| 摘要 |
An apparatus for cryogenically freezing tissue specimens includes a linear motion platform and a pair of rotary motion platforms. The rotary motion platforms can be used alternatively with respect to the linear motion platform and a mechanism is provided to automatically trigger the linear motion platform for movement and to reset the linear motion platform when the rotary motion platforms are placed in covering relationship with or removed from covering relationship with respect to the linear motion platform. Cryogenic fluids are supplied to tissue receiving cryogenic discs on the various platforms through flexible plastic tubing. The tubing that supplies cryogenic fluid to the rotary motion platforms is constructed so as to form a series of loose loops in conjunction with tails that are mounted over a central rod to allow movement at cryogenic temperatures. The apparatus also includes elevation pylons for maintaining specimen receiving plates on the linear motion platform in a raised position prior to placement of the specimen in conjunction with the platform. Heaters and control systems are provided with respect to sets of the cryodiscs to allow an operator to select between using all of the discs or only groups of them.
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