I posted my above comment late last night after a long trip... I neglected to include the patent URL. My apologies. https://patents.google.com/patent/US5345238

I posted my above comment late last night after a long trip... I neglected to include the patent URL. My apologies. https://patents.google.com/patent/US5345238A/en https://patents.google.com/patent/US5345238A/en