| 摘要 |
<p>A dental apparatus including a plurality of handpieces, each having associated therewith an electrical appliance such as, for example, a miniature drive motor, a generator for generating HF-oscillations, or an electrical valve for controlling the airflow of a turbine, whose operative condition (rotational speed, power output or valve flow-section) is variable through a change in the operating voltage by means of an adjusting element. The apparatus includes a single electrical supply module for all appliances, which is connected to a voltage source, and whose output provides tap-offs for the appliances, including a common adjusting element for all appliances which is connected in the control circuit of the supply module, through which the output voltage of the supply module may be varied between a minimum and a maximum value, the appliances having switch means associated through which, dependent upon use of one or another handpiece, one or another appliance may be connectable with the output of the supply module, and in which the supply module is so constructed so as to deliver the required operating voltages for obtaining the desired operating condition of the respective appliance.</p> |
