Two kinds of worsted ring spinning frames were experimentally developed to decrease the number of yarn breakages during spinning. The first was characterized by extremely small spinning angles due to the replacement of snail wires by spinmasters. The distance between spinmaster and the nip point of front rollers is almost equal to the average fiber length. The second was also characterized by spinmaster, and the distance stated above is a little shorter than the longest fiber. The number of yarn breakages was found to decrease to 1/48-1/23 on the first frame, and to 1/12 on the second frame, comparing with that on existing frames.