US5054936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensor for active thermal detection
Assignee: Kaz USA Inc
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Filing: 1989-11-16
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Granted: 1991-10-08
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Expires: 2009-11-16
Abstract
Abstract A first heater is attached to a sensor capable of emitting thermal radiation toward an object to be sensed. Electrical energy provided to the heater, required to maintain the sensor at a predetermined temperature when it is radiating energy toward the object is monitored by a circuit which provides a signal that is indicative of the required energy. A second heater provides a baseline temperature for the sensor. For greater accuracy, two sensors are heated by a common baseline heater. One of the sensors is shielded from radiation toward the object and controls the baseline heater, the other sensor emits thermal radiation toward the object and has a heater for maintaining it at a predetermined temperature for providing the signal indicative of the required energy as described above.
Inventors
- 👤 Jacob Fraden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:18
CPC Classifications
H; H10; H10F; H10F99/00; G; G01; G01J; G01J5/00; G01J5/02; G01J5/06; G01J5/061; G01J5/10; G01J5/12; G01J5/14; G01J5/16; G01J5/20; G01J5/22; G01J5/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
100 words
An apparatus for thermal sensing of an object by emitting thermal radiation toward said object, said apparatus comprising: an active thermal radiation sensor capable of emitting thermal radiation, said sensor including: a first temperature sensitive means, a first means for heating by receiving electrical energy, attached to said temperature sensitive means for heating said first temperature sensitive means, and means for providing a first signal indicative of electrical heating energy received by said means for heating, required to maintain said temperature sensitive means at a predetermined temperature upon radiation of thermal energy from said active radiation sensor toward said object.
Claim 2
Independent Claim
100 words
An apparatus for thermal sensing of an object by emitting thermal radiation toward said object, said apparatus comprising: an active thermal radiation sensor capable of emitting thermal radiation, said sensor including: a first temperature sensitive means, a first means for heating by receiving electrical energy, attached to said temperature sensitive means for heating said first temperature sensitive means, and means for providing a first signal indicative of electrical heating energy received by said means for heating, required to maintain said temperature sensitive means at a predetermined temperature upon radiation of thermal energy from said active radiation sensor toward said object.
Claim 3
Dependent Claim
37 words
An apparatus as described in claim 1, said apparatus further comprising: a second means for heating by receiving electrical energy, attached to said active thermal radiation sensor for providing a baseline temperature for said temperature sensitive means.
Claim 4
Dependent Claim
35 words
An apparatus as described in claim 1, further comprising: shutter means for interrupting thermal radiation, adapted for mounting adjacent to said thermal radiation sensor for interrupting radiation from said thermal radiation sensor toward said object.
Claim 5
Dependent Claim
57 words
An apparatus as described in claim 3, further comprising: said shutter means including a highly emissive surface for positioning adjacent to said active thermal radiation sensor, said apparatus further comprising: a second temperature sensitive means mounted in said apparatus for measuring the temperature of said shutter means for providing a second electrical signal indicative of ambient temperature.
Claim 6
Dependent Claim
26 words
An apparatus as described in claim 3, further comprising: said shutter means including a highly reflective surface for positioning adjacent to said active thermal radiation sensor.
Claim 7
Independent Claim
189 words
An apparatus for thermal sensing of an object by emitting thermal radiation toward said object, said apparatus comprising: an active thermal radiation sensor capable of emitting thermal radiation, said sensor comprising: a first temperature sensitive means, a first means for heating by receiving electrical energy, attached to said temperature sensitive means for heating said first temperature sensitive means, said first temperature sensitive means being for producing a first electrical signal responsive to the temperature of said first temperature sensitive means, said apparatus further comprising: electrical circuit means responsive to said first electrical signal for controlling electrical heating energy received by said first means for heating, connected to said first temperature sensitive means for sensing said first signal and connected to said first means for heating for controlling said energy received by said first means for heating for maintaining said first temperature sensitive means at a predetermined temperature, said electrical circuit means further comprising means for providing a second signal indicative of electrical energy required to maintain said first temperature sensitive means at the predetermined temperature, upon radiation of thermal energy from said active thermal radiation sensor toward said object.
Claim 8
Independent Claim
189 words
An apparatus for thermal sensing of an object by emitting thermal radiation toward said object, said apparatus comprising: an active thermal radiation sensor capable of emitting thermal radiation, said sensor comprising: a first temperature sensitive means, a first means for heating by receiving electrical energy, attached to said temperature sensitive means for heating said first temperature sensitive means, said first temperature sensitive means being for producing a first electrical signal responsive to the temperature of said first temperature sensitive means, said apparatus further comprising: electrical circuit means responsive to said first electrical signal for controlling electrical heating energy received by said first means for heating, connected to said first temperature sensitive means for sensing said first signal and connected to said first means for heating for controlling said energy received by said first means for heating for maintaining said first temperature sensitive means at a predetermined temperature, said electrical circuit means further comprising means for providing a second signal indicative of electrical energy required to maintain said first temperature sensitive means at the predetermined temperature, upon radiation of thermal energy from said active thermal radiation sensor toward said object.
Claim 9
Dependent Claim
33 words
An apparatus as described in claim 6, said apparatus further comprising: a second means for heating, attached to said active thermal radiation sensor for providing a baseline temperature for said temperature sensitive means.
Claim 10
Dependent Claim
65 words
An apparatus as described in claim 6, further comprising: a second temperature sensitive means attached to said active thermal radiation sensor, and means for preventing thermal energy from being radiated toward said object from said second temperature sensitive means, a second means for heating by receiving electrical energy, attached to said active thermal radiation sensor for equally heating said first and second temperature sensitive means.
Claim 11
Dependent Claim
97 words
An apparatus as described in claim 8, further comprising: said second temperature sensitive means further being for producing a third electrical signal responsive to the temperature of said second temperature sensitive means, said apparatus further comprising: a second electrical circuit means responsive to said third electrical signal for controlling electrical energy received by said second heating means, connected to said second temperature sensitive means for sensing said third signal and connected to said second heating means for controlling said energy received by said second heating means for maintaining said second temperature sensitive means at a predetermined temperature.
References Cited (Backward Citations)
US3915003A
Cited
US4061917A
Cited
US4158965A
Cited
US4544441A
Cited
US4574263A
Cited
US4673300A
Cited
US4501504A
Cited
US4602352A
Cited
US4682032A
Cited
US4740702A
Cited
US4808009A
Cited
US4854730A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-07 | 1995-04-08 | 1995-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-07 | 1999-04-08 | 1999-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-07 | 2003-04-08 | 2003-10-08 | $7700.00 | Window Closed / Lapsed |