Multiple pole switch for producing simultaneous opposite switching operations |
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| 申请号 | US3598934D | 申请日 | 1969-07-07 | 公开(公告)号 | US3598934A | 公开(公告)日 | 1971-08-10 |
| 申请人 | BLACK & DECKER MFG CO; | 发明人 | O'CONNOR WILLIAM H; | ||||
| 摘要 | A multiple pole electric switch of the type wherein different poles are respectively connected and disconnected by a single movement of the switch which includes a plurality of stationary contacts, a pluraLity of movable contacts preferably positioned to bridge a gap between a pair of the stationary contacts, and insulating projection means intermediate the pair of stationary contacts. Each movable contact includes a recess which engages the projection and an extending portion which engages one of the stationary contacts in the closed position. In the open position, the movable contact is moved so that the extending portion is lifted out of engagement with the stationary contact by the projection. At least one of the movable contacts is mounted for opposite movement relative to the remainder of the movable contacts so that the one contact opens when the remainder close and closes when the remainder open. Preferably, the extending portion of the movable contact is engaged by the projection and spaced from the stationary contact for a sufficient proportion of its movement so that, during switch operation in either direction, the initially closed contacts open before the initially opened contacts close. | ||||||
| 权利要求 | 1. A multiple pole electric switch of the type wherein different poles are respectively connected and disconnected by a single movement of the switch comprising: an insulator base; a plurality of stationary electrical contacts mounted on said base; a plurality of movable electrical contacts mounted for longitudinal movement relative to said base, each of said movable contacts having a portion arranged to be moved into engagement with one of said stationary contacts; said movable contacts and said base having cooperating camming surfaces; each of said movable contacts being movable between a first position wherein said camming surfaces permit said engaging portion to contact said stationary contact and a second position wherein said camming surfaces separate said engaging portion from said stationary contact; and means for moving at least one of said movable contacts between said first and said second positions during the same switch operation as the movement of the remainder of said contacts between said second and said first positions. 2. An electric switch as claimed in claim 1 wherein said camming surfaces include a projection from said base, a recessed portion in said movable contact, and an extending portion of said movable contact; said engaging portion comprises a part of said extending portion; said movable contact being positioned so that said recessed portion registers with said projection in said first position; and said projection separates said extending portIon from said stationary contact in said second position. 3. An electric switch as claimed in claim 1 and including means biasing said movable contacts toward said stationary contacts. 4. An electric switch as claimed in claim 1 wherein said extending portion of said one movable contact is located on the opposite side of said projection means from said extending portion of the remainder of said movable contacts whereby movement of said movable contacts in one direction causes opposite switching effects. 5. An electric switch as claimed in claim 4 wherein the stationary contacts engaged by said one and said remainder of said movable contacts are respectively located on opposite sides of said projection means. 6. An electric switch as claimed in claim 1 wherein the length of said extending portion is greater than the length of the movement of said projection means in said recessed portion and wherein, during switch movement in either direction, said projection means engages the extending portion of the initially closed contacts prior to disengaging the extending portion of the initially open contacts whereby said initially closed contacts are opened before said initially open contacts are closed. 7. An electric switch as claimed in claim 1 wherein each of said movable contacts comprises a bridge between a pair of stationary contacts, said extending portion respectively engages and disengages one contact of said pair, and another portion of said movable contact remains in sliding engagement with the other contact of said pair. 8. An electric switch as claimed in claim 7 wherein said extending portion of said one movable contact is located on the opposite side of said projection means from said extending portion of the remainder of said movable contacts whereby movement of said movable contacts in one direction causes opposite switching effects. 9. An electric switch as claimed in claim 8 wherein said means for moving said movable contacts comprises a pivot, rocker means mounted at said pivot, and means for converting rotary motion of said rocker means about said pivot into linear motion of said contacts between said positions. 10. An electric switch as claimed in claim 8 wherein the length of said extending portion is greater than the length of the movement of said projection means in said recessed portion and wherein, during switch movement in either direction, said projection means engages the extending portion of the initially closed contacts prior to disengaging the extending portion of the initially open contacts whereby said initially closed contacts are opened before said initially open contacts are closed. |
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