US3729264A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analyzer using the rotor of a motor as a light chopper
Assignee: Horiba Ltd
•
Filing: 1971-08-09
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Granted: 1973-04-24
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Expires: 1991-08-09
Abstract
Abstract A double light path analyzer has a light intermitter section installed between a cell section and a light source section; the intermitter section provides the magnetic rotor of a slow speed motor with vane defining aperture means and associates it to act also as the light intermitting means; and separate light sources for the two paths are adjustable axially thereof by externally operable and lockable means.
Inventors
- 👤 T Simazaki
- 👤 H Kotani
- 👤 K Isida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:58
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01N21/37
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
211 words
Improved optical apparatus for an analyzer, said apparatus being of the type having: a. a light source section comprising means for projecting light along two paths and means for controlling the relative quantities of light projected along each path, b. a light intermitting section positioned across said light paths and having vane means for intermittently interrupting the passage of the projected light along said paths, c. a cell section positioned across said paths downstream of said light intermitting section, said cell section comprising a reference cell and a sample cell interposed in said paths, respectively, and d. a detecting section having detectors respectively positioned to detect the light passed by said light intermitting section through said cell section along said respective paths, and said apparatus being improved in that: e. said light intermitting section comprises 1. a hollow cylindrical casing of non-magnetic material, 2. a cylindrical rotor of magnetic material rotatably mounted in said casing, 3. a coil installed on the inner peripheral wall surface of said casing so as to correspond to The outer periphery of said rotor and magnetic poles, with 4. the corresponding plate-like portions of said casing and rotor being provided with windows for intermitting light, the rotor itself being formed as the light intermitting vane means.
Claim 2
Dependent Claim
211 words
Improved optical apparatus for an analyzer, said apparatus being of the type having: a. a light source section comprising means for projecting light along two paths and means for controlling the relative quantities of light projected along each path, b. a light intermitting section positioned across said light paths and having vane means for intermittently interrupting the passage of the projected light along said paths, c. a cell section positioned across said paths downstream of said light intermitting section, said cell section comprising a reference cell and a sample cell interposed in said paths, respectively, and d. a detecting section having detectors respectively positioned to detect the light passed by said light intermitting section through said cell section along said respective paths, and said apparatus being improved in that: e. said light intermitting section comprises 1. a hollow cylindrical casing of non-magnetic material, 2. a cylindrical rotor of magnetic material rotatably mounted in said casing, 3. a coil installed on the inner peripheral wall surface of said casing so as to correspond to The outer periphery of said rotor and magnetic poles, with 4. the corresponding plate-like portions of said casing and rotor being provided with windows for intermitting light, the rotor itself being formed as the light intermitting vane means.
Claim 3
Dependent Claim
11 words
a cylindrical rotor of magnetic material rotatably mounted in said casing,
Claim 4
Dependent Claim
11 words
a cylindrical rotor of magnetic material rotatably mounted in said casing,
Claim 5
Dependent Claim
21 words
Improved optical apparatus as claimed in claim 1, said apparatus being further improved in that: f. said light source section comprises:
Claim 6
Dependent Claim
14 words
a holder mounting said separate light sources for relative movement axially of said paths,
Claim 7
Dependent Claim
14 words
a holder mounting said separate light sources for relative movement axially of said paths,
Claim 8
Dependent Claim
29 words
externally operable means connected to said light sources for relatively moving the same to selected positions to control the relative quantities of light projected along said light paths, and
Claim 9
Dependent Claim
29 words
externally operable means connected to said light sources for relatively moving the same to selected positions to control the relative quantities of light projected along said light paths, and
Claim 10
Dependent Claim
27 words
a coil installed on the inner peripheral wall surface of said casing so as to correspond to The outer periphery of said rotor and magnetic poles, with
Claim 11
Dependent Claim
27 words
a coil installed on the inner peripheral wall surface of said casing so as to correspond to The outer periphery of said rotor and magnetic poles, with
Claim 12
Dependent Claim
33 words
Improved optical apparatus as claimed in claim 2, wherein said externally operable means comprises regulating screws projecting from said light sources and threaded means carried by said holder adjustably engaging said regulating screws.
Claim 13
Dependent Claim
57 words
Improved optical apparatus as claimed in claim 2, wherein said light sources comprise cylindrical supporting members provided with external screw threads and longitudinally grooves, means engaging said longitudinal grooves to permit only longitudinal movement of said supporting members, and adjustable rings engaged with said holder and threadedly engaging said external screw threads for effecting such longitudinal movement.
Claim 14
Dependent Claim
27 words
the corresponding plate-like portions of said casing and rotor being provided with windows for intermitting light, the rotor itself being formed as the light intermitting vane means.
Claim 15
Dependent Claim
27 words
the corresponding plate-like portions of said casing and rotor being provided with windows for intermitting light, the rotor itself being formed as the light intermitting vane means.
Claim 16
Dependent Claim
13 words
set screw means for locking said separate light sources in such selected positions.
Claim 17
Dependent Claim
13 words
set screw means for locking said separate light sources in such selected positions.
References Cited (Backward Citations)
US2698390A
Cited
US2933600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |