Abstract: Power assist steering gear assembly for vehicle comprises a first unit including an elongated member linearly movable in opposite directions for pivoting of dirigible wheels. The elongated member comprises a rack portion engaged with a pinion connected to a steering shaft and a thread portion cooperating with a ball nut. The power assist steering unit further comprises a separate electric motor unit including an electric motor connected to the ball nut through rotation transmitting means to assist the linear movement of the elongated member.

Abstract: Power assist steering gear assembly for vehicle comprises an elongated member linearly movable in opposite directions for pivoting of dirigible wheels. The elongated member comprises a rack portion formed at a first axial position and engaged with a pinion connected to a steering shaft and a thread portion formed at a second axial position and cooperating with a ball nut. The power assist steering unit further comprises an electric motor unit coaxially arranged about the elongated member at a third axial position and including an electric motor connected to the ball nut through rotation transmitting means to assist the linear movement of the elongated member.

Abstract: A high pressure sodium vapor discharge lamp comprises an alumina tube envelope containing therein sodium, inert starting gas, buffer gas source of mercury or cadmium and discharge electrodes sealed in the envelope, inner diameter d (in mm) of said tube envelope and an average potential gradient E in volt/cm having the relationE.gtoreq.37.7-2.05d,and further comprisesA radiation suppressing means for selectively absorbing red radiation of a wavelength longer than 620 nm said radiation suppression means being disposed on the wall of outer bulb enclosing the tube envelope;The lamp achieves higher color temperature and higher general color rendering index than the conventional one without increasing its tube voltage and is suitable for highly efficient indoor illumination.

Abstract: A high pressure mercury vapor lamp having an outer bulb with a plural-phosphor coating on the inside surface thereof. A first phosphor provides for emission peaks within the range of wavelengths between 440 and 540 nm and contains strontium chloroapatite, barium magnesium aluminate, strontium chlorosilicate, barium magnesium aluminate, or barium strontium silicate, each activated with di-valent europium. A second phosphor includes yttruim vanaphosphate activated with tri-valent europium which has emission peaks between 600 and 720 nm.