GB1271821A - Means for tapping a coil under load - Google Patents

Means for tapping a coil under load

Info

Publication number
GB1271821A
GB1271821A GB4619168A GB4619168A GB1271821A GB 1271821 A GB1271821 A GB 1271821A GB 4619168 A GB4619168 A GB 4619168A GB 4619168 A GB4619168 A GB 4619168A GB 1271821 A GB1271821 A GB 1271821A
Authority
GB
United Kingdom
Prior art keywords
rollers
assemblies
carbon
choke
brass
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
GB4619168A
Inventor
Ernest Alan Hinksman
Edward Charles Higgins
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.)
MIDLAND TRANSFORMER Co LT
Original Assignee
MIDLAND TRANSFORMER Co LT
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 MIDLAND TRANSFORMER Co LT filed Critical MIDLAND TRANSFORMER Co LT
Priority to GB4619168A priority Critical patent/GB1271821A/en
Publication of GB1271821A publication Critical patent/GB1271821A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/16—Contacts characterised by the manner in which co-operating contacts engage by abutting by rolling; by wrapping; Roller or ball contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
    • H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/06—Variable transformers or inductances not covered by group H01F21/00 with current collector gliding or rolling on or along winding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/027—Composite material containing carbon particles or fibres
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02—Details
    • H01H15/06—Movable parts; Contacts mounted thereon
    • H01H15/08—Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

1,271,821. Transformers; inductors; switch contacts. MIDLAND TRANSFORMER CO. Ltd. 16 Dec., 1969 [28 Sept., 1968], No. 46191/68. Headings H1N and H1T. A rectangular coil 10 is tapped on load by two assemblies 19, 22 which are moved either alternately or together along the coil surface and which consist of carbon rollers 21, 24 connected in parallel with brass rollers 20, 23 respectively. The brass rollers 20, 23 break before making as they move along arcing-resistant contact strips 11a, 11b, 12a, 12b &c. which are separated by broad, flush insulation strips 18. The carbon rollers 21, 24 make before breaking as they move along central portions 11c, 12c &c. of the coil turns and bridge adjacent turns across narrow, recessed insulation strips 17. The assemblies 19, 22 are connected to the ends of a choke of which a centre tap is connected to the load or supply, the choke thus acting in addition to the carbon rollers to limit circulating currents. One assembly passes entirely from a first turn to an adjacent turn before the other assembly leaves the first turn. The assemblies are preferably moved with a snap-action and alternate motion may be produced by a Geneva mechanism. The two contact assemblies may alternatively comprise simply a carbon roller (25, Fig. 7, not shown) and a brass roller (26) moved alternately and connected in parallel with no intervening choke.
GB4619168A 1968-09-28 1968-09-28 Means for tapping a coil under load Expired GB1271821A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4619168A GB1271821A (en) 1968-09-28 1968-09-28 Means for tapping a coil under load

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4619168A GB1271821A (en) 1968-09-28 1968-09-28 Means for tapping a coil under load

Publications (1)

Publication Number Publication Date
GB1271821A true GB1271821A (en) 1972-04-26

Family

ID=10440229

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4619168A Expired GB1271821A (en) 1968-09-28 1968-09-28 Means for tapping a coil under load

Country Status (1)

Country Link
GB (1) GB1271821A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007012293A1 (en) * 2005-07-29 2007-02-01 Yuan Li Roller-style electric switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007012293A1 (en) * 2005-07-29 2007-02-01 Yuan Li Roller-style electric switch

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee