Rich,

I tried to List such a device with UL some time ago and they told me that
they could not List because it is inherently unsafe! However, I succeeded
in getting TUV GS for the system.




At 13:43 26/07/2000 -0700, Rich Nute wrote:
>
>
>
>
>Hi Phil:
>
>
>>   Does anyone have the least inkling of any safety requirements specific
to a
>>   firearm with an electronic trigger. I am not particularly interested in
>>   firearms laws/regulations etc but any requirements that the
electronics may
>>   fall under. This device will be powered by a 9-volt battery.
>
>It seems to me that the worst-case situation
>is that of triggering at some time other than
>the commanded time.
>
>The electronic trigger better be "fail-safe."
>
>That is, the design should accomodate any component
>failure -- open, short, wrong value -- without 
>triggering.
>
>This is not as difficult as it sounds.  I have 
>contributed to such a design which resulted in a
>patent.
>
>In addition, it probably should be designed such
>that trigger actuation requires two, independent
>(simultaneous or sequential) acts on the part of 
>the operator, e.g., "ready," and "fire."  
>
>I would tend to apply safety "interlock" concepts.  
>The trigger has two modes, "safe" and "operate."  
>The "safe" mode should be protected as would an
>interlock circuit.
>
>
>Regards,
>Rich
>
>
>
>
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Peter Merguerian
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