Constant amplitude controller and method
Patent 4300083 Issued on November 10, 1981. Estimated Expiration Date: 
March 19, 1999. 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.
March 19, 1999. 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 3331239 3379972 3626267 3905188 InventorAssigneeApplicationNo. 06/021503 filed on 03/19/1979US Classes:318/686, Reciprocating or oscillating motors318/128Noise, sound, vibration, movement or position of motorExaminersPrimary: Dobeck, B.Attorney, Agent or FirmInternational ClassesH02K 33/00 (20060101)B06B 1/02 (20060101) AbstractThere is disclosed a constant amplitude controller with feedback control for a vibratory feeder apparatus wherein a controlled rectifier is used to rectify the A.C. line voltage applied to the feeder solenoid and to control the voltage to the feeder solenoid. Triggering of the controlled rectifier is accomplished by a bias control signal which is composed of an A.C. phase shift voltage superpositioned by a variable D.C. bias voltage. Mechanical coupling is provided between the solenoid and a transducer which provides feedback to control logic circuitry. In the control logic circuitry, the signal received from the transducer is compared with a signal received from an operator adjusted potentiometer. In this manner, the desired amplitude of the vibrator apparatus is compared with the actual amplitude of the vibrator apparatus and, if there is a discrepancy, the control logic circuitry modifies the amount of control voltage being transferred by the controlled rectifier. | |
