US1785575A - Ratio-adjusting switch - Google Patents

Ratio-adjusting switch Download PDF

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Publication number
US1785575A
US1785575A US397124A US39712429A US1785575A US 1785575 A US1785575 A US 1785575A US 397124 A US397124 A US 397124A US 39712429 A US39712429 A US 39712429A US 1785575 A US1785575 A US 1785575A
Authority
US
United States
Prior art keywords
connector
contacts
terminals
shaft
main
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
US397124A
Other languages
English (en)
Inventor
Louis F Blume
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.)
General Electric Co
Original Assignee
General Electric Co
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
Priority to BE373895D priority Critical patent/BE373895A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US397124A priority patent/US1785575A/en
Priority to FR39137D priority patent/FR39137E/fr
Priority to GB29655/30A priority patent/GB364630A/en
Priority to DE1930554250D priority patent/DE554250C/de
Application granted granted Critical
Publication of US1785575A publication Critical patent/US1785575A/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
    • H01H9/0016—Contact arrangements for tap changers

Definitions

  • My invention relates to switches.
  • the general object of the invention is to provide a switch iaving main current carrying contacts with an improved arrangement of automatically controlled arcing contacts to prevent injury to the main contacts when the switch .is operated to open or close a circuit or to change circuit connections while the circuit is carrying current.
  • the invention may be appiied with advantage and will be explained in connection with a switch of the type disclosed in Figures and 6 of my United Sta-tes Patent No. 1,535,807, issued April 28, 1925.
  • FIG. 1 shows a switch, partly in section, made in accordance with the invention
  • Figs. 2, 3 and 11 are sectional views on the lines 2-2, 3-3 and 1-4 respectively of Fig. 1.
  • the particular switch shown in the drawn ings includes a plurality of spaced conducting rods or terminals 10, L11, 12, 13, 14 and 15 supported between a pair of insulating plates 16 and 1T and surrounding a central-shaft 18 carried in bearings in the plates 16 and 17.
  • the terminal 15 is removed and other parts are shown in section to reveal the structure more clearly.
  • Six of the terminals are shown spaced uniformly about the shaft 18 although it will be apparent that a larger or smaller number may be used if desired.
  • r1 ⁇ he desired connections between the terminals are made by a connector 19 rotatably supported about an offset portion ofthe shaft 18 and including movable contacts 20 and 21 which are secured to the body of the connector 19 by springs 22.
  • the connector 19 is provi-ded with a rigid armr23 with an anti-friction roller 21 at its outer end.
  • Thearm 23 is at the end of the v nector 19 and its contacts 2O and 21 between their different terminal connecting ⁇ positions.
  • the terminals and 11 are connected together by the connector.
  • the shaft 18 is rotated in a clockwise direction as seen in F ig. 2, the offset po-rtion of the shaft which carriesthe connector moving in a circular path about the axis of rotation of the shaft.
  • the terminals 10 to 15 and contacts 2O and 21 are adapted to carry current continuously without injury but these contacts cannot be used to make or break the current without injury to both the contacts and terminals by arcing at the surfaces where the current is made or broken.
  • an improved arrangement including auxiliary arcing contacts is provided. Any injury due to arcing takes place at these auxiliary contacts which are simple and inexpensive and which may be easily replaced whenever desirable.
  • An auxiliary connector including the arcing contacts 27 connected together by a spring member 28, is secured to the outer end of an arm 29 projecting from a sleeve 30 surrounding the shaftc18.
  • the sleeve 30 withits arm 29 and the auxiliary connector are arranged to rotate freely about one end of the shaft 18 beyond its offset portion so that the connector rotates in a circular path about the axis of rotation of the shaft 18.
  • the main connector 19 carries a pin 31 which projects into a groove 32 in a plate secured to the arm 29. Thenever the main connector 19 moves to shift its main contacts 2O and 21 from one contact making position to another, the pin 31 will engage one 'side or the other of the groove 32 and shift the arm 29 with the auxiliary arcing contacts 27 between the same contact making positions.
  • Each of the terminals 10 to 15 is tubular and has its inner side cut away opposite the arcing contacts 27.
  • a small cylindrical iixed-arcing Contact l-l is secured within each of the tubular terminals 10 to 15 at its cut-away portion and the spring member 28 forces the movable arcing contacts 27 against these fixed contactsV 3/1 as shown in Figs. 3 and 4t.
  • the pin 31 controls the auxiliary connector so that the auxiliary contacts and the 'spring member 28 always connect the same two terminals that are connected to gether by the main connector.
  • the main contacts 2O and 21 move from one contact making position to the next through a curved path which is convex toward the shaft 18 as already explained and the motion of the contacts at each end of this path has a large radial component toward or away from the shaft.
  • the outer end of the groove 32 in the pl ate 33 is also enlarged so that there is some free space in this groove at each side of the pin 31. r.llhe main con acts 2O and 21 therefore leave the two main terminals with which they have been in contact before the pin 31 engages one side or the other of the groove 32 and therefore before the auxiliary arcing contacts start to move, the latter then carrying all the current and preventing any arcing at the main contacts as these are opened.
  • the pin 31 is then drawn back into the narrower part of the groove 32 and engages one of its sides to shift the arcing contacts to the nextcontact making position. lt will be apparent that the arcing contacts will reach this next contact making position while the pin 31 is still in the narrower part of the groove 32 and that the main contacts will [inally be forced radially outward into the new position. in changing from one contact making position to the next, therefore, the circuit is always broken last and made first through the arcing contacts and no arcing can occur at the main contacts.
  • a switch including a plurality of terminals, a main terminal connector, an auxiliary terminal connector, means for moving said main connector' from one terminal connecting position to another, and means for movingsaid auxiliary connector between the same terminal connecting positions during the motion of the main connector, whereby the main connector is protect-ed from arcing.
  • a switch including a plurality of terminals, a main terminal connector, an auxiliary terminal connector', means for moving said main connector from one terminal connecting position toanother, and means controlledvby said main connector moving means for moving said auxiliary connector between the same terminal connecting positions during the mo tion of the main connector, whereby the main connector is protected from arcing.
  • 3. .fr switch including a shaft having an offset portion, a plurality of terminals spaced about said shaft, a main connector rotatable on the offset portion of the shaft, means for guiding the main connector from one termin ai co. necting position to another' as the shaft is rotated, an auxiliary connector rotatable on said shaft, and a pin and groove connection between said connectors.V
  • A. switch including a shaft having an offset portiona plurality of terminals spaced about said shaft, a main connector rotatable e offset portion of the shaft, means -for ring the main connector from one terminal connecting position to another as the shaft is rotated, an auxiliary connector rotatable an said shaft, and a pin and groove connection between haid connectors, a portion of said groove being enlarged to provide lost motion between said connectors during part of their motion between terminal connecting positions.

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
US397124A 1923-01-13 1929-10-03 Ratio-adjusting switch Expired - Lifetime US1785575A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE373895D BE373895A (enrdf_load_stackoverflow) 1929-10-03
US397124A US1785575A (en) 1929-10-03 1929-10-03 Ratio-adjusting switch
FR39137D FR39137E (fr) 1923-01-13 1930-10-01 Perfectionnements aux commutateurs
GB29655/30A GB364630A (en) 1929-10-03 1930-10-03 Improvements in or relating to arcing preventing devices for electric switches
DE1930554250D DE554250C (de) 1929-10-03 1930-10-04 Schalter zur aufeinanderfolgenden Betaetigung mehrerer Kontakte

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US397124A US1785575A (en) 1929-10-03 1929-10-03 Ratio-adjusting switch

Publications (1)

Publication Number Publication Date
US1785575A true US1785575A (en) 1930-12-16

Family

ID=23569928

Family Applications (1)

Application Number Title Priority Date Filing Date
US397124A Expired - Lifetime US1785575A (en) 1923-01-13 1929-10-03 Ratio-adjusting switch

Country Status (4)

Country Link
US (1) US1785575A (enrdf_load_stackoverflow)
BE (1) BE373895A (enrdf_load_stackoverflow)
DE (1) DE554250C (enrdf_load_stackoverflow)
GB (1) GB364630A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3014999A (en) * 1957-10-24 1961-12-26 Acec Multi-contact electrical switches
US3652812A (en) * 1970-09-28 1972-03-28 Westinghouse Electric Corp Tap changer switch with radial pressurized movable contact structure
US4496805A (en) * 1983-09-09 1985-01-29 Warco, Inc. Transformer switch
DE102010020138B4 (de) * 2010-05-11 2015-08-13 Maschinenfabrik Reinhausen Gmbh Umsteller für einen Transformator
DE102010020040B4 (de) * 2010-05-11 2016-06-09 Maschinenfabrik Reinhausen Gmbh Schaltanordnung für einen Transformator mit einer an einer Schaltwelle befestigten Kontaktanordnung mit mehreren Kontaktelementen

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE762231C (de) * 1934-12-09 1954-05-17 Siemens Schuckertwerke A G Regelschalter fuer Transformatoren
DE756921C (de) * 1940-06-08 1953-09-07 Philips Nv Vielfachdrehschalter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3014999A (en) * 1957-10-24 1961-12-26 Acec Multi-contact electrical switches
US3652812A (en) * 1970-09-28 1972-03-28 Westinghouse Electric Corp Tap changer switch with radial pressurized movable contact structure
US4496805A (en) * 1983-09-09 1985-01-29 Warco, Inc. Transformer switch
DE102010020138B4 (de) * 2010-05-11 2015-08-13 Maschinenfabrik Reinhausen Gmbh Umsteller für einen Transformator
DE102010020040B4 (de) * 2010-05-11 2016-06-09 Maschinenfabrik Reinhausen Gmbh Schaltanordnung für einen Transformator mit einer an einer Schaltwelle befestigten Kontaktanordnung mit mehreren Kontaktelementen

Also Published As

Publication number Publication date
BE373895A (enrdf_load_stackoverflow)
GB364630A (en) 1932-01-04
DE554250C (de) 1932-07-07

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