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HEAT CHAMBER TEMPERATURE [5 records]

Record 1 2003-05-15

English

Subject field(s)
  • Fire Warning Devices
CONT

A pneumatic rate-of-rise spot detector consists of a small dome-shaped air chamber with a flexible metal diaphragm in the base. A small metering hole allows air to enter and exit the chamber during normal rise and fall of atmospheric temperature and barometric pressure. In the heat of a fire, however, the air within the chamber expands faster than it can escape through the metering hole. This expansion causes the pressure within the chamber to increase, forcing the metal diaphragm against contact points in the alarm circuit. An alarm signal to the system control unit results. This type of detector is most often combined in one unit that also has fixed-temperature capability.

OBS

The spot detector monitors smaller areas than the line detector.

French

Domaine(s)
  • Alarme-incendie
CONT

Le détecteur ponctuel thermovélocimétrique pneumatique est constitué d'une petite chambre aérothermique en forme de dôme et d'un diaphragme en métal flexible situé dans la base. Un petit trou permet à l'air d'entrer et de sortir de la chambre aérothermique lors des fluctuations normales de la température et de la pression barométrique. Toutefois, sous l'effet de la chaleur dégagée par un incendie, l'air qui se trouve dans la chambre aérothermique se dilate plus rapidement et ne peut pas s'échapper par le trou. Cette dilatation entraîne une augmentation de la pression à l'intérieur de la chambre aérothermique et force le diaphragme de métal à toucher les points de contact du circuit d'alarme. Un signal d'alarme est alors déclenché à l'unité de contrôle du système. Ce type de déclencheur est souvent combiné à un dispositif qui est également thermostatique.

Spanish

Save record 1

Record 2 1998-04-24

English

Subject field(s)
  • Space Centres
  • Space Exploration Equipment and Tools
CONT

Environmental Control Systems Trainer. Additional training in the operation of the environmental control system was provided by the environmental control systems trainer which was a heavy shell mock-up with a prototype spacecraft environmental system. The device used was delivered to NASA in November 1960 and installed in a man-rated vacuum chamber at the U. S. Naval Air Crew Equipment Laboratory in Philadelphia(fig. 10-1(1)). During December of 1960 and January of 1961, the astronauts participated in a program of system familiarization that included being exposed to a simulated reentry heat pulse and approximately 2 hours of the expected postlanding temperature. During these runs, the astronauts wore the pressure suits and became familiar with function of the suits when associated with the environmental control system. However, since a provision had been made for simulating the suit function in the procedures trainer, this type of training was not considered essential This was particularly true since the astronauts received further first-hand familiarization to the environmental control system by participating in the preflight checkout of the spacecraft environmental control system at the launch site.

French

Domaine(s)
  • Centres spatiaux
  • Équipement et outillage d'exploration spatiale
OBS

chambre à vide accessible à l'homme : terme extrait de la base de données du Centre national d'Études spatiales (Saclay - France).

Spanish

Save record 2

Record 3 1997-12-29

English

Subject field(s)
  • Brewing and Malting
  • General Scientific and Technical Vocabulary

French

Domaine(s)
  • Brasserie et malterie
  • Vocabulaire technique et scientifique général

Spanish

Save record 3

Record 4 1987-01-06

English

Subject field(s)
  • Aeronautical Engineering and Maintenance
CONT

... laboratory based studies where the tests have been made in a draught-proof, heat test chamber, have been conducted. It is significant that the laboratory temperature measurements are considerably higher than those experienced in the field.

French

Domaine(s)
  • Aérotechnique et maintenance
CONT

(...) des études en laboratoire ont été effectuées et, dans ce cas, les essais se sont déroulés dans une enceinte d'essais d'échauffement à l'abri des courants d'air. Il est important de noter que les mesures de température effectuées en laboratoire sont nettement plus élevées que celles qui sont effectuées sur le terrain.

Spanish

Save record 4

Record 5 1979-12-19

English

Subject field(s)
  • Breadmaking
  • Pastries
CONT

In the Spooner travelling oven the hot air circulates rapidly in a closed circuit, the small temperature drop on each cycle being made good by heat from the burner. The hot air enters the baking chamber, top and bottom, through patent nozzles, which ensure that the heat is evenly distributed over the whole length and width of the conveyor.(...) The oven is built in one or more sections(...) Each section is provided with a separate heating system and burner.

OBS

spooner travelling oven.

Key term(s)
  • Spooner traveling oven

French

Domaine(s)
  • Boulangerie
  • Pâtisserie
CONT

Fours à convection forcée. Ces fours brevetés (système Spooner d'origine anglaise) (...) ont pour principe d'utiliser la chaleur par convection forcée plutôt que le rayonnement et la conduction: ils projettent donc l'air chauffé sur le produit à cuire, à une vitesse assez élevée. Ce four-tunnel est constitué de diverses sections ou "chambres de pression" indépendantes (...), équipées de fentes ou "buses spooner" placées au travers de toute la largeur de la bande et suffisamment rapprochées pour que la totalité de la bande (haut et bas) soit assujettie aux flux d'air chaud en provenance, à grande vitesse, de la chambre de pression.

Spanish

Save record 5

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