whereby two intensities of radiation may be compared.
Claim 5
Dependent Claim
61 words
A radiation indicating device as claimed in claim 3, in which the radiation sensitive devices are silicon diodes mounted back to back on a common heat sink, whereby the device may be used to indicate the net absorbed radiation of a surface by exposing one diode to direct solar radiation and the other diode to solar radiation reflected from the surface.
Claim 6
Dependent Claim
39 words
A radiation indicating device as claimed in claim 1, including an operational amplifier, the input of which is connected with the output of the bridge and the output of which is connected with the input of the analogue-digital converter.
Claim 7
Dependent Claim
33 words
A radiation indicating device as claimed in claim 1, in which the analogue-digital converter is in the form of a voltage-frequency converter, supplying output pulses of a frequency proportional to the input voltage.
Claim 8
Dependent Claim
25 words
A radiation indicating device as claimed in claim 1, in which the integrator is an impulse motor stepping at the frequency of the output pulses.
References Cited (Backward Citations)
US3327116A
Cited
US3329822A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |