GB1457383A - Commutating rotary transformer - Google Patents

Commutating rotary transformer

Info

Publication number
GB1457383A
GB1457383A GB1119875A GB1119875A GB1457383A GB 1457383 A GB1457383 A GB 1457383A GB 1119875 A GB1119875 A GB 1119875A GB 1119875 A GB1119875 A GB 1119875A GB 1457383 A GB1457383 A GB 1457383A
Authority
GB
United Kingdom
Prior art keywords
windings
core segments
magnetic core
preamplifiers
march
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
GB1119875A
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.)
American Videonetics Corp
Original Assignee
American Videonetics 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.)
Filing date
Publication date
Application filed by American Videonetics Corp filed Critical American Videonetics Corp
Publication of GB1457383A publication Critical patent/GB1457383A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/18—Rotary transformers
    • 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
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/12—Masking of heads; circuits for Selecting or switching of heads between operative and inoperative functions or between different operative functions or for selection between operative heads; Masking of beams, e.g. of light beams
    • G11B15/14—Masking or switching periodically, e.g. of rotating heads
    • 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
    • G11B5/53—Disposition or mounting of heads on rotating support

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

1457383 Transverse scan tape recorder AMERICAN VIDEONETICS CORP 18 March 1975 [25 March 1974] 11198/75 Heading G5R [Also in Division H1] A commutating transformer for a recordplayback device comprises a first part 10 carrying radial magnetic core segments 21-28 with windings P1-P8 and a second part 11 carrying radial magnetic core segments 51, 52 with windings S1, S2, the part 10 being mounted on the rotating head assembly of a transverse scan recorder with heads H1-H8 scanning a tape T. Connections between the windings P1-P8 and the heads H1-H8 are by leads passing through openings 36 in an aluminium base 16 and by conductive foil (not shown) and connector pins 38 on a printed circuit board 37, the pins 38 being plugged into sockets (not shown) on the head assembly, while connections from the windings S1 S2 to preamplifiers (61, 62, Fig. 4, not shown) are by leads passing through openings 54 in an aluminium base 41 and conductive foil on a printed circuit board 56. The core segments 21-28 are arranged in two groups, an inner group 22, 24, 26, 28 and an outer group 21, 23, 25,27, separatedbyairgaps31,32.Duringthe recording process the signal is fed in parallel to the windings S1, S2, but during playback the outputs of the preamplifiers (61, 62) are successively applied to playback circuitry (64) by a switcher unit (63). In a video system each scan of the head may correspond to 10-20 horizontal lines of the display, switching occurring just before the horizontal synch pulse. The magnetic core segments are of a ferrite such as Ferroxcube 4C4, and each winding may consist of 7 turns of #47 copper wire for a frequency range 0À5- 6À5 MHz.
GB1119875A 1974-03-25 1975-03-18 Commutating rotary transformer Expired GB1457383A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US454257A US3911486A (en) 1974-03-25 1974-03-25 Commutating rotary transformer

Publications (1)

Publication Number Publication Date
GB1457383A true GB1457383A (en) 1976-12-01

Family

ID=23803934

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1119875A Expired GB1457383A (en) 1974-03-25 1975-03-18 Commutating rotary transformer

Country Status (7)

Country Link
US (1) US3911486A (en)
JP (1) JPS50134413A (en)
CA (1) CA1032621A (en)
DE (1) DE2512388C2 (en)
FR (1) FR2266272B1 (en)
GB (1) GB1457383A (en)
NL (1) NL7503483A (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH584494A5 (en) * 1974-10-17 1977-01-31 Grundig Emv
US4139871A (en) * 1975-11-24 1979-02-13 Nippon Hoso Kyokai Eight-head magnetic video tape recording and reproducing apparatus with rotary transformer
US4099210A (en) * 1976-10-04 1978-07-04 Dolby Dale P Rotating transducing head assembly
JPS6112572Y2 (en) * 1979-03-14 1986-04-19
JPS62109304A (en) * 1985-11-08 1987-05-20 Canon Electronics Inc Rotary transformer
JPS6423401A (en) * 1987-07-20 1989-01-26 Victor Company Of Japan Magnetic recording and reproducing device
DE3724349A1 (en) * 1987-07-23 1989-02-02 Thomson Brandt Gmbh Rotary transformer for a recorder
US5126906A (en) * 1989-04-17 1992-06-30 Hitachi, Ltd. Rotary magnetic head device with rotary transformer having high coupling coefficient
US5434720A (en) * 1989-05-23 1995-07-18 Kabushiki Kaisha Toshiba Magnetic recording and reproduction apparatus with plural heads
US5276565A (en) * 1989-05-23 1994-01-04 Kabushiki Kaisha Toshiba Rotary type magnetic recording and reproduction apparatus
KR910008940Y1 (en) * 1989-07-15 1991-11-15 다나신 덴기 가부시끼가이샤 Operating mode selection device of tape recorder
JPH04319501A (en) * 1991-04-19 1992-11-10 Hitachi Ltd Rotary magnetic head device and rotary transformer used therein
US5455729A (en) * 1993-08-30 1995-10-03 Conner Peripherals, Inc. Multi-channel rotating transformer
GB0900493D0 (en) * 2009-01-14 2009-02-11 Rolls Royce Plc Rotary transformer

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3361878A (en) * 1964-03-11 1968-01-02 Ampex Signal switching system utilizing magnetic switching for rotating head recorders
CA923207A (en) * 1971-01-04 1973-03-20 R. Gooch Beverley Interchannel shield for multichannel rotary transformer

Also Published As

Publication number Publication date
FR2266272B1 (en) 1978-11-03
DE2512388C2 (en) 1983-12-01
JPS50134413A (en) 1975-10-24
US3911486A (en) 1975-10-07
DE2512388A1 (en) 1975-10-02
CA1032621A (en) 1978-06-06
NL7503483A (en) 1975-09-29
FR2266272A1 (en) 1975-10-24

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee