Abstract: A packaged piezoelectric oscillator is provided which comprises an insulating package body, a piezoelectric element, and a lid member. The package body has an upwardly open housing groove which has a bottom surface formed with oscillator electrodes at both ends of the housing groove. The piezoelectric element is fixedly received in the housing groove of the insulating package body and held in electrical conduction with the respective oscillator electrodes. The lid member is attached to the package body to close the housing groove. The housing groove has an intermediate wider width portion, and each end of the housing groove is provided with a pair of end positioning walls projecting toward each other for providing a narrower width portion between the pair of end positioning walls.

Abstract: Detachable chevron-shaped panels that fit within chevron-shaped apertures in the cover of an exit sign. The panels are dimensioned to fit integrally into the apertures in order to withstand years of stress, temperature changes, and wear and tear but continue to perform in a light-fast and reliable manner. Yet they may be easily installed from the exterior of the exit sign, with minimum risk that they will fall into the interior during installation. Surprisingly, the present devices permit such easy installation without the need to use conventional "slide `n` snap" exit sign arrow fasteners that usually allow reliable installation but have proven to be destructive of a secure fit and light fastness. The panel accomplishes this by employing at least three tabs positioned in a certain manner about the perimeter of each wing of the panel which engage the (preferably bevelled) edge of the chevron-shaped aperture.

Abstract: Method and device for preserving the meat of a slaughtered bird or a part thereof, in which the bird or the part thereof is firstly cooled in a short time until the core temperature of the meat is lower than the temperature at which heat-shortening occurs at the prevailing acidity; and next the bird or the part thereof is cooled further, in the course of which the core temperature of the heat remains higher than the temperature at which cold-shortening occurs at the prevailing acidity. During the cooling steps the surface is cooled to such a temperature that the germ counts or decay-causing and pathogenic micro-organisms remain below a predetermined value.