Alarm clocks, when going off

Usage examples of wakers.

There was a little ritual grumbling when the wakers emerged to an unlit fire and this was followed by a vague presumption that he had probably gone to fetch water from a nearby stream.

Wal issued wakers to all when he himself dozed off just before a blink.

Gray-haired Admirals gulped wakers and pored over reports of the brief but tragic battle.