Patents by Inventor Clifford W. Erickson

Clifford W. Erickson 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).

  • Proximity sensor
    Patent number: 4120389
    Abstract: An energy curtain is formed by exciting high order beam modes in an open resonant cavity. Depending on mode number, the energy resonates in a mathematically determined pattern. A detector senses changes in the resonant condition caused by the presence of an object in the pattern. The apparatus may be used in a variety of applications, including the protection of a machine operator from a hazardous area of a machine, parts counting, and intrusion detection.
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: October 17, 1978
    Assignee: Honeywell Inc.
    Inventor: Clifford W. Erickson
  • Proximity sensor
    Patent number: 4109233
    Abstract: An energy curtain is formed by exciting high order beam modes in an open resonant cavity. Depending on mode number, the energy resonates in a mathematically determined pattern. A detector senses changes in the resonant condition caused by the presence of an object in the pattern. The apparatus may be used in a variety of applications, including the protection of a machine operator from a hazardous area of a machine, parts counting, and intrusion detection.
    Type: Grant
    Filed: February 7, 1977
    Date of Patent: August 22, 1978
    Assignee: Honeywell Inc.
    Inventor: Clifford W. Erickson
  • High order beam mode resonator
    Patent number: 3979695
    Abstract: High order resonant beam modes are generated in an open resonant cavity. The cavity is formed by reflectors which are separated from one another along an axis. Wave energy is introduced into the resonant cavity at a position which is not on the axis.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: September 7, 1976
    Assignee: Honeywell Inc.
    Inventor: Clifford W. Erickson
  • Acoustic resonant cavity
    Patent number: 3948350
    Abstract: Resonant acoustic beams modes are generated by an acoustic energy source and a plurality of reflectors disposed along a path.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: April 6, 1976
    Assignee: Honeywell Inc.
    Inventor: Clifford W. Erickson