US1509758A - Electric switch - Google Patents

Electric switch Download PDF

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Publication number
US1509758A
US1509758A US406866A US40696620A US1509758A US 1509758 A US1509758 A US 1509758A US 406866 A US406866 A US 406866A US 40696620 A US40696620 A US 40696620A US 1509758 A US1509758 A US 1509758A
Authority
US
United States
Prior art keywords
switch
contacts
movement
spring
energy
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
US406866A
Other languages
English (en)
Inventor
Herman J H Huber
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 DEI21862D priority Critical patent/DE379681C/de
Priority to FR539984D priority patent/FR539984A/fr
Priority to NL12593D priority patent/NL12593C/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority claimed from US406961A external-priority patent/US1536772A/en
Priority to US406866A priority patent/US1509758A/en
Priority to GB3421820A priority patent/GB176147A/en
Priority to GB8249/22A priority patent/GB179882A/en
Priority to FR25330D priority patent/FR25330E/fr
Priority to US551265A priority patent/US1655464A/en
Priority to US529919A priority patent/US1549449A/en
Priority to FR27630D priority patent/FR27630E/fr
Publication of US1509758A publication Critical patent/US1509758A/en
Application granted granted Critical
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
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
    • H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • H01H33/55—Oil reservoirs or tanks; Lowering means therefor

Definitions

  • My invention relates to electric switches, particularly to those switches having contacts separable in insnlating fluid and has for its object to provide an electric switch which is an improvement in many particulars, to be described more in detail hereinafter, in similar vswitches heretofore known 7 in the art.
  • Figs 1 s. side elevation oi a triple pole switch embodying my invention
  • Fig. Q shows the switch mechanism embodying my novel form of energy storing means
  • 39 and Figs. 3, 4, 5 and 6 are views of detailed portions of the switch structure.
  • each unit comprising relatively movable coopersting contacts 1 and 2 separable beneath the surface of oil or similar insulating fluid contained in a vessel or tank 3.
  • the contacts for each unit are controlled by mechanisms operative through a common mechanism 4.
  • Enclosing the mechanisms for each unit is a. cover structure 5 to which are secured the oil vessels 3.
  • the mechanism controlling the switch. contacts forleach unit comprises, as shown in 4 Fig. 2, an actuating'lever or arm 6, which is preferably of wood for purposes of lightness and insulation, secured in a clam member 7. "ikfttached to the end of mem r 6 is a reciprocating rod 8 carrying the movable contacts 2, as bestshown in Fig. 1.
  • I provide a parallelmotion mechanism comprisinguszaralleling links 9 and 10 and a guide 11 secured to paralleling link 10 and movable about the fixed point 12.
  • Links 9 and 10 are connected. at one end to member G or clamp 7 and at the other end to a lever 13 which is movable about a fixed pivot .14.
  • An 15 is also carried by pivot 14 and may be integrsl with lever 15.
  • These arms 15 for each unit are connected by rods 16 whereby simultaneous movement of the mechanisms takes place.
  • These separate mechanisms are controlled from a common opersting mechanism 4 which may be of the solenoid operating type, as shownin Fig. 1, or may be of the hand operated type as desired. By a proper interchange oiparts of mechanism 4, the stroke or extent of movement of the end of levers G can be varied over a wide range.
  • I provide means faci itating the operation of the switch mechanism.
  • I provide a means ior counterbalancing the weight of the mechanism which consists of a resilient or energy storing member 17 secured at cne'end to a, fixed support on the switch and connected at the other end to a bell-crank lever 18.
  • the bell-crank is connected by means of an adjustable rod 19 to an extension 200i guide link 11 through a lost motion connection.
  • the mechanisms for each unit of the switch are rovided with this balancing means, as siown in Fig. 2.
  • this means can be adjusted so that the spring 17 is tensioned at the proper part of switch opening movement.
  • the mechanism can also be adjusted so that sutlicient energy is stored in spring i? to exert a force in switch closing direction substantally equal to the weight of the mechanism. "When the mechanism is, theretore, moved in circuit closing direction, the energy stored in spring 1? is delivered through hell cranh l8 and rod 19 to link 11 and enables the mechanism' to be moved with a minimum of etlort. A comparatively small closing force is therefore sutficient to operate the switch.
  • the lost motion connection between extension and rod 19 is utilized. as a means for cutting oh the effect ct spring l? at a definite point in the switch closing movement.
  • the energy stored in. spring 17 will be exerted to effect a rebounding action when the switch mechanisin'reaches the end of its response to the movement of the mechanism to circuit opening position. to engage an oil dash-pot or similar buffing means, not shown, to absorb the energy of the opening movement. in circuit closing direction.
  • the butter arm 23 is shaped to engage lever 22 near the end of its path of travel and move circuit opening movement. it overcome this.
  • the second energy storing means which is a part of each mechanism is a means for preventing overtra'vel of the mechanism in circuit closing direction.
  • the sudden cessation ot movement of the mechanism must not cause an undue strain due to inertia and for purpose 1 provide a lever 22 in the path of movement oi: buder arm 23' carried by lever The louder arm acts in the lever about its pivot and against the tension exerted by a spring 24. This movement of lever 22 serves to retard the movement oi the mechanism quickly and to pre vent any overtravel with consequent strains on the mechanism.
  • the energy storing means associated with switch mechanism is a means for accelerating the opening movement of the mechanism.
  • 1 provide an energy storing means in comnoon to the whole switch mechanism, as best shown in Fig. 2.
  • This means consists of the energy storing or spring member 25 whichis connected at one end to the wall of the enclosure for the last unit or pole of the triple pole switch shown in Fig. 1. and is connected at the other end to the rod 16.
  • the movement of the switch mechanism to circuit closing position operates rod 16 so that energy isstored in spring 25. This energy is delivered to the switch mechanism during its initial opening" movement to accelerate the mechanism.
  • a lost motion connection is provided between the spring 25' and rod 16 in order to provide a free initial movement of the mechanism in circuit closing direction before tension is exerted on spring 25.
  • switch in switches oi the character described. it is often advantageous to give a visual indication of whether the switch is opened or closed, particularly in the "form of switch shown in Fig. l in which the switch presents the same externalappearance in both open and closed positions.
  • an indicating means of the semaphore type which consists, as shown in Fig. 3, of a pivotally supported signal member having two projecting arms 31 and 32 substantially at right angles. Upon one arm is stamped the word open and upon the other arm the word closed. The arms may also be appropriatelypainted to indicate at a distance whether the switch is open or closed.
  • the member 30 is pivoted within the enclosure of the end unit of the switch and is operated from the link 13 of the parallel motion mechanism through the connecting rod 33 and links 34-.
  • Fig. 4 is shown another improved construction of my switch.
  • l have shown a means for cooling the arc gases formed asthe contacts separate and preventing the ejection of heated particles into the air chamber above the oil.
  • baffling member 35 convenience in assembling, three such sections being shown in Fig. 4.
  • My baffling member comprises two plates provided with openin'gs36 in alignment and between the plates 'is mounted a wire mesh screen so that the openings 36 are screened.
  • Fig. 5 is a plan view of ,one of the end sections.
  • the end sections of the member are secured to a plate 37 at the top of the oil vessel 3 by struts 38 and are spaced apart from the plate and inclined to correspond to the inclination of the terminal members- 39. Openings are provided in the end sections through which the terminal members 39 extend and the sections of the battling member are adapted to surround the terminal members at the ground sleeve thus acting in no way to cut down the striking distance for the arc.
  • the central section of the bafiiing member is carried by a removable central plate 40 co-operating with the plates 37. This section is removable with the plate 40 to provide an opening through which a man can get into the oil vessel to align or properly investigate the contact structure.
  • the bafiling' member 35 supported by the struts forms a rigid member.
  • baing member 35 The passa e of gases through the openings 36 of baing member 35 causes the gases to be broken up and cooled sufliciently so that they do not ignite the gaseous mixture in the 'space above the oil. Due to the wire screen, no highly heated particles can be ejected into the chamber. When the oil level subsides, the small space above the oil and beneath the bafile 35 is so rich in gases that it is noninflammable, so that even should heated particles or hot gases come in contact with these gases, they will not explode.
  • This bafliing means for cooling the arc gases formed as the contacts separate and preventing the ejection of heated particles into the, air chamber above the oil is claimed per se in my divisional application, Serial No. 551,265, filed April 10, 1922, for electric switches.
  • Fig. 6 the lower end of one of the terminal members 39 carrying the fixed contacts 1 which in the form shown comprises a pair of laminated contact fingers 41 to which are secured the guide fingers 42.
  • Co-operating with the fixed contact fingers 41 are the movable contact members 2 wedge-shaped in configuration and carried at one end of the reciprocating rod 8.
  • the movable contact members 2 As the movable contact members 2 are moved into and out of engagement with the fixed contacts, it often occurs that due to slight changes in adjustment the wedge-shaped member as it moves into contact engaging position will strike one of the guide fingers 42 bending it over and causing considerable damage making a poor contact and throwing the mechanism out of order. This condition is effectively overcome by providing means for guiding the movable contacts into proper engagement with the fixed contacts and protecting the guide fingers 42.
  • cam members 43 are ivotally supported by shoulders 44 rigldly carried by extensions 45 supported by the terminal members 39. These cam members 43 are so located relatively to the ends of guide fingers 42' and loosely pivoted to shoulders 44 that should the wedge-shaped movable contact 2 move out of alignment, it will strike one of the cam fingers 43 and be guided into its Ipgoper path without impairing the guide gers 42.
  • the combination -with relatively movable cooperating contact's, of a mechanism for controlling said contacts including an operating arm, an energy-absorbing means, and a member carried-by said arm adapted to operatively engage said means to prevent overtravel of said arm when moving in the circuit closing direction, and a second means in which energy 'is stored during the latter part of the switch closing movement to accelerate the opening movement of the switch 7.
  • the combination with relatively movable cooperating contacts of a mechanism for moving said contacts me straight line including a guide link, an extension to said link, an ener storing device, and a bell-crank adjusta y secured to said extension through a lost motion connection and connected to said energy-storing device operative in response to the final switch opening movement to store energy in said device and prevent rebounding of said contacts.

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
  • Mechanisms For Operating Contacts (AREA)
US406866A 1920-08-30 1920-08-30 Electric switch Expired - Lifetime US1509758A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
DEI21862D DE379681C (de) 1920-08-30 Schaltmechanismus fuer Hochspannungsoelschalter
FR539984D FR539984A (da) 1920-08-30
NL12593D NL12593C (da) 1920-08-30
US406866A US1509758A (en) 1920-08-30 1920-08-30 Electric switch
GB3421820A GB176147A (en) 1920-08-30 1920-12-03 Improvements in and relating to electric switches
GB8249/22A GB179882A (en) 1920-08-30 1921-02-02 Improvements in and relating to electric switches
FR25330D FR25330E (fr) 1920-08-30 1921-08-29 Perfectionnements apportés aux interrupteurs électriques
US551265A US1655464A (en) 1920-08-30 1922-04-10 Electric switch
US529919A US1549449A (en) 1920-08-30 1922-07-17 Electric switching device
FR27630D FR27630E (fr) 1920-08-30 1923-04-09 Perfectionnements apportés aux interrupteurs électriques

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US40396620A 1920-08-30 1920-08-30
US406961A US1536772A (en) 1920-08-30 1920-08-30 Electric switch
US406866A US1509758A (en) 1920-08-30 1920-08-30 Electric switch

Publications (1)

Publication Number Publication Date
US1509758A true US1509758A (en) 1924-09-23

Family

ID=27410564

Family Applications (1)

Application Number Title Priority Date Filing Date
US406866A Expired - Lifetime US1509758A (en) 1920-08-30 1920-08-30 Electric switch

Country Status (4)

Country Link
US (1) US1509758A (da)
FR (2) FR25330E (da)
GB (1) GB179882A (da)
NL (1) NL12593C (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460462A (en) * 1945-02-16 1949-02-01 Westinghouse Electric Corp Circuit controller

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105551843A (zh) * 2016-02-13 2016-05-04 河南莱源电气有限公司 一种复合开关

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2460462A (en) * 1945-02-16 1949-02-01 Westinghouse Electric Corp Circuit controller

Also Published As

Publication number Publication date
FR539984A (da) 1922-07-04
GB179882A (en) 1922-05-02
FR25330E (fr) 1923-01-24
NL12593C (da)

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