Patents Assigned to Strata Proximity Systems, LLC
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Patent number: 8847780Abstract: The invention relates to a proximity detection system. The invention provides a proximity detection system comprising a generator that generates a magnetic field that establishes a boundary, where the generator is capable of receiving radio frequency signals. Also provided is a radio frequency device that sends radio frequency signals, the radio frequency device being capable of sensing the magnetic field and generating a radio frequency response. In the proximity detection system, the generator generates the magnetic field for a first predefined time period, and thereafter senses for a radio frequency response signal from the radio frequency device within a second predefined time period. The invention also provides for shaping proximity detection zones by overlaying magnetic field boundaries to produce a different boundary. The invention also provides for varying the strength of magnetic fields by adjusting a width of a timed pulse.Type: GrantFiled: June 29, 2012Date of Patent: September 30, 2014Assignee: Strata Proximity Systems, LLCInventors: Larry D. Frederick, Paul L. Hammond
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Patent number: 8810390Abstract: Various proximity detection zones for work sites that require personnel to be in close proximity to various hazardous elements, such as machines, mobile equipment, remotely controlled machines, and operated vehicles can be shaped to fit specific equipment or work area configurations and may include one or more silent zones within the proximity warning zone in which an alarm is not sounded. The zones are determined by overlapping magnetic fields that expand and collapse at a selected operating frequency. Devices sense and measure the strength of the magnetic fields in which they are located and use the information to determine if they are in a silent or warning zone. Thus, it is possible to produce silent zones having desired shapes.Type: GrantFiled: May 20, 2013Date of Patent: August 19, 2014Assignee: Strata Proximity Systems, LLCInventor: Larry D. Frederick
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Publication number: 20140125488Abstract: Embodiments described herein relate to a methods and apparatus for optimizing and calibrating a magnetic field generator. In various embodiments, the magnetic field generator includes a signal generator for outputting a voltage and a magnetic field generating circuit including a shunt that may be used to change a value of inductance in the magnetic field generating circuit.Type: ApplicationFiled: September 20, 2013Publication date: May 8, 2014Applicants: STRATA PROXIMITY SYSTEMS, LLCInventors: Larry D. Frederick, Dwight Medley
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Patent number: 8710979Abstract: Embodiments described herein relate to an apparatus for attaching elements of a magnetic field safety system to headwear worn by a worker. In various embodiments, the headwear includes a combination of a sounder device, light assembly, personal alarm device and power source.Type: GrantFiled: June 25, 2009Date of Patent: April 29, 2014Assignee: Strata Proximity Systems, LLCInventor: Larry D. Frederick
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Publication number: 20140002271Abstract: Various proximity detection zones for work sites that require personnel to be in close proximity to various hazardous elements, such as machines, mobile equipment, remotely controlled machines, and operated vehicles can be shaped to fit specific equipment or work area configurations and may include one or more silent zones within the proximity warning zone in which an alarm is not sounded. The zones are determined by overlapping magnetic fields that expand and collapse at a selected operating frequency. Devices sense and measure the strength of the magnetic fields in which they are located and use the information to determine if they are in a silent or warning zone. Thus, it is possible to produce silent zones having desired shapes.Type: ApplicationFiled: May 20, 2013Publication date: January 2, 2014Applicant: STRATA PROXIMITY SYSTEMS, LLCInventor: Larry D. Frederick
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Patent number: 8552882Abstract: Embodiments described herein relate to proximity detection systems and a method for internal traffic control in a work zone. In various embodiments, magnetic field generators generate respective oscillating magnetic fields for detection by magnetic field detectors. The magnetic field detectors generate a signal for providing a visual and/or audible warning to operators in response to detecting the magnetic field.Type: GrantFiled: April 13, 2012Date of Patent: October 8, 2013Assignee: Strata Proximity Systems, LLCInventors: Larry D. Frederick, Dwight Medley
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Patent number: 8446277Abstract: Various proximity detection zones for work sites that require personnel to be in close proximity to various hazardous elements, such as machines, mobile equipment, remotely controlled machines, and operated vehicles can be shaped to fit specific equipment or work area configurations and may include one or more silent zones within the proximity warning zone in which an alarm is not sounded. The zones are determined by overlapping magnetic fields that expand and collapse at a selected operating frequency. Devices sense and measure the strength of the magnetic fields in which they are located and use the information to determine if they are in a silent or warning zone. Thus, it is possible to produce silent zones having desired shapes.Type: GrantFiled: April 29, 2010Date of Patent: May 21, 2013Assignee: Strata Proximity Systems, LLCInventor: Larry D. Frederick
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Patent number: 8232888Abstract: The invention relates to a proximity detection system. The invention provides a proximity detection system comprising a generator that generates a magnetic field that establishes a boundary, where the generator is capable of receiving radio frequency signals. Also provided is a radio frequency device that sends radio frequency signals, the radio frequency device being capable of sensing the magnetic field and generating a radio frequency response. In the proximity detection system, the generator generates the magnetic field for a first predefined time period, and thereafter senses for a radio frequency response signal from the radio frequency device within a second predefined time period. The invention also provides for shaping proximity detection zones by overlaying magnetic field boundaries to produce a different boundary. The invention also provides for varying the strength of magnetic fields by adjusting a width of a timed pulse.Type: GrantFiled: November 21, 2007Date of Patent: July 31, 2012Assignee: Strata Proximity Systems, LLCInventors: Larry D. Frederick, Paul L. Hammond
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Patent number: 8169335Abstract: Embodiments described herein relate to a methods and apparatus for optimizing and calibrating a magnetic field generator. In various embodiments, the magnetic field generator includes a signal generator for outputting a voltage and a magnetic field generating circuit including a shunt that may be used to change a value of inductance in the magnetic field generating circuit.Type: GrantFiled: March 24, 2009Date of Patent: May 1, 2012Assignee: Strata Proximity Systems, LLCInventors: Larry D. Frederick, Dwight Medley