US1138800A - Circuit-breaker. - Google Patents

Description

w. M. SCOTT.

cmcun BREAKER.

APPLICATION FILED 1AN3\|I912. 1,138,800. Patented May 11, 1915.

2 SHEETS-SHEET l.

AZMQ/fa NVM/meme JZZM THE NORRIS PETERS CO., PHOTO-LITHO., WASHINGTON. D. C.

f/W' a Mgg-255% W. M. SCOTT.4

CIRCUIT BREAKER. M PLICATION FILED JAN. 31| l9l2. 1,138,800.y Patented May11,1915.

a 2 SHEETS-SHEET 2. .f/ 63 67 'n wals v1/mm... I i Z y f ,2/ 2 awww! THE MORRIS PETERS C0.,PHOTc-L1THO., WASHINGTON. D. CA

. ing is a spe'ciication. Y

1,138,8oolf T0 all/whom it may concern:

Be it known., that I, WILLIAM M. SCOTT, a citizen of fthe. United States, residingfin` Berwyn, in the county of Chester and State 1 offPennsylvania, have invented anew anduseful CircuitiBreaker, of whichthe follow- My invention relates .toY electric switches, and Vmore particularly 'to electricv switches which are latched or locked in normal position andsuitably controlledfto unlat'ch`v orl unlock them.` l i More particularly my` invention relates to automaticcircu'it breakers-f,

My invention resides in anelectric s itch `or circuitVbreakerI-andits trippingjmecha-- jnism, and Vresides moreparticularlyin means preventing the Vimmediate tia'ctuati on of the. tripping mechanism, as'astart delaying device of the characterfshownancl'described in Letters Patent of 4theUnited States. No.j

830,537, September 11,1906;

.It is the" bject of my inventionto provide?` v means whereby the .advantages of start delaying device of the character `referred to,

.. may be obtained, without derangement'of the same as by the effect of dust or other material. Tothisend I provide a. start-,de-

laying device,A which is Apractically hermeti- Vcally sealed `against the `outer air preventing dustor other` undesirable material reaching `the functioning parts-of the start delaying The vinvention hereimd'escribed is also applicablefto retarding devices in general.

. My invention resides `iii-the features` hereinafter described. and claimed. n. Y f

. For an illustration of' one of the forms my invention may take, reference is to bey had Figure lis a side elevationalviewof an automatic circuit breaker embodying my in-- tothe accompanying drawings, in which:

' vention. `l1`ig.2 isa frontjelevational view tripping mechanism and'associated start dev. laying device.y .`Fig. 4 isa horizontal. sectional View through kthe start delaying device withsome Vof the attached partsshown of the same. Fig.` '3. is aside. elevational view, some' parts in section,`of'V apart of the in plan and also in substantially horizontal section., Fig. l5 isa front; elevational view "ofthe mechanism shown in Fig...3, 'some Vparts being-shown in vertical section.

Referring -to the `'drawing/s, upona base 1 of suitable insulating material, suchas slate or marble, are securedthe terminalblocks2 Y ciiacUIT-BREAKER.

and 3 of copperfor other, good conductor. Adapted to bridge and electrically connect thesecontacts 2 and 3 is the member 4 representing a laminated bridging member, the member41being secured upon the arm 5 piv-y otedy tothe housing 6 at 7 .,q'lhearm 5 carries also the movable kintermediate metallic' 'shunt contact -8 and thev movable "carbonV shunt contact 9' which engage respectively with the .stationary shunt Vmetallic contact 1Q and theshunt carbon contact `11, these f shunt contacts openingin succession after the* bridging member 4 leaves contacts2 and 3, the final arc taking placefbetween the contacts 9 and 11. l,P ivoted at 12in the housing 6 is the opy e ySpeeiication of Letters latcnti. i Patlltd May 141, 1915. i. apliiiationfied January 31,1912. seri-ai No. 674,546.` Y

erators lever 13V having the usual gripgor i i handle 14 and extending tothe othersi e yof the Vpivot 12 forming one, link of ajtoggle,

At 15 upon the lever 13 is pivoted a lsecond .'Qggle... link .16 having astop surface 17 a short toggle link 22-pivoted at y23 to the 1 adaptedto engage the stop surface 18 upon the lever-13.l The link 16-is pivoted at 19 vtothetoggle link 2O pivoted at 21 in the housing -6 which housing is securedfupon the -base 1. Also pivoted uponfthe pivot 19 is lug 24 upon the arm 5 to which the bridg-` f ing. member 4 is secured. 4Freely and independently pivoted on the-I member 13 at 15 is the tripping 'lever 25,? bearing against the@ roller 261p`ivoted at 27. Also pivoted on 27 is the actuator 28 movable with which isthe lever 29Y carrying the projection or nose 30 adapted to .engage and lactuate thelever 25.

The member'28Y extends intothe downward path of travel` of thetail 31 on the 'armature lever 32 pivoted at 33, the armature 34 being secured at the end-0f the lever 32. Sui"-YV rounding. the; lower contact. 3 Aor the stud connecting therewith "is` the 'iron mass 35 havinglpoles 36 adaptedto attract the armature V34,when the` currentV passing `through the contact 3 or .the studg leading thereto' reaches a predetermined value. Independently of the. armatureleverf32V there is pivoted Upon 33 the bifurcatedV lever 37 to each arm or legofwhich is .pivoted on the kaxis i 38-anv arm ,or rod .39 extending downwardly,

to the cover, of .the ,start delaying device V these rods being secured at their lower ends" hereinafter described, and as shown in Fig. f

5. The rod 40 by which'the pull exerted by the armature 34 transmitted to the movable sucker elementlater described, is pivj otedlzat itsupper end; to the armature lever secured upon the shaft or pivot 44. The levers 43 are disposed on opposite sides of the chamber 45 which is provided with the cap 46 at its right hand end, as viewed in Fig. 3. The cap 46 and the end of the chamber 45 form air-tight and dust-tight bearings for the shaft-44 which extends through the end of the chamber 45 just inside of the cap 46.- lnside of the chamber`45 there is secured to` the shaft 44 the lever 47 pivoted at its other end at 48 to the vertically extending memiber 49 integral with or secured to the member 50 upon which is pivoted'the ring member 51 on the pivots 52, 52. At right angles to the pivotal axes 52, 52 is a second pivotal axis on which the movable sucker element y53 is pivoted at 54 to the ring member 5l. The sucker element 53 is, therefore, supported upon the member 49 but it is connected thereto through two pivotal axes at right angles to each other, thus giving a univer- Y sal or gimbals connection therewith.

This allows the sucker element 53 to perfectly and nicely adjustvitself with the stationary sucker element 55 whose upper surface is the active sucker surface of the stationary ele` ment, the member 53 having raised portions on its lower surface which are suitably finfished or prepared as indicated at 56, the

surfaces on the parts 56 engaging the surface of the member 55 as explained in prior' U. S. Patent No. 861,611, July 30, 1907. The lower sucker element'55 is in the bottom of the main casing 57 which at its upper end has the outwardly extending flange 58 between which and the cover 59 is provided suitable packing ring or gasket 60, if desired. The cover 59 is internally screwthreaded at 6l to receive the screw-threaded ring 62, the flange 58 extending over the screw-threaded flange on the ring 62 and being rotatable relatively to the ring 62 and tothe cover 59 by handle 63 attached to the cup or casing 57. By thus rotating the cup 57 which carries the relatively stationary sucker element, the amount of surface coacting between the stationary and movable sucker elements may be varied as and for the purposes described in said prior patent No. 861,611. The rods or members 39, heretofore referred to, are fastened at their lower ends to the cover 59 as shown in Fig. 5. Vithin the member 49 is arspiral spring 64, under compression, exerting a. downward pressure upon the head 65 upon the member 66, thus thrusting against the member 53. By this means lost motion between the member 53 and the member 49 and the parts, as lever 47, etc., attached thereto, is prevented so as to maintain the calibration of the instrument, and any lost motion between these parts, though relatively slight, would enable the early movement or attraction of the armature 34 in taking up such lost motion to deliver a force in the nature of a hammer blow tothe sucker element 53 tending to lift it or separate it from the stationary sucker element improperly, that is, before the overload or other electrical condition had existed for the desired time or for other degree of overload or other electrical condition to which the apparatus is intended to respond. The left ends of the levers 43, as viewed in Fig. 3, are connected by a pivotal shaft 67 to which is pivoted the lower end of the member 68 within which engages the rod 69 pivoted at 70 to the armature-lever 32. Inside of the member 68 is the spring 71 under compression, tending to hold the pivots and 67 separated and therefore holding lever 32 and levers 43 apart, thus further preventing lost motion between the armature 34 and the levers 43 and attached parts, as at pivots 38 and 42.

On opposite ends of a diameter of the cover 59 are provided thecoaxial pivots 7 which engage in slots 73 in the stirrup members 74 attached to the housing 6. These pivots 72 and slots 73 allow vertical adjustment of the cup 57 and attached parts for different initial or normal positions of the armature 34, which, as well understood, must be adjusted to different Vpositions or diHerent distances from the poles 36 so as to respond to different current strengths through the circuit breaker. This adjustment of the armature 34 for different electrical conditions to which the breaker is to respond is procured by the handle 75 which moves in a horizontal slot in the member 7 6 and carries at its inner end member 77v which has a projection 78. This projection 78 moves in an inclined slot in the member 78a which member isrigidly attached to and forms part of the bifurcated lever 37 pivoted at 33. By moving this handle 75 in one direction or the other in its horizontal slot the projection 78 moves correspondingly in the inclined slot in member 78a which slot slants upwardly and downwardly, the member 78al and, therefore, the lever 37, is moved upon its pivot 33 and in so doing raises or lowers the rods 39 thus raising or lowering the start delaying device as awhole. This also adjusts the armature 34 to different distances from the poles 36, so that the breaker shall respond to different electrical conditions fer which the armature 34 may be set. The construction is vsuch that both the armature 34 and the lever 37 are moved to like or proportional extents, so that for whatever adjustment of the armature 34 for different load or electrical conditions the start delaying device as a; whenV nieves with a, soV .that ytima-'Simii be no .relative movement which wouldV otherwise separate the sucker elements or prevent their ,properY .coaction.,

- What I claim'. is

l.V The combination ywith electro-respon-v sive means vhaving a movable member, of

' relatively fixed and movablesucker elements Vnormally in adhesive lcontact withy each other, a positive jointed mechanical. connection between said movable member of said electro-responsive means and said movable sucker element, Vand, meansV acting between said movable sucker element andisaid mov-" able-member. through said jointed connec-v tion to hold the same at maximum distance 1 from each other while saidsucker elements -are'incontact with each other, whereby said ments lis prevented.

' connection .between said hollow member and said movable sucker element, a pivoted con- V nectionk between said vhollow member and'` movable member is prevented Afrom moving in `advance of said sucker elementV duetoi lostniotion in. said jointed connection and premature separationiof said suckerele- -f2.'-.The comb'nationv with electro-responsive means havinga movable-member, of relatively iiXedV and movable sucker Velements normallyfin adhesive contact with each i' other, a gimbal connection between the movable member of said electro responsive meansfandsaid movable sucker element, and', a spring thrusting against said movable sucker element andthe remote element'pf said gimbal connection, whereby less than predetermined f orceapplied to said movable member is.. prevented from separating ysaidsucker elements by Vadvance movement diie to .lost motionin said gimbal connection.

3. 1 The combination with electro-responsive means having a movable memberfof'a sucker comprising relatively fixed'and movable elements normallyI infadhesive contact with each other, a hollow member, a gimbal the "movable member of said electro-responsive means,and a springiwithin said hollow memberv thrusting against said hollow .meinbei? and said movable sucker element, whereby-lessthan pre-determined force applied to said hollow member is prevented fromsepav rating said suckerY elements by advance l movement-due to lost rmotion in said gimbal .w

connection.

4;.The combination with Velectro-responsive means having` a movable `member, a sucker comprising relatively fixedvandmovable elements lnormally invadhesive contact with eachother, a housing closed to the atmosphere inclosing said sucker, said fixedv sucker element being in fixed relation with respect to said housing, means foradjusting said housing and said movabley member of' said electro-responsive means in definite relation with respect to eachother, and a connection from said Vmovable member of said electro-responsive means through a wall of said housing to said movableA sucker element.V y

y 5. The combination u with electro-responsive' means having a movable member, of aysucker comprising relatively fixed and movable elements normally in adhesive contact with each other, a movable housing closed' 'to the; atmosphere inclosiiig said sucker-elements infiXed relation with respect tosaid fixed sucker; element, a member extending throughfa wall.4 of` said housing, pivoted connection outside of said housingbetween said member and saidj movable member ofV said electro-responsive means, a pivotal connection between said memberand said movable sucker element within-'said housing,

and means for .taking 'up lost motion between the movable member of said electro-vv responsive means and said movable sucker element.'v n ffy 6; The combination kwith a movableelej ment, of a sucker comprisingrelatively fixed and movable elements normally .in adhesive contact with each other, ahous'ing closed to the atmosphere inclosing said sucker,`-said 1 housing comprising relatively rotatable cup and cover, said fixed (sucker `element being iniixed relation with-said cup, anda pivot I extending through a wallofsaid cover connecting said movable element to said movable suckerv element, rotation of said cup with respect to said cover serving to adjust Vthe 4coperatingy areas of said Lsucker elements. l j

7. The combination with a `movable element, of `a sucker comprising relatively fixed and movable elements normally in adhesive contact' with eachother, a housing closed to the atmosphere inclosing said sucker, saidv housing comprising relatively lrotatable cup and cover, said xed sucker'element being" in fixed relationwith said cup, a pivot eX- tending Vthrough a wall of said cover connecting said movableV element to said mov- `able sucker element, rotation .of said cup l with respect to said cover serving to adjust the coperating areas of-fsaid sucker elements, andmeans for adjusting the posi'- tions of said movable element and said housing indefinite relation withrespect toeach 9.l ln :apparatus of the character del scribed, ther-combination with a movable member, ofV a sucker comprising relatively fixed andmo'vable elements, a housing for said sucker closed to the atmosphere and comprising a cup and cover, the fixed sucker element movable with said cup with respect to said cover, and a rock shaft extending through a wall of said cover and connecting said movable member to the movable sucker element.

10. In apparatus of the character described, the combination with a movable member, of a sucker comprising relatively fixed and movable elements, a housing for said sucker closed to the atmosphere and comprising a cup and a cover, the fixed sucker element being rotatable with said cup with respect to said cover, said movable sucker element remaining in fixed relation to said lcover respecting rotation relative to said iixed sucker element, and means extending through a Wall of said cover connecting said movable member with said movable sucker element.

11. In apparatus of the character described, the combination with a movable member, of a sucker comprising relatively fixed and movable elements, a housing closed to the atmosphere inelosing said sucker elements, and a pivot extending through a wall of said housing at right angles to the direction of movement of the movable sucker element connecting said movable sucker element with said movable member.

12. In apparatus of the character described, the combination with a movable element, of a sucker, a housing closed to the atmosphere inelosing said sucker, a shaft extending through the wall of said housing, a connection from the movable element of said sucker to said shaft within said housing, and a connection from said shaft to said movable element outside of said housing. A

18. In apparatus of the character described, the combination with a movable element, of a sucker, a housing closed to the atmosphere inelosing said sucker, a member extending through the wall of said housing, a connection from the movable element of said sucker to said member within said housing` and a connection from said memberto said movable element outside of said housing.

11. In apparatus of the character described, the combination with a movable element, of a sucker, a housing closed to the atmosphere inelosing said sucker, a member extending through the wall of said housing, a lever outside of said housing connected to said member and to said movable element, and a lever inside of said housing connected to said member and to the movable sucker clement.

15, ln apparatus of the character described, the combination 'with a movable element, of a sucker, a housing closed to the atmosphere inelosing said sucker, a rock shaft extending through the Wall of said housing, a lever secured to said rock shaft within said housing, the movable sucker element pivoted to said lever, and a lever secured to said rock shaft outside of said housing and connected to said movable element.

16. In lapparatus of the character described, the combination with a movable element, of a sucker, a housing closed to the atmosphere inelosing said sucker, a rock shaft extending through the Wall of said housing, a lever secured to said rock shaft within said housing, the movable sucker element pivoted to said lever, a lever connected to said rock shaft outside of said housing, and a member pivoted to said lever and to said movable element.

17. In apparatus of the character described, the combination with a movable element, of a sucker, a housing closed to the atmosphere inelosing said sucker, a rock shaft extending through the wall of said housing, a lever secured to said rock shaft Within said housing, the movable sucker element pivoted to said lever, a lever connected to said rock shaftfoutside of said housing, a member pivoted to said lever and to said movable element, and means outside of said housing connected to said movable element and to said last-mentioned lever for preventing lost motion.

18. In apparatus of the character described, the combination with a movable element, of a sucker, a housing closed to the atmosphere inelosing said sucker, a rock shaft extending through the wall of said housing, :i lever secured to said rock shaft within said housing, the movable sucker.

element pivoted to said lever, a lever connectcd to said rock shaft outside of said housing, a member pivoted to said lever and to said movable' element, and a resilient connection outside of said housing between said last-named lever and said movable element for preventing lost motion.

19. In apparatus of the character described, the combination with a movable element, of a sucker, a housing closed to the atmosphere inelosing said sucker, a rock shaft extending through the wall of said housing, a lever secured to said rock shaft within said housing, the movable sucker element pivoted to said lever, a lever connected to said rock shaft outside of said housing, a member pivoted to said lever and to said movable element, a resilient connection outside of said housing between said last-named lever and said movable element for preventing lost motion, and means inside of said housing for taking up lost motion between the movable sucker element and said first-named lever.

20. In apparatus of the character described, a sucker comprising relatively fixed and movable elements normally in adhesive contact with each other, a housing inclosiug said sucker and comprising a cup and a cover, the relatively fixed sucker element being in fixed relation with said cup, and said cup movable with respect to said cover for adjusting said sucker elements with respect to each other.

21. In apparatus of the character described, a sucker comprising relatively fixed and movable elements, a housing inclosing said sucker elements and comprising a cup and a cover, said relatively fixed sucker element being in fixed relation with said cup, and a connection between said cup and cover permitting rotation between said cup and said cover for adjusting said sucker elements with respect to each other comprising a member secured to said cover, and a flange on said cup intervening between said member and said cover.

22. In apparatus of the character described, a sucker comprising relatively fixed and movable elements, a housing closed to the atmosphere inclosing said sucker elements and comprising a cup and a co'ver, the relatively fixed sucker element being in fixed relation with said cup,'a connection between said cup and cover permitting rotation of said cup with respect to said cover fory adjusting said sucker elements with respect to each other, and a 'mechanical connection from saidmovable sucker element through a substantially air tight joint in the wall of said cover.

23. In apparatus of the character described, the combination with a movable element, of a sucker comprising relatively xed and stationary elements, a housing inclosing said suckerelements and comprising a/cover and a cup rotatable with respect to said cover, a shaft extending through the wall of said cover, a connection from the relatively movable sucker element to said shaft within Vsaid housing, and a connection from said ment, of a sucker comprising relatively fixed v and stationary elements, a housing inclosing said sucker elements and comprising a cover and a cup rotatable with respect to said cover, a shaft extending through the wall of said cover, a connection from the relatively movable sucker element to said shaft within said housing, a connection from said shaft to said movable element outside of said housing, and means for simultaneously adjusting the position of said movable element and said housing. 26. In apparatus of the character described, the combination with a movable element, of a sucker comprising relatively fixed and movable sucker elements, a housing inclosing said sucker elements and comprising a cover and a cup rotatable with respect to said cover, a member extending through the wall of said cover, a lever outside of said housing connected to said member and to said movable element, a lever inside of said housing connected to said member and to the movable sucker element, andmeans for simultaneously adjusting the position of said movable element and said housing.

In testimony whereof I have hereunto affixed my signature in the presence of the two subscribing witnesses.

WILLIAM M. sooTT.

Witnesses:

N. F. WHELAN, C. V. HEENAN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

i Washington, D. C.

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