GB634982A - Improvements in or relating to frequency-sensitive electrical devices such as vibration galvanometers - Google Patents
Improvements in or relating to frequency-sensitive electrical devices such as vibration galvanometersInfo
- Publication number
- GB634982A GB634982A GB12949A GB12949A GB634982A GB 634982 A GB634982 A GB 634982A GB 12949 A GB12949 A GB 12949A GB 12949 A GB12949 A GB 12949A GB 634982 A GB634982 A GB 634982A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- strips
- galvanometers
- frequency
- dust core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R13/00—Arrangements for displaying electric variables or waveforms
- G01R13/04—Arrangements for displaying electric variables or waveforms for producing permanent records
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Optical Scanning Systems (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
634,982. Galvanometers. COLLINS, G., and WRIGHT, Sir C. S. Feb. 16, 1946, No. 129. Divided out of 634,916, [Group XL (b)]. [Class 37] A moving coil instrument particularly suitable for use in the apparatus for analysing wave-forms described in Specification 634,914 or in the electromagnetic filter described in Specification 634,916, is provided with a granular magnetic dust core of material sold under the Registered Trade Mark " Gecalloy " and moving with the coil. As shown, a coil 20 having a dust core 21 of this material is clamped between phosphor-bronze strips 19 and mounted between the soft iron poles 30 and 31 of a permanent magnet system. These strips are supported by narrower screwtensioned strips 18 which pass around rollers 16 and 17. A mirror 22 is mounted on strip 19 for use with a known optical system. The system vibrates only when the input frequency to the coil is substantially the natural frequency of the coil assembly. This is stated to be of the order of 100 cycles per second.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB12949A GB634982A (en) | 1946-02-16 | 1946-02-16 | Improvements in or relating to frequency-sensitive electrical devices such as vibration galvanometers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB12949A GB634982A (en) | 1946-02-16 | 1946-02-16 | Improvements in or relating to frequency-sensitive electrical devices such as vibration galvanometers |
Publications (1)
Publication Number | Publication Date |
---|---|
GB634982A true GB634982A (en) | 1950-03-29 |
Family
ID=9698923
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12949A Expired GB634982A (en) | 1946-02-16 | 1946-02-16 | Improvements in or relating to frequency-sensitive electrical devices such as vibration galvanometers |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB634982A (en) |
-
1946
- 1946-02-16 GB GB12949A patent/GB634982A/en not_active Expired
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