초록 ▼

An apparatus for controlling the actuation of a light for illuminating the work zone adjacent the operative end of a dental handpiece. The apparatus includes (a) switch for actuating a light source when a signal is transmitted to the actuating switch from the power transmitting line for the dental h

An apparatus for controlling the actuation of a light for illuminating the work zone adjacent the operative end of a dental handpiece. The apparatus includes (a) switch for actuating a light source when a signal is transmitted to the actuating switch from the power transmitting line for the dental handpiece, (b) line for transmitting the signal to the actuating switch from the power transmitting means for the handpiece, and (c) delay shutoff switch associated with the actuating switch for maintaining the light source on for a predetermined period of time after transmission of power to the operative end of the handpiece is terminated and then causing the light source to be extinguished at the end of the predetermined period of time.

대표청구항 ▼

A control apparatus for controlling the actuation of a light source for illuminating the region adjacent the operative end of a dental handpiece having associated therewith a fluid-driven turbine, means associated with the turbine to securely receive and to rotate a drill when the turbine is driven

A control apparatus for controlling the actuation of a light source for illuminating the region adjacent the operative end of a dental handpiece having associated therewith a fluid-driven turbine, means associated with the turbine to securely receive and to rotate a drill when the turbine is driven by the fluid, means for transmitting drive fluid to the turbine, a control means associated with the fluid-transmitting means so that when the control means is actuated the turbine is driven by the fluid, light-producing means, and fiber optic means to transmit light from the light-producing means to the region adjacent the operative end of the handpiece for illuminating the area to be drilled; said control apparatus comprising: (a) a fluid-actuated switch for actuating the light-producing means when fluid is transmitted to said fluid-actuated switch from the drive fluid transmitting means; (b) means for transmitting fluid from the drive fluid transmitting means to said fluid-actuated switch; and (c) delay shutoff means associated with said fluid-actuated switch for maintaining the light-producing means on for a predetermined period of time after transmission of fluid to the turbine is terminated and then causing the light source to be extinguished at the end of said predetermined period of time.