Frank J Haas

US Patent:

7064509, Jun 20, 2006

Filed:

Mar 14, 2005

Appl. No.:

11/079644

Inventors:

Zhenxing Fu - Ann Arbor MI, US
Karienne A. Yockey - Ypsilanti MI, US
Frank J. Aiello - Canton MI, US
James R. Winkelman - Bloomfield MI, US
Frank J. Haas - Northville MI, US

Assignee:

Visteon Global Technologies, Inc. - Van Buren Township MI

International Classification:

H01R 39/46

US Classification:

318439, 318138, 318254, 318244, 318246, 318253, 318293

Abstract:

An apparatus for determining angular positions of DC motor includes a capacitor connected in parallel with the DC motor. The current flowing through the capacitor, at any given time, is an AC ripple current responsive to a commutation event of the DC motor. The capacitor partially sources the motor current ripples during commutation and recharges itself during the off-commutation period. Since the number of commutation events per mechanical revolution is pre-determined once the DC motor is designed, the frequency of the AC ripple currents through the capacitor corresponds to the frequency of commutation, and thus a motor position of the DC motor.

US Patent:

7190129, Mar 13, 2007

Filed:

Dec 14, 2005

Appl. No.:

11/300127

Inventors:

Frank J. Haas - Northville MI, US

Assignee:

Visteon Global Technologies, Inc. - Van Buren Township MI

International Classification:

H02K 27/20

US Classification:

318245, 388828, 388904

Abstract:

A system of detecting position drift in the motor due to lost pulses. Due to imperfections in the motor, the timing of the commutation pulses is not uniform but forms a unique repeatable signature. The system identifies lost pulses by using a pattern recognition technique on the signature of the motor commutation pulse rate. By detecting when a pulse is lost, the system can apply a correction to the pulse count. Accordingly, the real time correction of the pulse count allows for the system to operate with significantly reduced mispositioning errors. In addition, the system requires far fewer calibrations.

US Patent:

20080290828, Nov 27, 2008

Filed:

May 24, 2007

Appl. No.:

11/753185

Inventors:

Frank Joseph Haas - Northville MI, US
Stephen Andrew Sageman - Canton MI, US

International Classification:

H02P 7/18
H02P 3/00

US Classification:

318434

Abstract:

A system for detecting when a motor is stalled. The system including a voltage driving circuit and a voltage sensing circuit. The voltage driving circuit providing a driving signal to the motor through a connection node. The voltage driver circuit being configured to disconnect from the connection node while the voltage sensing circuit determines if the motor is stalled. A voltage sensing circuit determines if the motor is stalled based on a generated voltage that occurs if the motor is not obstructed and continues to spin when the voltage driver circuit is disconnected.

US Patent:

42740797, Jun 16, 1981

Filed:

Jul 12, 1979

Appl. No.:

6/057070

Inventors:

Robert Todd - Farmington Hills MI
Frank J. Haas - Livonia MI

Assignee:

Burroughs Corporation - Detroit MI

International Classification:

G06K 970

US Classification:

3401463FT

Abstract:

A method and apparatus are provided for dynamically switching between fonts or groups of fonts in an automatic optical character reader. A switch character which is included between a first and second group of characters triggers the selection of the appropriate memory for the succeeding font.

US Patent:

42186471, Aug 19, 1980

Filed:

Oct 27, 1978

Appl. No.:

5/955241

Inventors:

Frank J. Haas - Harper Woods MI

Assignee:

Burroughs Corporation - Detroit MI

International Classification:

G05F 158

US Classification:

323 9

Abstract:

Voltage regulator having current limiting circuitry. The voltage regulator includes an operational amplifier which has a substantially high output impedance and is disposed in a negative feedback configuration to provide an output signal which is the difference between a reference voltage input and the magnitude of the output voltage of the voltage regulator. Overcurrent detection circuitry is connected to the output of the operational amplifier and provides an on or off signal whenever the magnitude of the current drawn by a load exceeds a predetermined magnitude. When the magnitude of the load current exceeds a predetermined magnitude, the output of the overcurrent detection circuitry will be a low level signal which clamps or draws down the magnitude of the output voltage of the operational amplifier towards ground potential. A resistor-capacitor series circuit connected between ground and the output of the operational amplifier integrates the digital signal and provides an analog signal proportional to the average magnitude of the output voltage of the operational amplifier. A portion of the magnitude of the analog signal is fed back through a resistor to the gain of the operational amplifier and cause the output voltage of the operational amplifier to be linearly reduced which, in turn, through the power amplification controlling circuitry of the voltage regulator linearly reduces the output current of the voltage regulator until the overcurrent condition is eliminated.

US Patent:

40889823, May 9, 1978

Filed:

Feb 28, 1977

Appl. No.:

5/773007

Inventors:

Frank J. Haas - Harper Woods MI

Assignee:

Burroughs Corporation - Detroit MI

International Classification:

G06K 900

US Classification:

3401463ED

Abstract:

A high-speed apparatus that processes a stack of documents such as bank checks. The apparatus includes a feeder for serially feeding the documents, an error-indicating character reader for reading characters on the documents, an operator's console for manually inputting characters rejected by the character reader, and a sorter for sorting the documents into groups. The error-indicating character reader includes a character reader, a printer located a fixed distance from the character reader and an AC synchronous motor that drives each document serially past the reader and printer in a continuous motion. The character reader provides a first electrical signal when it cannot read a character. A motor velocity detecting means provides a second electrical signal representative of the motor velocity. A variable delay means that includes a phase locked loop and shift register circuitry delays the first electrical signal (can't read from the character reader) a variable time which time depends upon the second electrical signal (motor velocity).