Abstract: A linear actuator having an output shaft having a pair of driven wheels mounted thereon. One of the driven wheels is rotatably mounted in a fixed plane and has a drive nut for an associated thread on the output shaft. The other drive wheel is rotatably fixed to the output shaft. An input shaft is in side-by-side relationship with the output shaft and adapted to be rotated by a suitable power source. The input shaft provides a drive wheel for each of the driven wheels, with the ratio between each drive and driven wheel set being chosen to rotate the driven wheels at different speeds in the same rotational direction and thereby produce a controlled axial movement of the output shaft in a direction depending upon the relative rotation of the driven wheels. The other driven wheel and the drive wheel of its set are in the form of meshing helical gear wheels.

Abstract: A progressive clutch includes a centrifugal clutch 10 attached to a drive shaft and inserted into a clutch housing assembly 16 to engage with clutch material 28 during low rpm operation. As the rpm of the input drive shaft 2 increases, the centrifugal force on pellets 32 overcomes the force of compression springs 34, and extension springs 40 pull a pin engagement assembly 30 towards the clutch housing assembly 16 thus engaging pins 38 into elongated holes 42 to provide positive drive from the drive shaft 2 to the driven shaft 21.

Abstract: An actuating mechanism for example for an electric switch comprises a driving member, a driven shaft and a transmission gearing through which the driven shaft is driven by the driving member through a certain angle of rotation after a predetermined number of revolutions of the driving member. An actuator carried by the driven shaft is operative at a predetermined angular position of the driven shaft. An adjustment shaft is provided which can be rotated to rotate the driven shaft through the transmission gearing, a clutch being connected between the driving member and the transmission gearing to permit by disengagement of the clutch the adjustment shaft to rotate the driven shaft relatively to the driving member. A radial projection, e.g.