Patents by Inventor Barry John Ensten

Barry John Ensten has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5861746
    Abstract: A method for detecting closure of a solenoid coil in a solenoid arrangement in a solenoid arrangement having first (4) and second (40) solenoid coils and a solenoid armature (5) that communicates between the coils (4, 40). A holding current signal (25) is provided (70) to the first solenoid coil (4) to maintain the solenoid armature (5) in an initial closed position with the first solenoid coil (4). A pulling current signal (27) is provided (50) to the second solenoid coil (40), the pulling current signal includes current peaks (19) with a measurable rise time (21). A value representative of the rise time for one of the current peaks is stored (58, 60), then the holding current signal is removed from the first solenoid coil (4). A rise time of each of the current peaks in the second solenoid coil (40) are sensed, and a determination when the rise time of a current peak changes from the stored rise time by a predetermined amount is made (90).
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: January 19, 1999
    Assignee: Motorola Inc.
    Inventor: Barry John Ensten