Patents by Inventor William F. Gallagher

William F. Gallagher 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: 6072383
    Abstract: An RFID tag circuit provides magnetic decoupling and amplitude modulation. The circuit is made up of a first inductor and a second inductor connected in series, a first capacitor, a second capacitor, and a switch. The circuit includes a first resonant circuit formed from a parallel connection of the series connected first and second inductors, and the first capacitor. The first resonant circuit has a primary resonant frequency. The circuit also includes a second circuit formed from a series connection of the second capacitor and the switch. The series connection of the second capacitor and the switch are connected in parallel to the second inductor. One end of the series connected second capacitor and switch is connected to the common connection between the series connected first and second inductors.
    Type: Grant
    Filed: November 4, 1998
    Date of Patent: June 6, 2000
    Assignee: Checkpoint Systems, Inc.
    Inventors: William F. Gallagher, III, Shinichiro Inui
  • Patent number: 5959531
    Abstract: Noise reduction schemes are provided in a radio frequency identification (RFID) system for use with RFID intelligent tags. Fiber optics are used to communicate analog tag response signals from the output of the receiver circuit to the input of a tag response signal analyzing module, which includes a digital signal processor (DSP). The fiber optics creates electrical isolation between these circuit elements breaking ground loops, stopping internal switching noise from the DSP from entering the receiver circuitry, and preventing common mode signals from interfering with the desired RFID tag signal.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: September 28, 1999
    Assignee: Checkpoint Systems, Inc.
    Inventors: William F. Gallagher, III, Russell E. Barber
  • Patent number: 5955950
    Abstract: Noise reduction schemes are provided in a radio frequency identification (RFID) system for use with RFID intelligent tags. Amplitude and phase noise is minimized by starting with a low noise crystal oscillator having an output frequency which is an integer multiple n of the desired RF field frequency, and then dividing this frequency by the integer multiple n. One or more cascaded flip-flops are used for the frequency dividing. Both outputs of the final stage flip-flop are used to drive the transmitter antenna to produce a continuous wave signal.
    Type: Grant
    Filed: July 24, 1998
    Date of Patent: September 21, 1999
    Assignee: Checkpoint Systems, Inc.
    Inventors: William F. Gallagher, III, Russell E. Barber, Eric Eckstein
  • Patent number: 5735018
    Abstract: An improved blower for moving debris on a surface is provided. The blower includes a frame mounted on wheels and a motor mounted to the frame. A blower housing with an inlet opening and a discharge chute is also mounted to the frame. A fan is located in the blower housing and is drivingly connected to the motor to generate an air flow having a predetermined volumetric flow. An adjustable height, pivotable deflector is mounted in the discharge chute to split the air flow into upper and lower portions. The deflector is pivotable from a first, downwardly inclined position, to concentrate the lower portion of the air flow along the surface to create a lifting force for lifting and moving the debris while the upper portion of the air flow moves the debris outwardly, to a second position, in which the pivotable deflector is upwardly inclined to create an expanded air flow profile. The deflector height is adjustable to adjust the volumetric flow of the upper and lower portions.
    Type: Grant
    Filed: October 2, 1996
    Date of Patent: April 7, 1998
    Assignee: Schiller-Pfeiffer, Incorporated
    Inventors: William F. Gallagher, Mark R. Pfeiffer