Patent US3750714A successfully refreshed from Google Patents.
US4485305A
Expired / Lapsed
US
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Infrared detector with vibrating chopper
Assignee: Sanyo Electric Co Ltd
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Filing: 1982-08-12
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Granted: 1984-11-27
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Expires: 2002-08-12
Abstract
Abstract An infrared ray detector comprising an infrared ray detecting body, a pair of opposing portions, a bimorph vibrator connected to the pair of opposing portions for intermitting infrared rays incident upon the detector, and a housing containing these elements, the housing being provided with an opening for incidence of infrared rays. The pair of opposing portions comprise infrared ray transmitting portions and infrared ray non-transmitting portions. The infrared ray transmitting portions in one of opposing portions is periodically overlapped by the bimorph vibrator with the infrared ray transmitting portions or infrared ray non-transmitting portions in the other opposing portion, so that incident infrared rays are intermitted.
Inventors
- 👤 Yukinori Kuwano
- 👤 Shoichi Nakano
- 👤 Toshiaki Yokoo
- 👤 Kenichi Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:52
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/18; G08B13/189; G08B13/19; G01; G01J; G01J5/00; G01J5/02; G01J5/08; G01J5/0803; G01J5/0805; G01J5/10; G01J5/34; G08B17/00; G08B17/12; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/314; G01N21/35; G01N21/3504; H; H10; H10W; H10W90/00; H10W90/701; H10W90/751; H10W90/753
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
168 words
An infrared ray detector comprising: an infrared ray detecting body, a pair of opposing portions having a plurality of infrared ray non-transmitting portions and infrared ray transmitting portions, intermitting means for intermitting infrared rays incident upon said infrared ray detecting body through said pair of opposing portions, said intermitting means comprising a vibrator connected to one of said pair of opposing portions, wherein a state that the infrared ray transmitting portions of both opposing portions are substantially overlapped with respect to each other and the infrared ray non-transmitting portions of both opposing portions are substantially overlapped with respect to each other, and a state that the infrared ray non-transmitting portions and transmitting portions of one opposing portion are substantially overlapped with the infrared ray transmitting portions and non-transmitting portions of the other opposing portion, respectively, are alternately repeated, and a housing containing said infrared ray detecting body, said pair of opposing portions and said intermitting means, said housing being provided with an opening for incidence of infrared rays.
Claim 2
Dependent Claim
168 words
An infrared ray detector comprising: an infrared ray detecting body, a pair of opposing portions having a plurality of infrared ray non-transmitting portions and infrared ray transmitting portions, intermitting means for intermitting infrared rays incident upon said infrared ray detecting body through said pair of opposing portions, said intermitting means comprising a vibrator connected to one of said pair of opposing portions, wherein a state that the infrared ray transmitting portions of both opposing portions are substantially overlapped with respect to each other and the infrared ray non-transmitting portions of both opposing portions are substantially overlapped with respect to each other, and a state that the infrared ray non-transmitting portions and transmitting portions of one opposing portion are substantially overlapped with the infrared ray transmitting portions and non-transmitting portions of the other opposing portion, respectively, are alternately repeated, and a housing containing said infrared ray detecting body, said pair of opposing portions and said intermitting means, said housing being provided with an opening for incidence of infrared rays.
Claim 3
Dependent Claim
27 words
An infrared ray detector in accordance with claim 1, wherein the two dimensional shape of said infrared ray transmitting portions and infrared ray non-transmitting portions are linear.
Claim 4
Dependent Claim
37 words
An infrared ray detector in accordance with claim 1, wherein said infrared ray detecting body comprises a pyroelectric type infrared ray detecting body for generating electric charges according to an amount of change of incident infrared rays.
Claim 5
Dependent Claim
20 words
An infrared ray detector in accordance with claim 1, which further comprises an infrared ray transmitting filter closing said opening.
Claim 6
Dependent Claim
47 words
An infrared ray detector in accordance with claim 1, which further comprises an impedance converter circuit connected to said infrared ray detecting body, said impedance converter circuit converting an output impedance of the infrared ray detecting body into a low resistance, and being contained within said housing.
Claim 7
Dependent Claim
35 words
An infrared ray detector in accordance with claim 5, which further comprises a shield element for shielding said infrared ray detecting body and said impedance converter circuit from an electrical noise due to said vibrator.
Claim 8
Dependent Claim
39 words
An infrared ray detector in accordance with claim 6, wherein said shield element is provided with an incident port of infrared rays, the other of said pair of opposing portions being sticked to said incident port of infrared rays.
Claim 9
Dependent Claim
30 words
An infrared ray detector in accordance with claim 1, which further comprises a shield element for shielding said infrared ray detecting body from an electrical noise due to said vibrator.
Claim 10
Dependent Claim
39 words
An infrared ray detector in accordance with claim 8, wherein said shield element is provided with an incident port of infrared rays, the other of said pair of opposing portions being sticked to said incident port of infrared rays.
Claim 11
Dependent Claim
46 words
An infrared ray detector in accordance with claim 1, which further comprises a filter closing said opening and being mounted in the vicinity of said opening, and wherein the other of said pair of opposing portions is sticked to the inner surface side of said filter.
Claim 12
Dependent Claim
29 words
An infrared ray detector in accordance with claim 1, wherein said vibrator is disposed such that the longitudinal direction thereof is coincident with an incident direction of infrared ray.
Claim 13
Dependent Claim
32 words
An infrared ray detector in accordance with claim 1, wherein one of said pair of opposing portions is disposed so as to vibrate in a direction parallel to the other opposing portion.
Claim 14
Dependent Claim
33 words
An infrared ray detector in accordance with claim 12, wherein said vibrator is disposed such that the longitudinal direction thereof is coincident with a direction perpendicular to said incident direction of infrared rays.
Claim 15
Dependent Claim
88 words
An infrared ray detector in accordance with claim 1, wherein said infrared ray transmitting portions and infrared ray non-transmitting portions of said pair of opposing portions are shaped such that the infrared ray transmitting portions in one opposing portion are completely overlapped with the infrared ray non-transmitting portions in the other opposing portion when shutting off the infrared rays and the infrared ray transmitting portions in one opposing portion are completely overlapped with the infrared ray transmitting portions in the other opposing portion when transmitting the infrared rays.
Claim 16
Dependent Claim
121 words
An infrared ray detector in accordance with claim 14, wherein said pair of opposing portions are structured such that the shape and size of the infrared ray transmitting portions and infrared ray non-transmitting portions of one opposing portion are the same with respect to each other and the lengths in directions of vibration of the infrared ray transmitting portions are respectively 1/n of amounts of displacement based on vibration of the respective portion, wherein n is an integer, and the shape and size of the infrared ray transmitting portions and infrared ray non-transmitting portions in the other opposing portion are the same as those of the infrared ray transmitting portions and the infrared ray non-transmitting portions in said one opposing portion.
Claim 17
Dependent Claim
16 words
An infrared ray detector in accordance with claim 1, wherein said vibrator comprises a piezoelectric vibrator.
Claim 18
Dependent Claim
46 words
An infrared ray detector in accordance with claim 1, which further comprises infrared ray transmitting filter opposed to said opening, said infrared ray transmitting filter being a narrow band infrared ray filter for substantially transmitting only an infrared ray absorbed by the gas to be detected.
Claim 19
Dependent Claim
54 words
An infrared ray detector in accordance with claim 1, which further comprises a plurality of infrared ray filters opposed to said opening, and wherein said infrared ray detecting body comprises a plurality of detecting portions, a plurality of said filters being provided opposing to each of said detecting portions and having inherent transmitting band.
Claim 20
Dependent Claim
40 words
An infrared ray detector in accordance with claim 18, wherein said plurality of filters comprise filters transmitting an infrared ray radiated from fire for fire prevention and filters transmitting an infrared ray radiated from human body for human body detection.
Claim 21
Dependent Claim
33 words
An infrared ray detector in accordance with claim 18, wherein said plurality of detecting portions are connected in such a manner that directions of polarization for each pair are opposite to each other.
Claim 22
Dependent Claim
21 words
An infrared ray detector in accordance with claim 18, wherein said plurality of detecting portions are arrayed in a matrix manner.
Claim 23
Dependent Claim
169 words
An infrared ray detector comprising: an infrared ray detecting body, a pair of opposing portions having a plurality of infrared ray non-transmitting portions and infrared ray transmitting portions, intermitting means for intermitting infrared rays incident upon said infrared ray detecting body through said pair of opposing portions, said intermitting means comprising a pair of vibrators connected to said pair of opposing portions, respectively, wherein a state that the infrared ray transmitting portions of both opposing portions are substantially overlapped with respect to each other and the infrared ray non-transmitting portions of both opposing portions are substantially overlapped with respect to each other, and a state that the infrared ray non-transmitting portions and transmitting portions of one opposing portion are substantially overlapped with the infrared ray transmitting portions and non-transmitting portions of the other opposing portion, respectively, are alternately repeated, and a housing containing said infrared ray detecting body, said pair of opposing portions and said intermitting means, said housing being provided with an opening for incidence of infrared rays.
Claim 24
Dependent Claim
169 words
An infrared ray detector comprising: an infrared ray detecting body, a pair of opposing portions having a plurality of infrared ray non-transmitting portions and infrared ray transmitting portions, intermitting means for intermitting infrared rays incident upon said infrared ray detecting body through said pair of opposing portions, said intermitting means comprising a pair of vibrators connected to said pair of opposing portions, respectively, wherein a state that the infrared ray transmitting portions of both opposing portions are substantially overlapped with respect to each other and the infrared ray non-transmitting portions of both opposing portions are substantially overlapped with respect to each other, and a state that the infrared ray non-transmitting portions and transmitting portions of one opposing portion are substantially overlapped with the infrared ray transmitting portions and non-transmitting portions of the other opposing portion, respectively, are alternately repeated, and a housing containing said infrared ray detecting body, said pair of opposing portions and said intermitting means, said housing being provided with an opening for incidence of infrared rays.
Claim 25
Dependent Claim
47 words
An infrared ray detector in accordance with claim 22, which further comprises an impedance converter circuit connected to said infrared ray detecting body, said impedance converter circuit converting an output impedance of the infrared ray detecting body into a low resistance, and being contained within said housing.
Claim 26
Dependent Claim
30 words
An infrared ray detector in accordance with claim 22, which further comprises a shield element for shielding said infrared ray detecting body from an electrical noise due to said vibrator.
Claim 27
Dependent Claim
31 words
An infrared ray detector in accordance with claim 22, wherein said pair of vibrators are disposed so that the longitudinal direction thereof is coincident with an incident direction of infrared rays.
Claim 28
Dependent Claim
35 words
An infrared ray detector in accordance with claim 22, wherein said pair of vibrators are disposed so that the longitudinal direction thereof is coincident with a direction perpendicular to an incident direction of infrared rays.
Claim 29
Dependent Claim
17 words
An infrared ray detector in accordance with claim 22, wherein said pair of vibrators comprise piezoelectric vibrators.
Claim 30
Dependent Claim
55 words
An infrared ray detector in accordance with claim 22, which further comprises a plurality of infrared ray filters opposed to said opening, and wherein said infrared ray detecting body comprises a plurality of detecting portions, and a plurality of said filters are provided opposing to each of said detecting portions and having inherent transmitting band.
Claim 31
Dependent Claim
40 words
An infrared ray detector in accordance with claim 28, wherein said plurality of filters comprise filters transmitting an infrared ray radiated from fire for fire prevention and filters transmitting an infrared ray radiated from human body for human body detection.
Claim 32
Dependent Claim
33 words
An infrared ray detector in accordance with claim 28, wherein said plurality of detecting portions are connected in such a manner that directions of polarization for each pair are opposite to each other.
Claim 33
Dependent Claim
21 words
An infrared ray detector in accordance with claim 28, wherein said plurality of detecting portions are arrayed in a matrix manner.
Claim 34
Dependent Claim
37 words
An infrared ray detector in accordance with claim 22, wherein said infrared ray detecting body comprises a pyroelectric type infrared ray detecting body for generating electric charges according to an amount of change of incident infrared rays.
Claim 35
Dependent Claim
20 words
An infrared ray detector in accordance with claim 22, which further comprises an infrared ray transmitting filter closing said opening.
Claim 36
Dependent Claim
121 words
An infrared ray detector in accordance with claim 33, wherein said pair of opposing portions are structured such that the shape and size of the infrared ray transmitting portions and infrared ray non-transmitting portions of one opposing portion are the same with respect to each other and the lengths in directions of vibration of the infrared ray transmitting portions are respectively 1/n of amounts of displacement bases on vibration of the respective portion, wherein n is an integer, and the shape and size of the infrared ray transmitting portions and infrared ray non-transmitting portions in the other opposing portion are the same as those of the infrared ray transmitting portions and the infrared ray non-transmitting portions in said one opposing portion.
Claim 37
Dependent Claim
88 words
An infrared ray detector in accordance with claim 22, wherein said infrared ray transmitting portions and infrared ray non-transmitting portions of said pair of opposing portions are shaped such that the infrared ray transmitting portions in one opposing portion are completely overlapped with the infrared ray non-transmitting portions in the other opposing portion when shutting off the infrared rays and the infrared ray transmitting portions in one opposing portion are completely overlapped with the infrared ray transmitting portions in the other opposing portion when transmitting the infrared rays.
Claim 38
Dependent Claim
71 words
An infrared ray detector in accordance with claim 35, which further comprises an impedance converter circuit connected with said infrared ray detecting body, the impedance converter circuit converting an output impedance of the infrared ray detecting body into a low resistance, and being continued with said housing, and a shield element for shielding said infrared ray detecting body and said impedance converter circuit from an electrical noise due to said vibrator.
Claim 39
Dependent Claim
46 words
An infrared ray detector in accordance with claim 22, which further comprises infrared ray transmitting filter opposed to said opening, said infrared ray transmitting filter being a narrow band infrared ray filter for substantially transmitting only an infrared ray absorbed by the gas to be detected.
References Cited (Backward Citations)
US3175092A
Cited
US3925668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-27 | 1988-05-28 | 1988-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-27 | 1992-05-28 | 1992-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-27 | 1996-05-28 | 1996-11-27 | $7700.00 | Window Closed / Lapsed |