  Once chosen the dynamics in one frame, for example the rest frame, the
Bakamjian and Thomas method allows to define relativistic quark models in any
frame. These models have been shown to provide, in the heavy quark limit, fully
covariant current form factors as matrix elements of the quark current
operator. They also verify the Isgur-Wise scaling and give a slope parameter
$\rho^2>3/4$ for all the possible choices of the dynamics. In this paper we
study the $L=1$ excited states and derive the general formula, valid for any
dynamics, for the scaling invariant form factors $\tau_{1/2}^{(n)}(w)$ and
$\tau_{3/2}^{(n)}(w)$. We also check the Bjorken-Isgur-Wise sum rule already
demonstrated elsewhere in this class of models.
