Патент USA US2116983код для вставки
May 10, 1938- w. o. SCHULTZ 2,1 16,983 SWITCH CONSTRUCTION Filed Oct. 2, 1955 ' 3 Sheets-Sheetv l INVENTOR. BY A \ ORNEY. , May 10, 1938. w. o. SCHULTZ ‘ SWITCH CONSTRUCTION 2,116,983 Filed Oct. 2, 1935 3 Sheets-Sheet 2 // \ |I ' I NVENTOR. M%m @ MM? BY A ORNEY. May 10, 1938. w. o. SCHULTZ 2,116,983 SWITCH CONSTRUCTION Filed Oct. 2, 1935 5 Sheet's-Sheet 3 unm m IN VENTOR. Patented May '10, 1938 2,116,983 UNITED STATES PATENT FFICE 2,116,983. ‘swrrcn CONSTRUCTION William 0. Schultz, South Milwaukee, Wis., as signor to Line Material Company, South Mil waukee, Wis., a corporation oi‘ Delaware Application October 2, 1935, Serial No. 43,207 5 Claims. (Cl. 200-48) This invention relates to a switch construction and is particularly directed to a high voltage switch, such as a disconnecting switch, for in stance, although the invention is not limited to this type of switch. 5 ployed, that is to say, one having a plurality of member is carried within the tubular body por tion, the reciprmatory rod constituting the mov able contact and being projected into a yielding .tubular stationary contact which may be slotted Further objects are to provide a switch of the closed position, means being provided for auto matically guiding the movable contacts into posi~ tion so that they will engage the stationary con tacts in the proper manner.‘ ‘ Further objects are to provide a switch con struction in which means are provided for ?rst breaking the contact between the movable and stationary contacts and thereafter raising the switch arm, such means insuring the breaking 26 of any seal that may have occurred between the \ movable and stationary contacts without impos ing severe stresses on the mechanism, the sep "aration of the movable and stationary contacts occurring prior'to the actual rocking motion of the 30 or a plurality of main switch arms may be em played, in‘ which a tubular body portion is pro above outlined type in which although the arms oi the switch may be relatively ‘long, inaccuracies due to machining and other work do not cause lack of proper alignment between the movable and stationary contacts when the switch is in 20 _ In greater detail, objects of this invention are to provide a construction in which either a single Objects of this invention are to provide a con struction in which a multiple switch may be em— switch arms which are simultaneously actuated. 10 avoiding any inaccuracies due to machining and other work. switch arms. . - ' Further objects are to provide a construction in which a relatively light load is imposed dur ing the lifting of the switch arms, as there are no dragging contacts to be separated during this 35 motion, the separation of the movable and sta tionary contacts having been made automatically and prior to the lifting of the main switch arms, and to provide an auxiliary switch arm or guid ing member which cooperates with are horns to 40 maintain the electrical circuit after the sep aration of the movable and stationary contacts for the initial opening motion of the switch arms, so that, any arcing that might occur, will occur between the guide member and the arc horns, 45 such are horns and guide member being remov able and easily renewed and of relatively simple construction, the arc horns and guide member additionally acting'as guiding means for guiding 50 the movable contacts into position for engage ment with the stationary contacts, and the guide member itself also constituting a stopcooper sting with a portion of the stationary contact structure to arrest closing motion of the main .55 switch arms at the‘appropriate point, thereby vided and a movable reciprocatory rod or contact and which is springy and a?ords a secure and ex tensive engagement between the movable and sta tionary contacts. , Further objects are to provide a switch con struction in which a very simple and easily pro duced and easily renewable stationary contact is provided which is housed and protected from the weather, and in which the actual contacting por tion is easily renewable without dismantling the switch. Further objects are to provide a switch con struction in which the current does not pass through any of the bearing members or any of the joints, but is conducted directly from the movable and stationary contacts to the terminal 25 members. Further objects are to provide a novel form of switch construction in which the main switch arm is locked against rocking motion until after withdrawal of the movable contact from the sta 30 tionary contact, and in which relative motion between the stationary contact and the switch arm is prevented until the switch arm is again returned to its closed. position. Further objects are to provide a switch con 35 struction which is relatively simple, which is cheap to produce, which is eminently practical, and which is easy to operate. . A11 embodiment of the invention is shown in the accompanying drawings, in which: Figure 1 is a ‘side elevation of the switch con struction with parts broken away, the counter balancing spring being omitted for clearness. Figure 2 is a plan view of the structure shown 45 in Figure 1. , Figure 3 is a sectional detail of the movable and stationary contacts and adjacent portion. Figure 4 is a transverse sectional view on the line 4-4 of Figure 3. . Figure 5 is a horizontal sectional view on the 50 line 5-5 of Figure 1. Figure 6 is a fragmentary view of the joint por tion or hinge portion of one of the main switch arms, such view having parts broken away and 55 2 2,116,988 ' in section, such section being taken on the line 6-6 of Figure 2, the counter-balancing spring being omitted for clearness. Figure 7 is a fragmentary plan view of the structure shown in Figure 6, with-parts broken with slots 28. The slots 29 register with slots 23 formed in upwardly projecting webs 39 formed integrally with the member i5, as most clearly shown in Figures 6 and 7. ‘The portion 22 of the crosshead, see Figure 6, away and in section, such parts as are in section being taken on the line '|—-1 of Figure 6. is provided with a pin 3| that extends completely through the crosshead and into each of the pairs Referring to the drawings, it will be seen that the multiple switch is carried upon a supporting of slots 28 and 29, thus normally locking the members 21 to the stationary members 39 and consequently locking the movable switch arm '10 10 frame indicated generally by the reference char acter I and formed of channel iron or r-frame members, or other structural steel work. A plurality of switch units are- simultaneously operated and the operating mechanism for the 15 switch units may take the form of a crank or similar member indicated by the reference char acter 2 in Figure 5 and coupled to the individual rock levers 3 for the several switch units, as indicated in Figure 5, by means of a series of con 20 necting rods or links 4, 5, 3,1, and 8. The shaft 9 carrying‘ the crank 2, see Figure 5, may be operated by hand or automatically as desired and may be spaced as far away from the main switch mechanism as desired, to thereby provide for re 25 mote operation of the switch. For example, the switch may be externally located with reference to a power house, substation, or similar shelter, whereas the operating mechanism may ‘be located interiorly thereof, if so desired. 30 ' Theswitch units are duplicates and, as will be seen from Figure 1, an insulator stack I0 is pro‘ vided for the stationary contacts and a. widely spaced insulator stack ' II is provided for the pivoted end of the main switch arm I2, a rotary 35 insulator stack I3 being supported from each of the levers 3 so that rotation of the crank 2 or operating mechanism rotates the insulator stack l3. ' ' The insulator stack l3 carries a shaft i4 which 40 projects through the connector [5. The-connec tor l5 in reality forms a conducting member from the pivoted end of the main switch‘ arm I2 to the terminal lug or member l6. However, a flexible connector hereinafter described connects the ac 45 tive movable contact portion of the switch arm directly with the connector I5. If, however, the connector I5 is formed of a metal having a low conductivity, the ?exible connector may be ex tended to the terminal member IS in an obvious '50 manner. A'crank I’! is rigidly secured to the against rocking motion. However, when the cross head is retracted,v due to the operation of the crank H, the link l9 transmitting motion to the crosshead, it will be seen that the pin 3| slides rearwardly within the 15 slots 28 and 29 and ?nally when the pin is in alignment with the pivot pin 25, allows the con tinued pull on the link H! to rock the movable switch arm upwardly about the pivot pins 25, the slots 28 being then turned at an angle to the 20 slots 29. , When, however, the crank is reversely rotated to rock the switch arm downwardly, no relative motion can occur between the movable member 23 and the tubular portion I2 of the main switch 25 arm, as the pin 3| is locked against motion due to the fact that the slots 28 are now turned at an angle to the slots 29. No relative motion be~ tween these parts can occur until the main switch arm is in its lowermost or closed position, as in 30 dicated in Figure 1. Y i If desired, a. counterbalancing spring 32, see Figure '7, may be employed to offset the weight of the main switch arm. The spring has been omitted in Figures 1 and 6 for the sake of clear- , ness. The insulator stack It) carries the stationary contact member which consists of a tubular contact portion 33 provided with a plurality of saw-cuts 34 so as to split it into a plurality of ?ngers, as shown in Figures 3 and 4. .These fingers have outwardly turned ends 35 and the extreme inner end of the movable contact rod or member 23 is ‘slightly bevelled to facilitate entry of this movable contact member into the 45 stationary contact member. If desired, the re silient gripping of the tongues may be increased by encircling spring clips 36. These spring clips I have been shown ?at in Figures 3 and 4. but very obviously they may be ‘formed in-each instance shaft l4 in any suitable manner and is connected - with a. helix of spring wire with its ends joined. by means of a universal joint indicated generally at l8 to the link orconnecting rod l9. The outer end of the link or connecting rod I9 55 is joined by means of a universal joint 20 with a crosshead 2|. The crosshead 2| has the up wardly projecting ears, as shown most clearly in .Figures 2 and '1, between which the universal joint is pivotally carried.v This crosshead ex 60 tends downwardly and has a reduced or narrowed portion 22 into which the movable contact mem ber or rod 23 is ?rmly screwed. This rod or movable contact member 23 forms a portion of the main switch arm I2. 65 > In reality this main switch arm is of tubular construction, as very clearly shown in Figures 1, 2, 6, and 7. The inner end of the tubular arm I2 is screwed into the pivot yoke 24, the tubular member l2 being preferably provided with a 70 bushing’ and guide l2’, see Figures 1,2, and 3, screwed on to the end of the tubular arm l2. The yoke 24 is pivotally carried on pivot pins 25 screwed into ears 26 formed integrally with the member I5. This yoke 24 also includes a 75 pair of inwardly spaced parallel arms 21. provided Any suitable encircling spring member can be used. ' The contact member 33 is screwed into an end cap 31 which in turn is screwed into the tubular portion 38 of the terminal casting 39. This ter- 1 minal member or casting 39 is provided with a terminal tab or lip 49. It is to be noted from Figure 4 that the terminal member 39 is pro vided with outwardly projecting apertured ears 60 4| which receive the portions 42 of the arc horns, such are horns being provided with downwardly turned inner portions 43. These arc horns are readily removable and are held in place by means of set screws 44 so that they may be renewed when they are worn. A stop 45 in the form of a switch blade is car ried by a split collar 49 clamped around the tubular switch arm l2.- This stop when the switch is in closed position, contacts with the 70 stationary terminal member 39 and holds the movable switch arm in its lowermost position. Further, this stop 45 passes into the space be tween the arms 43, see Figure 4, of the arc horns, preferably bevelled portions 43’ being provided 75 2, 1 1 6,983 - to assist in guiding the arm or stop 55 into place. Thus it will be seen that the stop member 45 is guided by the arc horns and is arrested in its lowermost position by the stationary terminal member 39 and this serves to align the movable contact member 23 with the stationary contact member 33. Any inaccuracies in machining will not interfere with the automatic and correct aligning of the stationary and movable contact 10 members, as this is done in the manner here inabove described. It is to be noted particularly from Figures 6 and 7 that a ?exible connector 41 is bolted se curely to the crosshead 2! and to the connector ' or bearing member l5. Inasmuch as the slidable or movable contact member 23 is tightly screwed into the crosshead, it is at once evident that a very good electrical connection is aiiorded direct ly from the terminal member Hi to the movable 20 contact member 23. The operation of the switch is as follows: Assuming that the switch is closed, it is ap parent that rotation of the crank or operating member 2 rotates the insulator stack l3 and con sequently the cranks I‘! of each of the switch units. Inasmuch as the switch units are dupli cates, a- description of the operation of one will, of course, suffice. As the crank l'l rotates, it draws the link l9 rearwardly and consequently slides the movable contact rod or member 23 rearwardly out of engagement with the station ary contact 33. After the movable contact has cleared the stationary contact, the pin ill, see Figures 6 and 7, is in alignment with the pivot pins 25 and consequently the yoke 2t and the movable switch arm B2 are now free to rise upon continued pull of the link 89. When it is desired to close the switch, reverse rotation of the crank rocks the switch arm 40 downwardly to closed‘position. Motion of the movable contact member is prevented as the slots 28 and 2a are not in alignment until the movable switch arm 52 has arrived at switch closed posi tion. Thereafter continued forward motion of the link l9 causes the movable contact rod or member 23 to pass into and engage the station ary contact 33. It will be seen that there is no lifting motion required or permitted until the movable contact has been withdrawn from the stationary contact and consequently there are no dragging loads imposed on the main switch arm during its up ward motion. ' , Further, it will be seen that after the movable contact member has been withdrawn from the‘ stationary contact member, that electrical con tact is still maintained through the auxiliary switch blade or stop member 45 and the arc horns, and further that these members are the last ones in contact and any arcing that occurs, occurs between these members. They are readily renewable and may be easily replaced without dismantling the switch. Also they are of inex pensive and simple construction.’ The stationary contact for each switch unit is housed in its own hood or casing and is thus protected from the weather. Any seal that may, form between the movable contact and the sta tionary contact is broken by the direct longi 70 tudinal motion of the movable contact member without imposing any strains on the main switch arm. ~ _ It- will be seen further that if wear should occur on the stationary contact members, they may be readily renewed as the end cap 31, see Figure 3, may be unscrewed and a new station ary contact member may then be substituted for the old one. Further than this, the movable contact member 23 can easily be renewed, as it is merely necessary to unscrew it from the yoke, see Figure 6. > Further it will be seen that a very reliable, serviceable and simple type of switch has been _ providedby this invention which is cheap to manufacture and which is relatively easy to operate. 1" Although this invention has been described in considerable detail, it is to be understood that such description is intended as illustrative rather than limiting, as the invention may be variously 15 embodied and is to be interpreted as claimed. I claim: 1. A switch comprising a stationary main por tion, a switch arm pivotally mounted on said main portion, a reciprocatory movable contact 20 guided and carried by said switch arm, a cross head connected to the rear portion of said mov able contact and reciprocable relative to said switch arm, a stationary contact adapted to re ceive the outer end of said movable contact, said 25 stationary main portion and said movable switch arm having co-related aligning parts, means in dependent of said contacts and actuated by said crosshead for locking said co-related parts in alignment until said movable contact has been 30 withdrawn from said stationary contact, and means for moving said crosshead to‘ reciprocate said movable contact and rock said switch arm. 2. A switch comprising a stationary main por tion, a switch arm pivotally mounted on said main 35 portion, a reciprocatory movable contact guided and carried by said switch arm, a crosshead con nected to the rear portion of said movable con tact and reciprocable relative to said switch arm, a stationary contact adapted to receive the outer 40 end of said movable contact, said stationary main portion and said movable switch arm having co related aligning parts, means independent of said contacts and actuated by said crosshead for lock ing said co-related parts in alignment until said 45 movable contact has been withdrawn from said stationary contact, and means including a crank and link mechanism joining said crank and said crosshead for reciprocating said crosshead and for rocking said switch arm. , 50 3. A switch comprising a stationary main por tion having a stationary member provided with an elongated slot, a switch arm pivotally mounted on said main portion, a reciprocatory movable contact guided and carried by said switch arm, a crosshead connected to the rear portion of said movable contact, a stationary contact adapted to receive the outer end of said movable contact, said switch arm having a portion adjacent the pivotal end thereof provided with an elongated 60 slot aligning with said ?rst mentioned elongated slot when said switch is in closed position, said crosshead having a projecting portion ?tting within both of said slots to normallylock said switch arm to said stationary main portion while 65 said switch is in closed position, said crosshead being free to reciprocate while said slots are in alignment to thereby cause relative motion be tween said movable contact and said switch arm, and means for drawing said crosshead rearwardly to place said projecting portion in alignment with the pivot point of said switch'arm, said means thereafter rocking said switch arm, the portion of said switch arm havingthe slot rocking at an angle to the first mentioned slot. ‘ . 75 4 a,11s,oss i 4. A switch comprising a stationary main por tion having a rigidly mounted stationary member provided with an elongated slot, a switch arm having a yoke pivoted to, said stationary member and having a slotted portion rigid with said yoke with the slot normally aligning with said ?rst mentioned slot when said switch is in closed posi tion, an arm projecting from said yoke and form ing a portion oi! said switch arm, a stationary con be:- provided with a pair of spaced webs rigid therewith and provided with elongated slots, said stationary member having a pair 01' spaced pivot pins, a switch arm having a yoke pivotaliy car ried by said pivot pins, said yoke having elongated‘ slots aligning with the elongated slots in said webs when said switch arm is in switch closed po-‘ sition, 'a stationary contact, a movable contact adapted to engage said stationary contact, and movable‘ with respect to_said switch arm, a yoke 10 10 tact, a movable contact member movably carried by said arm and adapted to engage said station _ operatively connected to said movable contact ary contact, a crosshead operatively coupled to and having pins projecting through all oi’ said said movable contact for withdrawing said mov slots, said pins preventing rocking oi’ said switch able contact irom said stationary contact and pro vided with a pin ?tting within both of said slots, and means for drawing said crosshead rearwardly to withdraw said movable contact from said sta tionary contact, said means when said crosshead with said stationary contact, and means for draw 15 ing said crosshead rearwardly and sliding said pins into alignment with said pivot pins, said is in its ?nal retracted position aligning the pin 20 thereof with the pivot point of said yoke, said switch open position and causing the slots of said yoke to position themselves at an angle to the 20 '15 means thereafter rocking said switch arm to switch open position. 5. A switch comprising a main stationary mem arm while said movable contact is in engagement means thereafter rocking said switch arm to slots of said webs. ’ WIILIAM O. SCHULTZ. '