US3905706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light responsive bathyirradiometer
Assignee: United States Department of the Navy
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Filing: 1973-12-17
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Granted: 1975-09-16
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Expires: 1993-12-17
Abstract
Abstract A bathyirradiometer that is employed to measure the light levels in situ. The bathyirradiometer includes a photomultiplier that detects light that is received at its light input. A high voltage power supply supplies power to a voltage divider the output of which is connected to the dynodes of the photomultiplier tube. The voltage level of the output of the high voltage power supply is selected by a programmable high voltage regulator. The output of the photomultiplier tube is applied to the input of an automatic range device. One output of the automatic range device is applied to the programmable high voltage range detector to select the voltage to be applied across the dynodes of the photomultiplier tube. The other output of the automatic range device is applied to one input of a scanner to indicate the particular voltage range of operation. The range selection is determined by the automatic range device to achieve optimum performance of the photomultiplier tube when receiving light in predetermined light level ranges.
Inventors
- 👤 Lowell Raymond Pearl
- 👤 Roderick S Mesecar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:13
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
300 words
A bathyirradiometer comprising: a. a photomultiplier tube; b. voltage supply means operatively connected to the dynodes of said photomultiplier tube for applying dynode voltage to the dynodes of said photomultiplier tube; c. the output of said photomultiplier tube being operatively connected to the signal of a first amplifier; d. the output of said first amplifier being operatively connected to the input of an automatic range device; e. one output of said automatic range device operatively connected to said voltage supply means; f. said automatic range device controls said voltage supply means to apply predetermined discrete dynode voltages in response to predetermined discrete voltage ranges from said first amplifier; g. said automatic range device controls said voltage supply means such that said predetermined discrete dynode voltage is maximum when said predetermined discrete voltage range of said first amplifier is minimum and said predetermined discrete dynode voltage is minimum when said predetermined discrete voltage range of the first amplifier is maximum; h. said automatic range device includes second and third amplifiers, a pulse generator and a range selector; i. the output of said first amplifier being operatively connected to the input of said second amplifier and to the input of said third amplifier, said second amplifier and said third amplifier are connected to act as comparators, comparing the output of the said first amplifier with an adjustable, predetermined voltage level; j. the output of said second amplifier being operably connected to a first input of said discrete range selector; k. the output of said third amplifier being operably connected to the input of said pulse generator, the output of which is operably connected to a second input of said discrete range selector; and l. the output of said discrete range selector being operably connected to the input of said voltage supply means.
Claim 2
Dependent Claim
300 words
A bathyirradiometer comprising: a. a photomultiplier tube; b. voltage supply means operatively connected to the dynodes of said photomultiplier tube for applying dynode voltage to the dynodes of said photomultiplier tube; c. the output of said photomultiplier tube being operatively connected to the signal of a first amplifier; d. the output of said first amplifier being operatively connected to the input of an automatic range device; e. one output of said automatic range device operatively connected to said voltage supply means; f. said automatic range device controls said voltage supply means to apply predetermined discrete dynode voltages in response to predetermined discrete voltage ranges from said first amplifier; g. said automatic range device controls said voltage supply means such that said predetermined discrete dynode voltage is maximum when said predetermined discrete voltage range of said first amplifier is minimum and said predetermined discrete dynode voltage is minimum when said predetermined discrete voltage range of the first amplifier is maximum; h. said automatic range device includes second and third amplifiers, a pulse generator and a range selector; i. the output of said first amplifier being operatively connected to the input of said second amplifier and to the input of said third amplifier, said second amplifier and said third amplifier are connected to act as comparators, comparing the output of the said first amplifier with an adjustable, predetermined voltage level; j. the output of said second amplifier being operably connected to a first input of said discrete range selector; k. the output of said third amplifier being operably connected to the input of said pulse generator, the output of which is operably connected to a second input of said discrete range selector; and l. the output of said discrete range selector being operably connected to the input of said voltage supply means.
Claim 3
Dependent Claim
50 words
The bathyirradiometer of claim 1 wherein: a. said discrete range selector includes reset means and clock means; b. said first input of said discrete range selector being operably connected to said reset means; and c. said second input of said discrete range selector being operably connected to said clock means.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |