GB1525622A – Head drum assemblies
– Google Patents
GB1525622A – Head drum assemblies
– Google Patents
Head drum assemblies
Info
Publication number
GB1525622A
GB1525622A
GB32670/75A
GB3267075A
GB1525622A
GB 1525622 A
GB1525622 A
GB 1525622A
GB 32670/75 A
GB32670/75 A
GB 32670/75A
GB 3267075 A
GB3267075 A
GB 3267075A
GB 1525622 A
GB1525622 A
GB 1525622A
Authority
GB
United Kingdom
Prior art keywords
transformer
tape
heads
drum
aug
Prior art date
1974-08-27
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
GB32670/75A
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.)
Sony Corp
Original Assignee
Sony 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.)
1974-08-27
Filing date
1975-08-05
Publication date
1978-09-20
1975-08-05
Application filed by Sony Corp
filed
Critical
Sony Corp
1978-09-20
Publication of GB1525622A
publication
Critical
patent/GB1525622A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
230000000712
assembly
Effects
0.000
title
1
238000000429
assembly
Methods
0.000
title
1
239000011248
coating agent
Substances
0.000
abstract
1
238000000576
coating method
Methods
0.000
abstract
1
239000000463
material
Substances
0.000
abstract
1
239000002184
metal
Substances
0.000
abstract
1
229910052751
metal
Inorganic materials
0.000
abstract
1
239000003973
paint
Substances
0.000
abstract
1
229910000889
permalloy
Inorganic materials
0.000
abstract
1
230000035699
permeability
Effects
0.000
abstract
1
Classifications
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
G11B5/52—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 simultaneous movement of head and record carrier, e.g. rotation of head
G—PHYSICS
G11—INFORMATION STORAGE
G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
G11B15/60—Guiding record carrier
G11B15/61—Guiding record carrier on drum, e.g. drum containing rotating heads
G—PHYSICS
G11—INFORMATION STORAGE
G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information
H—ELECTRICITY
H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
H02K—DYNAMO-ELECTRIC MACHINES
H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
H02K11/01—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for shielding from electromagnetic fields, i.e. structural association with shields
H02K11/014—Shields associated with stationary parts, e.g. stator cores
H02K11/0141—Shields associated with casings, enclosures or brackets
Abstract
1525622 Rotary head recorder SONY CORP 5 Aug 1975 [27 Aug 1974] 32670/75 Heading G5R In rotary head, video tape recorder in which the tape is guided by a fixed drum 12 and a rotating drum 11 which also carried heads 36 operating in the gap between the drums and in which the signals are fed to or received from the heads via a rotary transformer 43, the pick up by the transformer, the signals leads 38, 41 and the tape of electrostatic or electromagnetic noise generated in the commutator 56 of the D.C. motor 13 driving the drum 11 and heads 36 is reduced by the provision of members 43, 50, 62, 70 which screen the transformer, the motor and the tape. The screens may be a layer of high magnetic permeability material, e.g. permalloy with a coating of a good conductivity metal, e.g. copper or the screen around the transformer can be a layer of conducting paint.
GB32670/75A
1974-08-27
1975-08-05
Head drum assemblies
Expired
GB1525622A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
JP49098105A
JPS5125108A
(en)
1974-08-27
1974-08-27
Publications (1)
Publication Number
Publication Date
GB1525622A
true
GB1525622A
(en)
1978-09-20
Family
ID=14211035
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB32670/75A
Expired
GB1525622A
(en)
1974-08-27
1975-08-05
Head drum assemblies
Country Status (7)
Country
Link
US
(1)
US4031558A
(en)
JP
(1)
JPS5125108A
(en)
CA
(1)
CA1066405A
(en)
DE
(1)
DE2535531C2
(en)
FR
(1)
FR2283508A1
(en)
GB
(1)
GB1525622A
(en)
NL
(1)
NL7510146A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2306755A
(en)
*
1995-10-31
1997-05-07
Daewoo Electronics Co Ltd
Rotary head drum for a VCR
Families Citing this family (40)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4099210A
(en)
*
1976-10-04
1978-07-04
Dolby Dale P
Rotating transducing head assembly
JPS5833613B2
(en)
*
1977-11-09
1983-07-21
コンスタンチン、アンドレ−エウイツチ、ラブレンチエフ
Rotating magnetic head assembly
US4129892A
(en)
*
1977-12-19
1978-12-12
Burroughs Corporation
Back-up pressure mechanism with tensioned elongated member
SU888184A1
(en)
*
1977-12-28
1981-12-07
Предприятие П/Я Р-6707
Device for reproducing from magnetic tape
JPS54102445A
(en)
*
1978-01-27
1979-08-11
Matsushita Electric Ind Co Ltd
Fluid bearing revolving apparatus
JPS5554718A
(en)
*
1978-10-16
1980-04-22
Matsushita Electric Ind Co Ltd
Rotary transmission device
DE2852167C2
(en)
*
1978-12-02
1986-10-02
Robert Bosch Gmbh, 7000 Stuttgart
Scanning device in a magnetic tape recorder for recording and / or reproducing broadband signals
NL7905278A
(en)
*
1979-07-06
1981-01-08
Philips Nv
APPARATUS FOR RECORDING AND READING SIGNALS IN TRACKS ON A MAGNETIC TAPE.
JPS6027095B2
(en)
*
1979-07-18
1985-06-27
松下電器産業株式会社
rotating head assembly
US4400751A
(en)
*
1980-03-06
1983-08-23
Hitachi Denshi Kabushiki Kaisha
Video head drum for video tape recorders
US4658312A
(en)
*
1981-09-07
1987-04-14
Papst-Motoren Gmbh & Co. K.G.
Disk storage drive
USRE38673E1
(en)
1980-05-10
2004-12-21
Papst Licensing Gmbh & Co. Kg
Disk storage device having a hub sealing member feature
USRE38601E1
(en)
1980-05-10
2004-09-28
Papst Licensing, GmbH & Co. KG
Disk storage device having a radial magnetic yoke feature
USRE37058E1
(en)
1980-05-10
2001-02-20
Papst Licensing Gmbh & Co. Kg
Disk storage device having contamination seals
USRE38662E1
(en)
1980-05-10
2004-11-30
Papst Licensing Gmbh & Co. Kg
Disk storage device having a sealed bearing tube
DE3144629A1
(en)
*
1980-12-05
1982-07-08
Papst Motoren Gmbh & Co Kg
DRIVING DEVICE FOR MAGNETIC HARD DISK STORAGE
USRE38772E1
(en)
1981-03-18
2005-08-09
Papst Licensing Gmbh & Co. Kg
Disk storage device having an undercut hub member
USRE35792E
(en)
*
1981-09-07
1998-05-12
Papst Licensing, Gmbh
Disk storage drive
JPS58109828U
(en)
*
1982-01-20
1983-07-26
松下電器産業株式会社
drum device
JPS58179619U
(en)
*
1982-05-25
1983-12-01
日本ビクター株式会社
Drum structure of magnetic recording/reproducing device
JPS5963024A
(en)
*
1982-09-30
1984-04-10
Matsushita Electric Ind Co Ltd
Fluid bearing cylinder device
JPS5982314U
(en)
*
1982-11-25
1984-06-04
日本ビクター株式会社
rotary transformer device
DE3319878C1
(en)
*
1983-06-01
1985-01-03
Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig & Co KG, 8510 Fürth
Arrangement of a rotary transformer in a video device
AT379911B
(en)
*
1984-04-30
1986-03-10
Philips Nv
DRUM-SHAPED SCAN UNIT FOR A RECORDING AND / OR REPRODUCTION DEVICE AND METHOD FOR ARRANGING A TRANSFORMER DISC OF A TWO-PART RING TRANSFORMER ON A DRUM DISC OF A DRUM-SCREEN UNIT
AT382976B
(en)
*
1985-07-15
1987-05-11
Philips Nv
RECORDING AND / OR PLAYING DEVICE
US4748528A
(en)
*
1986-01-30
1988-05-31
Eastman Kodak Company
Apparatus having a magnetic turnaround roller to reduce magnetostrictive knockdown
JPS637308U
(en)
*
1986-06-30
1988-01-19
JP2574771B2
(en)
*
1986-09-03
1997-01-22
株式会社日立製作所
Rotating magnetic head device
DE3705928A1
(en)
*
1987-02-25
1988-09-08
Broadcast Television Syst
MAGNETIC TAPE DEVICE WITH DEVICE FOR THE CONTACTLESS TRANSFER OF SIGNALS BETWEEN RELATIVELY MOVING COMPONENTS
JPH0658731B2
(en)
*
1990-06-07
1994-08-03
日本ビクター株式会社
Connector member for rotating magnetic head
US5325248A
(en)
*
1991-01-08
1994-06-28
Sharp Kabushiki Kaisha
Rotary head assembly
JPH06180801A
(en)
*
1992-12-11
1994-06-28
Teac Corp
Tape recorder having rotary head drum
US5764442A
(en)
*
1993-08-17
1998-06-09
Kabushiki Kaisha Sankyo Seiko Seisakusho
Rotary head drum with shielding of heads and rotary transformers
KR950006824A
(en)
*
1993-08-24
1995-03-21
배순훈
Optical disk device
KR0170118B1
(en)
*
1995-12-29
1999-04-15
배순훈
Head drum of tape recorder
JP4042263B2
(en)
*
1999-07-06
2008-02-06
ミツミ電機株式会社
Rotation balance adjustment mechanism of rotary head drum device
EP1411524A1
(en)
*
2002-10-16
2004-04-21
Samsung Electronics Co., Ltd.
Head drum assembly
KR20050119730A
(en)
*
2004-06-17
2005-12-22
삼성전자주식회사
Head-drum assembly for magnetic recording/reproducing apparatus
CN104079133A
(en)
*
2013-03-25
2014-10-01
德昌电机(深圳)有限公司
Direct current motor
JP6334471B2
(en)
*
2015-07-24
2018-05-30
ミネベアミツミ株式会社
Motor with rotary transformer
Family Cites Families (7)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
NL273413A
(en)
*
1961-02-06
NL299624A
(en)
*
1962-10-24
JPS4222045Y1
(en)
*
1964-10-30
1967-12-16
DE1762017C3
(en)
*
1968-03-22
1975-07-03
Telefunken Patentverwertungsgesellschaft Mbh, 7900 Ulm
Transformer with a fixed and a rotating core part
US3516146A
(en)
*
1968-06-19
1970-06-23
Westel Co
Method of assembling a helical scanning assembly
DE1933295C3
(en)
*
1968-07-03
1980-08-14
Akai Electric Co. Ltd., Tokio
Tape guide arrangement for a video magnetic tape recorder
US3890641A
(en)
*
1972-09-01
1975-06-17
Int Video Corp
Helical scan magnetic tape transport system including vacuum column tension control and helical scanner air bearing
1974
1974-08-27
JP
JP49098105A
patent/JPS5125108A/ja
active
Pending
1975
1975-08-01
CA
CA232,757A
patent/CA1066405A/en
not_active
Expired
1975-08-05
GB
GB32670/75A
patent/GB1525622A/en
not_active
Expired
1975-08-08
DE
DE2535531A
patent/DE2535531C2/en
not_active
Expired
1975-08-11
FR
FR7524991A
patent/FR2283508A1/en
active
Granted
1975-08-11
US
US05/603,538
patent/US4031558A/en
not_active
Expired – Lifetime
1975-08-27
NL
NL7510146A
patent/NL7510146A/en
not_active
Application Discontinuation
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2306755A
(en)
*
1995-10-31
1997-05-07
Daewoo Electronics Co Ltd
Rotary head drum for a VCR
US5781382A
(en)
*
1995-10-31
1998-07-14
Daewoo Electronics Co., Ltd.
Rotary head drum for a VCR having an improved connection structure between a VCR head and a rotary transformer
GB2306755B
(en)
*
1995-10-31
1999-07-21
Daewoo Electronics Co Ltd
Rotary head drum for a VCR
Also Published As
Publication number
Publication date
DE2535531C2
(en)
1984-08-30
FR2283508B1
(en)
1981-09-25
US4031558A
(en)
1977-06-21
FR2283508A1
(en)
1976-03-26
CA1066405A
(en)
1979-11-13
JPS5125108A
(en)
1976-03-01
DE2535531A1
(en)
1976-03-18
NL7510146A
(en)
1976-03-02
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Legal Events
Date
Code
Title
Description
1979-02-07
PS
Patent sealed [section 19, patents act 1949]
1995-04-05
PCNP
Patent ceased through non-payment of renewal fee
Effective date:
19940805
