[snowwrestler]

I sometimes see swings in votes on my comments, although not such a fixed one-hour schedule.

(And I'd challenge your perception of that schedule, unless you're carefully timing every post. Confirmation bias can be strong--once you have the idea that it's an hour, you will tend to remember the times that were close to an hour, and forget the ones that weren't.)

The downvote/upvote patterns I've seen seem to be more related to the time of day. Comments get voted down during the workday by people who are on HN during the workday; but sometimes they'll get voted up in the evening, presumably by people who only check into HN after work.

I see a similar pattern on the weekend--vote trends on Saturday afternoon will sometimes reverse on Sunday night, again I assume because folks too busy to post during the weekend are checking out HN before bed. In general, I find the quality of moderation on HN to be worse on the weekend.

There also seems to be a "heat of the moment" effect, where posts that go against the prevailing wisdom get downvoted right away, but then voted back up hours later. I assume that is because people who read the discussion hours later can take a more measured view of the whole discussion.