IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0066963
(2002-02-04)
|
발명자
/ 주소 |
- Cline, David J.
- Otto, Cindy
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
48 인용 특허 :
58 |
초록
▼
A control system for a pool and spa. Main line voltage is provided through a single line voltage service and a single ground fault circuit interrupter circuit, facilitating a ground fault test and simplifying installation. The control system acts as a power distribution system for controlling the po
A control system for a pool and spa. Main line voltage is provided through a single line voltage service and a single ground fault circuit interrupter circuit, facilitating a ground fault test and simplifying installation. The control system acts as a power distribution system for controlling the pool and spa equipment, with a circuit board assembly including individual fuse protection devices and switching circuits. A test algorithm is included, wherein the control system is disabled from normal operation if the GFCI test fails. The pool operator manually enters a water fill command, and the controller system automatically opens the fill valve for a predetermined time interval, and then automatically closes the valve. An emergency disconnect switch is mounted near the bathing area, connected by low voltage wiring to the controller system cabinet. The controller system senses the emergency switch closure and disconnects line voltage to the line voltage loads. The emergency switch closure also remotely induces a ground fault, tripping the GFCI. A sensing circuit allows the controller system to sense the presence of the emergency switch system, and issues a warning and prevents normal operation of the pool and spa system if not connected. A gas pressure sensor monitors the natural gas line, and the heater is disabled and a warning given under low pressure conditions. Abnormal filter backpressure triggers a warning when the filter needs service. A temperature sensor has parallel sensing elements in a common housing to provide separate sensing circuits.
대표청구항
▼
A control system for a pool and spa. Main line voltage is provided through a single line voltage service and a single ground fault circuit interrupter circuit, facilitating a ground fault test and simplifying installation. The control system acts as a power distribution system for controlling the po
A control system for a pool and spa. Main line voltage is provided through a single line voltage service and a single ground fault circuit interrupter circuit, facilitating a ground fault test and simplifying installation. The control system acts as a power distribution system for controlling the pool and spa equipment, with a circuit board assembly including individual fuse protection devices and switching circuits. A test algorithm is included, wherein the control system is disabled from normal operation if the GFCI test fails. The pool operator manually enters a water fill command, and the controller system automatically opens the fill valve for a predetermined time interval, and then automatically closes the valve. An emergency disconnect switch is mounted near the bathing area, connected by low voltage wiring to the controller system cabinet. The controller system senses the emergency switch closure and disconnects line voltage to the line voltage loads. The emergency switch closure also remotely induces a ground fault, tripping the GFCI. A sensing circuit allows the controller system to sense the presence of the emergency switch system, and issues a warning and prevents normal operation of the pool and spa system if not connected. A gas pressure sensor monitors the natural gas line, and the heater is disabled and a warning given under low pressure conditions. Abnormal filter backpressure triggers a warning when the filter needs service. A temperature sensor has parallel sensing elements in a common housing to provide separate sensing circuits. gnetization direction of the free magnetic layer in a direction crossing the magnetization direction of the pinned magnetic layers; and electrode layers formed on the hard bias layers, where the electrode layers supply a sensing current to the lamination, where the electrode layers are formed to extend from both sides of the lamination to the central portion of a surface of the lamination. 2. A spin valve thin film element according to claim 1, wherein an extension length of one of the electrode layers on both sides of the lamination which extend to the central portion of the surface of the lamination is set in the range of about 0.1 μm through about 0.5 μm. 3. A thin film magnetic head comprising a spin valve thin film magnetic element according to claim 2. 4. A spin valve thin film element according to claim 1, wherein an extension length of one of the electrode layers on both sides of the lamination which extend to the central portion of the surface of the lamination is set in the range of about 0.03 μm through about 0.10 μm. 5. A thin film magnetic head comprising a spin valve thin film magnetic element according to claim 4. 6. A spin valve thin film element according to claim 1, where the lamination is formed by laminating in turn the antiferromagnetic layer, the first pinned magnetic layer, the nonmagnetic intermediate layer, the second pinned layer, the nonmagnetic conductive layer, the free magnetic layer, and the backed layer on the substrate. 7. A thin film magnetic head comprising a spin valve thin film magnetic element according to claim 6. 8. A spin valve thin film element according to claim 1, wherein the backed layer comprises a material selected from Au, Ag, and Cu. 9. A thin film magnetic head comprising a spin valve thin film magnetic element according to claim 8. 10. A spin valve thin film element according to claim 1, wherein a protecting layer made of Ta is formed on a surface of the backed layer. 11. A thin film magnetic head comprising a spin valve thin film magnetic element according to claim 10. 12. A spin valve thin film element according to claim 1, wherein an intermediate layer is provided between the backed layer and the hard bias layers, the intermediate layer comprising one of Ta and Cr. 13. A thin film magnetic head comprising a spin valve thin film magnetic element according to claim 12. 14. A spin valve thin film element according to claim 1, wherein an intermediate layer is provided between the backed layer and the electrode layers, the intermediate layer comprising one of Ta and Cr. 15. A thin film magnetic head comprising a spin valve thin film magnetic element according to claim 14. 16. A spin valve thin film element according to claim 1, wherein an intermediate layer is provided between the hard bias layers and the electrode layers, the intermediate layer comprising one of Ta and Cr. 17. A thin film magnetic head comprising a spin valve thin film magne element according to claim 16. 18. A spin valve thin film element according to claim 1, wherein each of the electrode layers comprises a film having at least one layer, wherein the film is made of at least one element selected from Cr, Au, Ta, and W. 19. A thin film magnetic head comprising a spin valve thin film magnetic element according to claim 18. 20. A spin valve thin film element according to claim 1, where each of the electrode layers comprises a multilayer film formed by alternately depositing Au and one of Ta and W. 21. A thin film magnetic head comprising a spin valve thin film magnetic element according to claim 20. 22. A spin valve thin film element according to claim 1, where the hard bias layers are arranged at the same layer position as the free magnetic layer on the substrate, and where upper surfaces of the hard bias layers are joined to the sides of the lamination at positions nearer the substrate than upper edges of the sides of the lamination. 23. A thin film magnetic head comprising a spin valve thin film magnet
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