Its construction was that of a triple-sized modern telephone. The hollow ear piece was made in such a form to focus the sound waves direct to the operator's ear. A thin metal diaphragm was secured to the opposite end, a pair of magnets with a pivoted armature was secured to the frame of the armature, and connected with the diaphragm by means of a strut, thus keeping the armature from contracting poles of the magnets, which were energized by a battery current. When the current was closed, the armature held the diaphragm in magnetic suspension. The slightest change in the current manifested upon the diaphragm and upon all those on the same line. It was decided best to move everything in connection with developing and manufacturing this project to House's shop in Bridgeport, . also taking Royal House (who was then over 70 years old) and his wife with them.