755,395. Sewing-machines. SINGER MANUFACTURING CO. Oct. 21, 1954 [Nov. 13, 1953], No. 30321/54. Class 112. Rotary take - ups.-Thread take - up means comprises a rotary take-up member which is provided with a thread - engaging finger and is drivingly connected with a crank member carried by a driving shaft, a control member which is pivoted to the machine frame within the path of the crank member and is operatively connected to the take-up member, and a pair of thread-guiding members which define a slot adapted to position a loop of thread within the path of the thread-engaging finger. A take-up member 52, Fig. 6, carries a thread-engaging finger 55 and is pivoted on a crank-pin 39 carried by a driving shaft 24, the control member 53 being slidably mounted on the take-up member and being pivoted at 54 to a fixed disc 50, Figs. 2 and 3, the latter, constituting one thread-guiding member, being separated by the thread-receiving slot 62 from the second threadguiding member 59. The arrangement is such that finger 55 moves in an oval path at a non- uniform speed, its instantaneous speed being represented by the tangential vectors shown at the points A to E corresponding to the positions a to e of the crank-pin 39. Stitch setting occurs during the movement of finger 55 from E to B through approximately 180 degrees, corresponding to the movement of crank-pin 39 from e to b through approximately 90 degrees, the needle penetrates the work at point C, and the looptaker seizes the needle loop at the point D. The edges of disc 50 and the member 59, the latter constituting a guard-plate, conform to the path of finger 55, the latter passing around the edge of disc 50 and entering a peripheral groove 61 provided on plate 59. Disc 50 is disposed in an oval recess 44 provided in a plate 43 secured to the head 23 of the machine, and is mounted on a fixed bracket 48, the latter being provided with a slot 49 through which finger 55 passes. Plate 59 is pivoted at 56 to bracket 48 and is held in operative position by a spring-biased plunger 60. Thread is led from a tensioning device 64 and check spring 65 through the slot 62, and from thence through a fixed guide 66 and a guide 67 mounted on the needle bar 35, to the eye of the needle 36. In a modification, the control member does not have a sliding connection with the take up member, but is pivoted to the latter. Needle driving.-The needle bar 35 is pivoted at 34 to one end of a connecting rod 33, the other end of which is journalled on a crank-pin 31 carried by a counterbalance member 29 secured to the end of the driving shaft 24. Pin 31 is provided with a head 32, to which is secured by screws 37 one end of an arm 38, the other end of which carries the take-up actuating crank-pin 39. Connecting upper and lower shafts.-The driving shaft 24, located in the upper arm 22, Fig. 1, of the machine, is connected by bevel gears and a vertical shaft 26 to the loop-taker driving shaft 27 in the base 20 of the machine.