GB1237492A – Linear electric positioning device
– Google Patents
GB1237492A – Linear electric positioning device
– Google Patents
Linear electric positioning device
Info
Publication number
GB1237492A
GB1237492A
GB24814/69A
GB2481469A
GB1237492A
GB 1237492 A
GB1237492 A
GB 1237492A
GB 24814/69 A
GB24814/69 A
GB 24814/69A
GB 2481469 A
GB2481469 A
GB 2481469A
GB 1237492 A
GB1237492 A
GB 1237492A
Authority
GB
United Kingdom
Prior art keywords
polepiece
coils
permanent magnets
movable
field system
Prior art date
1968-06-17
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
GB24814/69A
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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.)
1968-06-17
Filing date
1969-05-15
Publication date
1971-06-30
1969-05-15
Application filed by International Business Machines Corp
filed
Critical
International Business Machines Corp
1971-06-30
Publication of GB1237492A
publication
Critical
patent/GB1237492A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
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
G01P3/50—Devices characterised by the use of electric or magnetic means for measuring linear speed
G01P3/505—Devices characterised by the use of electric or magnetic means for measuring linear speed by using eddy currents
H—ELECTRICITY
H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02K—DYNAMO-ELECTRIC MACHINES
H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
H02K41/02—Linear motors; Sectional motors
H02K41/035—DC motors; Unipolar motors
H02K41/0352—Unipolar motors
H02K41/0354—Lorentz force motors, e.g. voice coil motors
H02K41/0356—Lorentz force motors, e.g. voice coil motors moving along a straight path
Abstract
1,237,492. Measuring velocity electrically. INTERNATIONAL BUSINESS MACHINES CORP. May 15, 1969 [June 17, 1968], No.24814/69. Heading G1N. [Also in Divisions G5, H2] In a linear positioning device, particularly for positioning transducers in a magnetic storage device, comprising a fixed field system 29 … 32 and a linearly-movable member 36 carrying a drive coil 35, the member 36 carries permanent magnets 67, 68, Fig. 2, movable within seriesconnected sensing coils 63, 66 which together form a velocity detector. As shown, the field system comprises an open frame, the sides 29, 30 of which are permanent magnets and the side 31 has a polepiece 27 extending into an aperture in polepiece 32 so as to define an annular air-gap. The member 36 surrounds polepiece 27 and moves through the annular air-gap. The sensing coils are housed in bores 60, 61 in polepiece 27 and the permanent magnets 67, 68 form part of rods 69, 70 movable with the member 36, opposite poles of the magnets being arranged adjacent each other. This arrangement together with the series connection of the coils as in Fig. 3 (not shown) ensures that induction affects of the drive coil and eddy currents in the field system in the coils are substantially cancelled. The member 36 is formed integral with a carriage 13 guided for movement along a rail 19 and carrying arms 12 which support transducers 11 co-operating with storage discs 10. Current is supplied to the coil 35 through a control device 53 which reverses the driving current as the member 36 approaches a selected position thereby providing a decelerating force, the point at which such current reversal occurs being determined by the magnitude of the signal from the velocity detector.
GB24814/69A
1968-06-17
1969-05-15
Linear electric positioning device
Expired
GB1237492A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US73743868A
1968-06-17
1968-06-17
Publications (1)
Publication Number
Publication Date
GB1237492A
true
GB1237492A
(en)
1971-06-30
Family
ID=24963927
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB24814/69A
Expired
GB1237492A
(en)
1968-06-17
1969-05-15
Linear electric positioning device
Country Status (5)
Country
Link
US
(1)
US3470399A
(en)
JP
(1)
JPS4923224B1
(en)
DE
(1)
DE1930573A1
(en)
FR
(1)
FR2011040A1
(en)
GB
(1)
GB1237492A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2145269A
(en)
*
1983-06-30
1985-03-20
Tokico Ltd
Magnetic disc memory apparatus
Families Citing this family (18)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3577023A
(en)
*
1969-12-04
1971-05-04
Advanced Peripherals Inc
Moving coil actuator
US3610973A
(en)
*
1970-01-08
1971-10-05
Westinghouse Electric Corp
Vibration pickup device
US3654540A
(en)
*
1971-01-15
1972-04-04
Cavitron Corp
Magnetostrictive drive circuit feedback coil
US3721967A
(en)
*
1971-08-02
1973-03-20
Ibm
Head carriage assembly for magnetic disk storage drive
FR2135998A5
(en)
*
1972-03-08
1972-12-22
Commissariat Energie Atomique
US3816776A
(en)
*
1972-12-04
1974-06-11
Control Data Corp
External magnetic field compensator
US4034411A
(en)
*
1975-07-11
1977-07-05
International Business Machines Corporation
Magnetic disk information storage apparatus
US4394594A
(en)
*
1975-07-24
1983-07-19
Papst-Motoren Kg
Motor with a disk rotor
US4016441A
(en)
*
1976-05-19
1977-04-05
The Singer Company
Linear motor
JPS5452315U
(en)
*
1977-09-17
1979-04-11
DE7900695U1
(en)
*
1979-01-12
1979-07-12
Basf Ag, 6700 Ludwigshafen
DEVICE FOR POSITIONING SCANNING HEADS IN DISK MEMORIES
JPS56500437A
(en)
*
1979-02-28
1981-04-02
US4260914A
(en)
*
1979-03-28
1981-04-07
Digital Equipment Corporation
Differential linear velocity transducer
DE3121502C2
(en)
*
1980-05-31
1985-06-05
Universal Pioneer Corp., Tokio/Tokyo
Arrangement for guiding a scanner carriage
DE3129212A1
(en)
*
1981-07-24
1983-02-10
Basf Ag, 6700 Ludwigshafen
DEVICE FOR POSITIONING LOW-SIZE ITEMS
DE3334750C2
(en)
*
1983-09-26
1986-12-18
Kernforschungsanlage Jülich GmbH, 5170 Jülich
Coil system for inductive scanning of the speed of movement of a magnetized body
US4652779A
(en)
*
1984-10-30
1987-03-24
Magnetic Peripherals Inc.
Center pole for rotary actuator coil with lowered inductance
EP0734569A1
(en)
*
1993-12-15
1996-10-02
Seagate Technology, Inc.
Voice coil driven positioner for coarse and fine positioning of magnetic head in multi-track tape drive
Family Cites Families (4)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2296754A
(en)
*
1939-04-29
1942-09-22
Texas Co
Astatic electromagnetic vibration detector
US2289962A
(en)
*
1939-05-06
1942-07-14
Gen Electric
Vibration device
NL299868A
(en)
*
1960-01-04
US3260870A
(en)
*
1962-12-28
1966-07-12
Ibm
Magnetic detent mechanism
1968
1968-06-17
US
US737438A
patent/US3470399A/en
not_active
Expired – Lifetime
1969
1969-04-29
FR
FR6912343A
patent/FR2011040A1/fr
not_active
Withdrawn
1969-05-15
GB
GB24814/69A
patent/GB1237492A/en
not_active
Expired
1969-05-30
JP
JP44041751A
patent/JPS4923224B1/ja
active
Pending
1969-06-16
DE
DE19691930573
patent/DE1930573A1/en
active
Pending
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2145269A
(en)
*
1983-06-30
1985-03-20
Tokico Ltd
Magnetic disc memory apparatus
Also Published As
Publication number
Publication date
JPS4923224B1
(en)
1974-06-14
FR2011040A1
(en)
1970-02-27
US3470399A
(en)
1969-09-30
DE1930573A1
(en)
1970-04-02
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