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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Применить Всего найдено 3. Отображено 3.
29-09-1993 дата публикации

Measuring thermal characteristics of food freezing tunnels and cold stores

Номер: GB0002265460A
Автор: Bald, William Balfour, BALD WILLIAM BALFOUR, WILLIAM BALFOUR * BALD
Принадлежит:

The heat transfer characteristics at various locations in a food freezing tunnel or cold storage chamber are measured using a pair of thermocouples, one directly exposed to the local environment and the other separated therefrom by being located inside a sphere 30 of copper or aluminium and in good thermal contact therewith. The sphere is mounted on a PTFE arm 33. The thermocouples are otherwise close together, and their respective readings are recorded over a period of time, during which the thermocouple inside the sphere lags behind the other as the temperature changes. The heat transfer coefficient relating to the surface of the sphere and the surrounding cold gas is calculated from the readings obtained and gives a measure of the efficiency of the tunnel/chamber in cooling food. ...

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Номер записи: 1
12-01-1983 дата публикации

Cryosurgical probe

Номер: GB0002100987A
Автор: Bald, William Balfour, BALD WILLIAM BALFOUR, WILLIAM BALFOUR * BALD
Принадлежит:

Existing cryosurgical probes are normally cooled by a low boiling point liquid such as liquid nitrogen or by utilizing the Joule-Thomson expansion principle which requires a high pressure gas supply. The present invention adopts the single or multi-stage pulse tube principle to achieve probe tip temperatures down to about 85K using significantly lower gas supply pressures than Joule-Thomson devices. The lower gas supply pressure is well within the capabilities of small industrial compressor units thus making pulse tube cryoprobes available to surgeons in remote areas of the world where cryogenic liquids or high pressure gases are unattainable. ...

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Номер записи: 2
07-04-1988 дата публикации

Cooling of materials for electron microscopy

Номер: GB0002195430A
Автор: Bald, William Balfour, BALD WILLIAM BALFOUR, WILLIAM BALFOUR * BALD
Принадлежит:

Apparatus for cooling (e.g. freezing) material (especially a biological specimen), comprises: carrier means for carrying the material housed in a pressurisable first vessel portion (1); a pressurisable second vessel portion (2) for coupling to the first vessel portion, for receiving the carrier means projected from the first vessel portion into the second vessel portion, with said carried material, the second vessel portion containing liquid coolant for receiving the projected carrier means. The resultant material can be examined by microscopy, especially electron microscopy. The first and second vessel portions 1, 2 are provided with respective relief valves (8, 9) and a jacket (4) surrounding the second vessel portion (2) is evacuable via a valve (5). The carrier means is held against a spring loading and released by a trigger (30). ...

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Номер записи: 3