TA 150 Counterweight System Return to Course Outline

		Head Block
		Loft Block
		Cable or Wire Wope
		Batten
		Arbor or Carriage
		Pig Irons or Counterweights
		Purchase Line or Operating Line
		Rope Lock. Locking Ring and Locking Rail
		Tension Block

Harold Burris-Meyer and Edward C. Cole, Scenery for the Theatre,
Little Brown & Company, Revised edition 1971, page 267.