US3609267A - Electric load changeover switch with movable contacts insertable in a rotary shaft, and arc discharge channels - Google Patents

Electric load changeover switch with movable contacts insertable in a rotary shaft, and arc discharge channels Download PDF

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Publication number
US3609267A
US3609267A US853252A US3609267DA US3609267A US 3609267 A US3609267 A US 3609267A US 853252 A US853252 A US 853252A US 3609267D A US3609267D A US 3609267DA US 3609267 A US3609267 A US 3609267A
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United States
Prior art keywords
movable contacts
electric load
blocks
bushing
switch
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Expired - Lifetime
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US853252A
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English (en)
Inventor
Nikolai Ivanovich Egorov
Jury Grigorievich Kron
Jury Ivanovich Moiseev
Jury Alexandrovich Putov
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Individual
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    • 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
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/64—Encased switches adapted for ganged operation when assembled in a line with identical switches, e.g. stacked switches

Definitions

  • Vanderhye AuomeyWaters, Roditi, Schwartz & Nissen ABSTRACT An electric load switch, comprising a set of blocks each formed of an insulating material having fixed contacts located in them and a changeover shaft extending through these blocks with movable contacts mounted on it, wherein the switch is simple in design and comparatively small in size, reliable in operation, and easily assembled for a plurality of poles of an electric circuit due to the presence of unified or connectable elements.
  • the present invention relates to commutation electric devices and, more particularly, to electric load changeover switches and is designated for connecting and disconnecting electric power circuits.
  • Conventional electric load switches for example knife switches, comprise a base plate made of an insulating material, assembled on which are fixed contact elements and a contact changeover rotor (shaft) installed on supports and provided along its axis with laterally extending profiles apertures in which movable contacts are secured by blade springs.
  • a contact changeover rotor shaft
  • the moveable contacts are pressed in the closed position towards the springs by the fixed contacts, thus providing for the necessary contact pressure.
  • Such switches are rather bulky, have a large quantity of fastening elements (screws, nuts, washers), require for insulation base plates of different sizes, depending on the number of poles, and do not ensure the electrodynamic stability of the switch at short circuit currents, because the movable contacts touch the fixed ones with one side only.
  • multipole electric changeover switches which are a set of blocks (packages) with fixed and movable contacts inside them which are switched by means of a common changeover shaft.
  • Such changeover switches are used for switching weak current circuits of secondary commutation and can not be used for switching off electric power loads.
  • a movable contact consisting of at least two elongated contact elements spring pressed from opposite sides and bound with stop washers.
  • the above movable contacts are designed for high voltage disconnectors and can not be used in electric load switches without appropriate design changes in the device.
  • An object of the present invention resides in eliminating the aforesaid drawbacks.
  • a particular object of the present invention is to design an electric load switch simple in design and comparatively small in size, reliable in operation, easy to assemble, and consisting of standard elements, which will make it possible to easily assemble a switch for different number of poles of an electric circuit.
  • the present electric load switch comprising a set of blocks of an insulating material with fixed contacts and a changeover shaft disposed in said blocks, said shaft having along its axis a number of lateral apertures, each one of said apertures housing a movable contact made up of at least two elongated contact elements spring pressed from the the opposite sides and held together by means of locking devices, in which, in accordance with the present invention, the central parts of the blocks are made in the form of bushings through which the changeover shaft carrying the movable contacts is passed, and on the external sides of the bushings every block has, at least on one side, commutation channels for the outlet of the are when cutting out the electric load.
  • the butts of the bushings and the adjoining locking devices of the movable contacts have a shape which ensures that the bushing butts in the process of rotation of the shaft during the changeover of the switch are the guides for the locking device of the movable contacts and keep the latter in line with the fixed contacts.
  • butts of the bushings with shoul-. ders in the form of concentric grooves and the locking means (plates) of the movable contacts entering them with curvatures on the two opposite ends.
  • the curvatures should correspond to the diameter of the concentric grooves.
  • the switch made in compliance with the present invention, successfully solves the raised problems.
  • the switch of the present invention cuts down copper consumption, extends its service life as a result of a double break of each phase and deconcentration of friction surfaces. There is a visible phase break and, besides, a certain selection of the combination of fixed contacts and blocks makes it possible to use the switch as a two-way changeover switch.
  • FIG. 1 is a general view of a switch, according to the invention.
  • FIG. 2 is a cross section of FIG. I along lines lI-ll, the contacts being in the closed position;
  • FIG. 3 is the extreme block of the switch
  • FIG. 4 is a cross section of FIG. 3 along line lV-IV;
  • FIG. 5 is an intermediate block of the switch
  • FIG. 6 is a cross section of FIG. 5 along line Vl-VI;
  • FIG. 7 shows fixed and movable contacts of the switch in the closed position
  • FIG. 8 is the changeover shaft of the switch
  • FIG. 9 is a locking device of the movable contact
  • FIG. 10 is a view of FIG. 8 along arrow A;
  • FIGS. 1 and 2 show that the present switch comprises blocks 1, 2, 3 and 4 connected with each other and insulating material, fixed contacts 5, clamped in the slots of the joining surfaces of these blocks, and a changeover shaft 6 made of an insulating material, with movable contacts 7 mounted on said shaft.
  • the number of blocks is determined by the number of poles in the electric circuit. Described in the present embodiment is a three pole electric load switch in which blocks I and 4 are the extreme ones and blocks 2 and 3 are the intermediate ones.
  • the central parts of the extreme blocks 1 and 4 are made as bushings 8 (Figs. 3 and 4) whose butts on one side (on the side adjoining the movable contacts) carry shoulders in the fonn of concentric grooves 9 with arresters I0 to limit the travel of the movable contacts 7.
  • the same side of the blocks I and 4 carry commutation channels 11 through which the electric arc, appearing during the changeover when the switch is energized, is thrown outside.
  • the intermediate blocks 2 and 3 are made similarly to the blocks 1 and 4, except that the butts of the bushings 8 are provided on both sides with concentric grooves 9 with arresters 10 (Figs. 5 and 6) and accordingly commutation channels I] are provided on both sides of the blocks 2 and 3.
  • the movable contact 7 of the switch consists of two parallel elongated contact elements 12 (FIG. 7), limit pins I3 carrying lugs 14 in their middle part, springs 15 and a locking device, for example plates 16.
  • Each such movable contact 7 is mounted on the changeover shaft 6 in one of its apertures 17 (FIG. 8), provided along the axis of the shaft 6.
  • the changeover shaft 6 carrying movable contacts 7 is passed through the bushings 8 of the blocks 1, 2, 3 and 4, and the plates 16 of the movable contacts 7 enter the adjoining concentric grooves 9 of the bushings 8.
  • the plates 16 of the movable contacts 7 are made with curvatures 18 (FIG. 9) on the two sides of the contour in accordance with the diameter of the concentric grooves 9 and, as a result, in the process of rotation of the changeover shaft 6, when the switch is operated the bushings 8 are the guides for the plates 16. Thus, they ensure a centered fixation of the movable contacts and keep the latter in line with the fixed contacts.
  • the plates 16 of the movable contacts 7 and the bushings 8 may have other configuration, for example, the butt of the bushing 8 may be made without a concentric groove and the plate 16 may be made as a bracket. In this case the bushing 8 will also be the guide for the adjoining bracket-shaped plate 16.
  • An electric load switch comprising: a set of adjacent blocks each made of an insulating material, the interior central portion of each block constituting a bushing, each said bushing having, on at least one exterior side of each of said blocks, commutation channels for the egress of electric arcs which are generated during the switching off of the electric load; fixed contacts located between each of said adjoining blocks; a rotatable changeover shaft formed of an insulating material axially extending through said bushings, said shaft including a plurality of lateral apertures along its axis; movable contacts located in each of said apertures of the changeover shaft, each of said movable contacts comprising at least two contact elements, spring means on opposite sides of said movable contacts, locking means connected to said spring means so as to have said spring means effect a compressive force on said contact elements, said locking means and the corresponding butts of said block bushings having complementary configurations so as to enable said bushing butts to form guide surface means for said locking means and to maintain said movable contacts in

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)
  • Push-Button Switches (AREA)
US853252A 1968-08-27 1969-08-27 Electric load changeover switch with movable contacts insertable in a rotary shaft, and arc discharge channels Expired - Lifetime US3609267A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU1265425A SU333620A1 (ru) 1968-08-27 1968-08-27 Рубильник

Publications (1)

Publication Number Publication Date
US3609267A true US3609267A (en) 1971-09-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
US853252A Expired - Lifetime US3609267A (en) 1968-08-27 1969-08-27 Electric load changeover switch with movable contacts insertable in a rotary shaft, and arc discharge channels

Country Status (9)

Country Link
US (1) US3609267A (de)
AT (1) AT290659B (de)
BE (1) BE738047A (de)
BG (1) BG18796A1 (de)
DE (1) DE1943231C3 (de)
FR (1) FR2017053B1 (de)
GB (1) GB1282925A (de)
SE (1) SE347605B (de)
SU (1) SU333620A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4412116A (en) * 1982-05-26 1983-10-25 Westinghouse Electric Corp. Circuit breaker with unitary actuating shaft
US5886311A (en) * 1996-09-16 1999-03-23 Schneider Electric Sa Multipole electrical switch having one elementary switching bar per pole
CN100388399C (zh) * 2005-12-19 2008-05-14 上海伊莱克斯实业有限公司 一种防护隔离型转换开关

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4778953A (en) * 1986-08-04 1988-10-18 Ohi Seisakusho Co., Ltd. Sealed rotary switch
RU186337U1 (ru) * 2018-09-05 2019-01-16 Закрытое акционерное общество "Производственное объединение Электротехник" Выключатель-разъединитель
RU195709U1 (ru) * 2019-11-13 2020-02-04 Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный индустриальный университет", ФГБОУ ВО "СибГИУ" Выключатель-разъединитель
RU195370U1 (ru) * 2019-11-29 2020-01-23 Общество с ограниченной ответственностью "МФК ТЕХЭНЕРГО" Рубильник

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE521422A (de) * 1952-07-14
FR13584E (fr) * 1907-03-27 1911-05-12 Otto Engel Système de contact électrique
DE485208C (de) * 1929-10-28 Siemens Schuckertwerke Akt Ges Paketschalter
US2318488A (en) * 1941-01-10 1943-05-04 Cutler Hammer Inc Circuit controlling device
GB586787A (en) * 1944-10-11 1947-03-31 Eric Mcewan Dakin Improvements in rotary electric switches
US2440578A (en) * 1946-05-27 1948-04-27 Arrow Hart & Hegeman Electric Rotary switch contact assembly
US2466072A (en) * 1945-10-17 1949-04-05 Ark Les Switch Corp Electric switch
US3202775A (en) * 1959-12-04 1965-08-24 Gen Electric Rotor type electric switch with resiliently mounted contact members

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE485208C (de) * 1929-10-28 Siemens Schuckertwerke Akt Ges Paketschalter
FR13584E (fr) * 1907-03-27 1911-05-12 Otto Engel Système de contact électrique
US2318488A (en) * 1941-01-10 1943-05-04 Cutler Hammer Inc Circuit controlling device
GB586787A (en) * 1944-10-11 1947-03-31 Eric Mcewan Dakin Improvements in rotary electric switches
US2466072A (en) * 1945-10-17 1949-04-05 Ark Les Switch Corp Electric switch
US2440578A (en) * 1946-05-27 1948-04-27 Arrow Hart & Hegeman Electric Rotary switch contact assembly
BE521422A (de) * 1952-07-14
US3202775A (en) * 1959-12-04 1965-08-24 Gen Electric Rotor type electric switch with resiliently mounted contact members

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4412116A (en) * 1982-05-26 1983-10-25 Westinghouse Electric Corp. Circuit breaker with unitary actuating shaft
JPS58214234A (ja) * 1982-05-26 1983-12-13 ウエスチングハウス　エレクトリツク　コ−ポレ−シヨン 回転開閉器
US5886311A (en) * 1996-09-16 1999-03-23 Schneider Electric Sa Multipole electrical switch having one elementary switching bar per pole
CN100388399C (zh) * 2005-12-19 2008-05-14 上海伊莱克斯实业有限公司 一种防护隔离型转换开关

Also Published As

Publication number Publication date
BE738047A (de) 1970-02-27
FR2017053B1 (de) 1974-10-31
DE1943231A1 (de) 1970-10-15
AT290659B (de) 1971-06-11
BG18796A1 (de) 1975-03-20
DE1943231B2 (de) 1974-05-02
SE347605B (de) 1972-08-07
SU333620A1 (ru) 1971-11-30
GB1282925A (en) 1972-07-26
DE1943231C3 (de) 1974-12-05
FR2017053A1 (de) 1970-05-15

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