US4040058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direction finder
Assignee: Taiyo Musen Co Ltd
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Filing: 1975-03-04
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Granted: 1977-08-02
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Expires: 1995-03-04
Abstract
Abstract An automatic direction finder wherein a loop antenna is fitted within a combined handle and index rotatably pivoted at the center of a direction dial, a gear of a diameter large enough is fixed to said index and a pinion meshing with said gear is connected through a frictional power transmission with a direct current servomotor to which an automatically controlled output of said antenna obtained from the output of said antenna is given.
Inventors
- 👤 Kenzo Mori
- 👤 Fumio Kakuchi
- 👤 Kimio Fujii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:10
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/02; H01Q3/04; G; G01; G01S; G01S3/00; G01S3/02; G01S3/04; G01S3/046
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
145 words
In an automatic direction finder which comprises a combined handle and index rotatably pivoted at the center of a direction dial provided above a case, a loop antenna means contained within said index, a gear of a sufficiently large diameter fixed to said index, a direct current servomotor provided on the inside surface of said case so that an automatically controlled output of said antenna means obtained from the output of said antenna means may be given to it and a pinion connected with said direct current servomotor and meshed with said gear of the large diameter, said automatic direction finder characterized by that a frictional power transmitting means composed of said pinion, a spring, a seat plate, and a relay shaft is provided between said direct current servomotor and said gear of the large diameter, whereby said automatic direction finder can be manually operated.
Claim 2
Dependent Claim
145 words
In an automatic direction finder which comprises a combined handle and index rotatably pivoted at the center of a direction dial provided above a case, a loop antenna means contained within said index, a gear of a sufficiently large diameter fixed to said index, a direct current servomotor provided on the inside surface of said case so that an automatically controlled output of said antenna means obtained from the output of said antenna means may be given to it and a pinion connected with said direct current servomotor and meshed with said gear of the large diameter, said automatic direction finder characterized by that a frictional power transmitting means composed of said pinion, a spring, a seat plate, and a relay shaft is provided between said direct current servomotor and said gear of the large diameter, whereby said automatic direction finder can be manually operated.
Claim 3
Dependent Claim
30 words
A direction finder according to claim 1 wherein a rectangular handle and a loop antenna contained within said index is manually rotated moreover by slipping said frictional power transmitting means.
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) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |