Keith A Walters, 547917 Telegraph Rd, Minneapolis, MN 55438

2007027, Nov 29, 2007

Feb 5, 2007

11/702445

Timothy Grupa - Golden Valley MN, US
Lane Woodland - Excelsior MN, US
Stephen Stocker - Andover MN, US
Martin Sukup - St. Paul MN, US
Bret Bartness - Plymouth MN, US
David Badzinski - Minneapolis MN, US
Jeffrey Shoemaker - Andover MN, US
Keith Walters - Minneapolis MN, US

G01R 15/20
H05K 7/20

32411700H, 361702000

A modular current sensing system for a servo control system that includes a magnetic core with an open center portion and a connection plate that includes at least three wire connectors, wherein the wire connectors are capable of connecting at least two wires electrically in series. The system also includes a plurality of wires, including a first wire with a first end and a second end, wherein the first end of the first wire is electrically connected to a first power source, and the second end of the first wire is connected to the connection plate at the first wire connector and wherein the first wire passes through the open portion defined by the magnetic core at least once. A first motor current flowing through the first wire induces a core current to flow in the magnetic core, causing the magnetic core to emit a magnetic field. A Hall effect sensor detects the magnetic field, produces an output current, and delivers the output current to a control device within a servo control system.

2007029, Dec 27, 2007

Feb 5, 2007

11/702419

Lane Woodland - Excelsior MN, US
Stephen Stocker - Andover MN, US
David Badzinski - Minneapolis MN, US
Jeffrey Shoemaker - Andover MN, US
Keith Walters - Minneapolis MN, US

G05B 11/36
G05B 1/06

318609000, 318661000

The present invention relates to an apparatus and method for generating digital electrical signals which are representative of the angular position and rotational velocity of a rotatable shaft or similar movable mechanical component in a servomechanism. In particular, the present invention utilizes oversampling techniques to create an accurate, flexible and responsive method for determining shaft position on a high speed motor. The present invention also includes methods for overcoming deadtime losses and velocity lag.

2020031, Oct 8, 2020

Apr 4, 2019

16/375577

- Agrate Brianza (MB), IT
- Coppell TX, US
Keith Walters - Bloomington MN, US

E05B 81/90
E05B 81/56
E05B 81/46
E05B 77/54
E05B 81/80

A method and device for unlatching a door from a frame, using a keyless door latch system, is provided. In one embodiment, a secondary unlocking component receives a signal and derives power from the signal to provide a power source for the keyless door latch system. A microcontroller generates a control signal and an actuator, in response to receiving the control signal, actuates the secondary unlocking component, which allows an energy source, from an exterior of the door, to be transferred to the keyless door latch system for the unlatching of the door.