US1412002A - Switch mechanism - Google Patents

Switch mechanism Download PDF

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Publication number
US1412002A
US1412002A US1412002DA US1412002A US 1412002 A US1412002 A US 1412002A US 1412002D A US1412002D A US 1412002DA US 1412002 A US1412002 A US 1412002A
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United States
Prior art keywords
posts
discs
contact posts
grooves
recess
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Expired - Lifetime
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English (en)
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/16—Contacts characterised by the manner in which co-operating contacts engage by abutting by rolling; by wrapping; Roller or ball contacts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S200/00—Electricity: circuit makers and breakers
    • Y10S200/29—Ball

Definitions

  • My invention relates to switch mechanisms for electricalv apparatus. ⁇ More particularly my invention relates to sw'itch mechanisms which are'l adapted to adjust voltage ratios in stationary induction electrical ⁇ apparatus having windings provided with taps for that purpose.
  • I provide an improvedarrangement of 'parts which is simple and-rugged with all current carrying parts exposed and accessible to ventilation.
  • the contact-making parts are designed always to make line contact so as to have maxi mum current carrying capacity.
  • l employ a spherical bridging member in preference to any other form and arrange it to engage correspondingly grooved Contact posts; the bridging member in this form being capable of considerable seltadjust ⁇ ment so as to make a line in spite of slight variations in the alignment of the Contact posts.
  • Fig. 2 is a vertical'sectiorrof the mechanism shown in Fig. 1, while Fig. 3 is a horizontal section of the same mechanism;
  • Fig. f1 is a View similar to Fig. 2, but of a modified form of mechanism which is adapted to carry larger currents than theiirst form shown;
  • Figs. 5, 6, 7 and 8 are sectional, plan and detail views of another modification of my switch mechanism which is part'iciilarlyy adapted for use on the exterior of casings for electrical apparatus.
  • Fig. 9 shows a further modification ot the form of switch mechanism shown in Fi .5.
  • 10 and 11 denote respectively upper and lower discs of insulating material which are provided with contact posts 12 evenly spaced about their circiuntercnces. These contact posts preferably have reduced portions 13 extendingr through the discs l() and 11, thelower portions being provided with connecting members 14- to which lead the taps from the electrical winding whose voltage ratios are to be changed.
  • Each contact post 12 is also grooved circumferentially with a groove whose radius of curvature is the same as the radius of the spherical bridging member 15 which is mounted in and is moved by the rotatable member 16.
  • the bridging member 15 is a ball of good conductingr material and reciprocates in the cylindrical recess 20 which is formed transverse to the axis of rotation of the rotatable member 16.
  • the springr 21 Back of the ball 15 and reacting against the bottom of the recess 2() is the springr 21 which presses the ball out of the recess so that it. protrudes slightly between a pair of contact posts 12 as shown in Fi 3. at the same time forcing the ball into intimate engagement with each of the circumfercutial grooves on the Contact posts 12, thereby making complete contact throughout the arc of thergrooves. ⁇
  • the bottom of the recess 20 is preferably provided with a vent openingr 22% as shown.
  • the rotatable member l s provided with shanlrs 24 and 25 journaled in the discs 10 and ll centrally of the Contact posts l2. one such shank 25 being extended to serre as an operating shaft. a pin 26 being preferably provided for securing an operating handle to the shaft.
  • Fig. 4 I have shown au arrangement adapted for higher current carrying capacity than the form first described.
  • the rotatable member 3G carries a pluralit)V of spherical bridging members 35. three heing shown; which members reciprocate in individual recesses 40, similar to those at 20, formed in member 3G.
  • the Contact posts 3Q carried by the insulating discs hare ,'ii-cuinleren tially formed grooves which have radii of curvature corresponding respectively with those for each of the balls or spherical mein ⁇ bers 35.
  • the posts 32 are thus shown each with three grooves. the crosssectional area of the posts being niade snllieicnt to impart the desired. mechanical stillness to the con struction.
  • FIG. 5 a construction is illustrated partlcularly adapted for mounting on the cx terior of the casing containing the winding having the voltage changing taps.
  • Insulating discs 5t) and 5i are here again used to support the contact posts 5:2 which are evenly spaced about their circumferences.
  • the up )er insulating disc 5f) here, however, is ma( e larger than the lower one since it is desired to provide it with a margin adapted to support the devire. Ac cordingly, this margin has openings at which are adapted to receive bolts or other suitable means for securing the device to the casingr wall.
  • the contact posts 52 are circumferentialhv grooved as before, but are hollow and are slipped ovei ⁇ and adapted to revolve about the stationary cylindrical cores 53 which have their reduced ends- 5l secured in the discs 50 and 51.
  • a spherical bridging member or ball 55 is carried b the rotatable member 56 which is journals( centrally of the contact posts 52.
  • the lower journal of the rota table member is shown at 5T turning in a-bushing 58 secured in the disc 5]..
  • the upper journal :39 is likewise hushed and extends suflicieutlv to have a. manipulati-ngr hand-le G0 secured thereto by means of pin 6L
  • the ball 55 carried not di rertly by thexottable mem-ber but by a plunger 65.mountcd and reciprocating in the recess 66. in the rotatable member. which plunger is pressed outwardly by the spring 67 in the recess.
  • I mount it on the axial pin Illiwhich traverses an axial bore in the ball 55 and has its ends engaged with upper and lower slots T1 cut infthe-plunger 6:5.
  • the pin 70 is somewhat extended at. both ends to project' beyond the slots T1 and upper and lower annular grooves T2 arf ⁇ formed in-tlw inner 'laces of discs 50 and 5l in which the endsof the in track. These grooves need not be complte annnli where it is desired to have them discharge a stop function.
  • the contact posts 52 shall be rotatably mounted on their stationaryA cores 53, i. e. in order to reduce friction in the moving parts when tht ⁇ ball 55 i's moved to change tap coi-mec tions.
  • sliding friction in the structure is reduced to a minimum and rolling friction is substituted.
  • Fig. 5 The construction shown in Fig. 5 is adapted to have the taps from the windings secured to the contact posts 52 in a very advantageous manner.
  • thc cores 53 are made tubular. their upper Vends boing disposed in countersunk recesses formed in the upper face of the ⁇ list ⁇ :3U
  • These ends have threaded lcerfed washers it), which may be screwed down by a suitable tool, when enga 'ng the lrerf, so as to engage with and hol securely the tip end of the tap lead; the latter as shown at 77 has its terminal portion stripped and inserted up through thebore of the core 53, its ti n nall)y being bent over and brought out though the slot T8 formed in the side of the upper end of core 53, which is clearly shown in Fig. 7.
  • a switch mechanism adaptedor tap changing comprising in combination a pair of insulating discs. contact posts having circumferential grooves disposed about the peripheries of said discs. a rotatable member disposed between said discs centrally of said Contact posts. and a spherical bridging mcmher in said rotatable member and arranged lo engage with said grooves.
  • .l switch mechanism adapted for tap changingr comprising in combination a pair of insulatinpr discs. contact posts having circumferential grooves disposed about the peripheries of said discs. a rotatable member disposed between said dises centrally of said contact posts. said rotatable member having a recess. and a spherical bridginpr member mounted in said recess and arranged to engage with said grooves.
  • a switch mechanism adapted for tap changing comprising in combination 'a pair of insulating discs.
  • Contact posts having cir cumferential grooves disposed about the peripheries of-said discs, a rotatable member disposed between said discs centrally of said Contact posts.
  • said rotatable member having a recess. and a spherical bridging member resiliently mounted in'said recess having the same radius of Curvaturelas said grooves and arranged to engage successively 'eaclifpair of rzrooves as the rotatable member'is'turned.
  • a switch mechanismI adapted for tap changing comprisingin combinationa pair of insulating discs,'cont ⁇ act'posts having circumferential groovesdisposedjahout the peripheries of said discs', 'a rotatable'member disposed between said dis'cs'cnt'raliy'o'f' said contact posts and havi'ligfia reeess, a spring in the recess, ad'a sphericalb'ridgingimem ber mounted 1n sald recess reacting'against said 'spring andadaptedto ⁇ protrudei partially between a-'pa'ir ofrcontact posts and engage with their-circumferential ygrooves.
  • a switch V mechanism adapted for tap changing comprising-lin cor'nbin'ation'a pair of insulating discs,'contact posts'havin'gcircumferential grooves disposed 'abo'utithe'peripheries of said discs, afro'tatablmember disposed between said discscentrallyof said contact posts and havinga recessaspiringin the recess, a conducting l'ball in 'said lrecess'having the same radius' of curvature as said groovesreacting aga'instjsaidV spring and adapted to protrude between and bridge a pairof Contact posts in the region of their circumferential grooves.
  • a switch mechanism adaptedaeorA tap "changing1r comprising'in combination apair of insulatingdiscs, contact p osts having cir- 'cumfere'ntial grooves disposed ah'utfthe peripheries of said discs, a rotatable member disposed between said discs centrally of said contact posts and having a recess, a. spring in the recess. a plunger in the recess pressed outwardly by said spring. and a spherical bridgingT member mounted in said plunger and adapted to engage with the circumferential grooves of a pair of contact posts.
  • A. switch mechanism adapted for tap changing comprising in combination a pair of insulating discs, contact posts having circumferential grooves disposed about the peripheries of said discs, a rotatable member disposed between said dises centrally ot' said contact posts and having a recess, and a spherical bridging member axially supported in said recess and arranged to engage with the grooves in said posts, said posts arranged only for rolling;r rictional engage ment by said bridging member.
  • a switch mechanism adapted fdr tap changing comprising in combination a pair of insulating discs ⁇ contact posts having cir rumfcrcntial grooves disposed about the peripheries of said discs, a rotatable member disposed between said discs centrally of said Contact posts and having a recess, a plun er resiliently supported in said recess, an :i spherical bridging member having the same radius of curvature as said grooves axially supported by said plunger, said posts being adapted to rotate and to have their grooves engaged by said bridging member.
  • a switch mechanism adapted for tap changing comprising in combination a pair of insulating discs, Contact posts having circumferential grooves disposed about the .peripheries. of said discs, a rotatable member disposed between said dis centrally of said contact posts and ha ⁇ 'i a recess, a plunger .resiliently supportiI in saidv recess, a spherical bridging member having the same radius of curvature as said grooves, and meansifn said' plunger axially supporting saidbridging member, said contactposts liaving-'intorior cores. mounted stationary between said-dis and exterior cylindrical portions turning-on saidv cores and. adapted for rolling frictionalfengagement by said bridging member-in the region of their grooves.
  • l0..-A switch mechanism adapted' for tap' changing comprising in combination a pair o-f insulat' A discs, contact posts having circumferentlil grooves disposed about the peripheries of saiddiscs, said posts having axial hollowportions each adapted to ieeeive the endof a tap lead, a rotatable mem- -bcr disposedroentrally of said contact posts,
  • a spherical bridging member carried by said rotatable member and arranged to engage with Said conta/ct posts-inthe region of their grooves.
  • a switch mechanism adapted for tap changing comprising in combination a pair of insulating discs, contact posts having eircmnfercntial grooves disposed about the IQ- ripheries of said discs, cach o( said posts vharing an axial bolloY portion adapted lo p ostst and a spherical bridging member carf ned by said rotatable member and arranged to engage with said posts in the region of their grooves 12.
  • a switch mechanism adapted for lap changing comprising incoinbination-a pair ot insulating discs, contact posts havin,”r cirA cumfcrential grooves disposed about the peripheries of saiddiscs, said posts having hollow core portions mounted stationar)Vr between said dises, each post being adapted to receive the stripped end of u tap lead and havingouter-cylindrical portions turning freely on said core portions, a rotatable member disposed centrally of said cont-uct postsranda spherical bridging member llav- 'ing the same radins ofcurvature :is said grooves and suspended :Ixo-illy in sani :ni-
  • bridging member bein;r adapted to turn freely about such axis of suspension and engage with said contact posts in the region of their circumferential grooves, whereby there is a line contact in all operative positions between said bridging member and a pair of contact posts. there being only mllin; r friction between the parts when said bridging member is moved from one operative position to another.

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  • Arc-Extinguishing Devices That Are Switches (AREA)
US1412002D Switch mechanism Expired - Lifetime US1412002A (en)

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US1412002TA

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US (1) US1412002A (enrdf_load_stackoverflow)
FR (1) FR547094A (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2450256A (en) * 1945-07-31 1948-09-28 Trumbull Electric Mfg Co Electric switch
US2753432A (en) * 1952-04-17 1956-07-03 Gen Motors Corp Electrical apparatus
US2771530A (en) * 1953-02-09 1956-11-20 Louis P Trombetta Circuit breaker
US2903530A (en) * 1957-04-01 1959-09-08 Mc Graw Edison Co Manual tap changing switch
US2927185A (en) * 1955-11-23 1960-03-01 Gelbey Ets Electric wiring devices with simplified connecting means
US3052763A (en) * 1959-04-06 1962-09-04 Otarion Listener Corp Electric switches
US3652812A (en) * 1970-09-28 1972-03-28 Westinghouse Electric Corp Tap changer switch with radial pressurized movable contact structure
US4031345A (en) * 1974-12-18 1977-06-21 Grayhill, Inc. Miniature electrical switch
US4212208A (en) * 1977-07-22 1980-07-15 Inertia Switch Limited Vibration detector incorporating two or more seismic elements
US4496805A (en) * 1983-09-09 1985-01-29 Warco, Inc. Transformer switch
US4527022A (en) * 1984-04-10 1985-07-02 Vazquez Frank B Tap changer

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2450256A (en) * 1945-07-31 1948-09-28 Trumbull Electric Mfg Co Electric switch
US2753432A (en) * 1952-04-17 1956-07-03 Gen Motors Corp Electrical apparatus
US2771530A (en) * 1953-02-09 1956-11-20 Louis P Trombetta Circuit breaker
US2927185A (en) * 1955-11-23 1960-03-01 Gelbey Ets Electric wiring devices with simplified connecting means
US2903530A (en) * 1957-04-01 1959-09-08 Mc Graw Edison Co Manual tap changing switch
US3052763A (en) * 1959-04-06 1962-09-04 Otarion Listener Corp Electric switches
US3652812A (en) * 1970-09-28 1972-03-28 Westinghouse Electric Corp Tap changer switch with radial pressurized movable contact structure
US4031345A (en) * 1974-12-18 1977-06-21 Grayhill, Inc. Miniature electrical switch
US4212208A (en) * 1977-07-22 1980-07-15 Inertia Switch Limited Vibration detector incorporating two or more seismic elements
US4496805A (en) * 1983-09-09 1985-01-29 Warco, Inc. Transformer switch
US4527022A (en) * 1984-04-10 1985-07-02 Vazquez Frank B Tap changer

Also Published As

Publication number Publication date
FR547094A (enrdf_load_stackoverflow) 1922-11-30

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