Abstract: A multi-wire telephone system which facilitates voice and data communication between any two telephones connected to each other with one of a plurality of standard shielded twisted-pair cables. The telephones, which are battery-powered, feature standard telephone operation without a central switching and control station or PBX. Each telephone is provided with a microprocessor which can generate and decode all signals necessary to establish communication with any other telephone in the system. Since a PBX is not required, a break in any phone line will result in two systems operating independently of each other although somewhat degraded performance can be expected, depending upon the nature of the break. Whenever communication is established between two stations in the system, a direct current bias is impressed on the cable interconnecting those stations such that all other stations in the system can determine that that particular cable is in use and can select another cable for communication.

Abstract: A multi-cell battery structure in which a stacked array of cells are compressively positioned within an encasement means. Each cell comprises a lithium anode member and a depolarizer pellet adapted to abut the inner surface of encasement means. The depolarizer pellets with or without a cathode screen include a central opening through which lithium from the cell anode is extruded during assembly to form a central column of lithium. The multi-cell array is insulated from the encasement means so that only the depolarizer pellet or associated cathode screen is in contact therewith. A terminal pin, insulated from and positioned through the encasement means is embedded into the central column of lithium to provide electrical contact with battery anodes.

Abstract: The invention relates to a two-celled battery for use in cardiac pacer devices which comprises an outer encasement member and first and second internal cell elements. Each of the first and second cell elements includes an insulating cup, a lithium anode positioned within the cup, and a cathode positioned in contact with said anode. Each of the insulating cups includes an opening therethrough such that the lithium anode in the first cell makes contact with a terminal mounted through and insulated from the encasing means and the anode of the second cell is electrically in contact with the cathode of the first cell. The insulating cup of the second cell is positioned within the insulating cup of the first cell and both first and second cells are positioned within the encasing means such that the terminal contact with the first lithium anode and the encasing means is in contact with the cathode of the second cell.

Abstract: A battery structure using a plurality of cells in stacked array wherein each cell comprises an anode having a centrally positioned opening and flange positioned about the periphery of the opening for contact with the periphery of the opening of an adjacent anode. Each cell includes a pelletized depolarizer material that extends beyond the perimeter of the anode but coextensive with the anode flange. An outer encasement member receives the stacked array so that the depolarizer pellets are in electrical contact with the inner surface of the encasement. The encasement means includes a top member having an opening located to align with the openings in the anode and anode collector positioned through said opening in the top member and electrically insulated therefrom and in electrical contact with each of said anode flanges.

Abstract: A combination seismic/magnetic transducer capable of detecting movement in a magnetically-permeable body or vibration within the body while it is stopped.

Abstract: The present invention relates to a depolarizer for use in a lithium halide battery which comprises a halogen and a charge transfer complex consisting of the halogen and an organic component of (a) quaternary amine halide selected from the group consisting of (i) polyvinylalkylpyridinium halide or polyvinylalkylquinolinium halide and (ii) poly [N,N'-dialkyl 1,2 bis (4-pyridinium halide)] ethylene or poly [N-alkyl 1,2 bis (4-pyridinium halide) ethylene] and (b) phenyl methane dyes wherein said halogen is present in an amount of from about 3 to 50 parts by weight for each part of organic component.

Abstract: A telephone system is provided which requires no central office. All the stations on the system are interconnected by a single line or cable and each station includes a computer which carries out the necessary switching. Each station is then able to call any other station, or to respond to a call, without requiring any central office. Frequency division multiplexing is used to permit a number of conversations to be carried on simultaneously and two frequencies are assigned to each conversation to permit duplex operation. A page capability is also provided.

Abstract: The present invention relates to a lithium halide primary cell having means to indicate its end of life. The cell includes at least one lithium anode and a cathode in contact with a major surface of the anode wherein the indicating means comprises a stepped portion on the major surface of said anode which is not in contact with the cathode. The stepped portion of the anode comprises a surface area of from about 40 to 60% of the area of the major surface in contact with the cathode and about 15 to 5% of the total thickness of said anode.

Abstract: The present invention relates to a lithium halide battery structure comprising an outer metal envelope and top portion which is hermetically sealed to the envelope. The top portion includes an insulator conforming to and positioned thereon to the base configuration of the top portion and a support means having a base configuration substantially the same as the insulator. The support means also includes a flange depending from the support base and a pair of spaced apart post holders integral with said flange. First and second posts are positioned in the post holders with a metal anode collector screen positioned between and attached to said posts. The first post extends through the support means, insulator and top portion to define the anode terminal. The second post terminates in the associated post holder. A first and second pair of lithium anodes are pressure bonded together to sandwich therebetween the support means and anode collector screen.

Abstract: The invention relates to an iron/lithium anode material for use in thermal batteries which comprises about 15% to 30% by weight lithium. Thermal batteries made from such anodes are also disclosed. The anode comprises particulate iron bound together by the surface tension of the lithium which wets the iron particles. A method is disclosed for the manufacture of the anode material which includes adding iron powder to a molten lithium and mixing to form a homogeneous mixture. The mixture is cooled to form an ingot and rolled into strips for fabrication into anode configurations.

Abstract: The present invention provides a means for compensating for temperature induced variations in the span and zero signals of an electrochemical detector. The invention comprises a first compensating circuit electrically connected to the output of the detector and includes a first thermistor and a first amplifier which compensate for all variations in the span signal as well as some variation in the zero signal. A second compensating circuit comprising a second thermistor and a power source and voltage divider network electrically connected to the second thermistor for adjusting zero current wherein the output of the second thermistor is algebraically added to the output of the first compensating circuit by a second amplifier connected to the outputs of the first and second circuit and includes a resistance feedback loop to the output of the second thermistor.

Abstract: A lithium halide battery appropriate for low-cost, mass production is disclosed in which the battery comprises an outer encasement member having top and bottom portions and an opening through one with at least one pelletized depolarizer positioned within the encasement member and in electrical contact therewith. The battery includes a lithium anode in contact with the depolarizer but electrically separated from the encasement member. At least one insulator means is positioned in contact with the anode and includes an opening therethrough located to align with the opening in the encasement. A terminal pin is positioned through the opening in the encasement member, but insulated from the periphery thereof, and in electrical contact with the anode through the opening in the insulator means.

Abstract: The present invention relates to a solvator plug for replenishing aqueous or non-aqueous solvents in devices such as electrochemical sensor cells. The plug includes a housing adapted to communicatingly mount to a cell or the like which houses a selected solvent for absorption by the cell. The solvent is maintained within the housing by means of an absorbant material or membrane and is delivered by virtue of osmotic pressure differences.

Abstract: An electrochemical cell for the detection of chlorine which includes a gold working electrode and a counter electrode, with or without a reference electrode, comprising either gold or platinum black which operate in a substantially non-aqueous electrolyte consisting preferably of lithium perchlorate dissolved in an organic solvent selected from the group consisting of .gamma.-butyrolactone and propylene carbonate. A fixed potential is maintained between the working electrode and a referenced air electrode of between +500 to -700 mv, and, preferably, between -100 to -150 mv.

Abstract: An electrochemical cell for the detection of hydrogen sulfide which includes a gold working electrode and a counter electrode, with or without a reference electrode, comprising either gold or platinum black which operate in a substantially non-aqueous electrolyte consisting preferably of lithium perchlorate dissolved in an organic solvent selected from the group consisting of .gamma.butyrolactone and propylene carbonate. A fixed potential is maintained between the working electrode and a referenced air electrode of between 300 to 1100 mv, and, preferably, between 500 and 1000 mv.

Abstract: An improved lithium iodine battery, depolarizer therefor and method of making same in which the depolarizer comprises a pelletized particulate mixture of iodine, an organic polymer of either poly-2-vinylpyridine or poly-2-vinylquinoline and a charge transfer complex consisting of the selected organic polymer and iodine wherein the mixture contains from 3 to 30 parts of iodine for each part of total organic.

Abstract: A thermal battery comprising at least one cell, and preferably a plurality of stacked cells wherein each cell comprises an anode of a metal selected from the group consisting of alkali metals, alkaline earth metals and alloys thereof. Positioned against each cell anode is a homogeneous mixture, preferably in wafer form, of the electrolyte, depolarizer, and binder. The active depolarizer species of the present invention comprises iron pyrite (FeS.sub.2) which provides a lower internal resistance to the battery and improves start times over conventional depolarizers used in thermal batteries.

Abstract: The invention is addressed to a method for encapsulating a corrosive material with lithium wherein an encasing member having an opening is formed by folding and cold bonding a sheet of lithium into a receiving vessel. The corrosive material is poured into the vessel and the opening is pinched together to form a cold bond. The method is particularly adapted to the manufacture of primary cells where the vessel comprises the anode and the corrosive material is the cathode material.

Abstract: The invention comprises a lithium-halide battery in which the cathode and anode leads are embedded within the lithium anode encasing member and said method comprise folding a lithium sheet to form a lithium vessel as the anode encassing member so as to embed the cathode lead throughout a substantial portion thereof and for making batteries of various sizes using the same mold.

Abstract: A mixture of iodine with a poly-2-vinylpyridine.I.sub.2 or a poly-2-vinylquinoline.I.sub.2 charge transfer complex is an improved cathode material of a plastic state and in conjunction with a metal anode, for example lithium, provides primary cells with improved capacity and performance characteristics.