Patent US3949231A successfully refreshed from Google Patents.
US3949231A
Expired / Lapsed
US
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Infrared radiating unit for infrared analyzers
Assignee: H Maihak AG
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Filing: 1975-04-10
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Granted: 1976-04-06
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Expires: 1995-04-10
Abstract
Abstract A cylindrically shaped coil of resistance wire constitutes a source of infrared radiation which is located within a reflector comprised of a curved reflector section having a reflecting surface shaped to resemble an axially bisected rotationally symmetrical paraboloid, and a cylindrical reflector section which extends from an open side of the curved reflector section. The focal points of the reflecting surface are located on a circle which coincides with the outer circumference of the cylindrically shaped coil.
Inventors
- 👤 Otto Blunck
- 👤 Heinz Delin
- 👤 Rudolf Muller
- 👤 Werner Voss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:43
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/10; H05B3/16; A; A61; A61N; A61N5/00; A61N5/06; F; F24; F24C; F24C7/00; F24C7/06; F24C7/062; F24C7/065; G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01N21/37
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
79 words
An infrared radiating unit for infrared analyzers, comprising a cylindrically shaped source of infrared radiation; and a reflector partly surrounding said source and comprising a curved reflector section having a reflecting surface shaped to resemble an axially bisected rotationally symmetrical paraboloid, and a cylindrical reflector section extending from an open side of said curved reflector section, the focal points of the reflecting surface being located on a circle which coincides with the outer circumference of said cylindrically shaped source.
Claim 2
Dependent Claim
79 words
An infrared radiating unit for infrared analyzers, comprising a cylindrically shaped source of infrared radiation; and a reflector partly surrounding said source and comprising a curved reflector section having a reflecting surface shaped to resemble an axially bisected rotationally symmetrical paraboloid, and a cylindrical reflector section extending from an open side of said curved reflector section, the focal points of the reflecting surface being located on a circle which coincides with the outer circumference of said cylindrically shaped source.
Claim 3
Dependent Claim
15 words
A unit as defined in claim 1, wherein said source is of hollow cylindrical configuration.
Claim 4
Dependent Claim
14 words
A unit as defined in claim 2, wherein said reflector is of rust-resistant steel.
Claim 5
Dependent Claim
21 words
A unit as defined in claim 2, wherein said reflector is of a material having a low coefficient of thermal conductivity.
Claim 6
Dependent Claim
15 words
A unit as defined in claim 2, wherein at least said reflecting surface is gold-plated.
Claim 7
Dependent Claim
31 words
A unit as defined in claim 2; further comprising a mount for said reflector, said mount engaging said reflector in a manner to reduce the conduction of thermal energy between them.
Claim 8
Dependent Claim
27 words
A unit as defined in claim 6; further comprising a carrier of ceramic material for said source; and wherein said source is a coil of resistance wire.
Claim 9
Dependent Claim
29 words
A unit as defined in claim 7, said carrier having a first portion outside said reflector, and a second reduced-diameter portion extending into said reflector and carrying said coil.
Claim 10
Dependent Claim
24 words
A unit as defined in claim 7; and further comprising clamping means replaceably clamping said carrier to said mount for axial and angular adjustment.
Claim 11
Dependent Claim
45 words
A unit as defined in claim 2; further comprising a carrier having at least a portion located within said reflector; said source comprising a metallic sleeve mounted on said portion and having axially spaced flanges, and a heating coil surrounding said sleeve intermediate said flanges.
Claim 12
Dependent Claim
14 words
A unit as defined in claim 10, wherein said sleeve is of rust-resistant steel.
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) | 1979-04-06 | 1979-10-06 | 1980-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-06 | 1983-10-06 | 1984-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-06 | 1987-10-06 | 1988-04-06 | $7700.00 | Window Closed / Lapsed |