| 摘要 |
<p>A chair for dental treatment having a seat proper with operating mechanisms, comprising power circuits for driving the respective operating mechanisms, position detectors for detecting the movements of the seat proper, a power supply connected to said position detectors, a presetting section connected to the position detectors, memories connected to the respective position detectors, manual control sections connected to the respective power circuits, an automatic control section connected to the power circuits, switch sections provided in the respective power circuits and adapted to close when the respective manual control sections are in operation, memory-reading sections connected to the respective memories, switches provided in the respective power circuits and adapted to close by a momentary operation of the automatic control section and to open by the action of the respective memory-reading sections, and the former switch sections being connected in parallel with said latter switch sections respectively.</p> |
