US928901A - Automatic circuit-breaker. - Google Patents

Description

H. W. CHENEY. AUTOMATIC CIRCUIT BREAKER. APPLICATION FILED 001222, 1906.

m. w L 0 2H 9 Patented Jul 20, 1909.

mam/5 'HwW. CHENEY. AUTOMATIU MRGUIT BREAKER. APPLIUA'UON FILED 0013.22, 1906 Patented Jul 20, 1909.

a sns'rii-snnnr 2.

'imswxw Mar aux @whqz H. W. CHENEY. AUTOMATIG CIRCUIT BREAKER APPLICATION FILED 001222/1906.

Patented July 20,

5 sums-SHEET 3 a Mm-MX Q wxvm CHENEY. F AUTOMATIUGIRGUIT BREAKER. AIPLIOATI'ON FILED OUT. 22,1906.-

H. W.-G-HENEY.' 7 AUTOMATIC CIRCUIT BREAKER.-

APIELIOATION VI'ILED OUT. 22, 1906.

Patented July 20, 1909.

5 SHEETS-SHEET 5Q 7 E I I I I p Z 1 1 I I I I I I I I I 1 I! Mwm/VM NMWX an m6 W I g 2 4 I HERBERT w; CHENEY, or NOItWOoD,OHIO,ASS1GNOR TOALLIS-OHALMERS COMPANY, 'A'

. PANY, A 'OORPORATIONOF OHIOQ' 'I:

' CORPORATION. or NEW-JERSEY; AND frnn BULIQCK ELECTRIC MANUFACTURING COM- I Amounts] onscm'i nnnmn.

. 1N0. 928,901. I a

- es enti -m of Lette s Pa ent:

Patented July 20,; i909.

qepplioetiqn fleiQntober 22, 19,06. Serial No. 339,905.

anthem: may some: i

- woodygin" the county otHamilton'and State *ful Improvements in Automatic Circuit- Breakers, of 'which the followingfis a fulhz clear, and exact specification-' ,Myinvention relates tofoil switches or ci .10 -cuit breakers adapted either for: jmltorn'atiq or manual-operation.

On'e of the objeqtsofmy I .provide an, oil .switch orifcircu it breaker. which is'simpleinjeonstruction'elideitective gin' operation;

proved switch.operating nechanisrn.

l i i .A still .further object'gisfto provide n{ prov d-means foradjusting the'position pf 1 the-armature of thetrippingfmagnet in the I 125- hutomatic'form oitimy switch;

from thej'fol- Other objects willappear, towing detailed. description.

1 Myinvention consists in cert "in novel'de ms ofTconstrnction' and the combina ions and-arrangements of parts described in the pecification and' set forth in the appended Fee etter understanding of my inven- .,ti o11, referenceis had tothe accompanying wings infiwhich 'f' f 1 V Figure is'a partialsectional 'elev ation i l mechnnismfgli iig. 2 is an elevation my.i1n-- d; switch, part's'being in section. and ",away,ithe view being taken from the 'ppqslte side tothat shown in Fig; 1; 'Fi 3 isi- -n transverse section" through the swim 1 looking toward the rear of the switch" Fig;

'hanism and of a portion of the switch, witch-panel being shown in section Fig. sideelevation of the switch 0 ei'ating nism showing the position of t e arts he switch .has been automatically Fig." 6 is a sectional elevation ,lookg ivard the switch anel from. the rear showihgfportion's of 't e switch o crating @meeh'e and" the tripping niec mism; Fig. janelevation o a manual switch I pliers ting mechanism showing alsb lie it known'that 1,11 ii1:':'W;.CHn1-I-nr, c tizen of the United States, residing at Nor;

of Oh1o ,'have".inven t;ed' certain new and'use ,4"1S a plnn' view of the switch ope! sting l i V panel in section; Fig. 8 is agsection-similar 1 h1g1 haveshown at 10 a switch-board panel,

cover. for the-oil tank. The casting 12 is ;pro vided with downwardly extending portions 13 and 14 on the sides and ends re- ;s'pectively. Bearing against the lowerex tremitieszof the casting 12 is anoil tank 15.

. -made from-east; metal'such as iron, in. the

switch asiwill b'e'eXplained.-, The tank is supported on the upper casting. in this instance 'by-three pivoted .bolts and winged nuts .16, 17 and 18 mounted on lugs on the slots of lugs 19, 20 and 21 on the upper cast- It isseen from Figs. 2, 3 and4 that the Winged nuts 16, 17 and slotted lugs 19 and 20 are on the sides of the switch ad- ;jacent the panel, and the pivoted bolt and the end of the switch most remote from the panel. The tank is made from cast metal for the reasomthat in the preferred con struction part of the switch elements are supported thereb It is necessary, there fore, that tiretan after removal be restored v p p to the exact position that it occupied before irnprjovedgoil switch,- and o el ating 1 removal. For this pur ose I provide in one or-more of the slotted lugs which receive the pivoted tank retaining bolts, dowel-pins- 22 which en age sockets or recesses in the lugs on whic i the pivoted bolts and winged nuts are pivoted. After the position of the tank has once been ascertained, the dowch pinor pins are secured in position. The tank can then after removal be easily and accurately replaced to its proper position.

The switch is secured to the switch panel by bolts 23 which panel and throu l1 ugs 2-1 on the end of the upper casting. heswitch here shown is a threehose switch but my invention is not limited to a switch for n three-phase circuit. The top of the casting is provided with fiu'ee pairs of terminal openings, the pairs portion ,Q'fthe SWltCh in elevation, and the switch. r

preferred construction ofinyswitch. This tank also serves to support. parts of' the 1pnss through the switch i'Lo Fi 3 showing a modified form of switch. I 5 Re erring now to the figures of the drawonv the rear of which the oil-rswitch 1 1 is mounted. The switch is provided with an upper horizontal casting 12 which supports of the switchelements and forms the oil tank 15, the pivoted bolts fitting into winged nut1'8, and slotted lug 21 are on of openings being-arranged in lines success vely away from the panel. Referring now 1 articularly to Fig. 3 it is seenthat in each air of openings are porcelain bushings 25 and 25 which rest upon the-lop of the casting.- Mounted in the porcelain bushings are two sets of terminal rods 26 and 27. Each terminal rod 26 is provided on its lower end with a pair of nuts 28 and a collar 29. Be-

tween the collar 29 and the-top of the casting s a porcelain sleeve 30. At the top of the terminal rod 26 abovev the casting are a pair of nuts 31, by means of which the terminal rod 26, bushing 25 and sleeve 30 are rigidly held in position. The nuts 31 also serve to clamp in position the terminal lead 32. The terminal rods 26 aresurrounded in this case by insulatingsleeves 33. Secured to each terminal rod 27 at a suitable distance from the casting 12 is a collar 34. Located upon the collar 34 and the u per casting 12 is a sleeve 35 similar to the s eeve 30. At the top of each terminal rod- 27 are a pair of nuts 36 by means of which the terminal rod 27, porcelain bushing 25 and sleeve 35 are rigidly held in position. Between the two nuts 36 the second terminal lead 37 is clamped. Each terminal rod .27 is surrounded'by an insulating sleeve 38 which rests upon the collar 34.

At 39 is shown a rotary contact drum which carries the movable switch contacts as will be explained. As is seen, the drum is arranged at right angles to the switchboard, and is mounted in the two downwardly extending portions 14 of the upper casting 12. 'In this instance the end of the drum remote from the switch panel-is provided with a socket which receives a trunnion 40 mounted in the end of the casting as is shown in Fig. 2 and the end of the drum adjacent the switch-panel is provided with a socket which receives the end of a spindle 41 which is secured to the drum by a transverse-pin 42. The downwardly extending end-portion 140i the casting is provided on its outer side with a lug 43 having an opening through which the spindle 41 passes.

The drum 39 is provided with three equally spaced openings through which pass three movable contact rods 44 which are provided at the up er ends with nuts 45. At 46 are shown which are clamped at one end between the nuts 28 on the lower ends of terminal rods- 26 and at the other end between the nuts 45 on rods 44. Contact rods 44 are each proexible leads or connectors .lead 4'? secured thereto is seated in a recess 52 in the drum, which recess partially closed by an insulating shield Thus it is seen that the live portions of the movable members are well insulated from the live portions of the stationary members now to be described.

Mounted in the bottom of the oil tank 15 is a wooden or other insulating bar 54 which rests on lugs fifnand is secured thereto by screws'56. This bar also extends at right angles to the switch panel and is located below the terminal rods 27. Secured to the insulating bar 54 by screws 57, opposite the movable contacts 50 are three equally spaced contact finger bases 58. Secured to each finger base by one of the screws 57 is a stationary contact member 59, consisting of a contact finger 60 and a pair of upwardly extending spring jaws-61 shown most clearly in Figs. 1 and 3. The contact finger and spring jaws 61 are integral with each other and are preferably punched from sheet metal. At the end of each contactfinger 60, is a contact 62 adapted to be engaged by the corresponding movable contact 50. The terminal rods 27 are longer than the terminal rods 26 and are provided at their lower ends with plugs 63 which engage the contact jaws (31. The jaws (S1 and plugs 63 are so arranged that when the tank is raised in position each of the plugs 63 engages a pair of contact jaws 61. The portion of each terminal rod 27 between the collar 34 and the block 63 is surrounded by an insulating sleeve 64.

The different poles of the switch are separated from one another and from the ends of the switch castings by vertical insulating barriers 65. Each barrier consists of two portions (35 and 65* which are in engage ment with each other along the center of the rotary drum 39 the upper and lower portions each being provided with a semi-circular opening so as to fit closely around the drum adjacent circular flanges 39 integral with the latter. The upper portions of the barriers are preferably secured to the top of the casting by screws 65 and the lower barriers are preferably secured to the upper barriers by connecting strips 65 and screws 65. The lower portions of the barriers are provided with notched portions so as to fit closely over the insulating bar 54. The bar is provided with flanges 59 adjacent the barriers so as to more completely insulate the poles from each other and from the ends of the castings. If desired the lower portions of the barriers may be secured to the tanlk or bar 54 so as to be removable therewita.

I 13*. These openings so-form'e'd are preferv ably covered with *reinovable' sheet metal coverings (not shown) to r vent the oilv preventdirt or sediment from entering thef' tank. The openings and removable eovers 'or doors provide convenient means form-- specting the contacts without removing the:

v sewer that the sides 13 of thenpperswitchcasting? 12 are partially removed forming'openings from splashing out-of the tank; and also to Hulk.- I i v The, automatic switch ,operating fmechane ism will now be described. The outer ,end of the spindle 41 which is: secured totho end of the drain extends-throu h the lug 43 and provided at its endga jacent the switch panel with a weighted lever arm 66,- p secured to the end of thespindle 41 by a ,pin' 41% The weightedlever. a'rnr 66 which. is-

provided' with an enla-r ed outer end-66 jis )so-seured to thespind e41 that when the switch is closedthe lever arm is siibsta'ntance from the lug'43 is-a' hi (57. Secured tofthe lug by screwsfiS is 'al which bears upon the-'weightedlever and assists opening the. switch. This spring may; if'-desired,' be dispensed wit h'.-" Mountedin thetwo lugs- 43 and 67 is a pin ;70 one end of which-preferably engages a, groove in the shaft to prevent a longitudinal movementthereof. Mounted on a. pin. 70 -is a 4 bell crank lever 71 having at the endxof the upwardly extending arm-a roller 72'mounted on a transverse pin 7 3c, whichroller is sub'-. stantially in line with the axis of the spindle.

" ll-{and drum 39 of the switch. The oppo- 1 second arm' 8Ov of the site arm of the bell-crank lever 71 is provided with a slightly enlarged end Tshown in dotted lines' This end 74 of the arm of the bell-crank lever is located inla hollowed. v or recessed portion of the Weighted lever. located ,between t-heenlarged end ofthe" ever arm d r I roller 727 on the"end of the arm 'ofthe bellv arm 66, the recess portion hem and the spindle' ll as is. shown-in Figs. 1

and 4'. Thus it is seen thatif the bell-crank. lever is rocked about its pivoted'center that s the weighted. lever; sesame hence the rotary drum 39 are also rccked'orv rotated.

Pivoted at75'in a. casting '76Vwhich is secured to ,the front ofithe'switch-panel'10, is a switchoperating handle Secured-to the operating handle is 'onearm 78' of the" toggle. Pivotedtothearm- 78 -at-79 is the extends through a I panel and h'a's'a 'fre; titer-end adjacent the switch; The andto'ggl mech-v anism are so rrange h of the arm "80 is provided with an-inclined noseshownatfil. 'In line with-the arm 80 and in path of moven'ient with the inclined rti 'on83, isan adjustable screw 84 secured i to the top. of the h1g3? adjacent the end 14 of the casting The will" be explained later;

eaf spring 69 willappe'arlateri g e-j The ar 30 g in the, switch is? heee i e slot. 81 wl 1ich is adapted to receive the roller 72Jupon the upperend of the arm of the bell-,crankdever 71-h One' side ofthis' slot,

81 extends downward substantially in a straight, line, while the opposite side is partly inclined as is shown at 82-; -.The -endpurpose of this screw .:'.jL0cated= on the rearside oil-the" switchp'an'el and secured thereto by screws or bolts ;-is a frame .or casting-" 85 far the tripping mechanism. astmg i's provided with a rearportion in engagement gwith the panel,

with twohorizontal gprojeetions' 86- forming 'hand-le 77 =and thejarms 78 'andSO .ar'e sub stantially in linewith theaxis 0fthe switch drum. The outer free end of the armSO is provided-- on its' 'under;,side- Withan op n 70 (ores forztrippi'ng"coils- 87, and a forked horizontal portion ms and; with, a d0wnwardly extendin jlugSQ;

casting on'a horizontal pin-or spindle 90 is a pivoted armatiire gl havihgan enlargedpor tion 92 adaptedto-be, drawn into engagement with the-cores oft-the tripping magnets, and

:a' projecting portion Qhthe purpose of which The-armature is also pro 'vided with-two arms, through the lower ends; t of which-passes the spindle 90 as is shown in Figs 1 and '6 Alsomonnted on thejpin or 90 Mounted between, 1 s the a'rms'of the orizontal portion 88 ofthe spindle90,-is a 'movable'latch 95 having at i one side a? weighted portion 9'6] "and "onthe' normally in engagement with the lower side =01 a bar' 98- ektending between the arms 88 (at tl1e"cast ing, 85. The pirated latch 95 is ale-3' provided on i Ls lower side with a projection 99 which is recessed or forked at its lows-rend in'wliich forked-portion is mount,

crank leverin engagement with each other I when the 'switchis closed. The lug or proplain d 'acts as a stop to limit the upward niovementbifthetoggle arm when; the switch is opened.--

ping coils, sothat-the'switch can be caused to open at ahyfldesiredf predetermined line condition, Onithe front ofitheswitch-board opposite side m finger 97 located beneath and I p U ed a srnallrroller 100 which'is adapted to be I med laterthe purposeof the jeotisnfifi'on the lewer side of the casting or 5 s frame 85tis'1directly'ab0ve the toggle arm 80 'and'is provided on its lower side with an ad "justable, screw c102, which-as will be exc .Ivh'av'e" ravided novel means for adjusting positlon ofthe ari'nature 91" of the trip;

opposite the tripping coils 87 is a plate 104. Extending through an opening 105 of the switchboard panel is a tube 106 supported at one end by the plate 104 at the front end e1" the switclrbmird. and by the casting 85 at the rear of the switch-board. Located within the tube and near the front end thereof is a short rotary plug or spindle 107. The .spindle is provided with a groove 108 'which is engaged by a. pin 109 extending through the wall of the tube 106 so as: to permit a vided with a tongue 112. Extending from the rear. end of the tube and beyond the ends of the tripping coils is a second spindle 113. This spindle is provided with a slot 114 into which the tongue 112 extends and is also provided with a spiral groove 115 engaged by a pin 116 extending through the wall of the tube 105. The rear end of the spindle 113 is threaded and is provided with an adjustable nut or collar 117 against which the armature 92 normally rests. It is seen that when the spindle 107 is rotated, both rotary and longitudinal movements are given to the spindle 113. Thus the position of the armature can be adjusted by revolving the crank 110 The operation of the switch and switch operating mechanism will now be more fully explained. In Fig. 3 the switch is shown in 7 its open position, and in Fig. 5 the switch operating mechanism is shown in the position when the switch is open. It is seen that the weighted lever arm is below its horizontal position, the roller 72 rests on the toggle arm 80 out of the slot 81, the outer vtree end of the toggle arm israis'ed above the opposite end andis inengagement with the screw 102, and that the operating handle 77 is at anangle of about with the switch panel. Now if it is desired to close the switch the operating handle is raised to the horizontal position shown in dotted lines in Fig. l t-hus moving the toggle arm 80 forward until its slotted end drops down over the roller 79 on the end of the bell-crank lever. downward into the ositionshown in full lines in 1 m'ov'mg the toggle arm 80 rearward, rocking the bell-crank lever about the spindle 70, raising the weighted lever 66.

and hence rotating the contact carryii'ig 'n to it: closed position. As the switch in le and toggle arm are near the comp.

at the stroke, the inclined portion .1.

The switch handle is then thrown the roller 100 is to hold the toggle arm and bell-crank lever into the position shown in .Fig. 1, for otherwise the switch could not be held in its closed position. Now in case of an abnormal line condition such as overload in the main distributing conductors, the armature 92 of the tripping magnets is attracted by the coils and the projection 94 strikes the horizontal finger 97 of the latch with suflicient force to rock the latch 95 about its pivotal center, and thus moving the roller 100 away from the projection 101 on the toggle arm, permitting the arm to be thrown upward by the pressure of the bellcrank lever arm due to the weight 0 and the spring 69 and permitting the weight to drop and the switch to be opened. When the toggle arm is thrown upward it strikes the screw 102 causing the operating handle to be moved outward to the position shown in Fig. 5 which position of the handle serves as an indication that the switch is open. Thus it will be seen that the arm 80 and the bell crank lever 71 together with the roller 72 which is carried thereby and is adapted to engage the notch 81 of the arm 80, constitute a separable connection or coupler bet-ween the operating handle 77 and the switch. It will be seen also that when the e arm 8 "g.i 'estl1e screw 81 nu; :rflg movement of the handle, i sli ht relative movement is a between the parts of t e coupler-or a partial the projection 101 on the arm 80, total disengagement or separation of the parts of the coupler occurs.

In Fig. 7 is shown. the switch operating mechanism adapted for manual operation alone. The manual operating mechanism is similar in the main tothe automatic operating mechanism first described. As is in the first case the switch drum is adapted to be opened by a weighted lever 66 which in this case however. must be released by hand and not automatically. The operating handle and toggle arms are shown respectively at 77, 7S and 80. The outer free end of the toggle arm 80 is provided with a slot 81 and an inclined portion at the forward side thereof and with an inclined end 83, adal' te rl to engage the screw 81 in substantially the same manner as first described.

i In this case. the upper casiing 1; is pro- ".idcd with a forwardly extending big or E projection 118 which some: to hold the logv the manner Ofsupporting, the stationary Lcontacts.

"-pletion gle arm and roller and-the bell-crank leveljin position; {Ihe moving the. hand1e' ,first -to position and then itotheposition Fig. =7, asinthe' fir stcase of-Ithis stroke of the:

own in screw 84* and the toggle arm-is lifted a short ifo ' distance upjwardgaway iromfthe roller 72 until the 1' ar upward. end ..of the arm one, gages the'lo '118. When it is desired to op'enthe switch er sideof-the lugor projection the handle m'o'vedamanually outward, a

suflicient*distance to move the end of the a. lower side ofthe lug endogf the togglearm' 118 hebeH-cranklever throws the lever arm toggle arm out of engagement with the 118. Atthe instant the upward and the switch g g is opened by the weight and sprm i tion thatthe switch is quickly opened, the hand operation-differing from the automatic 1- of the switch. The. its essential.- points" operation merely infithe release of the toggle arm and bell-crank leven; f

- In Fig. 8 I have-shown ajmodifiedform I switch here shown is in similartothe's'witch first described, the-main difference being In this casethe'la'tter are supported from the upper casting independently of the-switchtank, which can there for be removed without'disturbing the contact s. Thej-switch casting 1 19 supports.the tel'l ninalirods 120, 121 in substantially the sa. emanner-as the terminal rods 26 and rovided' at its lower orcelain sleeve 123., Secured to .the lower side of the base122 by a screw 124 is a flexible contact finger 125 which supports a stationary contact 126. At 127 is shown a rotary drunrmounted in lugs 128 (only one of which is;shown) extending downwardly from the lower partof the casting 119/ The drum is provided on opposite sidesv with recesses in which are-located nuts 129 and 130, which clamp the movable contact rod 131 into position. A flexible. lead 132 connects the movable contact rod 131 to the terminal rod 120 as in the first construction.- Each contact. rod 131 is provided on its lower end with movable contacts 133 adapt-ed to engage a stationary contact 126.

The recessin the upper part of the drum which receives. the nut=129 is preferably filled with cement 134 after the contact rod 131 is tightened in position. Each flexible terminal l32 -and .nuts 130 are preferably partially surrounded by an insulating shield .135. The purpose of the cement 134 and shield 135 is to protect the live parts on the movable members and prevent flashing beswitch: is closedby the fh-orizontal .Nearthe comtoggle arm '80 forward ncl ned end 83 engages the.

ments for.

moves beyond the lug ,It is-seen that both in hi I OIISLIII i Yg hnd in the first construe stantially at ri ht-angles to the switch shown in Fig.3. Each of the terminal /rods 121 however is g,

end witha base 122w 1ch rests against the .movable contact members,

tween suchstationary lower side 136 made drum- -'12 7 1isadapted. to be operated .in exactly the 'saine mannera drum 39 of the first construction.

of thecasting- 119-is an oil tank preferably from'sheet metal. The o parts and the. live part sot the I contact. members Secured to the" From-the above itis apparentthat I have i devised a. simple in. will. also high voltage switch which is construction and operation. It beyseen, that since the compart- 111 a lineat right angles to-the switch-board that; the "width of a .two' or three phase switch isno greater than fora single phase switch, and therefore the switch can be easily applied to narrow panels. It, is also the difierent phases'are arranged apparent that. many alterations can be made i in thefswitch mechanism-and construction without departing from' the spirit andscope of my invention. I therefore do not wish to be limited to the details shown but aim in my claims to cover all such altera- In combination, a switchboard, an oil QSWllZCh on the rear thereof, said switch havsaid longitu'dinally movabe rod pivoted to the handle.

2. In a rotary Oll switch, stationary and movable contact members, a rotary drum on which the" movable contact member is mounted, a weight on said drum for openingthe switch,- and means for closing. the switch comprising an operating handle and said weight.

3. In a rotary oil switch, stationary and, a rotary'odrum on which the movable contact member is mounted, means" including an operating handle and a lon itudinally' movable rod for turning said d rum in one direction to-close the switch, means for causing said rod to become disengaged from said .drum, and means for turning the drum in 'the opposite direction to open the switch.

4. In a rotary oil switch, movable contacts, an oil receptacle inclosing the contacts, a rotary. drum on which the movable contact is mounted, said drum havstationary and r10 mechanism connected to said handle and. to n w ing an end extending outward from the receptacle, means exterior to-said receptacle for turning said drum in one direction to close the Switch, said means including a hantary drum on which the movable contact is die and a longitudinally movable rod arranged to be placed in operative relation with said end of the drum, and means for causing the connection between said drum' and rod to be broken so that the drum can turn in the opposite direction to open the switch.

In a rotary oil switch, stationary and movable contact members, arotary drum on which the movable contact member is mounted,means including an operating handle and a longitudinally movable rod for turning said drum in one direction to close the switch, means for causing said rod to become disengaged from said drum, and a weighted meme her on said drum for openingthe switch.

In a rotary oil switch, a supporting frame, stationary and movable contacts, an oil receptacle inclosing the contacts, a romounted, said drum being journaled in the frame and having an operative end extending outward from the receptacle, means exterior to the said receptacle including an operating handleand a longitudinally movable rod adapted to be connected to said drum for turning the latter in one direction to close the switch, means for causing the connection between the rod and drum to-be broken, and a weighted member on said drum for opening the switch.

7. In a rotary oil switch, stationary and movable contacts, an oil receptacle inclosing said contacts, a rotary drum on which the movable contact or contacts are mounted, said drum having a portion extending outward from the receptacle. a weight mounted on said outwardly extending portion of the drum, means including an operating handle and toggle arm adapted to be connected to said weight for raising the weight and for turning the drum to close the switch, and means whereby the connection, between the toggle arm and weight may be broken so that the'drum can be turned by the weight to open the switch.

8. In a rotary oil switch, stationary and movable contacts, a rotary drum on which the movable contactis mounted, an arm extending outward from said drum, means including an operating handle 'and toggle mechanism connected thereto and arranged to be placed in operative relation with said" arm for turning the drum in one direction to close the switch, and means for causing said toggle mechanism and arm to be disconnected whereby the drum can turn in the opposite direction to open the switch.

9. In a rotary oil switch, stationary and movable contacts, an oil receptacle inclosing the contacts, a rotary drum carrying the movable contacts and having a portion extending outward from said receptacle, an arm secured to said outwardly extending portion of the drum, means including an i operating: handle and toggle mechanism adapted to be placed in operative relation with said arm for turning the arm and drum to close the switch, and means whereby the connection between said arm and the toggle mechanism may be broken, so that thedrum 7 dan turn to 0 en the switch.

10. vIn com ination, a switch-board, an oil switch mounted on the rear thereof, said switch comprising a frame having downwardly extending portions, a rotary drum or shaft at right angles to the switch journaled in said downwardly extending portions of the frame, said drum having an operative end extending beyond one of said downwardly extending portions and located betweenthe latter and the switch-board, a plurality of movable contacts mounted on said drum, an operating mechanism for moving. the drum in one direction to close the switch comprisinga handle pivoted to swim toward and away from the switch-boar and means for moving the drum in the op posite direction to open the switch.

11. In an oil switch a rotarv drmn or .1 spindle carrying movable contacts, an oil re- ,ceptacle inclosing said contacts, said drum having an operative end extending out-ward beyond the receptacle, an operating mechanism exterior to said receptacle for moving the drum in one direction to close the switch, means for causingthe connection between said drum and the operating mechanism to be broken whereby the drum can turn in the opposite direction to open the switch.

12. In an oil switch. a supporting frame, a rotary drum journaled in said frame, a plurality of movable contacts mounted on the drum, an oil receptacle inclosing the contacts, said drum having a portion extending outward beyond the receptacle, an operating mechanism including a pivoted handle and a longitudinally movable rod connected to the handle and in operative relation with said outwardly extending portion of the drum, the axis of the drum being in the plane of movement of the operating handle.

13. In an oil switch, a rotary drum carrying movable contact members, an oil tank inclosing the contact members, av portion of the drum extending out-ward beyond the receptacle, and an operating mechanism ineluding an operating handle and a longitudinally movable rod in operative relation with saiiflnoutwardly extending portion of the drum'fthe axis of the drum being in the plane of movement of the longitudinally movable rod.

14. In combination. a switch-board, an oil switch mounted on the rear thereof, said switch comprising a rotary drum at rightangles to the switch-board, one or more movable contactsmounted on the drum, an oil receptacle inclosing the contacts, said drum having one end extending outward beyond card and lG I-I'n. combinationfa switchboard, an oil switch on the rear thereof, saidsvvitch having l t eh 'eceptacle toward" the a lateral arm or; extensiononjsaid outer end of the drum-and movable therewith', an operat.

I thereto, and. me 'ans for transmitting the ring mechanism including a1 pivoted handle, a longitudinally movable' rod connected I lnOVlneIlil of saidf rod to said lateral arm or 'GXtBll SIQIL' EQ 4 i g n '15. "In combinat on, a: svvitch board, an oil ..1 f

switch mounted onI-the" rear thereofjsai'd.

- switchoomp'rising a rotary- [drum at right Tangle-s to'thes itchboa rd, one or more Imov- 1 .thereto, and means comprising a bell-crank levergconnected to saidlater'al arm or extension for. transmitting the" movement of fable contacts mounted on the drum, an .oil

7 receptacle inclosing said contacts, said drum. r I ,havi'ngon'e'end extending outward-[beyond j the receptacle toward "the switch-board, a

' I i'lateralarm orextens'ion" onsaid outer end of the drum and. movable thereyvith, ano'perat- "ing. mechanism including a pivotedhandle anda longitudinally movable rod connected a rotary'drumat right angles; to the switchrod c'onnected to said handle, means connected to said drum and arranged "to be placed in locked engagementwith' said rod soithat said drum canbe turned in one di-' mg a rotary drum. at right an switch-board, one or more mov.

f rection toe-lose the switch'bya movement of 'Stlld. handle; and to bereleased from said rod to permit thedrum to turn in theopposite direction to open the switch. l

17. In combinatioma switch-boarder switch mounted onthe rearthereof, said sWit h havq'les to the lile contact members mounted on the drum,.an operating mechanism including a pivoted handle on I the front :of the switch-board, a longitudinally movable rod connected to said handle.

a 'jal'ever connected to said drum and ar 'anged to'be placed inlocked engagement with said arm so that said drum can be turned in one directionand the switch closed a movement of the handle, and to be released therefrom so that said drum can turn in the op- 'posite direction and the switch opened.

18. In combination, a switch-board, a switch mounted in the rear thereof, said switch having a:r0ta ry contact drum at right. angles to the switch-board, an arm or extension movable with said drum, a bellcrank leveree ngaging said arm, operating mechanism including a longitudinally movable rod adapted to engage said bell-crank lever to move the drum in one direction to close the switch and to be disengaged there- -;b oard, one or more'mo'va le contactsjcarr'ied by th? drum, an operatngmechanismin eluding a pivoted handle on the front of the switch-board and a longitudinally movable 9 eas gem] saidrod to saidarm or extension and to said for closing the switc 9F 3 i T opposite direction to open th switch;

19. Ina switch or'circuit-breaker, stationary and movable contactmembers, an oper-E sting mechanism including longitudinally movable arm or rod, a movable-; -member adapted to be enga ed by said arm or rod hand means adapted to be; engaged by'saidarm or rod in-its for-,

ward movement. for causing a slight .prede -froin to tli'e drum to betautomatically terminedl relative pmovement between said.

arm or rod andsaid member so that said arm orrodandmember-may be disengaged permittinglthe switch to be quickly opened. I 20;;In 'asWitch or circuit-breaker, an-op-. "era-ting mechanism including a toggle arm havin an 0 en slot in one side a. movable switch member, a lever arm connected there'- to adapted to engage the slot in said toggle .arm whereby the switch can be closed, a projection in" the path of saiditoggle arm to raise the latter a predeterminedamount relative to the leverarm, a stop for limiting the upward movement of said toggle arm, said and toggle arm being relatively movstop able whereby the toggle arm and lever arm.

can be thrown out'of engagement witheach "longitudinally. a movable stop for holding the toggle arm in engagement with said level-farm,- and means for moving the. stop relative to said toggle arm to-permit the connection between said toggle arm and lever arm to be broken, whereby said switch member can turn to open the switch.

22; In a switch or circuit breaker, aswitch member rotatable about its axis. contacts for a plurality of poles carried by said member.

a pivoted lever operatively connected to said member, an operating handle, a toggle arm connected to said handle and having a separable connection with said-lever. a movable device adapted to hold the toggle arm and lever in engagement. and means for autoy matically shifting said device out of engagement. with said toggle arm wherebythe drum is free to turn to open the switch.

23. In a switch or circuit-breaker, a movable switch member, switch operating mechanism comprising a lever and toggle arm. said toggle arm having an open slot 'to receive the lever arm. means for moving the toggle arm longitudinally to close the switclt.

means for causing a slight relative movement of the toggle arm relative to the lever near letion of its longitudinal movement,

the comp means for holding the lever and toggle arm in engagement comprising a pivoted latch above said toggle arm and engaged thereby, means comprising a tripping coil and armature for moving the latch out of engagement with the toggle arm, and means for opening the switch.

524. In an automatic switch or circuitbreaker, a tripping coil, an armature therefor. and means for adjusting the position of said armature comprising a spindle having a spiral. groove, a stationary pin engaging said spiral groove a regolnlole wadjusting member, said member and Spindle having a loose connection. whereby a longitudinal movement can be imparted tosaid spindle by the rotation of said member.

In combination, a switch-board, an automatic switch secured to the rear thereof, a tripping coil, an armature for said coil, and means for adjusting said armature comprising a spindle normally supporting at itsouter end said armature, a-tube extending through said switch-board, said spindlebeing located in said tube, said spindle having a spiral groove. a pin extending inward and engagingsaid groove, a second spindle within said tube, means for rotating said second spindle from the front of the switch-board, said spindles having a loose connection, whereby a longitudinal movement is imparted to the first mentioned spindle by the rotation of the second mentioned spindle.

26. In con'ibination with a switch, an operating mechanism comprising a handle and a couplcr through which said handle may operate the switch, said coupler comprising two parts which are connected together in driving engagement when the switch is be ing closed by a n'ioveinent of said handle, and means for causing a slight relative movement between said parts of the coupler durin g the said movement of the handle, so that alter the switch is closed said parts are biased toward disengagement.

27. In combination with a switch, an op crating mechanism comprising a handle and a coupler through which said handle may operate the switch, said coupler comprising two parts which are connected together in driving engagement when the switch is be ing closed by a n'iovenicnt of said handle,

nicans 'lor causing a slight relative move ment bet ween aid parts of the coupler during the final closing movement of the handle so that said parts are biased toward disengagement after the switch is closed, and means lor normally preventing the disengagement of said parts. I

28. In combination with a switch, an operating mechanism comprising a handle and a connection through which said handle may operate the switch, said connection comprismg LYO parts which are 111 driving engage- 'mentwhen the switch is being closed by a movement of said handle, means for causing a slight relative movement between said parts of the coupler during the final closing movement of the handle so that said parts are biased toward disengagement after the switch is closed, and a latch for normally preventing the disengagement of said parts.

29. In combination with a switch, an operating mechanism comprising a handle and two members, one connected to the handle, and the other to the switch, said members constituting a coupler and being connected together when the switch is closed by a movement of the handle, means for causing one oftlieparts of the coupler to be moved to a posit on such that it tends to move out of engagement with the other part; of the coupler, andmeans for normally preventing the disengagement of said parts.

30. In combination with a switch, an operating mechanism comprising a handle and a separable coupler through which said handle may operate the switch, said coupler comprising two parts, one having a notch and the other a projection which engages said notch while the switch is being closed, and means for causing a slight relative movement between said projection and the part having a notch so that said parts tend to move out of engagement, said relative movement taking place during thefinal closing movement of the switch handle.

31. In combination in a switch operating mechanism, an operating handle and two ,members, one connected to the handle and adapted to shift the other, said members constituting a separable connection, and one having a notch and the other a projection, which, when in full engagement with said notch, permits one of said members to be shifted by the other, means for causing a slight relative movement between said parts or members of the coupler during a final movement of the handle in one direction, so that said parts are partially disengaged, and means for stopping said relative movement and for holding the parts of the coupler in positions such that they are biased toward total disengagement.

32min combination with a switch, a switch operating mechanism comprising a handle and two members, one connected to the handle and the other to the switch, and

the two forming a separable connection, one

of said members having an open notch and the other a device which is adapted to engage said notch when the handle is moved to one position and to remain in engagement therewith while the switch is being closed by a further movement of the handle, and a meniber for causing said device to be moved partially out of said/slot during'the final closing movement of the handle, to a position switch operating, mechanism comprising a handle and two members, one connected to Zfthe handle and the other to the switclnisuid members forming a separable connection andon'ehtving anopen notch "and the other "a device which isadapted to engage said notelt when the handle is moved to one position and to remain in engagement therewith While the. switch is being closed. by a further Letters N o, 928,901;

Corrections m v v movement of'the handle, a member for. causing said 'deviee'to' be mov'iadpartially out of the Patent Oi fice;

the occilrrence of a in the presence of two Witnesses;

' Witnesses:

' i Signed ahcl sealed this7th day of Sentember, A. 1)., 1909.

said slot-during the final closing movement of the handle, ton position such that said device tends to emerge from saiclslot and permit said" members of the separable connect-ion'to move relative to each other, and a .movable member for preventing movementof 'saidiftievice from the notch until after predetermined abnormal line condition.

' In testimony whereof I effix my HERBERT W. CHENEY.

' ARTHUR F. Kwls', FRED J. KINSEY.

. It is herehy eentifi edthat in Letters Patent No, 928,901, granted July 20,1969,

npon the application ofHerbert W. Cheney, ofNorwood, Ohio, for an improvenient in Automfttic Qireuit-l3 rezthers,, errois alppe ztr in the printed speeificzttion requiring I ioo'rreotion, as -f0ll0WsfIn line'20, page 5, after the word weight the hefe 'en'c e- Y 1 nnnie r al and words 66', bitty the' weight. shoultl be inserted; page 6, line 99, the words if can tutti Should read can'be tamed and that the said Letters Patent shoul d be read with these correetions'thereinthet the same may eonforin' to the record of the case in F. AJTENNANT',

Acting Commissioner of Pqiens.

signature,

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