Combination electrical control

申请号 US3622929D 申请日 1964-01-08 公开(公告)号 US3622929A 公开(公告)日 1971-11-23
申请人 CTS CORP; 发明人 BARDEN WAYNE A; ARISMAN MERVIN B;
摘要 A combination electrical control having a variable resistor, a pull-push switch and an overload circuit breaker connected in tandem and having a common actuator shaft. The shaft may be rotated to alter the resistance of the variable resistor. The pull-push switch and the circuit breaker may be closed or reset when the shaft is pushed or pulled. The overload circuit breaker and the pull switch are connected in series so that the opening of either component breaks a circuit.
权利要求
1. In a combined electrical control, the combination of a housing, a switch disposed in the housing having a pair of stationary contacts and a bridging contactor engageable with the stationary contacts, means mounting said bridging contactor for snap action movement in a direction opposite to the direction of movement of the shaft, an overload circuit breaker disposed in the housing having a stationary member and a bistable movable member, said bistable movable member being movable between an open position out of engagement with said stationary member and a reset position engaging said stationary member, means for moving said bistable movable member to said reset position after said bridging contactor has been spaced from one of said pair of stationary contacts, said means for moving including a shaft journaled in the housing for rotatable and reciprocable movement, said bistable movable member being operatively engageable by the shaft, means mounting said shaft for reciprocable displacement between first and second stable positions, movement of said shaft to said first stable position bringing about movement of said bridging contactor into electrical engagement with sAid stationary contacts to close said switch, movement of said shaft to said second stable position electrically disconnecting said bridging contactor from said stationary contacts to open said switch, said bistable movable member in said reset position being responsive to an electrical current exceeding a predetermined value to move from said reset to said open position, movement of said shaft to said second stable position moving said bistable movable member from said open position to said reset position if said bistable movable member is in said open position.
2. In a combined switch and circuit breaker, the combination of a housing, a first supporting member disposed in the housing, a pair of stationary contacts fixedly secured to the supporting member, a bridging contactor adapted to move into and out of engagement with the stationary contacts for opening and closing a circuit, a rotatable shaft disposed in the housing for limited axial movement, means mounting said bridging contactor for snap action movement in a direction opposite to the direction of movement of the shaft, a switch actuator carried by the shaft for moving the contactor into and out of engagement with the stationary contacts upon axial movement of the shaft, the shaft being adapted to rotate and move simultaneously the actuator regardless of the angular position of the shaft, a second supporting member in spaced relationship to the first supporting member, a stationary member fixedly secured to the second supporting member, a bimetallic member having one end fixedly secured to the second supporting member and a free end provided with means for engaging the stationary member, the bimetallic member being operatively associated with the shaft, and means for moving said bimetallic member into engagement with said stationary member after said bridging contactor has moved out of engagement with one of said pair of stationary contacts whereby upon movement of the shaft axially in one direction the switch actuator carried by the shaft moves the contactor away from the stationary contacts to open the switch and simultaneously the shaft urges the free end of the bimetallic member into engagement with the stationary member for resetting the circuit breaker and upon movement of the shaft in the other direction the switch actuator moves the contactor toward the stationary contacts to close the switch.
3. In a combined electrical control, the combination of a housing; an axially movable shaft journaled in the housing; a pull-push switch disposed in the housing comprising a stationary contact, a bridging contactor, and a switch actuator operatively associated with the axial movement of the shaft for urging the bridging contactor into and out of engagement with the stationary contact; means mounting said bridging contactor for snap-action movement in a direction opposite to the direction of movement of the shaft, an overload circuit breaker disposed in the housing comprising a stationary member, and a movable member engageable with the stationary member and disengageable from the stationary member in response to an overload condition, and means for moving said movable member into engagement with said stationary member after said bridging contactor has moved out of engagement with one of said pair of stationary contacts whereby after the movable member is disengaged from the stationary member of the overload circuit breaker movement of the shaft axially in one direction resets the circuit breaker, such movement disconnecting the bridging contactor from the stationary contact of the switch.
4. In a combined electrical control, the combination of a housing; an axially movable shaft journaled in the housing; a pull-push switch disposed in the housing comprising a stationary means connectable to one side of the circuit, and a movable means operatively associated with the shaft for electrically connecting the stationary means to the other side of the circuit; means mounting said movable means for snap-action movemeNt in a direction opposite to the direction of movement of said shaft; an overload circuit breaker disposed in the housing comprising a stationary member, and a bimetallic member having a one end in spaced relationship to the stationary member and a free end engageable with the stationary member upon axial movement of the shaft; and means for moving said bimetallic member into engagement with said stationary member after said movable means has moved out of engagement with one of said pair of stationary contacts, the coaction of the shaft with the movable means of the switch and the bimetallic member of the overload circuit protector being such that to reset the circuit breaker with axial movement of the shaft in one direction the movable means of the switch is disconnected from the stationary means and upon movement of the shaft in the other direction to close the switch the shaft is so disposed with respect to the circuit breaker as to permit the free end of the bimetallic member to become disengaged from the stationary member in response to an overload circuit condition.
5. The combined electrical control of claim 4 wherein the bimetallic member is a C-shaped bimetallic member having one end of the C in fixed spaced relationship to the stationary member and the other end of the C forming the free end thereof engageable with the stationary member.
6. A combination electrical control comprising a housing; a shaft rotatably and axially journaled in the housing; a variable resistor disposed in the housing comprising a resistance element, and means operatively associated with the rotatable movement of the shaft for wiping the resistance element intermediate the ends thereof; a pull-push switch disposed in the housing in tandem to the variable resistor comprising a pair of stationary contacts, a bridging contactor, and a switch actuator operatively associated with the axial movement of the shaft for electrically urging the bridging contactor into and out of engagement with the stationary contacts; and an overload circuit breaker disposed in the housing in tandem to the variable resistor and the pull-push switch comprising a stationary member, a C-shaped bimetallic member having a fixed end in spaced relationship to the stationary member and a free end engageable with the stationary member, means electrically insulating the end of the shaft from the bimetallic member of the overload circuit breaker, the overload circuit breaker being resettable upon movement of the shaft in an axial direction into the housing regardless of the setting of the variable resistor, and means for moving said bimetallic member into engagement with said stationary member after said bridging contactor has moved out of engagement with one of said pair of stationary contacts, the movement of the shaft axially into the housing simultaneously disconnecting the bridging contactor from the stationary contacts to open the switch and resetting the overload circuit breaker by urging the bimetallic member into engagement with the stationary member and upon moving the shaft axially in the other direction to close the switch the shaft is disposed with respect to the bimetallic member to permit the overload circuit breaker to open in response to an overload circuit condition.
7. A combination switch and circuit breaker arrangement for the power-supply system of a television receiver, or the like, comprising: an on-off switch having a fixed contact and a movable contact shiftable along a predetermined path between an open position and a closed position in which it engages said fixed contact to establish an electrical connection through said switch; a circuit breaker effectively connected in series relation with said switch contacts, said circuit breaker comprising a first terminal and a bistable second terminal shiftable along a predetermined different path between an open position in which it is out of engagement with said first terminal and a reset position in which it engages said first Terminal and responsive, when so engaged, to an electrical current exceeding a predetermined value to shift from said reset to said open position; and a bistable actuator displaceable between first and second stable positions comprising an operator engageable with said movable switch contact for shifting said movable contact along its said predetermined path between its said open position and its said closed position to establish said electrical connection in said first stable position and to open said electrical connection in said second stable position of said actuator, means mounting said movable contact for snap action movement in a direction opposite to the direction of movement of the actuator, said actuator further comprising a driver engageable with said bistable terminal for shifting said bistable terminal along its said predetermined different path to its said reset position, in response to displacement of said actuator to said second stable position, after said movable switch contact shifts to its said open position if, at that instant, said bistable terminal is in its said open position.
8. A combination switch and circuit breaker arrangement for the power-supply system of a television receiver, or the like, comprising: an on-off switch having a fixed contact and a movable contact shiftable along a predetermined path between an open position and a closed position in which it engages said fixed contact to establish an electrical connection through said switch; a circuit breaker effectively connected in series relation with said switch contacts, said circuit breaker comprising a first terminal and a bistable second terminal shiftable along a predetermined different path between an open position in which it is out of engagement with said first terminal and a reset position in which it engages said first terminal and responsive, when so engaged, to an electrical current exceeding a predetermined value to shift from said reset to said open position; and a bistable actuator displaceable along its principal axis between first and second stable positions comprising an operator engageable with said movable switch contact for shifting said movable contact along its said predetermined path between its said open position and its said closed position to establish said electrical connection in response to axial displacement of said actuator to its said first stable position and to open said electrical connection in response to axial displacement of said actuator to its said second stable position, said actuator further comprising a driver engageable with said bistable terminal for shifting said bistable terminal along its said predetermined different path to its said reset position, in response to axial displacement of said actuator to said second stable position, after said movable switch contact shifts to its said open position if, at that instant, said bistable terminal is in its said open position.
9. A combination switch and circuit breaker arrangement for the power-supply system of a television receiver, or the like, comprising: an on-off switch having a fixed contact and a movable contact shiftable along a path normal to a reference axis between an open position and a closed position in which it engages said fixed contact to establish an electrical connection through said switch; a circuit breaker effectively connected in series relation with said switch contacts, said circuit breaker comprising a first terminal and a bistable second terminal shiftable along a path parallel to said reference axis between an open position in which it is out of engagement with said first terminal and a reset position in which it engages said first terminal and responsive, when so engaged, to an electrical current exceeding a predetermined value to shift from said reset to said open position; and a manually operable bistable actuator displaceable along said reference axis between first and second stable positions comprising an operator engageable with said movable switch contact for Shifting said movable contact along its said normal path between its said open position and its said closed position to establish said electrical connection in said first stable position and to open said electrical connection in said second stable position of said actuator, said actuator further comprising a driver engageable with said bistable terminal for shifting said bistable terminal along its said parallel path to its said reset position, in response to displacement of said actuator to said second stable position, after said movable switch contact shifts to its said open position if, at that instant, said bistable terminal is in its said open position.
10. An overload-protected electric switch comprising a housing, a pair of fixed electric contacts inside the housing, one of said contacts being a circuit breaker contact, a thermally responsive bimetallic conductor strip secured at one end to the other contact, the strip having a laterally projecting contact end normally hooked onto said breaker contact, said strip being adapted to bend and spring away from the breaker contact when overheated by excessive electric current flowing therethrough, a third fixed contact beside one of said pair of fixed contacts, a movable bridging contact in the housing, a control shaft for moving the movable contact into and out of engagement with said third contact and the fixed contact beside it, a resilient reset strip extending lengthwise of the conductor strip along the side thereof remote from said circuit breaker contact, means in the housing anchoring one end of the reset strip adjacent said other fixed contact, the reset strip being spaced from the other strip while said contact end is hooked onto the breaker contact, and means actuated by the control shaft for bending the reset strip to force its free end toward the adjacent end of the conductor strip when the shaft is operated to open the switch, whereby if the conductor strip has become unhooked from the breaker contact the free end of the reset strip will push said contact end back into hooked-on engagement with the breaker contact.
11. An overload protected electric switch comprising a housing, a pair of fixed electric contacts inside the housing, one of said contacts being a circuit breaker contact, a thermally responsive bimetallic conductor strip secured at one end to the other contact, the strip having a laterally projecting contact end normally hooked onto said breaker contact, said strip being adapted to bend and spring away from the breaker contact when overheated by excessive electric current flowing therethrough, a movable contact in the housing, a control shaft for moving the movable contact into and out of engagement with one of the fixed contacts, a resilient reset strip extending lengthwise of the conductor strip along the side thereof remote from said circuit breaker contact, means in the housing anchoring one end of the reset strip adjacent said other fixed contact, the reset strip being spaced from the other strip while said contact end is hooked onto the breaker contact, and means mounted on the rear end of the control shaft and engageable with the central portion of the reset strip for bending the reset strip to force its free end toward the adjacent end of the conductor strip when the shaft is operated to open the switch, whereby if the conductor strip has become unhooked from the breaker contact the free end of the reset strip will push said contact end back into hooked-on engagement with the breaker contact.
12. An overload protected electric switch comprising a housing, a pair of fixed electric contacts inside the housing, one of said contacts being a circuit breaker contact, a thermally responsive bimetallic conductor strip secured at one end to the other contact, the strip having a laterally projecting contact end normally hooked onto said breaker contact, said strip being adapted to bend and spring away from the breaker contact when overheated by excessive electric current flowing therethrough, a movable contact in the housing, an axially movable control shaft for moving the movable contact into and out of engagement with one of the fixed contacts, a resilient reset strip extending lengthwise of the conductor strip along the side thereof remote from said circuit breaker contact, means in the housing anchoring one end of the reset strip adjacent said other fixed contact, the reset strip being spaced from the other strip while said contact end is hooked onto the breaker contact, said strips being disposed beside the shaft and extending across it, and means actuated by the control shaft for bending the reset strip to force its free end toward the adjacent end of the conductor strip when the shaft is operated to open the switch, whereby if the conductor strip has become unhooked from the breaker contact the free end of the reset strip will push said contact end back into hooked-on engagement with the breaker contact.
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