US2844761A - High voltage transformer - Google Patents

High voltage transformer Download PDF

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Publication number
US2844761A
US2844761A US536527A US53652755A US2844761A US 2844761 A US2844761 A US 2844761A US 536527 A US536527 A US 536527A US 53652755 A US53652755 A US 53652755A US 2844761 A US2844761 A US 2844761A
Authority
US
United States
Prior art keywords
tube
high voltage
winding
holder
core
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 - Lifetime
Application number
US536527A
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English (en)
Inventor
Nieswaag Johannes
Smits Hubertus Jan
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips 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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US2844761A publication Critical patent/US2844761A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01F38/42—Flyback transformers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/10—Single-phase transformers

Definitions

  • the invention relates to a high-voltage transformer especially useful in television receivers.
  • a transformer comprising a holder for a rectifying tube, the cathode of which tube is heated by current supplied from a filament current winding which consists of at least one turn supported from the core of the transformer (cf., for example, French Patent No. 1,021, 348).
  • this difiiculty is avoided by a construction in which the tube is arranged in a tube holder or support which has a raised insulating rim on closing the adjacent end of the rectifying tube mounted in that holder.
  • the side of the holder remote from said rim is provided with a lateral extension and a raised insulating edge, which edge together with a second raised edge situated within the first-mentioned edge forms a preferably continuous channel in which at least the greater part of the filament current winding is arranged and which surrounds an aperture of passage for the core. Further all the bare metal parts of the connecting terminals of the tube holder and of the filament current winding connected thereto and of any other wires are embedded in insulating material provided in the said channel.
  • Fig. 2 is a bottom view of the tube holder.
  • Fig. 1 shows a high voltage transformer which may form part of a device for generating the line deflection current and the high voltage for the picture tube in a television set.
  • the transformer comprises a ferromagnetic core 1 on which a primary winding 3, a disc-shaped high voltage secondary winding 5 and another secondary, filament current winding 7 are provided.
  • the primary 3 may be connected in a suitable electronic circuit arrangement. Across the winding 5 pulses of a very high voltage, for example of 20 kv., are set up, which are rectified by a diode 9, the filament of which is supplied from the winding 7.
  • the tube 9 is supported by a tube holder 11, which is shown partly in cross-section in Fig. 1 and in bottom plan view in Fig. 2.
  • the tube holder is made of insulating material, for example polymethacrylate, and at its upper end comprises a raised rim 13, which surrounds a receiving aperture for receiving the adjacent end, in the case shown the bottom end, of the tube 9 and is spaced from the latter by a comparatively small intermediate spacing.
  • the tube holder 11 is provided with a lateral extension with a raised edge 15 (Fig. 2).
  • the lateral extension of the tube holder within the edge 15 has a square aperture of passage 19 for the core 1 formed in it, which aperture is surrounded by a raised edge 17.
  • the holder 11 may be mounted on the transformer core 1.
  • the two edges 15 and 17 and the lateral extension of the tube holder 11 form a preferably continuous channel in which the filament current winding 7which in the present case comprises a single turnor at least part thereof is situated.
  • the channel 15, 17 and the tube holder 11 constitute a single insulating moulding; the channel may also serve to secure the moulding to the core 1, for example, by means of glue or cement provided along the edges of the aperture 19.
  • the bare metal parts, i. e. the parts not enclosed by insulating material, of the terminals 211 of the tube holder 11, of the winding 7 and of any further connections to the terminals 21 such as, for example, the supply wire 23, are embedded in insulating material 25, for example in a suitable synthetic resin, in a manner such that at no point non-insulated parts are brought out from the mould ing mass 25 (Fig. 1).
  • the winding 7, which is completely enclosed, may in addition be provided with an insulating sheath of polyethylene; this is necessary when the winding is not embedded throughout its length.
  • the contact pins 27 of the tube 9 communicate with the ambient atmosphere only by way of the annular channel between the rim 13 and the tube 9.
  • this channel is comparatively long and narrow and the resistance it offers to ionisation by the high voltage is such as to substantially prevent flashover phenomena.
  • the bare metal parts are embedded so that there also no contact with the ambient atmosphere is provided which may give rise to flash-over. This result is obtained by means of the described device Without adversely affecting easy replacement of the tube.
  • a transformer having a ferromagnetic core and wound on said core a primary winding and a secondary winding adapted to supply heating current for the cathode of a discharge tube, and means for receiving and supporting said discharge tube in an operating position
  • said tube supporting means being mounted on said ferromagnetic core and comprising two portions, one of said portions substantially enclosing said secondary winding, the other of said portions being adapted to receive said discharge tube.
  • a transformer having a ferromagnetic core and wound on said core a primary winding, a first secondary winding adapted to supply heating current to the cathode of a discharge tube, and a second secondary winding adapted to supply a high voltage for the anode of said discharge tube, and means for receiving and supporting said discharge tube in an operating position
  • said tube supporting means comprising a first portion surrounding and secured to said ferromagnetic core and substantially enclosing a portion of said first secondary winding, said tube supporting means including a second portion having for said discharge tube at one end a receiving aperture surrounded by insulating material and at the opposite end an insulating portion integral with,

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)
US536527A 1954-10-04 1955-09-26 High voltage transformer Expired - Lifetime US2844761A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2844761X 1954-10-04

Publications (1)

Publication Number Publication Date
US2844761A true US2844761A (en) 1958-07-22

Family

ID=19875989

Family Applications (1)

Application Number Title Priority Date Filing Date
US536527A Expired - Lifetime US2844761A (en) 1954-10-04 1955-09-26 High voltage transformer

Country Status (3)

Country Link
US (1) US2844761A (de)
DE (1) DE954791C (de)
NL (2) NL92540C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955246A (en) * 1955-05-09 1960-10-04 John H Reaves Low capacitance power supply

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2301238A (en) * 1940-02-01 1942-11-10 Adlake Co Fluorescent lighting fixture
US2459422A (en) * 1947-05-31 1949-01-18 Fuller Charles Harvey Exciting means for high-frequency display tubes

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2301238A (en) * 1940-02-01 1942-11-10 Adlake Co Fluorescent lighting fixture
US2459422A (en) * 1947-05-31 1949-01-18 Fuller Charles Harvey Exciting means for high-frequency display tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2955246A (en) * 1955-05-09 1960-10-04 John H Reaves Low capacitance power supply

Also Published As

Publication number Publication date
NL92540C (de)
DE954791C (de) 1956-12-20
NL191269A (de)

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