Edison format ruling
Machina Gearframe

Card text as printed in this era① When Normal Summoned: You can add 1 "Machina" monster from your Deck to your hand, except "Machina Gearframe".
② Once per turn, you can activate 1 of these effects;
● Target 1 Machine you control;
equip this monster to that target.
● Unequip and Special Summon this card.
③ If a monster equipped by this card's effect would be destroyed, destroy this card instead.
© A monster can never be equipped with more than 1 Union Monster.
Rulings
When equipping to a monster:
- If the target of is not a Machine, or is flipped face-down or leaves the field, this card is destroyed.
While equipped to a monster:
- If the equipped monster is flipped face-down or leaves the field, this card is destroyed at the exact same time (by game mechanics).
- This card is treated as an Equip Spell (and not a monster).
When Summoning this equipped card:
- If there is no empty Monster Zone when this effect resolves, this card is sent to the GY.
- If the equipped monster is flipped face-down or leaves the field, this card is destroyed at the exact same time (by game mechanics).
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.