Optocoupler dimmer circuit for high intensity, gaseous discharge lamp
Patent 4197485 Issued on April 8, 1980. Estimated Expiration Date: 
July 24, 1998. 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.
July 24, 1998. 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 3459943 3466500 3816794 3845350 3894265 High pressure discharge lamp dimming circuit utilizing variable duty-cycle photocoupler Patent #: 4016451 InventorAssigneeApplicationNo. 05/927555 filed on 07/24/1978US Classes:315/291, CURRENT AND/OR VOLTAGE REGULATION250/551, Signal isolator315/158, Radiant energy controlled regulation of the current supply for the load device315/284, Variable inductance315/311Variable impedance-type regulatorExaminersPrimary: LaRoche, Eugene R.Attorney, Agent or FirmInternational ClassesH05B 41/392 (20060101)H05B 41/39 (20060101) AbstractA dimmer circuit for a high intensity, gaseous discharge lamp having a ballast with a reactive portion, the current bypass or partial bypass of which determines the brightness of the lamp, the bypass being controlled by gated bypass means, preferably in the form of a triac, driven by the photodrive element of an optocoupler, the light emitting diode element of the optocoupler receiving pulses and actuating the photodrive element for passing a gate trigger signal to the gated bypass means.Field of SearchRadiant energy control of an electric discharge device in the supply circuit of the load deviceRadiant energy controlled regulation of the current supply for the load device Electric switch controlled by the radiant energy responsive device REGULATION OF THE CONTROL CURRENT AND/OR POTENTIAL APPLIED TO DISCHARGE CONTROL DISCHARGE DEVICE LOADS BY PHASE SHIFTING MEANS Variable inductance CURRENT AND/OR VOLTAGE REGULATION Automatic regulation Variable impedance-type regulator | |
