GB1288946A – – Google Patents
GB1288946A – – Google Patents
Info
Publication number
GB1288946A
GB1288946A
GB1288946DA
GB1288946A
GB 1288946 A
GB1288946 A
GB 1288946A
GB 1288946D A
GB1288946D A
GB 1288946DA
GB 1288946 A
GB1288946 A
GB 1288946A
Authority
GB
United Kingdom
Prior art keywords
conducting means
conductors
primary
magnetic field
leaf springs
Prior art date
1968-12-27
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
Application number
Priority date (The priority date 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 date listed.)
1968-12-27
Filing date
1969-12-16
Publication date
1972-09-13
1969-12-16
Application filed
filed
Critical
1972-09-13
Publication of GB1288946A
publication
Critical
patent/GB1288946A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G01—MEASURING; TESTING
G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
G01R33/00—Arrangements or instruments for measuring magnetic variables
G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
G01R33/028—Electrodynamic magnetometers
G01R33/0283—Electrodynamic magnetometers in which a current or voltage is generated due to relative movement of conductor and magnetic field
H—ELECTRICITY
H01—ELECTRIC ELEMENTS
H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
H01J49/00—Particle spectrometers or separator tubes
H01J49/02—Details
H01J49/022—Circuit arrangements, e.g. for generating deviation currents or voltages ; Components associated with high voltage supply
Abstract
1288946 Measuring magnetic fields LKBPRODUKTER AB 16 Dec 1969 [27 Dec 1968] 61313/69 Heading G1N In a device for measuring the square of the magnitude of a magnetic field, e.g. to determine mass number, a mechanically oscillatable system comprising resiliently suspended conducting means is arranged in the magnetic field and energized by an A. C. source having a frequency higher than the natural frequency of the system and lower than the natural frequency of the individual components of the system, the voltage induced in the conducting means being proportional to the square of the magnetic field. As shown, the conducting means comprise a pair of electrically connected conductors 3 suspended at their ends by leaf springs. The induced voltage is measured by a bridge circuit which may be manually balanced by a resistor 7 having a suitably graduated scale. The ohmic and greater part of part of the inductive voltage drop which occur using the above device can be avoided by providing secondary conducting means mechanically coupled to the primary conducting means. The secondary means may be a pair of connected wires insulatedly mounted inside primary conductor tubes 3, Fig. 2 (not shown), or arranged on each side of the primary conductors 3, suspended by leaf springs, and connected to the conductors 3 by insulating struts, Figs.3, 4a, 4b (not shown). The secondary conductors may alternatively be rods or tubes which are hinged by leaf springs at their centre and connected by struts to the primary conductors 3, which may also be hinged at their centre, Figs. 5 and 6 (not shown). As shown in Fig. 7, the primary conducting means 34 are energized by an A. C. source 36, and the secondary conducting means 35 are connected in series to one input of an operational amplifier 41 and an output terminal 44. The other input of the amplifier 41 is derived from a potentiometer 39 whose scale is calibrated and slide 11 adjustable to provide zero reading at the terminals 44.
GB1288946D
1968-12-27
1969-12-16
Expired
GB1288946A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
SE17821/68A
SE335884B
(en)
1968-12-27
1968-12-27
Publications (1)
Publication Number
Publication Date
GB1288946A
true
GB1288946A
(en)
1972-09-13
Family
ID=20304023
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB1288946D
Expired
GB1288946A
(en)
1968-12-27
1969-12-16
Country Status (5)
Country
Link
US
(1)
US3614490A
(en)
DE
(1)
DE1964623C3
(en)
FR
(1)
FR2027210A1
(en)
GB
(1)
GB1288946A
(en)
SE
(1)
SE335884B
(en)
Families Citing this family (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
SE361946B
(en)
*
1973-03-01
1973-11-19
Lkb Produkter Ab
GB2315771A
(en)
*
1996-07-26
1998-02-11
Kao Corp
Non-foamable gel shaving composition
GB0329959D0
(en)
*
2003-12-24
2004-01-28
Qinetiq Ltd
Magnetic field sensor
Family Cites Families (6)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2435487A
(en)
*
1943-02-01
1948-02-03
Zenith Radio Corp
Electromechanical vibrator
US2478712A
(en)
*
1947-04-03
1949-08-09
Crosley Broadcasting Corp
Electrodynamic phonograph pickup
US2926313A
(en)
*
1955-04-12
1960-02-23
Elgin Nat Watch Co
Electromotive vibrator and oscillator systems
US2854581A
(en)
*
1955-11-11
1958-09-30
Ferranti Ltd
Beat frequency oscillator
US3493851A
(en)
*
1966-01-27
1970-02-03
Mogilevsky V M
Vibration magnetometer for measuring tangential component of magnetic field on flat surface of ferromagnetic samples
US3496391A
(en)
*
1967-12-07
1970-02-17
Clarence Hunter Mcshan
Resonant device
1968
1968-12-27
SE
SE17821/68A
patent/SE335884B/xx
unknown
1969
1969-12-16
GB
GB1288946D
patent/GB1288946A/en
not_active
Expired
1969-12-23
DE
DE1964623A
patent/DE1964623C3/en
not_active
Expired
1969-12-23
US
US887547A
patent/US3614490A/en
not_active
Expired – Lifetime
1969-12-24
FR
FR6944907A
patent/FR2027210A1/fr
not_active
Withdrawn
Also Published As
Publication number
Publication date
DE1964623A1
(en)
1970-07-16
DE1964623B2
(en)
1978-07-13
SE335884B
(en)
1971-06-14
DE1964623C3
(en)
1979-03-15
US3614490A
(en)
1971-10-19
FR2027210A1
(en)
1970-09-25
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Legal Events
Date
Code
Title
Description
1973-01-24
PS
Patent sealed [section 19, patents act 1949]
1981-07-30
PCNP
Patent ceased through non-payment of renewal fee
