  Let $V$ be the two-dimensional simple module and $M$ be a projective Verma
module for the quantum group of $\mathfrak{sl}_2$ at generic $q$. We show that
for any $r\ge 1$, the endomorphism algebra of $M\otimes V^{\otimes r}$ is
isomorphic to the type $B$ Temperley-Lieb algebra $\rm{TLB}_r(q, Q)$ for an
appropriate parameter $Q$ depending on $M$. The parameter $Q$ is determined
explicitly. We also use the cellular structure to determine precisely for which
values of $r$ the endomorphism algebra is semisimple. A key element of our
method is to identify the algebras $\rm{TLB}_r(q,Q)$ as the endomorphism
algebras of the objects in a quotient category of the category of coloured
ribbon graphs of Freyd-Yetter or the tangle diagrams of Turaev and Reshitikhin.
