Abstract: Apparatus and methods for holding and cleaning non-permeable contact lenses which includes the application of an electromagnetic field about the contact lenses which are held in a cavity containing a conductive solution and an adsorbent membrane to capture the contaminants being removed from the lenses. Proteins, lipoproteins and other contaminants adhere to the surface of non-permeable lenses. An adsorbent is positioned between the lens and an electric current source so that current flows from the current source through the adsorbent and over the surface of the contact lens so that contaminants on the lens are loosened and migrate to the adsorbent to which they adhere, thus permitting effective removal from the solution.

Abstract: Apparatus for and method of sterilizing medical and laboratory devices and cleaning contaminants from contact lenses at low voltages, the apparatus including a housing carrying a sterilizing and cleaning well, electrodes, appropriate controls and a power source and the method comprising the steps of positioning a contact lens and an adsorbent so that the adsorbent is disposed between the contact lens and an electric current source, immersing the contact lens, the adsorbent, and the current source in a saline or other appropriate solution, and then applying electric current from the power source through the adsorbent and only over the surface of the contact lens so that contaminants carried by the contact lens migrate to the adsorbent.

Abstract: A solid state trigger circuit provides variable period output signals within a timed sequence of signals for controlling conduction angle firing of thyratron type switching devices in an A.C. phase line. A bi-stable multivibrator receives timing signals derived from the alternating current in the phase line which are out of phase with each other. The timing signals oscillate the multivibrator at a desired timing rate to produce an output of the multivibrator which has voltage transition spikes at the beginning of each positive circle of the timing signals. A saw tooth wave form with a linear voltage input control signal indicative of a desired time period pulse width provides a square wave trigger output signal with signal pulse periods equal to the desired pulse width.