Abstract: A porous conducting particle, hydrophobic bonded, substrate supported electrode is prewetted with the electrolyte. A D.C. voltage is applied to the electrode to assist in the prewetting with the electrolyte. A soluble catalyst-containing material is then introduced into the electrode structure and the catalyst deposited within the electrode. By appropriate selection of the porous conducting particles and the catalyst-applying techniques, precise control of the location of the catalyst can be obtained. If graphite materials are used as the conducting particles, a catalyst-containing salt is allowed to dissolve in the electrolyte in the prewetted electrode, and the catalyst-containing material is reduced to the metal. If the reduction is done by reaction with a reducing gas such as hydrogen, the catalyst will be deposited only in those regions of the electrode at which there is an electrolyte-reactant gas interface which is in electrical-conducting relationship with the substrate.

Abstract: A keyhole-less magnetically actuated lock, the key having magnets borne on concentric rings rotatable by a dial, the lock having magnetically responsive switches (for example, reed switches) within the lock actuatable by the key, some of the switches providing a series GO function and some providing a parallel NOGO function. In one form, the GO function powers an electric motor within the lock to withdraw the lock bolts, and in another form the actuator is a thermo electric device. Several NOGO techniques are shown, including a toggled circuit breaker and a bucking coil in the motor. A circuit is shown for inverting the GO and NOGO functions to change the combination of the lock, and one embodiment shows placement of two magnets on one ring in the key to render the key unique. Another embodiment shows use of a covert grid of locator marks to direct correct placement of the key against the lock.

Abstract: An electrochemical cell electrode, having clearly segregated and structured hydrophobic gas channels and electrolyte-filled catalyst channels is provided in which the size and shape of the various passages are such that they offer little resistance to the passage of reactants and products. The electrode consists of alternate layers of porous hydrophobic material and porous hydrophilic catalyst-containing material. The electrode is formed by first depositing the alternate layers of materials and then cutting the structure in a plane at right angles to the plane of deposition at a thickness equal to that of the end product. Electrodes of varying size can be constructed of panels so produced.

Abstract: A porous conducting particle, hydrophobic bonded, substrate supported electrode is prewetted with the electrolyte. A D.C. voltage is applied to the electrode to assist in the prewetting with the electrolyte. A soluble catalyst-containing material is then introduced into the electrode and the catalyst deposited within the electrode. By appropriate selection of the porous conducting particles and the catalyst-applying techniques, precise control of the location of the catalyst can be obtained. If graphite materials are used as the conducting particles, a catalyst-containing salt is allowed to dissolve in the electrolyte in the prewetted electrode, and the catalyst-containing material is reduced to the metal. If the reduction is done by reaction with a reducing gas such as hydrogen, the catalyst will be deposited only in those regions of the electrode at which there is an electrolyte-reactant gas interface which is in electrical-conducting relationship with the substrate.

Abstract: A solid composition capable of self-sustained combustion to produce gaseous nitrogen and nonvolatile solids as its combustion products comprises a mixture of a first metal azide and the oxide or salt of a second metal which second metal is below the first metal in the electrochemical series and which is capable of being substituted by the first metal in the oxide or salt. Many combinations of various components may be used, but some care is required to select only those combinations in which the solid products are nonvolatile at the temperatures encountered during the combustion. A representative system employes iron oxide and sodium azide according to the following reactions:Fe.sub.2 O.sub.3 +6NaN.sub.3 .fwdarw.2Fe+3Na.sub.2 O+9N.sub.2 .uparw.Another embodiment of the invention generates mixtures of nitrogen and other gases such as carbon dioxide, carbon monoxide and/or water particularly suitable for use in lasers.