NL7306726A - - Google Patents
Info
- Publication number
- NL7306726A NL7306726A NL7306726A NL7306726A NL7306726A NL 7306726 A NL7306726 A NL 7306726A NL 7306726 A NL7306726 A NL 7306726A NL 7306726 A NL7306726 A NL 7306726A NL 7306726 A NL7306726 A NL 7306726A
- Authority
- NL
- Netherlands
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Networks Using Active Elements (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Amplifiers (AREA)
- Measurement Of Current Or Voltage (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US27420372A | 1972-07-24 | 1972-07-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NL7306726A true NL7306726A (en:Method) | 1974-01-28 |
| NL156511B NL156511B (nl) | 1978-04-17 |
Family
ID=23047222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL7306726.A NL156511B (nl) | 1972-07-24 | 1973-05-15 | Frequentie-afwijkingsmonitor. |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3755734A (en:Method) |
| JP (2) | JPS4946776A (en:Method) |
| CA (1) | CA972036A (en:Method) |
| CH (1) | CH552219A (en:Method) |
| DE (1) | DE2325641A1 (en:Method) |
| FR (1) | FR2193978B1 (en:Method) |
| GB (1) | GB1418773A (en:Method) |
| IT (1) | IT980189B (en:Method) |
| NL (1) | NL156511B (en:Method) |
| SE (1) | SE394033B (en:Method) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4319329A (en) * | 1980-02-21 | 1982-03-09 | Iowa State University Research Foundation, Inc. | Frequency measuring and monitoring apparatus, methods and systems |
| JPS57112997U (en:Method) * | 1981-01-05 | 1982-07-13 | ||
| US4547726A (en) * | 1983-08-01 | 1985-10-15 | General Electric Company | Means and method for measuring power system frequency |
| US5721689A (en) * | 1995-12-18 | 1998-02-24 | Abb Power T&D Company Inc. | System and method for phasor estimation and frequency tracking in digital protection systems |
| US6185482B1 (en) | 1998-03-10 | 2001-02-06 | Abb Power T&D Company Inc. | System and method for rms overcurrent backup function |
| JP2010271091A (ja) | 2009-05-20 | 2010-12-02 | Seiko Epson Corp | 周波数測定装置 |
| JP5440999B2 (ja) * | 2009-05-22 | 2014-03-12 | セイコーエプソン株式会社 | 周波数測定装置 |
| JP5517033B2 (ja) | 2009-05-22 | 2014-06-11 | セイコーエプソン株式会社 | 周波数測定装置 |
| JP5582447B2 (ja) | 2009-08-27 | 2014-09-03 | セイコーエプソン株式会社 | 電気回路、同電気回路を備えたセンサーシステム、及び同電気回路を備えたセンサーデバイス |
| JP5815918B2 (ja) | 2009-10-06 | 2015-11-17 | セイコーエプソン株式会社 | 周波数測定方法、周波数測定装置及び周波数測定装置を備えた装置 |
| JP5876975B2 (ja) | 2009-10-08 | 2016-03-02 | セイコーエプソン株式会社 | 周波数測定装置及び周波数測定装置における変速分周信号の生成方法 |
| JP5883558B2 (ja) | 2010-08-31 | 2016-03-15 | セイコーエプソン株式会社 | 周波数測定装置及び電子機器 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2480128A (en) * | 1945-10-03 | 1949-08-30 | Standard Telephones Cables Ltd | Frequency measuring system |
| US3119064A (en) * | 1961-12-01 | 1964-01-21 | Hughes Aircraft Co | Quadrature phase detector employing transistor switching means |
-
1972
- 1972-07-24 US US00274203A patent/US3755734A/en not_active Expired - Lifetime
-
1973
- 1973-03-20 GB GB1345173A patent/GB1418773A/en not_active Expired
- 1973-04-02 CA CA167,657A patent/CA972036A/en not_active Expired
- 1973-04-03 JP JP48038202A patent/JPS4946776A/ja active Pending
- 1973-04-12 IT IT49412/73A patent/IT980189B/it active
- 1973-04-18 FR FR7314088A patent/FR2193978B1/fr not_active Expired
- 1973-05-15 NL NL7306726.A patent/NL156511B/xx unknown
- 1973-05-21 DE DE2325641A patent/DE2325641A1/de not_active Withdrawn
- 1973-05-24 CH CH741573A patent/CH552219A/xx not_active IP Right Cessation
- 1973-07-20 SE SE7310189A patent/SE394033B/xx unknown
-
1978
- 1978-05-02 JP JP1978060229U patent/JPS542475U/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR2193978B1 (en:Method) | 1977-07-29 |
| SE394033B (sv) | 1977-05-31 |
| CH552219A (de) | 1974-07-31 |
| GB1418773A (en) | 1975-12-24 |
| NL156511B (nl) | 1978-04-17 |
| JPS4946776A (en:Method) | 1974-05-04 |
| DE2325641A1 (de) | 1974-02-14 |
| FR2193978A1 (en:Method) | 1974-02-22 |
| US3755734A (en) | 1973-08-28 |
| CA972036A (en) | 1975-07-29 |
| IT980189B (it) | 1974-09-30 |
| JPS542475U (en:Method) | 1979-01-09 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| VJC | Lapsed due to non-payment of the due maintenance fee for the patent or patent application | ||
| NL80 | Abbreviated name of patent owner mentioned of already nullified patent |
Owner name: ABEX |