Control circuit for an electrical device
First Claim
1. A control circuit for a radiofrequency electrosurgical device including a radiofrequency generator, a handpiece, an active electrode means supported on the handpiece, and switch means mounted in the handpiece which comprises photovoltaic cell means and relay means connected in series with the switch means, means for illuminating the photovoltaic cell means, whereby closing of contacts of the switch means causes acturation of the relay means, and means connected to the relay means for causing the radiofrequency generator to power the active electrode, voltage at the switch means being limited by the voltage produced by the photovoltaic cell means.
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Abstract
A control circuit for an electrical device which includes a switch that is electrically isolated from other components. The switch is connected in series with a photovoltaic cell and relay means. The photovoltaic cell is illuminated so that closing of contacts of the switch causes actuation of the relay means. The relay means is connected to actuate the electrical device. Voltage at the switch is limited by the voltage produced by the photovoltaic cell.
107 Citations
8 Claims
- 1. A control circuit for a radiofrequency electrosurgical device including a radiofrequency generator, a handpiece, an active electrode means supported on the handpiece, and switch means mounted in the handpiece which comprises photovoltaic cell means and relay means connected in series with the switch means, means for illuminating the photovoltaic cell means, whereby closing of contacts of the switch means causes acturation of the relay means, and means connected to the relay means for causing the radiofrequency generator to power the active electrode, voltage at the switch means being limited by the voltage produced by the photovoltaic cell means.
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8. A control circuit for an electrical device including a handpiece and switch means mounted in the handpiece which comprises photovoltaic cell means and relay means connected in series with the switch means, means for illuminating the photovoltaic cell means, whereby closing of contacts of the switch means causes actuation of the relay means, and means connected to the relay means for causing actuation of the electrical device, voltage at the switch means being limited by the voltage produced by the photovoltaic cell means.
Specification