Mechanism and Operation of CAS-TAD

抄録

CAS-TAD is built in two general types. Type A uses Auto-carrier motor-driven from one spinning frame to another. Type B is subdivided into two types. Type B₁ is man-driven. Type B₂ uses a man-driven carriage.
TAD, again, is divided into two types: the bobbin type which doffs bobbins; and the tube type which doffs paper tubes.
Any type of TAD, once installed on a spinning frame, automatically doffs the spinning frame and then returns to its original position. AD (auto-doffer) uses a 220-V alternate current. AC (auto-carrier) of TAD type A uses a 24-V direct current by battery or an alternate current. TAD travels and doffs intermittently, doffing 8 or 10 cops in one doffing cycle. The time required for TAD to do doffing on the right or left side of a spinning frame and return to its original place is 1/2 minutes for the bobbin type and 4 minutes for the tube type.
The rate of yarn breakage after a spinning frame has been doffed and when it is started is a maximum of 3%. The number of operatives needed to run a TAD is 1 for type A, 1 for type B₂ and 2 for type B₁. Tne number of spinning frames a TAD doffs is calculable by the following equation: A=t_s/t_d A: number of spinning frames t_s: time for making full bobbins of a spinning frame t_d: time for doffing a spinning frame TAD is equipped with many devices for safety to man and machine.