US1652508A - Oil switch and controlling mechanism - Google Patents

Description

Dec. 13,1927.

C. AALBORG OIL SWITCH AND CONTROLLING MECHANISM Filed Sept. 2, 1922 4 Sheets-Sheet 1 Fig.1.

Contact Member: Closed WITNESSES: Wfi J- OIL SWITCH AND CONTROLLING MECHANISM Filed Sept. 2, 1922 4 Sheets-Sheet 2 Jr {0 4L\\ lNVENTOR Chrisiz'an Aalborg.

1,652,508 c. AALBORG V OIL SWITCH AND CONTROLLING MECHANISM Filed Sept. 2, 1922 4 Sheets-Sheet 3 Canhuf Mrmtef: Open E WITNESSES: INVENTOR v w I 40 Chrislian Aalbozzg.

. rr"r1 BY Dec. 13,1927. 7

C. AALBORG OIL SWITCH AND CONTROLLING MECHANISM Filed Sept. 2, 1922 4 Sheets-Sheet 4 Closed Posilion INVENTOR Chrislian Aalbo WITNESSES:

I BY ATTORNEY Patented Dec. 13, 1927.

'. cnnls'rmn IAALBORG, or" ITTSBURGH,"rENns vAivIA, ASSIGNOB TO ,wnsrmqnonsn ELEcTnI'o & MANUFACTURING COMPANY, A CORPORATION or rnmvsrnon. swncnnivn 'ooivrRonLIne MECHANISM;

j Application filedseptember 2, 1922. Serial No." 585,879.

My invention relates to circuitinterrup-I ters having relatively :movable contact mem-k bers immersed in a fluid," and more par-.

- ticularly to the mechanism forgoperating the contact members. 1

One object of my invention is 'to provide an operating mechanism for largecapacity circuit ,interrupters which is designed to se-:

curely hold .the contact members during the severe.fblowout forces incident to the nterruption. of electrical c'urrentsof great magnitude. t

' 'Anotherobject of my inventlon is to provide an operating mechanism forjcircuit interrupters which shall be quick andfpositive in its operation.. A iurther object of my 1T1Vent1011-. 1S to N provide anoperating mechanism for circuit 'interrupters which shall be simple in con;

struction and consist of .few parts.

I have 'foundthatf'the blowout forces,

both electrical and chemical,incidental. to the'interruption of an electricalclrcuit car rying a large. currentaatahigh voltage, to

be so severe as to require greaterstrengthening and .bracingof the. supporting rods carrymg the movable contact member than is found in" the mechanisms heretofore eon-' structed. 9

In accordance withmy invention, a guide member is rigidly secured to an inner wall of the receptacle enclosing the'circui-t-inten rupting mechanism. A pair- 0f movable supporting. rods are arranged' tomove par.- allel with, and adjacent to, said guidememhers, thereby receiving additional support.

" The movable contact; member is securedto A plurality of curedto the movable contact :member at both supporting I members, k thereby giving the contact member greater resistance toy bending; moments and securing a simultaneousbreak from-bothlof thefixed contact members.

supporting rods, are sespaced points. Thesupportingrods-are sus- :pended from. a common ,member' which is. pivotally supported by atra'in of link mechanism... The supporting rods are secured to a guide post in such amannerthat they are .braceda short distance from their connec tionto the movable contact member.

Because of the comparatively shortfunv the contact members are brace said rods.

supported portions of the supporting rods and because of the existence of a plurality of fixed bearing points on the moving contact member, twisting and bending of these parts interrupter showing the position of thecontrolling mechanism when the contact members are in a' closed position. v Fig. 2 is a similar view'illustrating the position of the controlling mechanism when thecontact members'areinfa semi-open'posit1on. 1.

Fig. 3- is a similar-view illustrating the positionof the controlling mechanism when p in their open position. r

LFig. 4.15 a view,'partially in section and I partially in elevation,'o'f a circuitinterrupter equ pped With my invention.

-Fig. 5,is a side view of the link mechanism taken along the line IV-'IV of-Fig. '3.

. In the several. figures of the drawing, similar referencenumerals refer to like parts.

In Fig. 415' shown a circuit interrupter 1, of any desired form, comprising a tank portion '2. and a cap portion 3. In practice, the

Secured to the cap 3 are a pair ofiin'sulai anism,to be hereinafter"described. In case a polyphase circuit mterrupter be desired, a

correspondingnumber of insulators 4; may be provided.

. In the tank '2, a pairof fixed contact. mem- I bers 6 constitute the terminals for the conductors enteringlthe' interrupterthrough the insulators A movable contact member 7, I

having. contacts Slmounted thereon in registry with contacts 6,,issupportedby 1 ralityof supporting 'rods 9, of any suitable material, as, for example, insulated iron piping, wood or micarta.

A guide member ll, ofanysuitable material,' is mounted on. the cap member-*3. by i straps .14 and clamp 15. A brace-"16' (Fig.

spaced relation to guide 11, .as' well as to meansof a bracket 12, clamping bolts-13 9 i Secured to the cap 3 are a series of alined conduits 17, 18 housing a control rod 19. In the arrangement here illustrated, rod 19 extends to a plurality of circuit interrupters for simultaneous operation thereof. It is obvious that the length of the rod 19 may be changed for any other desired number of interrupters.

A suitable fitting 21 is attached to rod 19. A rocker arm 22 is pivoted, as at 23, to the fitting 21. (hie end of arm 22 is pivotechas at 21, to the bracket 12 and straps 14. The opposite end of arm 22 is provlded with a. head 24 for contact with a spring 25 that mounted, by means of a bracket 26, upon cap 3.

A link 27 is pivoted to the arm 22, as at 28, adjacent to the head 24;.

Pivoted between straps 14, as at 29, is a slotted. bracing link 31pivotally secured to link 27, as at 32. A bracket 33 is rigidly secured to bracket 26. Pivoted, asat 8 1, to bracket 33, are a pair of links 35 which are, in turn, pivoted, as at36, to aqheavy bifurcated member 37.

As shown in Fig. 5, member 37, is a specially braced link ofH-shape, the ends of which terminate in bifurcations 38, 39. Ends 39 are further bifurcated to form ears forpivots 36, and ends 39 are further bifurcatedfor attachment of the supporting rods 9 by fitting 40. Substantially midway of its length, member 37 is attached to link 31 by the pivot 41. i i

The operation of the link mechanism is best understood by following the movement of each part from the closed positions of the contact members 6, 7 and 8, asshown in Fig. 1, to their open positions, as shown in Fig. 3, Fig. 2 illustrating their. intermediate positions.

To open the contact members rod 19is actuated, in any desired manner, toward the right, (Fig. 1) with a corresponding movement of the pivot point 23. After a very short movement of rod 19, rocker arm 22 passes the dead-center line between pivots 23 and 2 1, after which the movement of the parts is acceleratedby the force of gravity and by the arc blowoutl forces.

,Movement of arm 22 causes link 27 to bear upon link 31, andthe latter, turningabout point 29, draws upon link member 37. The latter has a pivotal movement about point 36, as well as a translatory motion caused by the turning of links 35 about point 34. The result is to effect a substantially rectilinear movement of the upper end of the link 37 and the rod 9 connected thereto.

The rods 9 are guided by the members 11 and 16 so that an even break is made between or twisting of member 7.

The downward movementof the parts is terminated when head 24 strikes spring 25,

the latter acting as a shock absorber for the entire system.

To close thecontact members,rod 19 is. 3

moved to the left, Fig. 3, which, in turn, causes the parts to assume the position .shown in Fig.1.

It will thus be seenthatI have devised a quick posltlve-actmg control mechanism which is mgged in construction and yet the spirit and scope thcrcoflas set forth in the appended claims.

I claim as my invention: 1 i 1. In acircuit interrupter, a pair of fixed contact members, amovable contact member adapted to bridge said fixed contactmem here, a plurality of spaced supporting memhers secured directly to said movable contact i so member and disposed in a longitudinal plane thereof, andaseries of links for controlling said supporting members.

2. In a circuit interrupter, a pair of fixed contactanembers, a fixedguidemcmber extending between saidfixed contact members,

a movable contact member bridging said fixed contact members, a airof supporting members attached to sai member at: such a distance fromthe guide movable contact member as to prevent twisting of the'bridging member, said guide member being disposed between said supporting members and in a longitudinal planethereof, and a linkgvork for controlling said supporting memers. r 3. In a circuit interrupter, a movable contact member, a pair of spaced supporting rods secured directly to said contact memher, a bifurcated floating member for connecting said supporting rods in spaced relation, and mechanism foractuating the bi- N furcated member.

4. In a circuit interrupter, an actuating means, a link controlledby said actuating means, one end of said link being pivotally connected to the circuit-breaker frame, a second link secured to the free end of the first named link, a third linkpivoted to the circuit-breaker frame and controlled by the second named link, a bracket member secured to the circuit-breaker frame, afourth link secured to an end of said brackctmemher, a bifurcated member supported by the fourth-named link, said bifurcated member being actuated by movement ofthe thirdnamed link, a movable contact member,an'd supporting rods for sand movable contact er. i

member, a movable contact member, splurality of supportlng rods associated with member supported by said bifureatedmemboth sets ofcontacts 6, 8, without bending b 5. In a circuit interrupter, afixed guide I tion with a pair of fixed contact members,

sides thereof in a longitudinal plane of the contact member ,for moving said contact member and link mechanism for actuating said supporting rods.

"6t In a circuit interrupter,the combinaand a movable contactmember spanning [said fixed contact members, of a plurality of supporting. members secured at spaced intervals to said movable contact member in 'a longitudinal plane thereof whereby suspended therefromand connected to the bending and twisting of-the latter is prevented. o I

7.- In a circuit interrupter mechanism, a contact bridging member, a pivoted member, a plurality of contact-supporting members,

' bridging member in a longitudinal plane thereof, and means foractuating said pivoted memben. V

8.- In a circuit breaker, a bridging memnec ted thereto in spaced relation and in a longitudinal plane thereof, a floating lever; 'for actuating the: rods, pivotally supported at one end by a'pair of relatively Widelyspaced supporting members having their pivot shaft disposed parallel to the plane of the rods and pivotally engaging the said rods at relatively Widely separated points, to constitute a pivotal linkage capable of resisting side stresses Without appreciable deflection. a a s In testimony whereof, I have hereunto subscribed my name this 31st day of August, 192a r CHRISTIAN AALBORG.

ber, a pair of-supporting rods directly con:

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