Medical electronic apparatus and components
US4112950A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1976 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Oct 22, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2300/014
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The apparatus includes a high frequency, high voltage generator, a therapeutic instrument for applying an electric current to a patient, a compound electrical power and control cable connected between the generator and the instrument, and a switch for selectively connecting at least one signal current conductor in the cable to a therapeutic current conductor in the cable to complete a circuit through an activating device for controlling the action of the generator. The cable includes a multiple strand bare therapeutic current conductor wire and preferably two single strand wires with film coatings of low voltage insulation, all of the wires being enclosed in a protective sheath of high voltage insulation. A high voltage is impressed on all of the wires but the voltage differential is very small so that the bare conductor is adequately insulated from the others by the film coatings, with a resulting savings in weight and cost of wire and insulation and improved flexibility. The cable passes into an instrument holder provided with a switch for selectively connecting the signal current conductors to the therapeutic current conductor for control purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.