A first rotor is fixedly carried by a shaft and a second rotor is loosely carried by the shaft. A coupling means couples the second rotor to the shaft through an interference fit with the second rotor. The two rotors are then adjusted with respect to one another by rotating the shaft while holding the second rotor in place.
A first rotor is fixedly carried by a shaft and a second rotor is loosely carried by the shaft. A coupling means couples the second rotor to the shaft through flanges extending from the rotor and pinching the shaft. The two rotors are then adjusted with respect to one another by rotating the shaft while holding the second rotor in place.
The potentiometer consists of two halves. Each half has a base plate (5,6) ending in soldering lugs (51,61,62). One part each of a casing (1 or 2) and a rotary driver half (3 or 4, respectively) are molded to each base plate in a plastics injection molding process. The two potentiometer halves are interconnected at their casing parts (1,2), on the one hand, and at their rotary driver halves (3,4), on the other hand, by ultrasonic welding. For this purpose a circumferential thickening (15,47) each is provided of tapering shape. A slider spring (8) on the one hand has slider lobes (81) which slide on a resistor path of a resistor plate (7) and, on the other hand, slider lobes (80) which slide on the base plate (5) opposite the resistor plate (7). Hereby the central or potentiometer tapping is effected electrically at this base plate (5) and the soldering lug (51) connected to the same.
A variable rate, bi-directional slew control employing a dual-concentric potentiometer having a first shaft attached to a first spring for urging it to remain in an extreme clockwise position and a second shaft urged by a second spring to remain in an extreme counterclockwise position wherein an extension of a sleeve provides the means for manual manipulation of the first shaft in a counterclockwise direction and the second shaft in a clockwise direction. A first tap associated with the first shaft is electrically connected to a first off-zero detector which is itself connected to a pulse generator which is in turn connected to an up input of an up/down counter. A second tap associated with the second shaft is electrically connected to a second off-zero detector which is connected with a second pulse generator which is in turn connected to a down input of the up/down counter.
