Abstract: A battery system for use in a battery-operated device, such as a rescue light or radio used in a hostile environment, employs at least one battery element contained within a tubular support member. In embodiments which employ multiple battery elements, the battery elements are in electrical communication with one another, illustratively by welding or soldering their teminals to one another. At one end of the tubular element, a terminal of the battery system is covered entirely by a seal formed of a resilient material. The seal additionally closes the entire end of the tubular member. At the second end of the tubular member, a second seal is provided for closing the second end of the tubular member, but not covering the second battery supply terminal. The battery system operates in conjunction with a housing for the battery-operated device which may have arranged therein a pointed contact which penetrates the first seal so as to achieve electrical communication with the first contact of the battery supply.

Abstract: A battery cell which comprises an anode element of magnesium alloy metal, a carbon or stainless steel current collector, and a manganese-dioxide-type cathode mix and electrolyte comprising mainly manganese dioxide with the addition of potassium monoperoxysulfate to substantially improve the open-circuit voltage of the battery cell and to substantially decrease polarization. Additions to said mix of such metal oxides as nickel oxide, lead dioxide, cobalt oxide, aluminum oxide, copper oxide, silver oxide or others substantially contribute to increased battery capacity. The addition of lithium chloride to the above improved battery cell in small amounts substantially increases the low-temperature range of these battery cells without improvement of battery capacity.

Abstract: A test apparatus is disclosed which is particularly adapted for testing survival-type radio transmitters in the field. The apparatus includes an enclosed metallic test chamber into which the antenna of the radio transmitter is placed. A movable load carriage within the chamber applies a load to a predetermined point on the antenna which results in simulating in the test chamber the radio frequency absorption/reflection characteristics of the antenna in free space. A direct measurement of the radio frequency energy absorbed by the load is thus indicative of the performance of the radio transmitter and its antenna in free space.

Abstract: A disc-type motor characterized by increased efficiency is disclosed. The motor includes first and second parallel spaced stator members made of magnetic material in fixed relation, each of the stator members having a flat circular shape and an even plurality of pie-shaped permanent-magnet poles thereon, illustratively eight in number. The facing poles on the stator members have opposite polarities. The motor further includes a disc-like rotor made of a non-conducting material rotatably mounted between the two stator members. Conducting wires are wound in a non-overlapping (single-layer) flat spiral configuration to form a number of coils equal to twice the number of poles per stator member, half adhered to each face of the rotor disc. Each coil encloses a pie-segmented area about equal to the area of one of the stator poles. On each face of the rotor the coils magnetically oppose one another, and the coils on one face of the disc are angularly offset from the coils on the other face of the disc.

Abstract: A mounting bracket for engaging a stored module for float-free release by engaging an enlarged upper portion and the lower portion of the module until after a first upward displacement of the module to then allow free lateral movement of the module. Only the enlarged upper portion of the module is engaged by a stationary upper retainer, so that after the upward displacement, the upper retainer leaves the body portion of the module free for lateral exit. A lower retainer engages the lower module portion. Because these retainers do not act frictionally, they allow unhampered upward movement of the module within the bracket.

Abstract: A disc-type motor characterized by increased efficiency includes first and second parallel spaced stator members made of magnetic material in fixed relation, each of the stator members having a flat circular shape and an even plurality of pie-shaped permanent-magnet poles thereon, illustratively eight in number. The facing poles on the stator members have opposite polarities. The motor further includes a disc-like rotor made of a non-conducting material rotatably mounted between the two stator members. Conducting wires are wound in a non-overlapping (single-layer) flat spiral configuration to form a number of coils equal to twice the number of poles per stator member, half adhered to each face of the rotor disc. Each coil encloses a pie-segmented area about equal to the area of one of the stator poles. On each face of the rotor the coils magnetically oppose one another, and the coils on one face of the disc are angularly offset from the coils on the other face of the disc.