US2095554A - Electrical disconnecting switch - Google Patents

Description

any current rating, by suitable choice of number -of floating contacts and cross-section of current carrying parts. For 1200 ampere current rating and higher, the required number of floating conf tact members can, for instance, conveniently be mounted and enclosed between two suitably spaced rectangular cross-section bars constituting the vblade member, in a manner otherwise similar to that shown for a tubular blade.

Having thus set forth and disclosed the naturev of this invention, what is claimed is:

l. An electric disconnecting switch comprising a pair of spaced circuit terminals, an insulating base therefo'n'a bar pivoted at one end to one of the terminals, the other of said terminals having rspaced portions, a pair of levers providing contact elements pivotally supported by the bar at the end portion thereof opposite its pivot, a spring tending to separate the contacts to project the end portions thereof on vone-side of the pivotal point to a plane beyond the respective adjacent side of the bar, a releasing means carried by the pivoted bar movable in one direction to first release the said contact-elements from pressure engagement with the said spaced portions 'of 4the terminal and'then turn the bar 'on its pivot,vand a' spring means normallyholding'the releasing contact elements.

` 2. An electric disconnecting switch comprising a pairof spaced circuit terminals, an insulating base therefor, a bar'vpivotedA-atg'one end to one ofthe terminals, the other of the said terminals .means fromoperative engagement with the said having opposed portions to receive the opposite 5o befmoved, a rpair of contact elements within the tube', a pivot pin for`the two'contact elements,`

I ment `with the notches, and spring means yieldably resisting movement of the lever torsdisen- Sage `the same.

Y 3. In an electric disconnecting switch, a pair of circuit terminals, a base supporting the same,

a tube pivoted at one end to`one of the terminals,

the''otherterminal having spaced portions between which theODDOSite end-of the tube may each of said contactr elements having Vopposed concave portions engaging the pin and outer convex Aportions eachA contacting the inner surface fof the tube, the ends of the contact elements adjacent the endj'of the tube having portions pro- 'jectable throughthe respective openings inthe ftubewall provided therefor, a spring between fthe' saidproject'ing portions and the pivot point tending' to turn the projectingportions outwardly, and a manually operable means carried by ythe tube having a portion insertable b etween the other ends of the contact elements to turn ythe same on V the pivot andwithdraw the said, projecting' portions' from contact with the spaced portionsr ofl n said other terminalr and turn the bar on the pivot an electric circuit, a base for supporting the same Y v,to "electrically disconnect theterminals.

4. An electrical disconnecting switch comprising a pair of. spacedterminals for connection in in fixed relationship, a contact member hinged n at one end to one of the said terminals, pivotally supported contact elements in the opposite end of the contact member, the terminal forthe said end having spaced contact portions having outwardly and oppositely inclined terminal ends, a spring tending to separate the said contact elements on one side of the pivotal point and to project end portions thereof respectively beyond the plane of the respective adjacent sides of theysaid f hinged contact member. said spaced terminals contact member to beturned on its hinge point,

and spring means tending to hold the releasing element from operative engagement with the contact elements. v

5. In an electric vdisconnecting switch, apair ofA circuitterminals, an insulating base therefor, a tube pivoted at one end to one of the terminals, the other, terminal having opposed spaced portions providedwith notches between which the opposite end of the tube may be moved, a pair of contact elements pivotally supported in said opposite end of the tube, saidtube having opposed openings through which 'portions of the contact elements may4 respectively be moved, a spring` tending to move the vsame to projected position and to engage in the notches when the said end` ofthe tube and contact elements are moved between-said spaced portionsv of said other terminal, said contactelements each having portions in engagement with the tube when in the projected position, and a` releasing means comprising a lever pivoted to the tube and having a portion extending through an aperture provided therein to the interior thereof, the portion in the interior of the tube having a part engageable between the ends of the pivoted 'contact elements ,to withdraw the same from engagement with the notches, the arrangementdbeing such that the hand of theoperator in actuating the lrelease mechanism applies pressure to the tube whereby upon release of the contact elements' the tube is turned on its `pivot and electrically disconnects the said terminals.

vments in the tubular bar adjacent one end, a

pivot lpin therefor, said contact elements each Vhaving a portion forward of the pivot and the tubular bar having openings through which said forward portions` may vextenda spring tending to move the said portions'of ythe contact elements outwardly on'opposite vsides of the tubular bar to project beyond the surface of the tube, the said contact elements having similar end portions rearwardly of the pivot formed with oppositely inclined V surfaces, each contact element having a concave arcuate portion on the respective opposite sides of the pivot pin and having convex arcuate portions on the outery faces normally engaging the inner wall of the tubular bar at 'any point of pivotal movement of the contact elements therein, said spaced portions of said other terminalhaving notches below the throat of the opening beneath which the contact 'elements engage when the tubular -bar is moved to position the same therein, a release element pivotedtouthe exterior ofthe tubular bar and having e a portion extending -thereinto formed with a `surface to engage between the inclined surfaces of the contact elements whereby the said elements through'operation of the release member are withdrawn from the notches there- "by permitting the tubular'bar to `be `swung on its pivot bythe strain imposed" vthereon in releasing the contact elements. e ,i t

7. `Anelectrical disconnecting `switch compris- `ing a terminal for connection inan electric circuit, a contact member hinged at Vone endthere-` to, a pair of spaced terminals lfc'nftheother, end of the contact member havingy outwardly/turned ends" to` receive the` same, ajpairof contact elements pivotaily supported by the contactmember, a spring tending to pressthe contact elements outwardly `in opposite directions thereby causing portions of the same on one `side of the pivotaipoint thereof to project beyond the respective faces ofthe Contact member whereby, in turningthe contact member to closed position, thefsaid contact elements engage between the spaced terminals,` said contact elements Von the opposite side of the `pivot point terminating respectively in opposed inclined faces forming a V space therebetween, `and areleasing member pivotally `supported `by the `contact member` and having a"V shaped end portion aligned with the said V spacewhereby on manually turning the same inone direction the contact elements are turned `to disengagement with the said spaced terminals and permitting the contact member to `be freely `turned on itspivot. e l

8.*An `electrical disconnecting switch `comprising a terminalfor connection in an electric circuit; a contact memberhinged at one endthereto, a-pair of spaced terminals for the other` end ofthe contact member having outwardly turned ends to receive the same, a pair of contact elements pivotally supported by the Contact member, fa spring tending to" press the contact elements outwardlyin opposite directions thereby causing"`portion`s` of the same on one side of lthe `pivotal point thereof toproject beyond the re-` spectivefaces of the contact member whereby, in turning thecontact `member to closedjposition,` the said contact elements engage between the spacedterminalsgsaid `contact elements on `the opposite side ofithepivot point terminating respectively in opposed inclined faces forming a V, space therebetween, and a'releasing` member pivotally supported bythe contactmember andA having a V shaped end portion aligned with the said V space whereby on manually turning fthe 'same in one direction` theicontact elements are turned to disengagement with the said spaced terminals andpermittinggthe contact member to be freely turned on its'pivot, and spring means tendingfto hold saidfvtshaped end portion of the releasing member `out of operative relationship withtthe said inclined faces of the contact elements` l l f V 9. An electrical disconnecting switch, comprising 'a stationary contact member, a conventionally hinged blade member, an auxiliary contact assembly, consisting of members, pivotally supported and mounted within the free end of the blade memberin such a way that a conducting and self aligning bridge, is formed between the stationary contact member and the movable blade member when the switch is closed, the closing operation automatically causing a sliding movement atthe contact surfaces under high unit pressure for the purpose-of cleaning the said surfaces; Aprojections on the said pivotally supported members for lautomatic latching with corresponding projections on fthe stationary contact member when the switch is in the closed position to prevent accidental opening;` means for actuating the saidpivotally supported contact members to release the Contact pressure between the member and the stationary contact member and 4unlatch the blade member permite ting free opening of the switch without hindrance from contact friction or sticking due to freezing or other atmospheric conditions.

`10. An electric disconnecting switch comprising al pair ofspaced circuit terminals, anvinsulating base therefor, a bar pivoted at one end to one of theterminals, theother of said terminals having` spaced portions, a pair of levers providing` contact elements pivotally supported by the bar at the end portion thereof opposite its pivot, a. spring tending `to separate the contacts to project the end portions thereof Vonione side of the pivotal point to a planebeyond the respectiven adjacent side of the bar, and a releasing means carried by the pivoted bar movable in one direction to first release the said contact elements `from pressure `engagement with the said spaced portions of the terminal and then turn the` bar on its pivot.

11. In an electrical disconnecting device,`a separable mechanism comprising a receiving terminaL having `spaced portions and a hollow bar lof"`electrical1y` conducting material ,having oppositely disposed openings, a` pair of contact elements positioned within the hollow bar member, said contact elements each having a portion thereof contacting the inner surface ofthe hollow gbartand a portion spaced` therefrom and projecting outwardly through the respective opening in the `hollow bar `and contacting the respective portion of the receiving terminal whenin-closed position, and `a spring between the` contact elements pressing the same respectively outwardly to `engage the respective spaced portions of the receiving member, the said contact elements under the spring pressure each forming a self-aligningv conducting bridge be- `tween.the respective portion of the receiving memberand the said hollow bar member.

OLAV MASENG,

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