IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0768464
(2013-02-15)
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등록번호 |
US-8830018
(2014-09-09)
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발명자
/ 주소 |
- Plude, Jr., Howard H.
- Moroz, Myron
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출원인 / 주소 |
- Ward Leonard Investment Holdings, LLC
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대리인 / 주소 |
McCormick, Paulding & Huber LLP
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인용정보 |
피인용 횟수 :
0 인용 특허 :
15 |
초록
▼
A solenoid-driven automatic bus transfer switch may automatically transfer one or more electrical loads from a first power source to a second power source, or vice versa, in the event of a power failure or other casualty that affects either power source. The transfer switch may be operated in respon
A solenoid-driven automatic bus transfer switch may automatically transfer one or more electrical loads from a first power source to a second power source, or vice versa, in the event of a power failure or other casualty that affects either power source. The transfer switch may be operated in response to the energization of a solenoid coil, which causes a main shaft having a transfer element to rotate from being in contact with the first power source to being in contact with the second power source. The transfer element may be spring-mounted to the shaft, which ensures that a sufficient electrical contact exists between the surfaces of the transfer element and the respective leads of the first and second power sources, regardless of any wear or degradation that may be experienced at any of the surfaces.
대표청구항
▼
1. A transfer switch for transferring a load from a normal power source to an alternate power source comprising: a source platform;a load platform supported by a frame mounted to a top face of the source platform;a transfer element mounted to a rotatable shaft that defines an axis, wherein the rotat
1. A transfer switch for transferring a load from a normal power source to an alternate power source comprising: a source platform;a load platform supported by a frame mounted to a top face of the source platform;a transfer element mounted to a rotatable shaft that defines an axis, wherein the rotatable shaft is supported by the frame;a normal source contact mounted to the top face of the source platform on a normal side of the axis;an alternate source contact mounted to the top face of the source platform on an alternate side of the axis;a load contact supported by the load platform; anda flexible conductor formed in a continuous loop, wherein the flexible conductor provides at least one conductive path between the transfer element and the load contact,wherein the rotatable shaft is adapted to place the transfer element in electrical contact with the normal source contact when the rotatable shaft is in a normal position,wherein the rotatable shaft is adapted to place the transfer element in electrical contact with the alternate source contact when the rotatable shaft is in an alternate position, andwherein the automatic transfer switch is mass-centered about the axis. 2. The transfer switch of claim 1, further comprising: an automatic operator comprising a solenoid; anda transfer operator assembly that is mechanically coupled to the rotatable shaft;wherein the automatic operator is adapted to cause a rotation of the rotatable shaft from the normal position to the alternate position or from the alternate position to the normal position in response to an energization of a coil of the solenoid. 3. The transfer switch of claim 2, wherein the automatic operator further comprises a solenoid plunger and an adjustable spring for providing tension to the solenoid plunger, wherein the energization of the coil of the solenoid causes a withdrawal of the solenoid plunger in opposition to the adjustable spring. 4. The transfer switch of claim 1, further comprising: a base platform mounted to a bottom face of the source platform; anda source connector electrically connected to one of the normal source contact and the alternate source contact, wherein the source connector extends from the normal source contact to the alternate side or from the alternate source contact to the normal side. 5. The transfer switch of claim 1, wherein the transfer element comprises a first spring-bound connection to the rotatable shaft and a second spring-bound connection to the rotatable shaft, wherein the first spring-bound connection is configured to bias the transfer element into contact with the normal source contact when the rotatable shaft is in the normal position, andwherein the second spring-bound connection is configured to bias the transfer element into contact with the alternate source contact when the rotatable shaft is in the alternate position. 6. The transfer switch of claim 1, wherein the transfer element comprises a trench having a base, a normal end and an alternate end, wherein the normal end comprises a normal transfer contact for contacting the normal source contact when the rotatable shaft is in the normal position, andwherein the alternate end comprises an alternate transfer contact for contacting the alternate source contact when the rotatable shaft is in the alternate position. 7. The transfer switch of claim 6, wherein the base is spring-mounted to the rotatable shaft. 8. The transfer switch of claim 7, wherein the transfer element is formed of a brass alloy. 9. The transfer switch of claim 1, further comprising a contact hood mounted to the source platform, wherein the contact hood comprises a chamber for accommodating the transfer element and an opening for accommodating the rotatable shaft, andwherein the chamber is formed from at least one barrier within an interior of the contact hood. 10. An automatic transfer switch for transferring an electrical load from a normal power source to an alternate power source, comprising: a rotatable means for aligning the electrical load with one of the normal power source and the alternate power source, wherein at least one transfer element is spring-mounted to the rotatable means;a solenoid operator mechanically connected to the rotatable means; andat least one conductive loop extending between the at least one transfer element and a load contact,wherein the rotatable means is mass-centered about an axis. 11. The automatic transfer switch of claim 10, wherein the solenoid operator comprises a solenoid coil, a solenoid plunger mechanically connected to the rotatable means and a solenoid spring providing tension to the solenoid plunger, wherein the solenoid causes a withdrawal of the solenoid plunger in response to an energization of the solenoid coil, andwherein the withdrawal of the solenoid means causes a rotation of the rotatable means from a first position to a second position in a predetermined period of time. 12. The automatic transfer switch of claim 11, wherein the solenoid operator further comprises an adjuster for adjusting the tension of the solenoid spring, and wherein the predetermined time is defined by the tension of the solenoid spring. 13. The automatic transfer switch of claim 11, wherein the rotatable means comprises a shaft, and wherein the at least one transfer element is spring-mounted to the shaft by at least one spring-bound connector,wherein the at least one spring-bound connector biases the at least one transfer element into a normal source contact when the rotatable shaft is in the first position, andwherein the at least one spring-bound connector biases the at least one transfer element into an alternate source contact when the rotatable shaft is in the second position. 14. The automatic transfer switch of claim 10, further comprising a contact hood assembly, wherein the contact hood assembly defines at least one opening for accommodating the rotatable means, andwherein the contact hood assembly comprises at least one chamber for accommodating the at least one transfer element during the rotation.
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