1985 - Volume #9, Issue #2, Page #7
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Trip-O-Matic Gate Opens Automatically
"It's the first automatic self-opening farm gate that doesn't require an outside power source," say developers of the "Trip-O-Matic" farm gate that uses mechanical linkages to open and shut farm gates.
The gate opener uses two 6-in. high triggers installed in the drive path ahead of and behind the gate. Two aircr..........


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1985 - Volume #9, Issue #2