US1584655A - Switch - Google Patents

Description

May 11 1926. 1,584,655

E. E. ROSE SWITCH Filed Dec. 3l, 1921 2 Sheets-Sheet l WITNESSES INVENTOR @lj-56 Fly. I.

'gwardE. Rose.

TTORNEY May l1 1926. 1,584,655

E. E. ROSE SWITCH Filed Dec. 31,'1921 2 sheets-sheet 2 1' WFTNESSES INV ENTOR ,f/liwv. Edward 5.50.56.

ATTORNEY FATE@ i. @iiFlQliM EDWAR) E. ESSE, OF EBGEEGGD FARE, PENNSYLVANA, ASSGNQR T0 WESTNG- HOUSE ELECTRIC 85 MANUFACTURING CQMEANY,

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A. COBECRATON 0F PENNV SWITCH.

Application filed December 31, 1921.

My invention relates to switches and it has particular relation to switches adapted to carry relatively heavyy currents.

One object ot my invention is to provide an improved seating device for a movable' contact member that isy adapted to bridge two stationary contact members. i

Another objectof my invention isyto providean improved vswitchV having a main contact device for rnornfialiy carryingl thev majorrkportion or" thecurrent that traverses the `switch and an auxiliary. contact device. that is ,l employed to interrupt the circuit in which the switch is located.

Briefly speaking, my invention, in one aspect, consists in providing a flexible coupling between a bridging contact member and the means by which it is actuated.

For` a. better understanding ol' my invention, reference may be made to the accompanying drawings,

.Figure 1 of which isa view, partially in side elevation, and partially in section, of a switch constructed in accordance with my invention Figs. 2- to 9, inclusive, are detail views oit parts of the switch that, is illustrated in Fig. 1 of the drawings; and

Fig. 10 is a diagrammatic View, illustrating the manner in which the various contact members of the switch illustrated in Fig. 1 are connected.

Referring particularly to Fig. 1 olf the drawings, a switch 1 comprises a plurality of vertical mounting bars 2, to which are secured the various portions ot the switch, hereinafter more fully described.

A plurality o1 stationary contact members 8 and l may be bridged by a movable contact member or brush shunt v5, which may be actuated by a piston 6, the piston beingv mounted within a cylinder 7. The'stationary contact members 3 and lv andthey movable contact member .5' normally carry-substantial-ly' all of the current; traversing'.: the .l switch ,1.

A-plulaltv @fertiliser Contact ,members 8 andy 9 are lemployedvto interrupt the our;v rentwbch normally. traverses.- -hezmanconv tectmember 5, thereby preventing @eine between the Statier1-arry Contact 11.1,@ .leere and tanflftheflnebiere-Q. a Y Y @beianalisti'rcontastznieoiber Serial No. 526,348.

positeside ci theswitch--by means'oi al bracket member 18, of which the stationary contact member l constitutes a part., The movable auxiliary contact member 9 is securely mounted upon a contact-holding member 19 by means oi a tap bolt 21. The

tap bolt 21 also serves to attach an are horn 22 to the holding member 19.

The contact-holdimgY member 19 is pivotal-r ly mounted upon a rocker arm 23 by means of a bolt 24. The contact-holding 'member 19 and the rocker arm 23 are biased in predetermined angular .relation by means oic a pivotally-mounted rod 25 and a resilient member or spring 26 which is mounted thereon and positioned between the contactholding member 19 and the rocker arm 2?).

The rocker arm 23 is pivotally mounted upon a rod 27 by means of a bolt 28. The rocker arm 23 is also pivotally connected to a stationary supporting member 29 by means of a bolt 31. The rod 27, which is further illustrated in Figs. 8 and 9, is mechanically connected to the piston @by means of a piston rod 32 and a coupling member 33.

The movable cont-act member 5, which is commonly termed a brush, comprises a plurality of sheets of conducting; material, such, for example, ascopper, which are bound together by means ola plurality of blocks 35 and 36 and bolts 87.

A*lower-spring-holding lmember 38, havinga threaded portion 39 to adapt it to tit inthe block 36, which is best illustrated inV Figaro and-k7 of thedrawings, is alsovpro-V videdk Jwith aV spiral groove .el and a socket oncavity 42a. (Seevv Figs. l and, 5.)

in upper sprrelheldee member, 4,2. ,ie Provfl--v @d with; @threaded .Cavity-43,1whereby"the member e2 is adaptedto be mounty V(it) thc rod member 27, which is best illustrated in Figs. S and 9 oic the drawings.

The upper spring-holding` member 42, which is best. illustrated by Fijn Q and 3 of the drawings, is also provided with` a spirally-wound groove lll. A i"\l.f1tirely Vhat annular plate il is mounted upon the rod 2i', above the spring-holding' member 4Q. The plat-e l5 is maintained in engai ent with the spring-holding member by means ol" a nut 46. A projection 4S o'' the member l2 is adapted to lit into the socket 42 of the member 38 and a resilient mem* beror spring` il? is wound upon both ot the spring-holding members 3S and in the spiral etrooves 4l and la respectively and. is ot' sr ".cient strength to securely bind the members 38 and 42 together. The springholding:T members 3S and and the spring` t? are thus so arranged as to form ay ballL and-socketI joint between the rod 27 and the main contact member lllhen tluid pressure is applied to the piston G, the force is transmitted thereby through the piston rod 39', coupling 33, rod 27 and the springliolclingj member in to the spriiig-holding;` member 38, and, thc-nce, 'to the block 3T and main contact member 5. The projection 48 ot the spring-holding member l2 is adapted to lit in the cavity ot the lower springihholding` member 38 to permit movement oit the main Contact member 5 in any direction. rlhe springl t, surrounding the spring-holding members 3S and 4t2, tends to resist any rockingmotion otI the main Contact member 5 but permits suiiicient movement thereo;t to allow the main Contact member to properly seat itself upon the stationary contact members 3 and llllhen the piston (l actuated downwardly, a portion ot the torce` transn'iitted to the rod QT employed to actuate the rocker arm until the auxiliary contact finger 9 is brl'iug'ht into c` rement with the auxiliary stationary Contact .linger S.

rlhe parts ot the switch l are so desi 'ned that the auxiliary Contact iiiiger 9 eni icjes the auxiliary Contact finger 8 prior to the bridging' ot the stationary cont-act members 3 and 4l; by the main contact member lllhcn the piston G is actuated upwardly, the main Contact member Vfirst separates trom the stationary contact members fl and ll, and, later, the movable auxiliary contact member 9 becomes disengaged trom the auxiliary stationary Contact member 8.

The arc. established upon the separation of the auxiliary Contact members 8 and 9 is blown outwardly upon the upper and lower arc horns of? and l5, respectively, by means ot a blow-out device comprising` the previously-inentioned blow-out coil 13 and core member lit, and a plurality ot pole-pieces #19, which are magnetically connected to the core member 14;. i

The pole-pieces 49 are securely attached to the sides of an arc box 5l. The arc bos 5l is pivotally mounted upon a cylindrical bracket men'iber 52 by means of a supporting;v member rlhe top ot the arc box :7l is provided with a flange member 5l, which is secured to a bracket member by means o t a connectiirg` member and bolts 5T and 5S.

Movement otl the piston (i is governed by means oi an electroniagnetic valve device 5), which is well understood in the art and need not be described further than to say that it `governs the admission and release ot air to the cylinder T. 'lhe piston 6 is biased to its upper position by means of a relatively powerl'ul spring (il, only the upper portion ot which is illustrated.

Referring now to Fig". l0 of the drawings, it illustrates the manner in which the stationary Contact terminals l are connected to the auxiliary stationary` contact member S by means ot the blow-out coil i3 and to the stationary Contact. member S. The stationary contact terminal 17 electrically connected to the auxiliary movable contact member 9 by means ot a conductor (S2 and to the stationary contact member l by means ot the bracket member 1S.

The purpose oi.' the dieeram ot Fie'. l0 is Uhl.

to show how a circuit comprising the terminals 1G and l? ot the switch established when the auxiliary contact nien'ibers S and 9 are in engagement or when the main Contact member 5 bridges the stationary contact members 3 and 4i.

From the above description, it is apparent that l have provided means 'for so mounting a. Contact device that is adapted to bridge two stationary Contact members, that the contact device m y be rocked in any direc tion to permit proper seating; olf the device upon a plurality ot.' stationary contact members, thereby avoiding poor electrical connection between thev movable contact device and the stationary contacts when their adjacent surfaces become unevenly worn.

lllhile l have illustrated a switch in its preferred form.v it is apparent that minor modifications may be made in the arrangement and construction ot the parts ot the switch without departing: from the spirit thereot. l desire, therefore, to be limited only by the scope et the appended claims.

l claim as my invention l. A switch comprisingl in combination a plurality ot stationary contact members, a movable contact member adapted to bridge said stationary contact members, means disposed to a-ctuate the movable contact member, the actuating means and contact member being,l adapted to provide 'for the transmission ot an evenly distribute-d pressure to the Contact member in a plurality of ditferent positions, and resilient means for rctaining the contact member in engagement lllll fil) with the actuating means, said resilient means being adapted to permit the seating of the contact member in different positions.

2. A switch comprising in combination, a plurality of stationary contact members, a movable contact member adapted to bridge said stationary contact members, means disposed to actuate the movable contact member, and resilient means for retaining the contact member in engagementwith the actuating means adapted to permit relative movement to provide :tor the seating o1E the contact member in different positions, said actuating means and contact member being adapted to maintain contact through a substantially constant area to provide for an equal distribution ot pressure on the contact member in diierent positions.

3. In a switching device, the combination with a plurality of relatively stationary contact members and a movable contact member for bridging said stationary contact members, said movable member having a cavity therein, of means having a knob-like projecting portion adapted to it in said cavity for actuating said movable member, and a resilient member surrounding said knob-like projection and attached to said movable contact member.

4:. A switch comprising in combination, a plurality of stationary contact members, a movable contact member adapted to bridge said stationary contact members, means disposed to actuate the movable contact member, and resilient means for retaining the contact member in engagement with the actuating means adapted to permit relative movement, said contact member and actuating means being adapted to provide for the oscillation of the contact member in all directions and to maintain engagement throughout al substantially constant area.

A switch comprising in combinati-on a plurality of stationary contact members, a movable contact member adapted to bridge said stationary contact members, means dispose-d to actuate the movable contact member, .and resilient means for maintaining the contact member and actuating means in operative relation, said actuating means and contact member being provided with complementary engaging faces adapted to permit the oscillation of the contact member in all directions to eiiect the seating of the contact member in diiier-ent positions.

6. A switch comprising in combination a. plurality of stationary contact members, a movable contact member adapted to bridge said stationary contact members, means disposed to actuate the movable contact memb-er, said actuating means and contact member being provided with curved engaging faces adapted to permit the movement ot the contact member in substantially every direction to take dilierent positions for the bridging of the contact members, and means for retaining the contact member in operative relation with the actuating means.

7. The combination with a movable member and an actuating member, of a helical compression spring which secures said movable member to said actuating member.

8. In a .switching device, the combination with a movable member and an actuating member, of a compression spring, which secures said members the one to the other.

9. In a switching device, the combination with a movable member provided with a groove and an actuating member having a groove, of a compression spring so positioned in said groove as to fasten said members together.

lO. A switch comprising in combination, a plurality of stationary contact members, .a movable contact member for bridging said stationary contact members, means disposed to actuat-e the movable contact member, said actuating means and movable contact member being provided with curved engaging` faces adapted to permit the movement of the contact member in substantially every direction t-o take different positions for the bridging of the contacts, means for retaining the contact member in operative relation with the actuating means, and arc horns electrically connected with said first mentioned contact members, one of said arc horns being operated by said actuating means.

In testimony whereof, I have hereunto subscribe-d my name this 29th day of November 1921. l

EDWARD E. nosa."T

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