U.S. Philips Corporation

Koninklijke Philips Corporation N.v.

Klaus Klinkenberg

Reinhard Kersten

Horst Horster

Holger Joachim Moench

Arnd Ritz

Martin Sonnek

Wilhelm Georg Hermann

The invention relates to a high-pressure discharge lamp with a substantially elongate bulb which has two neck regions and a vacuumtight discharge chamber in a central position. The invention further relates to a reflector lamp and a projection system comprising such a high-pressure discharge lamp. A disadvantage of known lamps is formed by the too high temperatures of critical components. According to the invention, therefore, it is suggested that the high-pressure discharge lamp is provided at least partly with a reflection layer at least in a neck region. The reflection layer reflects radiation in the entire spectrum (ultraviolet, visible, infrared) and is used in particular as a heat shield layer which reflects the radiation incident on the neck region at the lamp end and acting as heat radiation, so that an additional heating is prevented or at least reduced.

High pressure discharge lamp with reflection layer on the neck portion

A method of monitoring a gas discharge lamp, in which method an electrical test value related to the lamp operating voltage is detected, and to an arrangement for monitoring a gas discharge lamp comprising a control circuit for detecting an electrical test value related to the lamp voltage. A warning signal is generated when a test value is measured which corresponds to a clear reduction in the lamp voltage, for the purpose of better predicting the life of the lamps and the risk of explosion. The electrical test value may either be proportional (for example, a voltage which can be easily measured outside the lamp and which is preferably directly proportional to the lamp voltage) or inversely proportional (for example, the current supplied to the lamp) to the lamp voltage (burning voltage).

Method and arrangement for monitoring a gas discharge lamp

A method of achieving a comfortable temperature in the surroundings of a person, who is present in a room of low temperature, by means of a radiator is quickly reached and continuously maintained by continuously measuring the temperature in the surroundings of the radiator (18). While a direct thermal influence of the radiator is avoided, or the measurement is avoided, a required irradiation for the person is calculated from the temperature data by an electronic unit. The distance between the person and the radiator is measured, and the required power is provided to the radiator (18) in accordance with the calculated irradiation and the measured distance.

Method of achieving a comfortable temperature in a room, and device for

An electric smoothing iron is provided which has a soleplate (3) which has a low heat capacity and which is heatable by means of light energy produced by lamps (6), reflectors (7) being provided to reflect the light to the soleplate (3), and the temperature of the soleplate (3) being monitored by means of a sensor, which iron comprises a microprocessor (13) which receives the measurement values from the sensor (12) and compares said measurement values with presettable nominal values of a temperature control device (14), which microprocessor is connected to a power control unit (15) which acts as a half-wave control and operates the lamps separately, in series or in parallel.

Lamp heated iron with temperature control means

The invention provides a method of controlling the boiling power for a water-containing vessel (10) which can be heated by a cook-top (11), for example a light cook-top, the amount of water evaporating at atmospheric pressure being sufficient to maintain an air-steam interface such that any residual air is expelled from the vessel (10) by an automatically controlled supply of heating power (12).

Device for controlling the boiling power of a water-containing vessel

In accordance with the invention an arrangement for controlling the heating power for a vessel (10) which can be heated by a cook-top (11), for example a light cook-top, by means of a sensor-controlled electronic device (19) can perform more functions in that

Arrangement for controlling the heating power for a cooking vessel

The invention proposes a method of controlling the boiling power for a water-containing vessel (10) which can be heated by a cook-top (11), for example a light cook-top, the amount of water evaporating at atmospheric pressure being exactly such that any residual air is expelled from the vessel (10) by an automatically controlled supply of heating power (12).

Method of controlling the boiling power for a water-containing vessel

An air conditioner comprises an air-to-air heat exchanger; a fresh air supply duct, a fresh air by-pass duct, a used air exhaust duct, and a used air by-pass duct, the fresh air supply duct and the used air exhaust duct being respectively connected to the air-to-air heat exchanger, the fresh air supply duct having a part in common with the used air by-pass duct, and the used air exhaust duct having a part in common with the fresh air by-pass duct. Included are a condenser provided in the common part of the fresh air supply duct, and an evaporator provided in the common part of the used air exhaust duct, the condenser and the evaporator being parts of a heat pump. A blower is provided in the common part of the fresh air supply duct and is connected to the used air by-pass duct, and a separate blower is provided in the common part of the used air exhaust duct and is connected to the fresh air by-pass duct. A first three-way valve is arranged in the used air exhaust duct in front of the air-to-air heat exchanger, and a second three-way valve is arranged in the fresh air supply duct behind the air-to-air heat exchanger viewed in the direction of fresh air supply for switching the air conditioner into first, second and third modes wherein the air conditioner functions as a heat pump, a heat pump and a fresh air supplier, and a fresh air supplier, respectively.

Air-conditioner

A wall element, comprising a solar collector which is arranged between two panes and which comprises a number of rotatable absorber plates. One side of the absorber plates is provided with a non-selective black coating and the other side is provided with a selective, heat-reflective layer. The absorber plates are accommodated in evacuated, transparent tubes.

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Aachen, Germany

Klaus Klinkenberg