US Government As Represented by the Secretary of the Army

Other

Daniel Charles Heinz

Michael Leonard Brennan

Adam Melber

Michael Steer

Thomas Albert Burst

Bing Mak

Daniel John Heinz

Various embodiments that pertain to a loop antenna are described. The loop antenna can be a single loop antenna that switches between a first phase and a second phase. While operating at different phases, the loop antenna can function at the same frequency. The loop antenna can observe a response to the frequency at the first phase and the frequency at the second phase. This can provide a wider range of information over operation in a single phase.

Wire identification sensor

Various embodiments are described that relate to a detector. The detector can include a loop functioning at a high frequency that emits a magnetic field. The magnetic field can be retrieved and a comparison can be made between the emitted magnetic field and the retrieved magnetic field. If there is substantially little difference between the emitted and retrieved field, then a determination can be that no object is present. Conversely, if there is a substantial difference between the emitted and retrieved field, then the determination can be that an object is present and thus the object is detected. If the object is present, the returned magnetic field can be further analyzed to determine the type of object that is detected.

Detector

Various embodiments are described that relate to a loop with a constant phase. The loop can function as an antenna and be used in object detection. A current source can be used to power the loop such that the loop produces a magnetic field and electric field. The magnetic field can be powerful enough to detect a dielectric while the electric field is so small that it does not interfere with nearby communication equipment. Thus, detection can occur without disruption of other important devices.

Constant phase

Various embodiments are described that relate to a loop with a constant phase. The loop can function as an antenna and be used in object detection. A current source can be used to power the loop such that the loop produces a magnetic field and an electric field. The magnetic field can be powerful enough to detect a dielectric while the electric field is so small that it does not interfere with nearby communication equipment. Thus, detection can occur without disruption of other important devices.

A lawnmower consisting essentially of a rotary cutting apparatus comprising a plurality of small blades and a grass guide for bending and constraining the grass for ease of cutting. The grass guide is mounted substantially parallel to the drive shafts which extend beyond the rear-most end of the grass guide and to which cutting blades are affixed. As the mower is propelled forward, the grass guide bends the grass forward and constrains movement of the grass such that only a section of the outer radii of the blades contact the grass, optimizing cutting efficiency. The blades may be individually driven by one or more small electric motors powered by a rechargeable battery or batteries or other sources. The grass guide is situated at an angle adjustably tilted between 1 and 90 degrees in the longitudinal direction from vertical in order to limit the cutting area of the blades and power requirements.

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Perry Hall, MD, United States of America

Daniel Charles Heinz