By providing a single house which incorporates an elongated probe receiving zone interconnected to a pump member, a plurality of automated valves, a disinfectant dispensing chamber, a water supply, and a control system for automatically cycling each of the components to achieve the desired result, a fully automated disinfection system for transesophageal ultrasonic probes is achieved. The cutting device is useful in a subsea shut off device which is latched to a template at surface and run to the sea floor on a casing string which is drilled into place and converted into a riser on a single trip. The drive operates, with the interconnection of the transmission element, on the locking mechanism in order to open the latter or pull the latter shut. An internal locking mechanism for positive interlocking of adjoining tubes can be accessed externally for ease of servicing. Layer of silicon nitride is removed afterwards, and a polysilicon layer is conformably formed on the substrate. This bobbin has coaxially aligned throughholes defined therein into which core legs of generally T-shaped first and second core pieces are inserted from opposite directions, respectively.