An improved sound generator includes a vibrating plate and a casing. The vibrating plate may become concave upon pressure and may return to its convex shape automatically to generate vibration and thus sound. An elastic plate is attached to the convex surface of the vibrating plate. The elastic plate is made of a material which may quickly return to its normal state after being compressed. The elastic plates prevents direct contact between an object or finger exerting a force and the vibrating p...

A generator set includes a permanent soundproof housing for housing a portable engine generator therein. The portable engine generator has wheels for moving the same and can be operated in the permanent soundproof housing. The portable engine generator can be taken out of the permanent soundproof housing by pulling the portable engine generator out of the permanent soundproof housing in a direction transverse to a direction of advance of the wheels, and thereafter moving the portable engine gene...

There is provided a compact and lightweight steam generator capable of efficiently and economically generating steam. An impeller is disposed in a housing. While the impeller is rotated by hot water poured inside the housing through a hot water inlet, the hot water is spread to generate steam inside the housing. By a ventilation fan to be operated in association with the impeller, the steam generated inside the housing is blown off into a shower room. The hot water poured inside the housing is d...

A fossil-fired steam generator includes a gas flue having a surrounding wall being formed by tubes which are mutually joined gas-tightly and which are disposed substantially vertically and can conduct an upward flow through them on the medium side. The tubes in a first or lower part of the gas flue have a greater internal diameter than the tubes in a second part of the gas flue located above. On one hand, this ensures reliable cooling of the tubes. On the other hand, even additional or above-ave...

A system for converting between parallel data and serial data is described. In the system (10), individual bits of the parallel data (12) are latched into individual registers (117). Each register (117) is coupled to a corresponding AND gate (110) which is also connected to receive phased clock signals. The output terminals of the AND gates (110) are connected to an OR gate (115). Using the system, with appropriately phased clocks, the parallel data is converted into serial data.

A clock generator comprising inverters I.sub.1A, I.sub.1B, I.sub.2A, a NOR circuit NO.sub.1, an inverter I.sub.3A and a NOR circuit NO.sub.2 . . . which transmit sequentially an input clock signal A, D flip-flops DF.sub.1, DF.sub.2, DF.sub.3 . . . which latches the input clock signal at different positions during transmission, NAND circuits N.sub.1, N.sub.2, N.sub.3 . . . which output intermediate signals A1, A2, A3 . . . in response to latch data of the D flip-flops DF.sub.1 DF.sub.2, DF.sub.3 ...

In a generator assembly, outside air, taken from a suction hole into a fixed soundproof housing, is sucked into a portable engine generator covered by a soundproof case to operate an engine and cool the interior of the fixed soundproof housing. The exhaust gas of the engine and the cooling air of the soundproof case are exhausted outside through the exhaust air hole of the soundproof case and the external exhaust hole of the fixed soundproof housing without leaking into the fixed soundproof hous...

The annular chamber of a heat generator for generating of hot gas, which is placed downstream of a fluid flow engine and upstream of a turbine, is defined by an exterior wall and an interior wall which extend approximately axially. The exterior wall and the interior wall are connected with each other by a plurality of supports extending radially. These supports have in their interior at least one supply conduit for a fuel and at least one further conduit for conveying an air flow. Furthermore, t...

To provide a power generator capable of replacing thermal generators, which is capable of realizing large amounts of power at low cost while using almost no fossil fuels and without polluting the environment. A solution comprising a solvent, which itself does not dissociate, having added thereto a substance which dissociates in the solvent, stored in the interior of a container having an inner surface possessing corrosion resistance and insulating properties, wherein an anode electrode having a ...

A three phase four pole synchronous generator winding is shown, having three parallel connected circuits per phase, for a stator with 63 winding slots, each circuit having seven series connected coils, with particular application to very large nuclear or fossil fuel generators and with emphasis on low cost.