Patent JPS58222331A successfully refreshed from Google Patents.
US3583223A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Infrared television system for temperature measurement
Assignee: Saab Bofors AB
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Filing: 1968-09-23
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Granted: 1971-06-08
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Expires: 1988-09-23
Abstract
Abstract An infrared television system for measuring temperature which has a brightness control circuit including two potentiometers connected in parallel with a direct voltage source and having their movable contacts connected to a summation circuit for producing a voltage equal to the sum of the voltages derived from the movable contacts, the control knob of one potentiometer being combined with a scale graduated in degrees in both the positive and negative directions from a zero point.
Inventors
- 👤 Tore Bertil Reinhold Olsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:39
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/20; H04N23/23
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
311 words
An improvement in thermography equipment of the kind producing on the picture screen of a cathode-ray tube a picture made up of lighter and darker areas corresponding to areas of higher and lower surface temperatures of a depicted object, said equipment comprising a camera having scanning means and detecting means sensitive to infrared radiation for producing video signals varying in intensity according to the temperature of scanned points on an object placed in the field of view of the camera, a video amplifier for amplifying said video signals, intensity control means for controlling the intensity of the electron beam in said cathode-ray tube, means for applying the amplified video signals to said intensity control means, means for causing said beam to sweep across the picture screen of the cathode-ray tube in a pattern corresponding to the scanning pattern of said scanning means of the camera, and manually operable control means connected to said intensity control means for varying a voltage controlling the brightness of the picture on the picture screen of the cathode-ray tube, wherein said improvement resides in said manually operable control means including: a voltage source; a first manually adjustable potentiometer and a second manually adjustable potentiometer connected in circuit to generate said brightness control voltage so that said control voltage is dependent on the settings of both potentiometers, said first potentiometer comprising a setting member coacting with a graduated scale for reading the position of the setting member, whereby the temperature difference between any two points on the depicted object is measurable by first setting said first potentiometer to a zero point on said scale, then setting the second potentiometer so as to cause a first point on the picture to assume a predetermined brightness, then again setting the first potentiometer to cause a second point on the picture to assume said predetermined brightness and reading said scale.
Claim 2
Dependent Claim
311 words
An improvement in thermography equipment of the kind producing on the picture screen of a cathode-ray tube a picture made up of lighter and darker areas corresponding to areas of higher and lower surface temperatures of a depicted object, said equipment comprising a camera having scanning means and detecting means sensitive to infrared radiation for producing video signals varying in intensity according to the temperature of scanned points on an object placed in the field of view of the camera, a video amplifier for amplifying said video signals, intensity control means for controlling the intensity of the electron beam in said cathode-ray tube, means for applying the amplified video signals to said intensity control means, means for causing said beam to sweep across the picture screen of the cathode-ray tube in a pattern corresponding to the scanning pattern of said scanning means of the camera, and manually operable control means connected to said intensity control means for varying a voltage controlling the brightness of the picture on the picture screen of the cathode-ray tube, wherein said improvement resides in said manually operable control means including: a voltage source; a first manually adjustable potentiometer and a second manually adjustable potentiometer connected in circuit to generate said brightness control voltage so that said control voltage is dependent on the settings of both potentiometers, said first potentiometer comprising a setting member coacting with a graduated scale for reading the position of the setting member, whereby the temperature difference between any two points on the depicted object is measurable by first setting said first potentiometer to a zero point on said scale, then setting the second potentiometer so as to cause a first point on the picture to assume a predetermined brightness, then again setting the first potentiometer to cause a second point on the picture to assume said predetermined brightness and reading said scale.
Claim 3
Dependent Claim
61 words
A control means as claimed 1, in which said scale of the first potentiometer is graduated for setting to extreme positions in positive and negative sense with reference to a zero point, and the setting of said setting member to the zero point corresponds to a position of a movable contact of said first potentiometer about halfway between the extreme positions.
Claim 4
Dependent Claim
17 words
A control means as claimed in claim 1, in which said scale is graduated in temperature degrees.
Claim 5
Dependent Claim
52 words
A control means as claimed in claim 1 in which said first and second potentiometers are connected in parallel with each other and to a direct voltage source, the setting members of the potentiometers comprising movable contacts, and wherein a summation device is connected to the potentiometers for adding the derived voltages.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |