Full scale AC or DC power attenuator
Patent 5045774 Issued on September 3, 1991. Estimated Expiration Date: 
December 28, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 28, 2009. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3564394 3622849 3879652 Solid state power control apparatus Electric regulators Dimmer control system Power regulating apparatus including load current sensor means Thyristor driver controller for reactive loads and method of operation thereof DC Light dimmer control system Three terminal bidirectional source to source FET circuit InventorAssigneeApplicationNo. 458172 filed on 12/28/1989US Classes:323/322, With digital control323/224, With additional series regulator323/241, With digital control323/246With plural condition sensingExaminersPrimary: Skudy, R.Assistant: Sterrett, Jeffrey Attorney, Agent or FirmInternational ClassG05B 024/02AbstractA remotely controllable, full scale, AC or DC power attenuator, for attenuating power to a load as a function of an input control signal which represents a selected percentage of power to be applied to the load. Bidirectional series switch means are responsive to the input control signal for connecting and disconnecting power to the load.Other References
Field of SearchWith additional series regulatorIncluding single unidirectional element with bidirectional pass With digital control With plural condition sensing With digital control Using single unidirectional element with bidirectional pass Using a three or more terminal semiconductive device as the final control device Including plural final control devices | |
