Abstract: A line isolation monitor which monitors ground faults on a normally ungrounded AC power line. The monitor uses a low voltage sensing current having a frequency greater than the frequency of the power line. The monitor tests each side of the power line independently. Provision can be made to indicate a double fault to ground. Further refinements include a means to monitor the connection between the monitor device and ground as well as a means for confirming continuity of annunciator lines associated with the line isolation monitor.

Abstract: A seawater battery comprises a plurality of bipolar electrodes. Each bipolar electrode includes an anode and a cathode attached to the alternate sides of a barrier. The barrier is a sheet of thin flexible plastic material. The edges of the barrier extend beyond the edges of the anode and cathode. Opposing edges of the barrier are folded against the opposing edges of the anode so as to form flanges. A suitable number of the bipolar electrodes, along with suitable endwalls and end electrodes, are assembled so that the flanges of any particular bipolar electrode overlap the flanges of an adjacent barrier. An adhesive tape is wrapped around the assembly sealing the several edges of the barriers, including the flanges, and holding the bipolar electrodes in place. Alternately, a hot melt may be used to seal some or all of the battery edges. Because the barriers are very thin, the battery is compact and economical of space. Further, it is economical to construct.

Abstract: A storage battery with a carrying device includes a pair of flexible ears formed as a part of the battery and a removeable handle attachable thereto.

Abstract: An alkaline primary battery has at least two cells. The cells are of the type where the anode material (zinc) is in the form of a powder suspended in a gel and is located in the central portion of the cell. The anode current collector for the second cell is made as an integral portion of the first cell and takes the form of a metal rod dependent from the base of the first cell. The cells are built without anode current collectors. In the assembly of a battery from such cells, the anode current collector attached to a first cell is forced through the cover of a second cell and embeds itself in the anode structure of the second cell. The anode collector for the first cell is in the form of a loose metal rod and is similarly forced through the cover and into the anode structure of the cell. The end cell opposite to the first cell is similar to the other cells except that it does not have a current collector attached to its base.

Abstract: A Multicell seawater battery is provided with a top venting means. The venting means comprises a series of passages each located above and communicating with a particular cell. The several passages are connected by ports alternately at one end and at the other end of the cells to form a zig-zag conduit at the top of the battery. A similar passage may be located at the bottom of the battery. The improved porting reduces electrical losses to ground and also reduces the background noise of the battery.

Abstract: Wet formed negative storage battery plates are dried without oxidation by a drying cycle including a first portion where dry steam is circulated about the plates, and a second portion where the plates are further dried and cooled in carbon dioxide containing atmosphere until they will not oxidize when exposed to air. An apparatus for carrying out this drying cycle is also described.

Abstract: A primary seawater battery employs a metallic sheet anode and a sheet cathode. The cathode is lead chloride including an addition of about 1 to about 10 parts by weight of lead oxide per 100 parts by weight of lead chloride. The lead oxide may be litharge, litharge containing lead, red lead or lead peroxide. Other ingredients which may be present in the cathode are carbon black for conductivity and an organic binder such as polyfluoroethylene. The battery is characterized by having a shortened rise time compared to batteries without the lead oxide additive, especially when the battery is used at low temperatures.