Speaking of terminology, never heard of "gravity clamp." Do you mean trigger clamp?
I think so. I first called them trigger clamps before anyone said to me "that's a gravity clamp." Global Truss Trigger Clamp TRIGGER CLAMP B&H Photo Video But most people call them "gravity clamps" even though most mfg. call them trigger clamps. Just like people call 3 pin xlr cables "dmx cables." Differences in terminology will always be present in this industry. And I'm sure that the same issue occurs in most others. When I worked in restaurants we had "china caps" "chinoise" and "cone strainers" which are all exactly the same thing.