US1828496A - Tap switch - Google Patents

Tap switch Download PDF

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Publication number
US1828496A
US1828496A US261930A US36193029A US1828496A US 1828496 A US1828496 A US 1828496A US 261930 A US261930 A US 261930A US 36193029 A US36193029 A US 36193029A US 1828496 A US1828496 A US 1828496A
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US
United States
Prior art keywords
movement
brushes
spindle
contact
switch
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
US261930A
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English (en)
Inventor
Haller Arnold
Rump Sigurd
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.)
BBC Brown Boveri AG Germany
Original Assignee
Bbc Brown Boveri & Cie
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 Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of US1828496A publication Critical patent/US1828496A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/0005—Tap change devices
    • H01H9/0027—Operating mechanisms

Definitions

  • This invention relates to improvements .in electric switches and, more particularly, to step switches such as are used for changing the ratio of transformers.
  • Suchchange may be made in :1. continuous or in a step-by-step manner. "ll hen the step-by-step method is used. for a transformer having a single primary winding, it is usual to connect an auto-transformer with a middle point tap, a reactance or a resi stance between the taps to prevent. themcurrence of high currents during the transition period.
  • Such switches have been constructed in which the several. brushes. are moved simultaneously over the contacts with the one brush in advance of the other. But this arrangement requires a large amount of space and is uneconomical in construction.
  • 1 further object of the invention is to provide a switch in which the contact arms will not move simultaneously over the contact members but in which one arm will move in ad ance of the other.
  • Another object of the invention is to provide a switch having a step-by-step movement in which the contact members are of substantially the same width as the brush members thereby permitting the insertion of a greater number of contacts in the same space than was possible heretofore.
  • Fig. 2 is a partial top plan view of Fig. 1, and
  • Fig. 3 is a schematic diagram illustrating 261,930, and in Germany May 25, 1928.
  • the numeral 6 indicates a base plate of insulating material secured to a piece of electrical apparatus (not shown).
  • a hollow cylindrical support 7 is attachedto the base plate 6 in an upright position at the center of a circle formed by a plurality of contact members 8.
  • Support 7 is formed. with an annular portion 9 extending therefrom, the purpose of which Will appear hereinafter, and is adapted to receive a spindle. 12 which is arranged to be rotated by a handle 13 secured thereto by means of a tube 15 of suitable insulating material.
  • An arm lti is attached, at one ofits ends, to spindle 12. to rotate therewith and is attached at the other end to a spindle 17 to secure rotation thereof for operating the switch as will be apparent.
  • An annular cam member 10 having aplurality of serrations 11, about the circumf'erence, is also attached to the base plate 6.
  • a main contact arm 18 having brushes 20 and 21 at the ends thereof is arranged to rotate on spindle 17 whereby brush 2O slides on the upper side of the contact members 8 and brush 21 slides on the upper side of extension 9 of support 7.
  • An are shaped rack 22 is secured tothe underside of arm 18 to provide a means for moving the same as will appear hereinafter.
  • a second or auxiliary contact arm 23 is arranged in rotatable insulated relation on spindle 17 and is provided with an arc shaped rack 25, for cooperation with members to be hereinafter described, and is equipped at one end with a brush 26 sliding on the underside of contact members 8 and is provided at the other end with a brush 27 sliding on cam 10.
  • Contact arm 23 is formed with extensions 30 and 31, at an angle to the longitudinal axis thereof, provided at their ends with rollers 32 and 33" adapted to move into and out of the serrations of cam 10 as'will be described.
  • a gear 35 formed of suitable insulating material is mounted on a spindle 36 fixed to spindle 17' and rotates in contact with racks 2.? and 25.
  • a switch for changing the tap connections of a transformer under load a lurality of tap contacts, a plurality of brus 16S, and means for alternately and intermittently moving said brushes in sequence over the taps and simultaneously moving said brushes relative to each other.
  • a switch for changing the tap connections of a transformer under load a plurality of tap contacts, a plurality of brushes arranged for super-imposed movement over said contacts, means interconnecting said brushes to create a tendency for movement thereof in opposite directions, and means for alternately causing intermittent movement of said brushes in the same direction.
  • a switch for changing the tap connections of a transformer under load a. plurality of tap contacts, a plurality of brushes arranged for super-imposed movement over said contacts, racks secured to each of said brushes, :1 gear engaging said racks to create a tendency for movement of said brushes in opposite directions, and means for alternate- 1y causing intermittent movement of said brushes in the same direction.
  • a switch for changing the tap connections of a transformer under load a plurality of tap contacts, a plurality of brushes arranged for super-imposed movement over said contacts, means interconnecting said brushes to create a tendency for movement thereof in opposite directions, a substantially circular cam member arranged in fixed relations to said contacts, and means connected with one of said brush members and engaging said cam for causing intermittent movement of said brushes in the same direction.
  • a switch for changing the tap con nections of a transformer under load a plurality of tap contacts, a plurality of brushes arranged for super-imposed movement over said contacts, racks secured to each of said brushes, a gear engaging said racks to create a tendency for movement of said brushes in opposite directions, a substantially circular cam arranged in fixed relation to said contacts, and means connected with one of said brush members and engaging said cam for causing intermittent movement of said brushes in the same direction.

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  • Motor And Converter Starters (AREA)
US261930A 1928-05-25 1929-05-10 Tap switch Expired - Lifetime US1828496A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1828496X 1928-05-25

Publications (1)

Publication Number Publication Date
US1828496A true US1828496A (en) 1931-10-20

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ID=7745043

Family Applications (1)

Application Number Title Priority Date Filing Date
US261930A Expired - Lifetime US1828496A (en) 1928-05-25 1929-05-10 Tap switch

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US (1) US1828496A (enrdf_load_html_response)
BE (1) BE359210A (enrdf_load_html_response)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204049A (en) * 1962-02-09 1965-08-31 Asea Ab Tap changing apparatus with waveshaped control means and roller selector arm structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204049A (en) * 1962-02-09 1965-08-31 Asea Ab Tap changing apparatus with waveshaped control means and roller selector arm structure

Also Published As

Publication number Publication date
BE359210A (enrdf_load_html_response)

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