Mary Tyler Moore, Morey Amsterdam, and Van Dyke himself kept viewers laughing in the writers’ room as well as in the suburbsMorey Amsterdam, Richard Deacon, Dick Van Dyke, Rose Marie, and Mary Tyler Moore on 'The Dick Van Dyke Show'Credit: Bettmann Archive/GettyIt’s been almost 60 years since The Dick Van Dyke Show's Rob Petrie first tripped over that ottoman in his New Rochelle, N.Y., living room, and people are still laughing.It isn’t just the…