Patent GB-191030109-A (GB)
Title: Improvements in and relating to Doffing Mechanism for Cap-spinning Twisting, Doubling and analogous Machines.
Inventor: SMITH PRINCE
IPC: D01H9/04
Filed: 1910-12-28
Granted: 1911-12-21
Abstract: 30,109. Smith, Sir P., Smith, P., and Shackleton, S. Dec. 28. Doffing-arrangements for cop spinning, twisting, doubling &c. frames. The cops and the full and empty bobbins are supported on and carried by single members of a series of devices which are traversed horizontally by rack slides 56, and the devices for positioning, securing and severing the threads are carried by vertical rack slides 24, and serve to ensure the driving-engagement of the empty bobbin and wharl when re-starting by restraining the movement of the bobbins until the holes therein are overtaken by the pegs of the wharl. When the machine is stopped for doffing, the rack slide 24 is raised and a rod 43 mounted thereon is moved angularly towards the spindles, and a rock-shaft 46, mounted on arms 47 fast on the rod 43 and carrying thread-conveyers 63, is moved until the hooked extremities of such conveyers are between the thread boards and the tops of the cops. The shaft 46 is moved longitudinally for the conveyers to engage the threads and the parts returned to the position shown in Fig. 4. The lifter plates are lowered to move the bobbins clear of the cops, which are supported by the limbs 54 of the carriers mounted on the rack slides 56, the tin rollers being " backed " slightly to avoid tension in the thread. The conveyers are released from the threads, by moving their supporting-shaft horizontally, and raised above the thread boards. The carriers are advanced to locate the cops at the back of clips 51, shown in detail in Fig. 11, and are retracted after the spindles are lowered, so that the full bobbins are adjacent thereto when the lifter-rail is raised. The carriers are again advanced to support the bobbins by the front parts of the clips 51 and the limbs 54, and the spindles and lifter plate lowered clear thereof, so that the carriers transfer the bobbins over pegs 37, which are raised and the carriers retracted to deposit the full bobbins thereon. The rack 23 is further raised to locate the empty bobbins carried thereon in front of the carriers, which are advanced to support the empty bobbins on the limbs 54 and are retracted, when the pegs are lowered, until the bobbins are above the spindles, when the spindle rail is raised to receive the bobbins on the tubes. The spindles are lowered and then raised to receive the cops which are meanwhile advanced to a position above the spindles, and while they are so advanced the lifter rail is raised to pass the bobbins through the aperture in the rear of the limbs 54, which are then retracted to support the bobbins on the forward parts. The thread - conveyer mechanism is lowered, and bifurcated plates 75 thereon place the threads into the path of the conveyers 63 which are operated to lay the threads across the driving- pegs on the tubes. The conveyers are then operated to rest on the lower flange of the bobbins so as to restrain their movement until the pegs on the tubes register with the corresponding holes in the bobbins, owing to the rotation imparted by the tin roller, when the bobbins drop on to the pegs and grip the thread. The threads are broken, when the machine is restarted, by means of pegs on a rod 77, which is elevated so as to cause the pegs to protrude through the rail 35 and to engage the holes in the full bobbins and suddenly arrest their rotation, or by gripping the threads in the apices of the bifurcations in the bar 75 so as to break them close to the wharls.