The tangent conoids family which depends on the ruled surface

Abstract

In this study, a new congruence [A**] has been defined by putting a tangent right conoid on each line of a ruled surface $(A_1(s))$ of a line congruence [A]. Then, by considering special case of the congruence [A**] which has been defined in the previous part, the concepts of tangent congruence, drall and the relation among Blaschke vectors of Blaschke trihedrons, having common line $A_0$, has been examined for this special case. At the end of this study, the concept of tangent congruence for some special congruences has been examined.