Dental treatment apparatus

Claim 1

Dental treatment apparatus comprising at least one dental treatment instrument, such as a drill; a control data store in which certain fixed control data values, such as certain drill speed values, are stored and are retrievable when required; a display device suitable for displaying variable values; control means for the instrument being coupled with the control data store for varying of the control data starting from said fixed control data values, the control data store being settable by the control means with instantaneous values of control data as fixed values to be stored; a data converter for converting the instantaneous values of control data into corresponding instantaneous operating data values to be displayed by the display device; said control member converting the control data emitted in each instance by the control data store into corresponding analog voltages, said voltages being modified by the emission of an analog voltage corresponding to a desired modification, and which act as operating signals for the instrument; means for varying the amplitude of the analog voltages corresponding to the control data; and control means comprising a digital-analog converter, an adding circuit having an input side connected to an output of the digital-analog converter, a voltage-emitting device connected to the input side of the adding circuit, and means for adjusting the voltage emitted by the voltage-emitting device, and in which an output of the adding circuit serves as a source from which said operating signals are derived and which forms new control data; a plurality of dental treatment instruments, adjusting members associated each with a respective instrument and being suppliable with the output voltage emitted in each instance from said adding circuit as an analog operating data signal, and an analog digital converter being connected to said adding circuit and being connected to said display device to supply a digital display signal thereto.