GB1301301A – – Google Patents
GB1301301A – – Google Patents
Info
Publication number
GB1301301A
GB1301301A
GB85069A
GB1301301DA
GB1301301A
GB 1301301 A
GB1301301 A
GB 1301301A
GB 85069 A
GB85069 A
GB 85069A
GB 1301301D A
GB1301301D A
GB 1301301DA
GB 1301301 A
GB1301301 A
GB 1301301A
Authority
GB
United Kingdom
Prior art keywords
frequency
basket
arrangement
hence
shaft
Prior art date
1969-01-07
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
GB85069A
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.)
1969-01-07
Filing date
1969-01-07
Publication date
1972-12-29
1969-01-07
Application filed
filed
Critical
1972-12-29
Publication of GB1301301A
publication
Critical
patent/GB1301301A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
230000001419
dependent effect
Effects
0.000
abstract
5
239000003990
capacitor
Substances
0.000
abstract
4
230000010355
oscillation
Effects
0.000
abstract
2
230000000694
effects
Effects
0.000
abstract
1
230000005284
excitation
Effects
0.000
abstract
1
230000003760
hair shine
Effects
0.000
abstract
1
230000001939
inductive effect
Effects
0.000
abstract
1
239000000463
material
Substances
0.000
abstract
1
230000003534
oscillatory effect
Effects
0.000
abstract
1
239000002002
slurry
Substances
0.000
abstract
1
239000007787
solid
Substances
0.000
abstract
1
230000001360
synchronised effect
Effects
0.000
abstract
1
Classifications
H—ELECTRICITY
H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
H02P9/42—Arrangements for controlling electric generators for the purpose of obtaining a desired output to obtain desired frequency without varying speed of the generator
B—PERFORMING OPERATIONS; TRANSPORTING
B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
B04B—CENTRIFUGES
B04B9/00—Drives specially designed for centrifuges; Arrangement or disposition of transmission gearing; Suspending or balancing rotary bowls
B04B9/14—Balancing rotary bowls ; Schrappers
B04B9/146—Unbalance detection devices
Abstract
1301301 Controlling a vibratory body; electrooptical path THOMAS BROADBENT & SONS LTD 6 Jan 1970 [7 Jan 1969] 850/69 Headings G1A, G1N [Also in Divisions B1, G3, H2] An arrangement for maintaining constant the magnitude of vibrations of a vibratory body of non-constant inertia operating at or near resonance comprises a sweep frequency oscillator whose output determines the frequency of vibration of the body and which is controlled so that as the inertia of the body and hence the frequency for resonance varies the sweep frequency range varies so as to be centred on that frequency. The term «vibratory body» includes within its scope a body rotating at constant angular velocity and having an oscillatory motion about the same axis imposed thereon. As shown a centrifuge basket 4 is carried on a shaft 1 and rotated by a motor 5 at a rotational speed of about 200 r.p.m., and a rotor/stator, arrangement is provided such that the stator provides a rotating field which, if it is not synchronous with the shaft, causes an alternating torque which produces a sinusoidal vibration superimposed on the rotation of the shaft. The assembly of basket rotor and shaft, all of known inertias, constitute an arrangement having a resonant frequency, and if the imposed frequency matches this resonant frequency maximum amplitude of oscillation of the basket will occur. During movement of the basket solid matter from a slurry fed to the basket is discharged at the open end, and hence the discharge rate is dependent on the amplitude of vibration. Since material is being continually fed to and discharged from the basket the mass and hence the inertia of this varies, and to maintain maximum amplitude of vibration the imposed vibrational frequency must be varied to maintain resonance. To effect the necessary control, a sensor 12, whose output depends upon the amplitude of oscillation, feeds, through an amplifier-rectifieramplifier arrangement, one side of a differential amplifier 24 whose other side is fed from a preset potentiometer 25 so that at maximum output from sensor 12 the two inputs are equal and little or no current flows through a lamp 26. The lamp 12 shines on a photo-cell 27 the left hand side of which is periodically switched every ¢ second between +ve and -ve supply lines by means of circuits 28, 29, 30, 31 and the right hand side of which is connected to capacitor 32, which is charged first in one sense and then in the other every second to a voltage dependent on the photo-cell resistance, and this voltage controls the output frequency of a uni-junction transistor oscillator 38,39,40. This frequency in turn controls the exciting frequency of the stator 11. Hence once per second the oscillator sweeps a frequency band dependent on the voltage excursion at the capacitor 32. During this sweep the resonant condition will be passed through, resulting in a dim light, and a period during which cell 27 has a high resistance, so that the next capacitor voltage excursion and hence frequency sweep is reduced. Eventually only a small frequency sweep around the resonant frequency obtains. The arrangement may be modified by maintaining a constant stator excitation frequency and controlling an electromagnetic brake on the shaft. The capacitor may be replaced by an inductive arrangement, and the photo-cell may be replaced by a thermistor, voltage dependent element, field dependent element or the like.
GB85069A
1969-01-07
1969-01-07
Expired
GB1301301A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB85069
1969-01-07
Publications (1)
Publication Number
Publication Date
GB1301301A
true
GB1301301A
(en)
1972-12-29
Family
ID=9711562
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB85069A
Expired
GB1301301A
(en)
1969-01-07
1969-01-07
Country Status (5)
Country
Link
US
(1)
US3636468A
(en)
CH
(1)
CH496479A
(en)
DE
(1)
DE2000332A1
(en)
GB
(1)
GB1301301A
(en)
NL
(1)
NL7000141A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN110890866A
(en)
*
2019-12-23
2020-03-17
中国电子科技集团公司第二十九研究所
Satellite-borne solid-state power amplifier micro-discharge resisting method and matching circuit
Families Citing this family (6)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE3241624C2
(en)
*
1982-11-11
1986-06-26
Deutsche Gesellschaft für Wiederaufarbeitung von Kernbrennstoffen mbH, 3000 Hannover
Measuring method and measuring device for determining the solids loading of the drum of a centrifuge
US4832853A
(en)
*
1985-06-20
1989-05-23
Kitagawa Iron Works Co., Ltd.
Apparatus for improving characteristics of sand
JPH0651587B2
(en)
*
1985-06-20
1994-07-06
株式会社北川鉄工所
Method and apparatus for improving properties of sand
DE19631384C1
(en)
*
1996-08-02
1997-10-16
Clouth Gummiwerke Ag
Electric machine with rotor in drive train e.g. of motor vehicle
US7534358B2
(en)
*
2006-03-20
2009-05-19
Elgin National Industries, Inc.
Horizontal vibratory centrifuge apparatus
CN107538301A
(en)
*
2017-09-01
2018-01-05
深圳市华星光电技术有限公司
Panel edger unit and its dynamic balancing method for measurement
1969
1969-01-07
GB
GB85069A
patent/GB1301301A/en
not_active
Expired
1969-12-31
US
US889389A
patent/US3636468A/en
not_active
Expired – Lifetime
1970
1970-01-05
DE
DE19702000332
patent/DE2000332A1/en
active
Pending
1970-01-06
CH
CH5370A
patent/CH496479A/en
not_active
IP Right Cessation
1970-01-07
NL
NL7000141A
patent/NL7000141A/xx
unknown
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN110890866A
(en)
*
2019-12-23
2020-03-17
中国电子科技集团公司第二十九研究所
Satellite-borne solid-state power amplifier micro-discharge resisting method and matching circuit
CN110890866B
(en)
*
2019-12-23
2023-10-27
中国电子科技集团公司第二十九研究所
Anti-micro discharge method and matching circuit for satellite-borne solid-state power amplifier
Also Published As
Publication number
Publication date
DE2000332A1
(en)
1970-11-19
NL7000141A
(en)
1970-07-09
US3636468A
(en)
1972-01-18
CH496479A
(en)
1970-09-30
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Legal Events
Date
Code
Title
Description
1973-05-09
PS
Patent sealed [section 19, patents act 1949]
1975-07-30
PLNP
Patent lapsed through nonpayment of renewal fees
