Патент USA US2367090код для вставки
Jan. 9, 1945. T. BIRKENMAIER 2,367,090 ELECTRIC SWITCH Filed Oct. l5, 1942 H6125 ß 3 Sheets-Sheet l Jan. 9, 1945. T. BlRKENMAlER 2,367,090 ELECTRIC SWI TCH Filed Oct. 15, 1942 3 Sheets-Sheet 2 Jan. 9, 1945. T. BIRKENMAIER 2,367,090 ELECTRIC SWITCH Filed oct. 15, 1942 4 FIGBì 29 a 27 M_ l? en „7 /Z 2f 8/ /5/09/0557 3 Sheets-Sheet 3 Ratented Jan. 9, 1945 2,367,090 UNITED STATES PATENT OFFICE 2,367,090 ELECTRIC SWITCH Theodore Birkenmaier, St. Louis, Mo., assiznor to W. N. Matthews Corporation, St. Louis, «Mo., a corporation of Missouri Application October 15, 1942, Serial No. 462,179 6 Claims. I (Cl. 200-126) This invention relates to electric switches,- and with regard to certain more speciñc features, to repeating electric fuse switches. The invention is an improvement upon the type of construction shown in my United States Pat 2, and wings 4 serving as weather guards. Each also has a cam surface 11 leading into a socket 19. ~ The hoods I9, 2| and 23, along with the struts Among the several objects of the invention may be noted the provision of/a foolproof repeat ing fuse switch having a simple, compact, reliable and enclosed structure for providing time~delay action between successive circuit reclosures; and I1 pivot as a unit upon said bearings I3 and, in order to assure electrical transmission between the bracket 5 and the arm I5, braided copper wire> 25 connects the two. This wire allows for free relative movement between the members 5 and I5. A tension spring 21 reacts between an eye 29 the provision of a switch of the class described carried on the arm I5 and an eye 3I carried on ent 2,240,253, dated April 29, 1941. which, despite the time-delay features, effects snap-action circuit reclosure through successive ly operative fuse holders. Other objects will be the bracket 5. in part obvious and in part pointed out herein after. The invention accordingly comprises the ele ments and combinations of elements, features of construction, and arrangements of parts which will be exemplified in the structures hereinafter described, and the scope of the application of which will be indicated in the following claims. In the accompanying drawings, in which is i1 lustrated one of various possible embodiments of The line C-L of axial tension of this spring 21 passes beneath the pivot I3, there by tending to bias the arm I5 downward. The maximum downward position that may be as sumed by the arm I5 is determined by lugs 33 on the arm I5 cooperating with adjustable stops 35 on the bracket 5. 20 ' On the lower end of the insulator 3 is a bracket 31 held in place by means of a saddle piece 38 and screws 39. This bracket also carries openings such as 9, one of‘which receives a line wire connector II. The bracket 31 carries three pairs of arms enumerated respectively as 4I, 43 the invention, and 45, arranged in descending order by pairs as Fig. 1 is a side elevation of the switch shown indicated in Figs. 1 and 2. Each pair has sup in closed position and ready for operation; porting slots 41 for gudgeons 49 of fuse holder Fig. 2 is a right-side elevation of Fig. 1; assemblies indicated at A, B and C, respectively. Fig. 3 is a fragmentary horizontal section taken 30 Each fuse holder assembly A, B and C is con on line 3-3 of Fig. 1, but reversed in position; stituted by an insulating fuse tube 5I carrying an Fig. 4 is a vertical section taken on line 4-4 upper conducting head 53 into which is screwed of Fig. 2i a round-nose conducting cap 55. Each cap 55 Figs. 5 to 7 are views similar to Fig. 4, showing may be removed from its head 53, for the pur successive operating positions of the parts in volved in Fig. 4; and, " pose of inserting a fuse link 51 through the fuse tube 5I and thereafter screwing down the head Fig. 8 is a fragmentary view of a lower por 55 to hold the upper end of said link. The link tion of Fig. 1 illustrating opening action of the passes through the fuse’ tube and out of its lower lower end of the fuse holder, the same being end. At the lower end of'each fuse tube 5I is a 40 clamp 59 carrying an extension eye 6I. Pivoted viewed on line 8-3 of Fig. 2. Similar reference characters indicate’ corre at 63 to the clamp 59 is an arm 65 of bell-crank sponding parts throughout the several views of the drawings. Referring now more particularly to Fig. 1, there is shown at, numeral I an arm for holding a verti shape carrying the respective pair of gudgeons 49 for the fuse holder assembly under considera _ tion. This bell-crank arm 65 has a normal po sition such as shown in Fig. 1, the unbroken fuse link 51 holding it in such position. The fuse link maintains the stated position because of its cal insulator 3. At the upper end of this insulator is held a laterally extending bracket 5, thev same being held in place by a screw clamp 1. This attachment to the arm 65 at a screw terminal 61 bracket 5 has suitable openings 9 for receiving,lr (in and its attachment at 55. 50 Whichever opening desired) a line wire connec In order to hold a fuse holder assembly upright tor Il. at positions B or C in Figs. 1 and 2, each eye 6I Pivoted to the bracket 5 at points I3 is a mul--l is provided with a. lateral finger 69. In the cases tiple-contact arm l5. This arm l5 is :made up where a fuse .link assembly (all the assemblies rigidly with struts I1 carrying at their ends con are alike) is inserted in the brackets 43 or 45 tact hoods I9, 22H and 23. Each hood has skirts (positions B or C), the fingers 69 serve support 2 assoc/,coo ing purposes in connection with hooks 1I pívoted bly A) , the catch of pawl |01 is engaged with the at 13. Each hook 1| is biased downward by a spring 15. Hence when fuse holder assemblies are positioned with their gudgeons 49 in the slots 41 at positions B or C, the levers 65 at this time being held against the lower ends of the tubes 5l ratchet. ratchet While the catch of the pawl |09 is not, the latter being spaced some distance from the .i Upon blowing of the .fuse in the fuse holder assembly at A and dropping-out of this assembly, the bias ofthe arm i5 is brought to bear (through by the links 51, and rotated outward, the hooks the mechanism 99, 95, 89, 9_1, |03) to pull down I 1I will catch the fingers 69 and support these two the pawl |01 which at this time is in engagement 10 with the ratchet wheel I I |. The result is that the shown in Fig. 2. . escapement mechanism outlined is driven. The Each arm 1l is prevented from descending too cscapement mechanism provides time-delay while far after release by means of contact between permitting movement until the next succeeding a. stop |0 on the arm and the upper surface socket 19 of member 2| approaches the fuse link of the respective adjacent support 43 or 45 the assembly positioned at B. However, before con case may be. tact made between 2| and the upper end of this The fuse holder assembly that is placed in trie inse link assembly at B, the catch of the pawl |01 A position (Fig. 2) also carries a ringer E9 but :arranged to slip from engagement with the only io the purpose of interciialigcability and ratchet III (Fig. 5) so as to bring about a sud 'uniform When a fuse holder assembly .is den contact between the member 2| and the top placed in position A the nnger t9 is of no use oi this second fuse link assembly. This tends to otherwise. because when the inse holder is ro~ avoid arcing contact. At the same time the catch i' ‘d upward in position A its contact head 55 fuse holder assemblies in the B and C positions of the pawl |09 comes near to initial engagement , en nigcs the sloping cam ‘ll oi the socket I9 and cams the` arms l5 upward. the con with the :ratchet lII, as indicated in Fig. 5. it, when, inse linlf; in the ruse holder as» nortion 55 moves into the socket '15, where» '. i1; ,n the Abias the sp. - 2l” i5 downward acts to hom the "' casina“ the ari'n _ . - -- . „. positions bly in position B andA.C The are spaced .fuse holat increasing assemblies biotic, and that fuse holder ‘falls away, - ...lravflng its support from the arm, I5, almost immediate engagement between the pawl lllg and the li icou‘oles "up the gea-r train i'or time-»delay action as indicated between Figs. 5 and This again under downward bias of arm l5. 'Ii’he time-»delay action now proceeds un til socio` in member 2t approaches the head, 55 oi tilt-i third fuse holder assembly in po 35 sition C. Before contact is made, the catch of tanccs from the sockets in members 2i and 23 by " reason of their descending order ci support. In order to delay circuit reclosing actions through the fuse holders at positions B and il?. a time~de1ay mechanism M is This mech» anism comprises a gear bor; 9| rigidly fastened pawl H19 slips from the ratchet l i i to permit final to the bracket 5 by means of a bolt 83. quick: reclosinc.' action of the circuit. The posi~ The box is provided with a cover B5. Within tion of parte with the circuit closed through the is a main shaft 81 which also reaches exterior-ly. i'use holder assembly at C is shown in Fig. 6. Here the shaft 91 is provided with a keyed arm 40 Finally. when the fuse link in the fuse holder 99 having at its end an arcuate slot 9i for angu assembly at «Si blows, the corresponding fuse hold larly adjustable connection at 93 with an. arm 99. er mselnbiy drops out, and since neither pawl |01 The end of the arm 95 is ‘Divotecl at 91 to an oft» nor |09 is engaging the ratchet wheel III, the set connecting link 99 which in turn is pivoted at 'lugs 33 engage the |0| to one side of the contact arm I Thus down à c: alim iE moves down uch stops 35, This ends its travel. ward rotation of the arm I5, through the linkage It is to he noted *im* when the upper pívoted 99, 95, and 09, tends 'to rotate the shaft 81. The purpose of the rotary clamping adjustment at the slot 93 is to obtain angular phase adjustment between the arm i5 and the shaft B1. Referring to the interior of the bor; 8l, the shaft 81l has keyed to it a bifurca'ted arm |03 >having a pivot pin |05 for a pair ci pavvls |01 and |09, both of which, by means c'î- spring H3, are normally biased toward engagement with a ratch et wheel I I I. The ratchet wheel i I I is on a corn mon shaft ||5 with a gear |11 that meshes with Contact ar. ‘ swings down into contact with 60 tions, the soc B and C posi pc , ne cavities 19 in the members ti and 23 tend to cam the fuse holders backward -from the positions shown in Fig. l, so that the respective- pins 69 are drawn away from the associated notched portions of the hook 1|. This is because the sockets or cavities 19 have a larger radius than the respective heads 55 which cooperate therewith, as indicated in Fig. i. The a pinion |I9. Pinion ||9 forms a rigid cluster (on. a countershaft |20) with a gear |2| which meshes with a pinion |23 on a shaft |25, the lat~ ter also carrying an escaperncnt wheel |21. The teeth |29 of the cscapement wheel successively contact pallets I3I struck ‘up from an oscillatmg socket in each hoo-:l 2| and 23 is positioned to strike its respective head 53 with the front slope of the cavity. In other words7 the cavities in 2| and 23 are not positioned for initially centrally striking the heads 53. lin the case of the first tube A. under hood I9 such positioning is not escapement anchor wheel |33. ‘îi'hus ary and in. this case the cavity may be een» over the head 53. since there is no catch .z 69 ci tube A. Thus the front slope or each cavity in hoods 2i and t3 acts as a cani on the ratchet III is transmiy gearing |I1, IIB, |2|, |23 tothe' stituted by the members I‘t'i, ‘iii an 3c. escapement provides a. time~delay action. The successive oscillating actions of the Wheel i533 in effecting escapement are indicated in Figs. i, to '1. The pawl |01 has a. catch for the ratchet wheel I l l' which is lower than (or ahead of) the catch of the pawl |09. Therefore, when the arm i5 is up. as indicated in Fig. 4 »ithe position which it assumes when resting upon the fuse holder assexn~ to drive the respective head 55 backward into the center or rea bortion of the cocliet, whereby the latch relcasi "ect on the respective pings 69 on tubes alla l.. obtained. The action, being; like a blow, is very effective for the latch releas ing purpose. ’l c members 2i and 21| are stepped forward as indicated in. Fig. i to permit proper coactioi?A witlfi the heads 53 oi“ the forwardly 2,867,090 stepped tubes B and C. Thus, Just prior to the falling out ol' the fuse holder from either the B or C position, the respective pin 69 is pushed back to be free of holding action by the respective hook 1|. Hence the clearing position of the pin 69 shown in Fig. 8 is easily reached, without interference. This improves the reliability of 3 conditions applied thereto, the other conducting means being pivoted, means biasing said pivoted conducting means toward successive engagements with said switch means and normally contacting the highest of the same, time-delay means com prising a single escapement means, a single the release. Among the advantages of the invention is the ratchet means driving said escapement, latches for the ratchet means, a linkage connecting said o1' the fuse holder assemblies. spaced conducting means on the support, one of said conducting means constituting a series of pivoted conductor and the latches, said latches _. fact that the time-delay mechanism is up above l10 being arranged to catch and release from the the arm I6 and out of the way, the same being ratchet means successively. compactly enclosed and arranged, controlling all 2. A repeating fuse switch comprising a support, The location of the time-delay apparatus leaves the region be tween the upper arm l5 and the lower arms 4|, 43 and 45 entirely free for application and closing in manipulation of the fuse holders, just as is the case in a fuse holder in a non-repeating switch. pivot means, substantially identical collapsible fuse switch means respectively pivoted in descend ing order in said pivot means and collapsible in response to overload current applied to the fuses, the other conducting means being pivoted, means Another advantage is that in a very compact 20 biasing said pivoted conducting means toward mechanism both a time-delay eiTect is obtained successive engagement with said switch means and and also a quick action contact for a succeeding normally contacting the highest of the same, reclosure after a given time-delay. time-delay means comprising a single escapement The device is reliable, foolproof, and reclosure means, a single train of gears driving the escape is simple, being simply rotary re-application of ment means, a single ratchet means driving said loaded fuse holders to arms 4|, 43 and 45. train of gears, latches for the ratchet means, a In addition, the operator may fuse and organ linkage connecting said pivoted conductor and the ize the device with any one or more of the fuse latches, said latches being arranged to catch and holders. For example, he may rely for time-delay release from the ratchet means successively. action upon any pair of fuse holders, such as a 30 3. A repeating switch comprising a support, pair at A and B or a pair at B and C. If greater spaced conducting means on the support, one of time-delay is required for operating only a pair said conducting means constituting a series of of fuse holders he may use the device with fuse pivot means, collapsible switch means respectively holders at A and C only. Under the latter condi pivoted in descending order in said pivot means tions the time-delay between release of fuse holder and collapsible in response to electrical overload A and insertion of fuse holder C into the line conditions applied thereto, the other conducting is the sum of the ordinary time-delays between means being pivoted, means biasing said pivoted operations required between A and B plus B and C. conducting means toward successive engagements 'I'his is because, when latch lOl-releases and there with said switch means when uncollapsed and is no fuse holder at B, the latch |09 hooks into 40 normally contacting the highest of the same, time the ratchet ||| and delays further motion of delay means comprising a single escapement the arm I5 in its iinal travel into contact with the means, a single train of gears_driving the escape fuse holder at C (assuming the fuse holder at B ment means, a single ratchet means driving said to be missing). train of gears, latches driving the ratchet means, Another feature is that the operation of . a linkage connecting said pivoted conductor and the time-delay mechanism is not deleteriously affected by the position of the device as a whole. For example, although it is shown vertical in the drawings, various degrees of tilt will not aiïect the latches, said latches being arranged to catch and release from the ratchet means'successively, the catching period oi.' a given latch being ar ranged for controlled biased movement of the pivoted conductor from the time that one switch member collapses and disconnects from the It will be understood that manipulation of thepivoted conductor until the pivoted conductor ap fuse holders is accomplished generally by use of proaches the next non-collapsed fuse holder. the ball-end of a lineman’s stick in the eyes 6|, 4. A repeating fuse switch comprising a sup which are presented forwardly when the holders fall into depending positions. Fig. 8 shows an 55 port, spaced conducting means on the support, one of said conducting means constituting a series intermediate position in a falling operation, just of pivot means, substantially identical collapsible before an eye 6| rotates to the said forward posi tion. ‘ fuse switch means respectively pivoted in descend ing order in said pivot means and collapsible in In view of the above, it will be seen that the several objects of the invention are achieved and 60 response to electrical overload applied to the fuses therein, the other conducting means being pivoted, other advantageous results attained. means biasing said pivoted conducting means t0 As many changes could be made in the above Ward successive engagements with said fuse switch constructions without departing from the scope of the invention, it is intended that all matter con 65 means and normally contacting the highest of the same, time-delay means comprising a single tained in the above description or shown in the escapement means, a single train of gears driving accompanying drawings shall be interpreted as the escapement means, a single ratchet; means illustrative and not in a limiting sense. driving said train of gears, latches driving the I claim: 1. A repeating switch comprising a support, 70 ratchet means, a linkage connecting said pivoted conductor and the latches, said latches being ar spaced conducting means on the support, one of ranged to catch and release from the ratchet said conducting means constituting a series of means successively, the catching period of a given pivot means, collapsible switch means respectively latch being arranged for control of the pivoted pivoted in descending order in said pivot means conductorfrom the time that one fuse switch and collapsible in response to electrical overload 75 member collapses from the pivoted conductor . 1t. 4 aneignen spaced said conducting conductingmeans meansconstituti pivot means, a plurality ci? c: means respectively pivoted in a series of - means and collapsible in response to electrical _, Z1) sa.lile switch r Ming order in «ducting means being pivoted, means biasing said i. said switch ward successive engagements „ne nearest of means and normally Contactin the escapement means, a ` „ ig a single f gears driving tchat means ing the driving said train of gears, gagements with «said fuse holders and normally only contacting the nearest of the same, tinie~delay means comprising a single escapement means, a single train of gears driving the escapement means, a single ratchet means driving said train of gears, latches driving the ratchet means, a linkage connecting said pivoted conductor and the latches, said latches being arranged to catch and release from the ratchet means successively, the catching period of a given. latch being arranged the ratenet ad of a given the nivoied “i by collapsing until the nivo-ted conductor ai» preaches ', “n ‘however the next releasing non-collegiaal from theinse holder, means 1w lati tlie neat member, the latcliine' however ratchet means before contacta is ` for control of the lpivoted conductor from the time that one fuse holder leaves the pivoted conductor means successively, the can; leaves the pivoted conductor the pivoted conductor approae pívoted conducting means toward successive en~ ‘seing ar» conductor and the latches, ranged to catch and rele:` conductor from the time " overload conditions applied thereto, the other con». pivoteti ratchet means, a linkage latch being arranged for «co of pivot means, collapsible fuse holders respec~ tively pivoted in descending order in said pivot a support, mrt, one of said pivot means and individually oliapsibie in response to electrical overload col ions applied ng pivoted, thereto, the other conducting me? means to» means biasing said pivoted con in escapement means, a single train. one of said conducting means constituting a series use holder, fore it contacts the next nonnel m 5. A repeating switch co the same, time-delay means c port, spaced conducting means. on the support, but be~ until the pivoted conductor ai with said second switch member, whereby' said ‘pivoted cone duc-,tor may approach `the second switch member untrammeied by the timeW-del y mechanism une. under pure bias on said pivoted comino 'ne means. 6. A repeating inse switch, comp.. [email protected] a preach the second inse no er nntri in time~delay action and under ` between said pivoted conducto 'I'IHEODÜRE BlRFILÍiSMMAIER.