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Patent

Apparatus and method for restricting the discharge of fasteners from a tool

TLDR
In this paper, a method for discharging fastening elements and a method of preventing a device from discharging a fastening device into human flesh was described. But the method was not discussed.
Abstract
A device for discharging fastening elements, and a method of preventing a device from discharging fastening devices into human flesh, are disclosed. The device includes a coil proximate a location of discharge, a capacitive element coupled in parallel with the conductive coil to form a resonant tank circuit, an oscillator that drives the tank circuit, a frequency detector, an amplitude control circuit and a processor. The detector detects a frequency of oscillation of the tank circuit as affected by a material proximate the coil. In response to an electrical signal from the oscillator, the control circuit generates a control signal that is provided back to the oscillator. Based upon the frequency and an additional signal functionally related to the control signal, the processor provides an output signal that prevents the device from discharging when the material proximate the coil is human flesh.

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Patent

Motion detecting system for use in a safety system for power equipment

TL;DR: In this paper, a woodworking machine including a detection system adapted to detect a dangerous condition between a person and a working portion of the machine is disclosed, and the machine includes a reaction system associated with the detection system to cause a predetermined action to take place relative to the working portion upon detection of the dangerous condition.
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TL;DR: In this paper, the authors have disclosed that woodworking machines have cutting tools adapted to cut workpieces and a brake mechanism having one or more braking components adapted to engage and stop the cutting tool in response to the detection of a dangerous condition.
References
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Patent

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Paul W. Mayer
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