US1689851A - Circuit breaker - Google Patents

Description

Oct. 30, 1928.

A. H. BAKKEN CIRCUIT BREAKER Original Filed July 9. 1921 4 Sheets-Sheet l INVIENTOR firid'ew hf Hakka/1. BY

WITNESSES:

Oct. 30, 1928. 1,689,851

A. H. BAKKEN CIRCUIT BREAKER 9 4 Sheets-Sheet 2 Original Filed July 9.

INVENTOR ATTORNEY ..Oct. 30, 1928.

A. H. BAKKEN CIRCUIT' BREAKER Original Fiied Jdi 9, 1921 4 Sheets-Sheet 5 INVENTOR find/8w H. Bakke/z BY WITNESSES:

ATTORNEY CIRCUIT BREAKER Original Filed July 9. 1921 4 Sheet;-Sheet 4 2@2 1; I OI I I '1 1 5...: 3) 3/ WITNESSES: INVENTOR ATTORNEY Patented Oct. 30, 1928 UNITED, STATES nousn ELECTRIC VANIA. j j

Jul 9, 1921, Serial My invention relates to electrical circuit breakers and more particularly to operating mechanism therefor and their supporting structures. I Oneof the objects of my invention is to simplify and to reduce the costof constructionof circuit breakers, with special refer: ence to those of thefluid-immersed type. Another object of my invention is to so form certain portions ofthe circuit breaker that-they may be stamped out of sheet metal, thusavoiding the necessityof employing an unnecessary number of cast metal parts and eliminating the machining operations which have been heretofore deemed necessary. v Another object of my invention is to provide a circuit breaker in which a maximum effectiveness ofoperation is secured at a minimum cost of construction.

As shown in the accompanying drawings: ,Fig. 1 is a view,wparti.ally in side elevation and partially in section, of a circuit breaker constructed in accordance with my invention,

and taken on the line II of Fig. 2.

Fig. 2 is a view, partially in top plan and partially in section, ofthe'device of Fig. 1. Figs. 3 and 4 are plan and side elevational views respectively, of the quenching fluid. tank employed by me. Y i

Figs. 5 and 6 are plan and side elevational views, respectively, of the supporting frame work for the circuit interrupter mechanism and the tank Figs. 7 and 8 are detail views of the toggle lever embodied in my invention.

Fig. 9 is a detail view of the main operating lever shown in Fig. 1. p a

Fig. 10 is a side elevational view of a cross bar and the lifting rods carried thereby, showing in end elevation, the movable con tact or bridging members, and Figi ll is view of'the lower portion of Fig. 10, taken at right angles thereto.

I provide a' supportingframe 12 composed of a base portion 13, bracing members 14: and bracket members 15. The bracket members 15 are provided withlug portions 16 by means of which they are riveted to the members, 1.3 and 14. All of these membersare of stampedmetal. The members 14 are pro- PATENT OFFICEL,

ANDREW H. BAKKEN, OF EDGEW'OOD PARK, IEENNSYLVANIA, ASSIGNORTO WESTING-l & MANUFACTURING COMPANY, A CORPORATION OF PENNSYL- CIRCUIT BREAKER;

No. 483,384. Divided and this Vided with holes l ah which bolts may extend, to secure the apparatus to a panel board or wall.

13 is also provided with three openings 22.,

The base portion 13 is provided with 5 m through which lifting rods 23 .extend,and

with openings 24 through which porcelain members 25 extend. i

The lifting rods 23are preferably of wood and at their upper ends are clamped between cross bars'26, of peculiar form; by means of bolts '27. This manner of holdingthe rods is an improvement on the former practice wherein a single perforatedholding member wasprovided into which the end of the rod was inserted and the material then swaged inwardly around the reduced portion of the rod. y i

Besides effecting. a more convenient and secure connection between the holding member and the rods, my construction eliminates theobjectional tendency in theformer construction towards the breaking and splitting of the ends of the rods. 7 The three lifting rods 23 are operated as a unit, through a' main operating lever28 that bars26. f

Eachof the rods 23 carries, at its lower end, a bridging member 30 that consists oftwo contact portions 31, cl amped together as indicated in Fig. 11 and keyed to the lifting rods 23 to prevent rotation with respect thereto The contactfaces 31 of the bridging member 30 are adapted to make engagement with has pivotal connection at 29 with thecross stationary contact members 32 that are yield- V ingly supported on conductors 33 which p'ass through theporcelain members 25 and are provided at their upper ends with termin'als 34:.

The porcelain members25 serve as insulators and as supports for the conductors 33 and the partscarried thereby. The lower ends of the porcelain members and the co-acting enlarged portions of the conductors 33 are of semi-cylindrical form, in order that the porcelains and the conductors will be nonrotatable with respect to each other.

The stationary contact members 32 are supported from the conductors 83 by flexible members 35, and shunt connections 36 serve to conduct the current from contact members 32 to conductors Leaf springs 37 normally force the contact members 32 toward each other, and into close engagement with the movable contact members 31. By reason of the fiexible mounting of the contact members 32, they automatically align themselves with the contact faces of the members 31.,

The porcelain members 25 are enlarged at their middle portions, as shown more clearly in Fig. 1. This enlarged portion is clamped between the under-side of the base member 13 and a flared plate 40, in the manner shown in Figs. 1 and 2.

The tank 19 is of pressed metal and is provided with an insulating lining 41 of any suitable insulating material. Partitions 42 of insulating material are also provided between each pair of conductors 33 and the live parts associated therewith, in order to thoroughly insulate the respective sets of contact members from each other.

The tank 19 is adapted to contain fluid for quenching arcs that may be formed duringthe operation of the circuit breaker.

The bolts 18 are secured to the corners of the tank, as shown in Figs. 3 and 4, by means of rivets 18". This construction eliminates the necessity of riveting perforated blocks to the sides of the tank, for the purpose of supporting the bolts 18.

It will be understood that each of the three rods 23 carries at its lower end a bridging member 30 that has contact members 31 adapted at, their opposite ends, to engage stationary contact members carried by two of the conductors 33, to complete a circuit across such conductors. It will be apparent that the flared walls of the openings in the base member 13 and the flared openings in clamping plates 40 are yielding and of such form, and co-act with the enlarged portions of the porcelains 25 in such manner, that any irregularities in engaging surfaces maybe automatically compensated for and the porcelain thereby properlyaligned and tightly embraced between the clamping members and the base member. I

The operating lever 28 is pivotally con nected at 29 to the pair of cross bars 26, and at its opposite end it is pivotally supported on the brackets 15' by a pin 45. As the lever 28 is moved about its pivot 45, it raises and lowers the lifting rods 23 and the contact members 31 carried thereby, to open and close the circuits. A toggle lever 46, that is pivotally supported on the brackets 15 by a pin 47, pivotal'ly supports a link 48 that is connected to the operating lever 28 by a pin 49.

An operating rod 50 is connected to the toggle lever 46, by a pin 60, that extends through slots 61 in the brackets 15. As the operating rod is moved, motion is transmitted through the toggle lever 46 and the link 48 to the operating lever26. In the normal operation of the device the operating rod 50 is moved upwardly to close the circuits-in the manner heretofore described and locked in such position by any desired means. Upon release'of the operating rod 50, a pair of tension springs 52, each of which has one end secured to the pin 49 and its other end securedto the pin 47, serve to return the moving parts of the apparatus to open position and thereby break the circuits.

The toggle link 46 is provided with perforated extension 54, 55, and 56 so that the operating rod may be operated from any desired direction. For instance, in the form illustrated herein, the link 48 and the rod 50 are connected to the extensions 55 and 56 respectively, whereas if it be found necessary to place the rod 50 in a'horizontal position it may be connected to the extension 55 and the link 48 to the extension 54 while to operate the rod 50 downwardly from the extension 56 and from beneath the lower member 14, the extension 54 could be connected to the link 48. If the range of movement of the rod 50 were limited, it could be connected to the extension 55 and the extension 54 connected to the link 48.

Various changes in detail and general arrangement may be made without departing from the spirit of the invention as shown in the accompanying claims.

I claim as my invention:

1. The combination, in a circuit breaker, of an operating lever, bridging members, lifting rods having end portions whose cross-sectional areas increase outwardly along their axes, stationarycontact members, clamping members for the lifting rods cooperating with the end portions, and means for connecting the operating lever to the clamping means. i

2. The combination, in a circuit breaker, of an operating lever, bridging members, lifting rods having end portions whose crosssectional areas increase uniformly outwardly along their axes, stationary contact members, clamping members for the lifting rods cooperating with the end portions, and means for connecting the operating lever to the clamping means.

3. The combination, in a circuit breaker mechanism, of a supporting structure therefor, a movable contact member, a perforated insulating member secured to the said structure, a conductor disposed within the insulating member and supporting a contact adapted to engage said movable contact, said insulator having an end face which is eccentric to the axis of the hole contaming said conductor, and said conductor having a shoulder adapted to engage said face.

and clalnpin end portions.

In testimony whereof, I have hereunto sub- 10 scribed my 11 1 924:.

g means co-operating with the aine this 25th day of November,

ANDREW H. BAKKEN.

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