Abstract: The impulse variable speed device comprises an input shaft (2) and output shaft (2) both axially aligned. The input shaft is kinematically connected to a mechanism for converting rotary motion of the input shaft into an oscillating motion of an intermediate link. The output shaft is connected to a mechanism for converting the oscillating motion of the intermediate link into rotary motion of the output shaft, the mechanism comprising free-wheeling clutches and of heterodirectional action kinematically connected with the intermediate link. The mechanism for converting rotary motion into an oscillating motion comprises a bow-shaped guide rod fixed on the input shaft and having the center of curvature thereof on the axis of the input and output shafts and, which center is a single center of the variable speed device. A slider is put on said guide rod for displacement along the guide rod. The slider is pivoted to one end of a lever whose axis crosses the single center of the variable speed device.

Abstract: An electric motor comprises a stator provided with a helical magnetic core within whose grooves is laid an armature winding, and a rotor disposed within a stator boring. The rotor is provided with salients for forming a main magnetic field, disposed therearound along a helical line, the length of the salients being equal to .alpha..delta..tau., and the distance therebetween being (2-.alpha..delta.).tau., where .alpha..delta. is a coefficient of a rated pole arc, and .tau. is a pole pitch of the motor. According to the invention, in the magnetic core is provided an additional groove wherein is laid an excitation winding, the portions of each turn of the magnetic core whereon the armature winding and the excitation winding are disposed have such a length which ensures axial alignment of the grooves for placing the armature winding within all the turns of the magnetic core.

Abstract: A linear electric motor comprises a stator constructed in the form of two equidistant ferromagnetic strips 1 and 2 provided with alternating projections 3 and recesses 4 having a length equal to the pole pitch .tau. of the motor. A movable core 5 is disposed between the poles 1 and 2. The projections of the strip 1 are shifted relative to the projections on the strip 2 by a distance .tau.. An excitation winding 3 is laid in the middle portion of the core 5, characterized by a low magnetic permeability. An armature winding 9 is laid in the extreme portions of the core 5, having a high magnetic permeability, in symmetrical relationship with respect to a winding 8. Two coil groups of the winding 9 have equal number of sections and are electrically connected in a commutation device 10.