Abstract: The present invention is relative to a fuel cell and an electrode module forming the fuel cell. The electrode module EM supports an electrolyte film (11) containing a proton conductor, capable of conducting protons under a non-humidifying condition, by a frame (20) of a preset shape. A fuel cell (30) includes an electrode module EM and a cooling channel on at least one side of this electrode module EM. This electrode module EM is made up by a frame (20) supporting the electrolyte film (11), a film of a porous fuel transmitting material (17) carrying a catalyst and a film of a porous oxygen transmitting material (18) carrying a catalyst layer and particles of a hydrophobic material. This fuel cell can be driven under a dry environment and under broad operating temperature conditions. In addition, scalable cells from a cell of a small capacity to a large capacity may be constructed with the same module.

Abstract: A magnetic tape cassette for use in a magnetic recording/reproducing apparatus has a sliding plate provided on a lower surface to selectively cover and expose insertion apertures that open into the interior of the cassette. A front lid is provided which may be pivoted to either expose or cover a front opening in the cassette through which tape may be withdrawn for a recording/reproducing operation. When the front lid is in its closed position and the sliding plate covers the insertion apertures, the front lid is locked in its closed position. The magnetic tape cassette is thereby closed to prevent dust, oil and other contaminants from damaging the magnetic tape within.

Abstract: A novel microphone assembly including three microphones which are rotatably or pivotably supported relative to each other and relative to a supporting handle housing structure wherein the left and right microphones rotate the same amount relative to a center axis of the microphone structure and wherein the center microphone can be extended different lengths and directed in different directions so as to vary the mixing ratio relative to the other microphones and including a ganged variable resistor to which the center microphone is connected so as to automatically control the mixing ratio between the signal from the center microphone with the two outer left and right microphones. The microphone assembly can be folded into a compact package and the microphone has superior localization characteristics for reproduction of sound.