GB961921A - Improvements in or relating to ultracentrifuges - Google Patents

Improvements in or relating to ultracentrifuges

Info

Publication number
GB961921A
GB961921A GB92363A GB92363A GB961921A GB 961921 A GB961921 A GB 961921A GB 92363 A GB92363 A GB 92363A GB 92363 A GB92363 A GB 92363A GB 961921 A GB961921 A GB 961921A
Authority
GB
United Kingdom
Prior art keywords
pick
frequency
centrifuge
rotor
speed
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
Application number
GB92363A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MARTIN CHRIST
Original Assignee
MARTIN CHRIST
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.)
Filing date
Publication date
Application filed by MARTIN CHRIST filed Critical MARTIN CHRIST
Publication of GB961921A publication Critical patent/GB961921A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B13/00—Control arrangements specially designed for centrifuges; Programme control of centrifuges
    • B04B13/003—Rotor identification systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/07—Indicating devices, e.g. for remote indication
    • G01P1/08—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers
    • G01P1/10—Arrangements of scales, pointers, lamps or acoustic indicators, e.g. in automobile speedometers for indicating predetermined speeds
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/041—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature additionally responsive to excess current
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/093—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against increase beyond, or decrease below, a predetermined level of rotational speed

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Centrifugal Separators (AREA)

Abstract

961,921. Centrifugal separators. M. CHRIST. Jan. 8, 1963 [Jan. 9, 1962], No. 923/63. Heading B2P. [Also in Division H2] The rotor of a high-speed centrifuge carries a sector ring 10, the current induced in pick-up device 12 having a frequency dependent upon the speed of the rotor. When the induced frequency becomes equal to the standard frequency from generator G, detector 15 produces a direct-current to energize relay 6 and stop the motor M which drives the centrifuge. The ring 10 may be constructed in the form of a gearwheel disposed on a disc of insulating material through which the rotor shaft of the centrifuge passes. The pick-up device may comprise a winding mounted on an iron core, Fig. 3 (not shown). In another arrangement, the coil of the pick-up device 12 is energized with directcurrent, the sector ring 10<SP>1</SP> providing a periodic variation in the reluctance of the magnetic circuit. The A.C. signal so developed is applied through transformer 38 to amplifier tube 43, the amplified voltage being fed to inductance 47 coupled to oscillatory circuit 48, 49, which is tuned to the critical frequency. The output of the tuned circuit is amplified in tube 50 and then applied through rectifier 55 and filter 56 to amplifier 58 feeding relay 59 which disconnects the motor if the speed becomes excessive.
GB92363A 1962-01-09 1963-01-08 Improvements in or relating to ultracentrifuges Expired GB961921A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1962C0025943 DE1233175B (en) 1962-01-09 1962-01-09 Ultracentrifuge with exchangeable rotor and a device that indicates a certain speed

Publications (1)

Publication Number Publication Date
GB961921A true GB961921A (en) 1964-06-24

Family

ID=7017999

Family Applications (1)

Application Number Title Priority Date Filing Date
GB92363A Expired GB961921A (en) 1962-01-09 1963-01-08 Improvements in or relating to ultracentrifuges

Country Status (2)

Country Link
DE (1) DE1233175B (en)
GB (1) GB961921A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0138383A2 (en) * 1983-09-17 1985-04-24 FISONS plc A centrifuge provided with a rotor identification system
EP0560391A2 (en) * 1992-03-13 1993-09-15 Maschinenfabrik Berthold Hermle Aktiengesellschaft Centrifuge

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1063532B (en) * 1958-02-28 1959-08-13 Phywe Ag Centrifuge, especially ultracentrifuge, with exchangeable rotor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0138383A2 (en) * 1983-09-17 1985-04-24 FISONS plc A centrifuge provided with a rotor identification system
EP0138383A3 (en) * 1983-09-17 1986-12-10 Fisons Plc A centrifuge provided with a rotor identification system
EP0560391A2 (en) * 1992-03-13 1993-09-15 Maschinenfabrik Berthold Hermle Aktiengesellschaft Centrifuge
EP0560391A3 (en) * 1992-03-13 1994-08-10 Hermle Berthold Maschf Ag Centrifuge

Also Published As

Publication number Publication date
DE1233175B (en) 1967-01-26

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