GB1292727A – Positioning device
– Google Patents
GB1292727A – Positioning device
– Google Patents
Positioning device
Info
Publication number
GB1292727A
GB1292727A
GB5129570A
GB5129570A
GB1292727A
GB 1292727 A
GB1292727 A
GB 1292727A
GB 5129570 A
GB5129570 A
GB 5129570A
GB 5129570 A
GB5129570 A
GB 5129570A
GB 1292727 A
GB1292727 A
GB 1292727A
Authority
GB
United Kingdom
Prior art keywords
heads
summed
distance
fine positioning
point
Prior art date
1969-12-15
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
GB5129570A
Inventor
Willi Jilke
Geoffrey Philip Gates
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.)
California Computer Products Inc
Original Assignee
California Computer Products Inc
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.)
1969-12-15
Filing date
1970-10-28
Publication date
1972-10-11
1970-10-28
Application filed by California Computer Products Inc
filed
Critical
California Computer Products Inc
1972-10-11
Publication of GB1292727A
publication
Critical
patent/GB1292727A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
G—PHYSICS
G05—CONTROLLING; REGULATING
G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
G05D3/00—Control of position or direction
G05D3/12—Control of position or direction using feedback
G05D3/14—Control of position or direction using feedback using an analogue comparing device
G05D3/1436—Control of position or direction using feedback using an analogue comparing device with fine or coarse devices
G—PHYSICS
G05—CONTROLLING; REGULATING
G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
G05D3/00—Control of position or direction
G05D3/12—Control of position or direction using feedback
G05D3/14—Control of position or direction using feedback using an analogue comparing device
G05D3/1418—Control of position or direction using feedback using an analogue comparing device with ac amplifier chain
G—PHYSICS
G05—CONTROLLING; REGULATING
G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
G05D3/00—Control of position or direction
G05D3/12—Control of position or direction using feedback
G05D3/20—Control of position or direction using feedback using a digital comparing device
G—PHYSICS
G11—INFORMATION STORAGE
G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
G11B5/59633—Servo formatting
Abstract
1292727 Measuring Displacement CALIFORNIA COMPUTER PRODUCTS Inc 28 Oct 1970 [15 Dec 1969] 51295/70 Heading G1N [Also in Division G4] A coarse/fine positioning system of the type comprising a magnetically permeable toothed rack 2 and a sensing head having 2 ‘e’-shaped cores spaced apart a distance of 1¢ times the rack pitch and having a primary and secondary thereon, the outputs of the secondaries being summed in opposition, has a level detector and counter to monitor the distance moved by the heads in response to digital signals (see Division G4), and comprises a fine positioning mechanism adapted to detect the phase of the summed secondary signals and to move the heads to an adjacent null-point. A switch 55 is enabled to combine a square wave derived from an oscillator 52 also activating the primaries of the heads with the summed secondary signals at 51 and to pass this combined waveform to an integrator 57 to apply to the motor unit 60 a voltage of magnitude indicative of the distance, from a null-point and polarity of the direction of travel exclusive switches A,B are controlled at 80 to prevent motor 60 moving in a wrong direction in the event of overshoot.
GB5129570A
1969-12-15
1970-10-28
Positioning device
Expired
GB1292727A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US88488569A
1969-12-15
1969-12-15
Publications (1)
Publication Number
Publication Date
GB1292727A
true
GB1292727A
(en)
1972-10-11
Family
ID=25385635
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5129570A
Expired
GB1292727A
(en)
1969-12-15
1970-10-28
Positioning device
Country Status (5)
Country
Link
CA
(1)
CA919285A
(en)
DE
(1)
DE2061721A1
(en)
FR
(1)
FR2072813A5
(en)
GB
(1)
GB1292727A
(en)
SE
(1)
SE360487B
(en)
1970
1970-10-28
GB
GB5129570A
patent/GB1292727A/en
not_active
Expired
1970-11-30
CA
CA099487A
patent/CA919285A/en
not_active
Expired
1970-12-02
FR
FR7043404A
patent/FR2072813A5/fr
not_active
Expired
1970-12-03
SE
SE1639470A
patent/SE360487B/xx
unknown
1970-12-15
DE
DE19702061721
patent/DE2061721A1/en
active
Pending
Also Published As
Publication number
Publication date
FR2072813A5
(en)
1971-09-24
SE360487B
(en)
1973-09-24
CA919285A
(en)
1973-01-16
DE2061721A1
(en)
1971-06-24
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Legal Events
Date
Code
Title
Description
1973-02-21
PS
Patent sealed
1982-06-03
PCNP
Patent ceased through non-payment of renewal fee
