The push buttons that are used to position the unit in upward and downward direction are replaced by two photocells. Each position is replaced by a photocell. The motor that moves the unit up and down is connected with two photocells, one to enable it to move up and the other to enable the unit to move down. The push buttons that are used to position the unit back rest forward and backward are replaced by two photocells.The motor for the movement of the back of the unit is connected to two photocells, one to move the back forward and one to move it backward. The push button that is used to fill the water cup, or the foot control button that deliver water, are replaced by a photocell The light source is adjusted to a motor that is directed by a photocell that responds to a light source, to avoid the touching of the light source and directing it onto the patient mouth. The unit is supplied with UPS (uninterrupted power supply) to allow continuous power supply.
展开▼
