The ornamental design for a head of adjustableelectricbed, as shown and described.
FIG. 1 is a perspective view of a first preferred embodiment of the present design.
FIG. 2 is a front view of the first preferred embodiment of the present design.
FIG. 3 is a front view showing the bed in a folded condition.
FIG. 4 is a front view showing the bed in a second folded condition.
FIG. 5 is a front view showing the bed in a third folded condition; and,
FIG. 6 is a perspective view of a second preferred embodiment of the present design.
The broken lines showing of structural feature is indeed for the purpose of illustrating non-claimed subject matter and forms no part of the claimed design.