In equity, these principles operate to protect both the assignor and the assignee. Four of these were held by Williams as an assignor of Western Cartridge Company (Winchester). The assignor must receive consideration for the agreement, otherwise the assignment will be ineffective. Wm Morrison of Des Moines is Assignor to the Hess Electric Company. The assignor must not retain any sort of reversionary interest in the right to possess. With an assignment, the assignor transfers the complete remainder of the interest to the assignee.