US1220569A - Switch. - Google Patents

Description

H. A. STEEN.

SWITCH.

APPLICATION FILED JULY 25. l9l4.

RENEWED SEPT. 2 I. I916.

Ijutented Mar. 27, 1917.

HALFDAN A.

Original application filed September 6, 1910. Serial No. 580,532.

UNITED STATES FATE I T OFFICE.

STEEN, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO ALIIISCHALME BS MANUFACTURING COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION 01 SWITCH.

Specification of letters Patent.

Patented Mar. 27, 1917.

Divide d and this application filed July 25,

1914, Serial No. 853,166. Renewed September 28, 1916. Serial No. 123,966.

To allwhomz't may concern fi cation.

This invention relates in general to apparatus forinterruptmg electrical circuits, and

has particular relation tosuch apparatus of the type in which a magnetic field is utilized for extinguishing or suppressing the arc formed on the separation of the contacts.

It is an object of-this invention to provide. an -improved circuit-ln'caking apparatus; which is simple in construction and ellicient in operation.

It is a turther object of thisinvention to provide an ble of being real improved circuit-breaking ap-' nga blow-out magnet capadily detached from operat ve position topermit inspection and repairs-of the contacts or the parts of the magnet.

It is a furthcrobject of this invention to provide an improved ci rcilit-breakin{, apparatus embodyinga blow-out magnet rcmov.

ably held in source of current by a common means.

These and position and connected to a other objects are attained by this invention, the various novel :teatures of which w ill appear from the description and drawings, disclosing one embodiment of such invention and w1ll,be particularly pom-ted out in the claims.

In the accompam mg drawings:

Figure 1 is a side elevation of a switch embodying this invention, the switch as here shown being in closed position.

Fig. 2 is a I front elevationof a portion of the switch shown in Fig. 1.

Fig. 3 is a of Fig. 1.

In the embod sectional view of a detail of iii the plane of the line 3-3 iment of the invention illustrated in the drawings, there is mounted, upon a suitable baselO, a frame 11 of magnetic material of. a magnet 12. This frame,

which has three legs 13, 14, and 15, is secured to the base by bolts 16, and has a projection 17 which acts as a stop. The ma net 12 is provided with an actuating winiing 18 which core 1'; and

surrounds the middle leg or is adapted to attract a. switch actuating, member 19. This switch actuatmg member comprises two members 20 and 21, each of which is pivotally connected to the frame 11 as indicated at 22,and protures' 23 and 24 of said switch actuatin member into contact w1tlr their correspon ing engaging faces or surfaces 28 and 29, respectively. of the electromagnet. By means of this arrangenwnt the air gap be-- tween the an mture :21 and its corresponding attracting member is materially decreased from that of the ordinary arrangement and a steady and gradual pull of the'switch actuating mcirber is thus obtained. This is 30 apparent from the drawings, where it is seen that. af1er the part 20 has been drawn toward the. fixed part of the magnet a slight amount, the pin 25 of said part engages, the part 21 givingthis part an initial start, decreasing its air gap and making the pull of the magnet steady and gradual.

.Mounted in the lower portion of the actuating member 19 is the main brush 29.. preferably laminated, and adapted to en gage a stationary contact 30. which is located at the end of a support 31, the latter being secured to the base 10 by bolts 32. (lumped into contact with the brush 29. 'is a conductor 33, which is connected to a stud 34, the latter. forming one of the terminals of the switcln Located at the other end of the switch actu: ting member 19 is an auxiliary contact 35, which is adapted to engage, with a wiping ac ;ion, a relatively stationary contact member 36. This contact member is secured to a soring pressed member 36,, which is pivotally mounted, as shown at 37. The main contacts are arranged horizontally, breaking vtrtically, and the auxiliary contacts are arranged vertically, breaking hori-' zontally. hose contacts are placed at opposite ends of the switch actuating member 19,

" While the ordinary and intended operawith the auxiliary contacts above the'main contacts, in order to prevent any damage, which might occur to the main contacts due to arcs formed when the auxiliary contacts are separated. 4

In order to destroy arcs formed at the auxiliary contacts when the circuit is broken, a blow-out magnet 38 is employed. .he coil of this magnet is wound .on a spool 39 and its ends terminate in knife blade contacts 40 and 41, respectively, which are adapted to fit in contactsockets 42 and 42,, :s-shown in cross section in Fig. 3. The ctlnfizct sockets are suitably mounted, the S(X'-k(i:t; 42 being integral with or connected to a support 45, to which the contact carrying member 36. is pivoted and-which is secured to the base 10 by a bolt 46, 41nd the socket 42 being mounted separately or insulated from the support 45, and being. suitzibly connected to the line terminal 47. By using a construction such as this, the blow-out magnet is efficiently supported in operative position, and can be removed rapidly at any time simply by drawing out the blow-out magnet with its knife; blade contacts from the contactsockets 42, 42., It is thus seen that no screw connections are used md that the blow-out magnet can be removed rapidly without the use of any instruments. This blow-out magnet is provided as usual with poles 50 and- 51, which are so located that the flux between them is directly in thepath of arcs formed avhen the circuit through the auxiliary contacts is broken.

The securing bolt 32 is electrically connected to the bolt 46 through a conductor 48; and the spring-pressed member 36, is preferably} connected to, the support 45 through a 'fiexible connection 49.

The switch circuits will now be traced. Current enters'at the plus terminal 47, and passes through contact socket 42, knife blade 40, blowmut coil, knife blade 41, and contact socket 42.. At this point, the circuit divides, one branch including bolt 46, conductor 48, bolt 32, support 31, contact 30, brush 29,, conductor 33, and the minus. terminal 34. The other branch includes conductor 49, contact-carrying member 36,, auxiliary contact members 36 and 35, part 21 of the actuating member 19, conductor 33 and minus terminal 34.

It will be apparent that, in accordance with this invention, a circuit-breaking apparatus is )rovided in which a blow-out magnet is e -ciently supported in operative position by means of contact portions that are effective to connect the magnet coil in circuit, and can be readily detached from such operative position to permit free inspection and repair of the switch contacts and the parts of the blow-out magnet.

tion of the switch structure described does 'ing main anr engagement of the parts.

the present invention, such features being claimed in application, 'Serial No. 580,532, filed September 6, 191-0, of which application the present one is a division.

It should be understood that it'is not desired, to be limited to the exact details of construction shown and described, for ob vious modifications will occur to apers'on skilled in the art. I

It is claimed and desired to sec1|re-. l )y Let ters. Pa tent 1. In combination, a switch having fixed and how ble arts, said .movablepart carryl auxiliary contacts at opposite ends thereof, a cooperating main contact, and a cooperating pivoted auxiliary contact. 2. In a switch, an actuating member, a contact carried by said actuating member, a relatively stationary contactadapted to be engaged by said movable contact, and a 'blow-out magnet for destroying arcs formed on the separation of said contacts and having a detachable switch connection with one of said contacts comprisin conductive parts reinovably held together by the frictional 3. In a switch, an actuating member, a

relatively stationary contact member engageable by said movable contact, a blowout magnet for destroying arcs formed on sockets, said blow out magnet having contact portions'which are detachablyheld'in said contact socketsthrough the frictional .said latter contacts and the winding of said blow-out magnet, said connection consisting ofparts held together by the frictional engagement thereof. 4

5. In a switch, an actuating member, a

contact carried by said actuating member, a relatively stationary contact engageable by said movable contact, fixed-contactportions disposed adjacent said relatively stationary contact'carried by saidactuating member, a a

I the separation of said contacts, and contact contacts, and a blow-out magnet for destroying arcs, said blow-out magnet having contacts detachably retained-in yielding operative engagement with said fixed contact portions to maintain said blow-out magnet in operative position with its operating circuit established and to permit removal of said blowmut magnet from operative position by forcible withdrawal thereof.

(3. In combination.,a blow-out magnet comprising a core and a winding, and fixed contacts. the terminals of said winding being,

detachably held in engagement with said contacts through the frictional engagement of said parts, and said cooperative terminals and contacts forming means for detachably securing said magnet in position.

7. In combination with a circuit to be interrupted, a blow-out magnet comprising a core and a winding. the terminals of said winding being detachably held in engagement with portions of said'circuit through the frictional engagement of said parts.

b. In combination, a switch comprising fixed and movable contacts, and a blow-ont magnet comprising a winding, said magnet being detachably connectedin thc circuit controlled by said switch and supported in operative position through the terminals of said winding and being removablefrom operativ position by forcible withdrawal.

9. In combination with a switch, a blow-' out magnet comprising a core and a winding therefor, and means for removably retaining said magnet in operative position comprising a fixed contact'portion and a contact portion in electrical engagement with said winding, said contact portions being yieldingly retained in engagement through the frictional engagement of the parts.

10. In combination with an electrical eir cuit, a switch comprising fixed and movable contacts, a blow-out magnet comprising a winding, '11 )lnrality of additional contacts held in position adjacent the fixed contact of said switch, one of said additional contacts being electrically connected to one of saidswitch contacts and the other'of said additional contacts being connected to a terminal of said circuit, and contact portions in electrical engagement with said winding,

said latter contact portions being removably held in engagement with said additional coning, and fixed contacts, the terminals of said winding being adapted to frictionally engage and to be detachahly held by said fixed contacts, and said magnet being removably supported in operative position by the frictional engagement between said terminals and said con acts.

12. In combination with a switch, a blowout magnet having a winding with extending terminals. and a plurality of fixed contacts cooperative with said terminals, the frictional engagement between said terminals and said contacts being effective to support said magnet in operative position while permitting ready removal of said magnet by forcible withdrawal thereof.

7 13. In combination with a switeln il blowout magnet \aving a winding. and a fixed contact. said fixed contact and a terminal of said 'lllt ing being .det-achably held together solely by the frictional engagement between the parts. and -said magnet being supported in operative position, at least in part,througli said winding terminal and said fixed contact 14. In combination with a switch a blowout magnet, ind means for detachably supporting said magnet in operative position and connecti 1g the winding of said magnet in circuit, 5 iid means comprising contact portions'at ;he terminals of the windin and fixed contact portions cooperative wit the terminal :ontact portions,-certain of said contact porti ms being adapted to detachabl retain other'of said contact ortions throng 1 the frictional engagement 0? the cotiperative parts and to maintain saidmagnet in operative position In testimony whereof, the signature of the inventor is a ilixed hereto in the presence of two witnesses 4 HALFDAN A. STEEN.

\Vitnesscs WV. H. LIEBER,- J. J KANE.

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